************ WORLD TEAM ENDGAME "D" MOVE TREE *******************
Move Tree Key:
() Lines alternate numbers for White's options, letters for Black---this
way when we update after moves played the code stays consistent.
() Emphasis is on early-move options; long lines are footnoted
and appear at the bottom.
() Departures from the SmartChess FAQ are labeled "@", or "!" if
especially noteworthy in "danger" lines.
() Source posts are referenced as [Name, ab/#####] and appear in full
and clickable at the bottom as References sorted by Name. You can also
just cut-and-paste the "ab/#####" part and stick it between "/posts/" and
".asp" in the BBS URL in your browser window. Links not at this BBS are
footnoted as [Name, Key]---use your browser-find on Key to find the
link below.
() IMHO marks my own new opinions; KWR marks ones I've given before;
others' opinions are quoted.
() Standard chess devides: "+" means check, "+-" means White wins,
[] means move is (or looks) forced, ! means move looks especially good,
!? means "worthy of attention" or "speculative", and "?!" means "dubious".
() White is "he" for Kasparov; Black is "we" for the World.
------------
From current position, expected play is 49.Kxg6 d2 50.h8=Q d1=Q.
1. 51. Qh5: [***NOT CHANGED SINCE 9/19; must read FAQ and others' reports***]
a) 51...Qc2+ 52.Kh6 d5:
Q1) Query: If White plays Qh1+xd5, are we confident that the
remaining Black Pawn on b7 doesn't disturb the EGTB-drawness
of the position without it?
1) 53.g6 Qd2+ 54.Kh7 Qd3 55.Kh8: regarded as difficult for Black
by IM2429 after 55...Qd4+ 56.g7 Kb2!? e.g. 57.Kg8 Qf4 or
57.Qf3 Qh4+ 58.Kg8 Qe7 59.Kh7 Qc7 60.Kg6 Qc8.
Q2) Query: maybe 55...b5 56. g7 Qd4/c3 helps, but I think
Black can get better versions of this in
lines___FILL-IN where he already has a pawn on b4.
b) 51...Qc1
1) 52.Kg7 IM2429: "seems to draw as in FAQ or GM School page"
2) 52.Qe2 FAQ: winning, or at least highly annoying for Black:
a) 52...Qf4!? 53. Kh5 Qf5 "and how does
White make progress?" (IM2429)
b) 52...Qc6 53.Kh6 d5+ 54.g6 b5 55.Qe7
Qc1+ 56.Kh7 Qh1+ 57.Kg8;
IM2429 wonders if Black is OK with 57...Qe4.
3) 52.Kh7 Qc7+ 53.Kh6 Qc1 and White has many tries as enumerated
by IM2429: 54.Qf3; 54.Qg6+!?; 54.Qe2. IMHO (KWR) Black is not
happy after 54. Qg6+(!) Ka2 55. Qf7+, because on 55...Kb1 56. Qf5+
he is facing checking interpositions on f6 or f7,
while 55...Ka3!? 56. Qf3+ Ka2 57. Qd5+
Ka1 58. Qa5+ is progress after ...Kb1
59. Qf5+ or ...Kb2 59. Kg7 (no checks!), and 55...Ka3 56. Qf3+ Ka4
seems no better and too near EGTB Pawnless losses.
IM2429: 51...Qc1 looks like a draw, but it's not 100% sure.
KWR: If we can't improve on b3), then I fear White's tempos without
Black having advanced his pawns and his freedom of Queen movement
outweigh the fact that Black has slowed up g6 into the move-60's.
However, the resulting positions with the g-pawn on g6 should be
compared with those in other lines below.
c) 51...Qd4!?
1) 52.Kh7 Qe4+ 53.g6 (Qg6?! d5!) d5:
IM2429: I'd guess draw, but this is just one line among many...
KWR: I'd be delighted to achieve this: 54. Qd1+ Ka2 or Kb2
seems to go nowhere for White, and I don't immediately see
any way for White to improve his Q or emerge with his King.
Black controls the whole center from a key square (e4) that
seems to grant almost complete freedom. If White can make trouble
against this then Black must be in deep trouble overall:-(.
However, White can deny Black this with tricky tactics
in both 52. Qf3 and 52. Qh1+.
2) 52. Kf7 ---can ignore since it's no better than 51. Kf7. (?)
3) 52. Qf3 has purpose---these "creeping moves" have
to be looked at in general, and this one may qualify as a
/temptation/ for Black to carry out "his strategy":
a) 52...d5
1) 53. Kf7!
a) Qe4?! 54. Qf1+ Kb2 (looks better than
...Ka2 here) 55. g6, and White will achieve g7 with
his King already on the f-file---even worse, 55...d4
allows centralization with check. But Black can try:
b) 53...Qe5, when I don't know what to think after
either 54. g6 or 54. Qf6. But better seems:
b) 52...b5(!), keeping c4 and adding a7 as checking squares.
1) 53. Qf1/f5+ Ka2 54. Qxb5 d5(!) leads to a position
I've arrived at from other lines as well. Let me call it
CRITICAL EARLY POSITION [I](1c3b). Since 55. Qf1+ Ka2
56. Kf7 fails to ...Qa7+, and Black is closer both in
the Pawn race and to EGTB-draw-land, I'm quite happy
with this one---but it needs confirmation.
2) 53. Qf6
a) 53...Qe4+
1) 54. Qf5 d5! 55. Kf6 Qxf5+!
56. Kxf5 d4 works for Black since the b-pawn is
aleady on b5: 57. Ke4 Kc2! 58. Kxd4 b4 and Black
has just enough elbow-room to avoid getting mated after
both sides Queen.
2) 54. Kg7 b4! and White has done nothing.
4) 52. Qh1+ {My main concern}
a) 52...Ka2
1) 53. Kh7:
a) 53...d5 54. g6, and does Black have nothing
better than 54...Qd3, likely transposing into lines
with 51...Qd3+ --?
b) 53...b5. Does this rate a "!"? White will achieve
both g6 and g7 quickly, but is this bad for Black?:
1) 54. g6 b4 55. g7 (55. Qa8+ and 55. Qg2+ probably
need labeled branches too) Qd3+ 56. Kh8, when we have a pair:
CRITICAL EARLY POSITION (1c4b.1): 56...Qd4
CRITICAL EARLY POSITION (1c4b.2): 56...Qc3.
Is the d6-pawn an important difference from the
pawnless-EGTB drawing lines? Is Black's b4-pawn
both a useful shield and answer to White tries
that are not with immediate check or threats?
[other tries can be added anytime. Bust away...:-]
d) 51...Qd3+: IM2429 "is given an exclam mark in FAQ, I fail to
understand why." KWR: I agree. [Analysis later; I made a
post[1] explaining why several moves in the FAQ line look poor
to me, as they do to IM2429: "52.Kg7 Qc3+ (is this the most
accurate!?) 53.Kh7 Qe5 (maybe better is 53...Qc7+ transposing to
51...Qc1 52.Kh7) 54.Qh1+ Ka2...", when IM2429 raises 55.g6!?
before-or-after 55. Qg2+.
e) 51...Qd5 (Jirka)[should have a footnote to his posts here; I
can't find them right now]
KWR: Also centralizing, and may ultimately prove
better than my suggested 51...Qd4. My concern:
1) 52. Kh6:
a) 52...Qe4 53. g6 (Qg6 d5! and...?) and KWR:
I'd rather have ...d5 or ...b5 in by now.
b) 52...Qd2 53. Qg6+ KWR: is this enough better
than the 51...Qc1+ line 1b3) to be worth it?
c) 52...Qe5 53. Qg6+ Ka2 54. Qf6 Qe3 55. Kg7:
Can be called "CRITICAL", but the next is too:
d) 52...b5 53. g6 Qd2+ 54. Kh7 (Qg5 Qh2+ 55. Kg7!?):
54...Qd3 CRITICAL EARLY POSITION 1e1d)
54...b4?? 55. g7 oops! +- since Black K on b1.
Other tries by Black here?
http://bbs.msnbc.com/bbs/kasparov-team/posts/pq/74115.asp
------------------------------------------------------------------------
Ulf's 51.Qh5 Qc2+ Refut. - FAQ problem?
Fritz
parsip-net-27.intac.com
Sun Sep 26 06:13:52
Hi,
Yesterday Ulf suggested there may be a danger in the FAQ main line
after 52.Kh6 Qc1 53.Qg6+ Ka2 54.Qf7+ d5
55.Qxd5+ Ka1
The FAQ continues 56.Kh7 Qc7+ etc. leading to a stalemate in the main
line at round 61.
Ulf proposed:
56.Qa5+!? Kb1 which I believe was not in the FAQ then,
and claimed it can lead to a white win.
I then tried to show it's just another draw, see the thread at:
http://bbs.msnbc.com/bbs/kasparov-team/posts/zk/73969.asp
The problem is that in today's latest FAQ, SmartChess does have the
56.Qa5+ variant, but it seems to ignore this thread, and apparently
just assumes white will accept a draw by repetition:
57.Qb5+ Ka1=
OTOH, if white is not so generous, it seems to me he could reply:
58.Qa4+!?, for example:
58...Kb1 59.Qe4+! Ka2 60.g6
------------------------------------------------------------------------
2. 51. Qh7:
a) 51...Qf3 {IM2429---I don't fully understand this move.}
1) 52.Kh6+!?
a) 52...Ka2
1) 53.Qc2+ Ka3 54.g6 {"perhaps drawish"---IM2429}
2) 53.g6 {ditto}
b) 52...Kc1 53.Qc7+ Kb1 54.g6,
c) 52...Ka1 53.Qg7+ Kb1 54.Qg6+ Ka2 {transposes to 52...Ka2}
2) 52. Qf7
a) 52...Qc6
1) 53. Kh6
a) 53...d5+
1) 54. g6 d4
1) 55. Qb3+ Kc1 56. Kg5 Qc5+ 57. Kf6 Qd6+ 58. Kf5 d3
59. Qc4+ Kb2 60. g7 Qd7+ 61. Kf6 Qd6+ =
2) 55. Kg5 Qg2+ 56. Kf6 d3 57. Qb3+ Qb2+ 58. Qxb2+ Kxb2
59. g7 d2 60. g8=Q d1=Q 61. Qg2+ =Draw
2) 54. Qf6 d4 55. Qxc6 bxc6 56. g6 d3 57. g7 d2 58. g8=Q d1=Q $19
b) 53...b5?! 54. g6 d5 55. Kh7 d4 56. g7 Qh1+ 57. Kg6 Qg2+ 58. Kf6 Qf3+
59. Ke6 Qb3+ 60. Ke7 Qa3+ 61. Ke8 Qa8+ 62. Kd7 Qa7+ 63. Ke6 +-
c) 53... Qh1+
1) 54. Qh5
a) 54...Qc6 55. g6 Qc1+ 56. Kh7 Qc7+ 57. g7 d5 58. Kh8 Qc3
59. Qf5+ Kb2 60. Qxd5 Qh3+ 61. Kg8 Qc8+ 62. Kf7 Qc7+
63. Kf6 Qf4+ 64. Qf5 Qd6+ 65. Kg5 Qg3+
1) 66. Kh6 Qh4+ 67. Qh5 Qf6+ 68. Kh7 Qe7 69. Qh2+ Kb1
70. Qf4 Qd7 71. Qf1+ Kc2 72. Qg2+ Kc1 73. Kh8 Qd4
74. Qxb7 Qe5 EGTB=
2) 66. Qg4 Qe5+ 67. Kg6 Qd6+ 68. Kf7 Qc7+
69. Kf6 Qd8+ 70. Kg6 70... Qd6+ =
b) 54...Qd5 55. g6 Qe6 56. Kh7 Qe4 57. Qd1+ Kb2 58. Qxd6 b5
59. Qf6+ Kc2 60. Kh6 Qe3+ 61. Qg5 Qh3+ 62. Qh5 Qe3+
63. Kh7 b4
1) 64. g7 Qe7
1) 65. Kh8 Qf6 66. Qc5+ {66. Kh7 Qe7 =} Kd1
1) 67. Qxb4? Qh6+ 68. Kg8 Qe6+ =
2) 67. Qd5+! Kc2 68. Qc4+ Kd1 69. Qg4+ +-
2) 65. Qf5+ Kb2 {transposes to 64.Qf5+}
2) 64. Qf5+ Kb2 65. g7 Qe7 66. Qf4 Qd7
1) 67. Qxb4+ Ka2 = {but 67... Kc1? 68. Qc3+ +-}
2) 67. Kh8 Qh3+ 68. Kg8 b3 69. Qd4+ Kc2 70. Kf8 Qf5+
71. Ke7 Qg5+ 72. Qf6 Qxf6+ 73. Kxf6 b2
74. g8=Q b1=Q =Draw
2) 54. Kg7 Qc6 55. g6 b5 56. Kf8 Qc5 {transposes to 53. Kh7}
2) 53. Qb3+ Ka1 54. Kf7 b5 55. g6 d5 56. g7 Qd7+ 57. Kg6 Qe6+
58. Kh7 Qf5+ 59. Kh8 Qh5+ 60. Kg8 Qe8+ =
3) 53. Qf1+ Kc2 54. Qe2+ Kb1 55. Qd3+ Ka1 56. Kf6 d5+ 57. Ke5 Qe8+
1) 58. Kf5 Qf7+ 59. Kg4 Qd7+ 60. Qf5 Qa4+ 61. Qf4 d4 62. g6 Qd7+
63. Qf5 Qxf5+ 64. Kxf5 d3 65. g7 d2 66. g8=Q d1=Q 67. Qg7+ =Draw
2) 58. Kxd5 Qg8+ =Draw
4) 53. Qf5+ Kc1 54. Kf6 b5 55. g6 Qc3+ 56. Kf7 Qc4+ 57. Ke7 Qc7+
58. Qd7 Qc3 59. Qxd6 b4
1) 60. Kf7 b3 61. g7 b2 62. g8=Q Qb3+ 63. Qe6 Qxe6+
64. Kxe6 b1=Q =Draw
2) 60. Qf6 Qxf6+ 61. Kxf6 b3 62. g7 b2 63. g8=Q b1=Q =Draw
5) 53. Kh7 b5 54. g6 Qh1+ 55. Kg8 Qa8+
1) 56. Kg7 Qc6
1) 57. Kf8 Qc5 58. g7 Qc8+ 59. Qe8 Qf5+ 60. Kg8 Qd5+
61. Kh7 Qh1+ 62. Kg6 Qg1+
1) 63. Kf7 Qf2+
1) 64. Ke7 Qh4+
1) 65. Kxd6 Qd4+ 66. Ke6 Qxg7 67. Qxb5+ =Draw
2) 65. Kd7 Qg4+ 66. Kxd6 Qxg7 67. Qxb5+ =
2) 64. Kg8 Qf5 65. Kh8 Qh3+ 66. Kg8 Qf5
67. Qf7 Qc8+ 68. Qf8 Qe6+ 69. Kh7 Qh3+
70. Kg6 Qg4+ 71. Kf7 Qf5+ 72. Ke7 Qe4+
73. Kd7 Qb7+ 74. Kxd6 Qb6+ 75. Kd5 Qb7+
76. Kc5 Qc7+ 77. Kb4 Qc4+ 78. Ka5 Qc7+
79. Ka6 Qc6+
1) 80. Ka7 Qc7+ 81. Ka8 Qc6+
82. Kb8 Qb6+ 83. Kc8 Qc6+
84. Kd8 Qb6+ =
2) 80. Ka5 Qc7+ 81. Kxb5 Qb7+ EGTB=
2) 63. Kh6 Qc1+ 64. Kh5 Qh1+ 65. Kg6 Qg1+ =
2) 57. Kh8 Qc8+ 58. Qg8 Qh3+ 59. Kg7 b4 60. Qd5 b3
61. Qxd6 b2 62. Qd1+ Ka2 63. Qa4+ Kb1 64. Qd1+ =Draw
2) 56. Qf8 Qd5+ 57. Qf7 Qa8+ =
b) 52...Qe4+?! 53. Qf5 d5 54. Kf6 Kc1 55. g6 Qd4+ 56. Kf7 Qc4
57. g7 Qc7+ 58. Kg6 Qd6+ 59. Qf6 +-
--------
3) 52. Kg7+ Kc1
1) 53. Qh2 d5 54. Qc7+ Kd2 55. Qxb7 Qc3+ =
2) 53. g6 b5
1) 54. Qh4 b4 55. Qxb4 d5 =
2) 54. Qh6+ Kc2
1) 55. Kg8 b4 =
2) 55. Kh8 Qa8+ 56. Kh7 Qe4 57. Qh2+ Kc1 58. Qxd6 b4=
4) 52. Qd7
a) 52...Qe4+? 53. Qf5 d5 54. Kf6 Kc1 55. g6 +-
b) 52...Kc1
1) 53. Qc7+ Kb1 54. Qxd6 b5 55. Qf6 Qg3 56. Qf5+ Ka1 57. Qxb5 EGTB=
2) 53. Qxd6 b5 54. Qc5+ Kd1 {54... Kb1? 55. Qf5+ +-} 55. Qxb5 EGTB=
-----
b) 51...d5 {Originally advocated by KWR & GM School & others}
1) 52.Kf6+
a) 52...Ka2 {!-IM2429 "according to FAQ and GM School"}
1) 53. Qh2+ {"!?-ignored by both FAQ and GM-School" --IM2429}
a) 53...Kb1
1) 54. g6 Qf3+ 55.Kg5 Qe3+ 56.Qf4 Qe7+ 57.Kh6 Qe6
58.Qf3 {"and black may be in trouble"---IM2429}
2) 54. Qf2 {transposes to central 51. Qh7 Ka1 line }
2) 53.Qf5 Qd4+
1) 54. Ke6
a) 54...b5! {"=" GM School: "Black has two passed pawns!}
1) 55. Qc2+ Ka3 56. g6 b4 57. Qc1+ Ka2 58. Qc2+ Ka1
59. Qg2 b3 60. g7 Qb6+ 61. Ke5 Qc7+ 62. Kd4 Qc4+ =
2) 55. Qxd5+ Qxd5+ 56. Kxd5 b4 57. g6 b3 58. g7 b2
59. g8=Q b1=Q =Draw
b) 54...Qe4+ 55. Qe5 b5 =
2) 54. Kf7 Qc4 55.g6 d4+ {"=" GMS, rest is FAQ}
1) 56. Qe6 Qxe6+ 57. Kxe6 d3 58. g7 d2 59. g8=Q d1=Q =Draw
2) 56. Kf8 d3 57. g7 Qb4+ 58. Ke8 Qa4+ 59. Kf8 Qa3+ =
3) 54. Qe5 Qb6+
1) 55. Kf5 d4 56. g6 Qb1+ 57. Kf6 Qb6+
1) 58. Kg5 Qd8+ 59. Qf6 Qd5+ 60. Qf5 Qd8+ 61. Kf4 Qc7+
62. Ke4 Qc2+ 63. Ke5 Qc5+ 64. Kf4 Qc1+ =
2) 58. Kf5 Qb1+ =
3) 58. Qe6+ Qxe6+ 59. Kxe6 d3 60. g7 d2 61. g8=Q d1=Q
62. Qa8+ =Draw
2) 55. Kf7 d4 56. g6 d3
1) 57. g7 d2 58. g8=Q Qb3+ =
2) 57. Qd5+ Qb3 58. Qxb3+ Kxb3 59. g7 d2
60. g8=Q d1=Q EGTB=
3) 53. g6 {FAQ; GM School stops at "2)" above}
a) 53...Qd4+
1) 54. Ke6
a) 54...Qb6+ 55. Kf7 Qc7+ 56. Kf6 Qc6+ 57. Ke5 Qc3+ =
b) 54...Qg4+?!
1) 55. Ke7! Qe4+ 56. Kd8
a) 56...d4 57. Qf7+ +-
b) 56... b5 57. Qh2+ Kb1 58. Qg1+ Ka2 59. g7 +-
2) 55. Kd6? Qb4+ 56. Kxd5 Qb3+ 57. Ke4 Qc2+ 58. Kf3 Qd3+
59. Kf4 Qd4+ 60. Kf5 Qd3+ 61. Kf6 Qd4+ 62. Ke6 Qe4+
63. Kf7 Qf5+ =
2) 54. Ke7 Qe5+
1) 55. Kf7 Qf5+ 56. Kg8 Qc8+ 57. Kg7 Qd7+ 58. Kf6 Qc6+
59. Kg5 Qc1+ 60. Kf5 Qc2+ 61. Ke5 Qc3+ 62. Kxd5 Qd3+
63. Ke5 Qe3+ 64. Kf6 Qf4+ 65. Ke7 Qe5+ 66. Kf8 Qb8+
67. Kg7 Qe5+ 68. Kh6 Qh2+ 69. Kg7 Qe5+ 70. Kf7 Qf5+
71. Kg8 Qc8+ =
2) 55. Kd7 Qf5+ 56. Kd6 Qf4+ =
b) 53...Qf3+
1) 54. Ke7! Qe4+ 55. Kd8
a) 55...d4 56. Qf7+ +-
b) 55...b5 56. Qh2+ Kb1 57. Qg1+ Ka2 58. g7 +-
c) 55...Qf5 56. Qf7 Qg5+ 57. Kd7 Qh5 58. Ke6 Qh3+
59. Kxd5 Ka3 60. Qf8+ Kb2 61. g7 +-
2) 54. Ke5 Qe4+ 55. Kd6 Qf4+ 56. Kxd5 Qf3+ 57. Kd6 Qf4+
58. Ke7 Qe5+ 59. Kf7 Qf5+ 60. Kg8 Qc8+ 61. Kg7 Qd7+
62. Kf6 Qd6+ 63. Kf5 Qd3+ 64. Ke5 Qg3+ 65. Kd5 Qf3+
66. Kd6 Qf4+ 67. Kd7 Qf5+ 68. Kc7 Qe5+
1) 69. Kc8 Qe8+ 70. Kc7 Qe5+ 71. Kb6 Qd6+ 72. Ka7 Qa6+
73. Kb8 Qd6+
1) 74. Kxb7 Qd5+ EGTB=
2) 74. Qc7 Qxg6 =
2) 69. Kxb7 Qd5+ EGTB=
4) 53. Qxb7 Qd4+ 54. Kf7 Qf4+ 55. Kg6 Qe4+ 56. Kf6 56 Qf4+ =
5) 53. Qh2+ Kb1
a) 54. g6 Qf3+ 55. Kg5 Qe3+ 56. Qf4 Qe7+ 57. Kh6 Qe6
1) 58. Kh7 Qh3+ 59. Kg7 d4
1) 60. Qxd4 b5
1) 61. Qb4+ Ka1 62. Qxb5 Qc3+ 63. Kf7 Qb3+
64. Qxb3 EGTB= {Stalemate!}
2) 61. Kf7 Qf5+ 62. Qf6 Qd7+ =
2) 60. Kf6 Qe3
1) 61. Qf1+ Kc2 62. g7 Qh6+ 63. Kf7 Qh5+
64. Kf8 Qc5+ =
2) 61. Qxe3 dxe3 62. g7 e2 63. g8=Q e1=Q
64. Qb3+ =Draw
2) 58. Qf3
a) 58...d4
1) 59. Qd1+ Ka2 60. Qa4+ Kb1 61. Qxd4 Qh3+
1) 62. Kg5 Qg3+ 63. Kf5 Qf3+ 64. Qf4 Qd5+
65. Qe5 Qf3+ 66. Ke6 Qc6+ 67. Kf7 Qd7+
68. Kf6 Qc6+ 69. Kf5 Qf3+ 70. Kg5 Qg2+
71. Kh6 Qh3+ 72. Qh5 Qe3+ 73. Kh7 Qe4
1) 74. Kh6 74... Qe3+ 75. Qg5 Qh3+
76. Kg7 b5 77. Qxb5+ Ka1 EGTB=
2) 74. Kg8 Qe8+ 75. Kg7 Qe7+ 76. Kh8 Qe8+
77. Kh7 Qd7+ 78. g7 Ka1 79. Kh8 Qd4
80. Qh1+ Ka2 81. Qxb7 EGTB=
2) 62. Kg7 b5 63. Qb4+ Ka1 64. Qxb5 EGTB=
2) 59. Qxb7+ Kc2 60. Qf7 Qe3+ 61. Kh5 d3 62. Qc4+ Kb1
63. g7 d2 64. Qb4+ Kc1=
b) 58...Qd6 59. Kh7 Qh2+ 60. Kg8 Qb8+ 61. Qf8 Qe5 62. g7 d4
63. Kf7 Qf5+ 64. Ke7 Qc5+ 65. Kf6 Qc6+ 66. Ke5 Qc7+
67. Kxd4 Qd7+
1) 68. Ke4 Qe6+ 69. Kf4 Qh6+ 70. Kg3 Qg5+
71. Kf2 Qd2+ 72. Kg1 Qd4+ =
2) 68. Kc4 b5+
1) 69. Kc5 Qc7+ 70. Kxb5 EGTB=
2) 69. Kc3 Qc6+ 70. Kb4 Qc4+ 71. Ka5 Qc7+
{not 71. Ka3 Qc3 mate!} 72. Kxb5 EGTB=
b) 54. Qf2 {transposes to 51. Qh7 Ka1 52. Qg7+ Ka2 53. Qf7+ d5
54. Qf2+ Kb1 55. Kf6, a central line---OK for Black!?}
c) 54. Qf4 d4 55. g6 d3 56. g7 Qb3 {most dangerous line}
1) 57. Qg3 Qb2+ 58. Kg6 d2
1) 59. Qg1+ Qc1 60. Qb6+ Qb2 61. Qg1+ Qc1 =
2) 59. g8=Q 59... d1=Q $17
2) 57. Qf1+ Kc2 58. Qg2+ d2 =
3) 57. Ke7 Qd5 =
b) 52...Kc1 {"?!--loses", IM2429}
1) 53.Qc7+! Kb1 54.Qxb7+ Kc1 55.Qc6+ Kb2 56.g6 +- {GM School}
2) 53.Qf5 Qd4+!?:
1) 54.Kg6 Qe4 = {GMS}
2) 54.Ke6 Qe4+ 55.Kf6 Qd4+ 56.Qe5 {56.Ke6 Qe4+} Qf2+ 57.Ke6 d4 = {GMS}
3) 54.Kf7 Qe4 55.Qf1+ Kc2 56.g6 d4:
1) 57.g7 Qd5+ 58.Kf8 Qd8+ 59.Kf7 Qd5+ 60.Kg6 d3 = {GMS}
2) 57.Qc4+ Kd2 58.g7 Qf5+ 59.Ke8 Qe5+ 60.Kf8 Qf6+
61.Kg8 {61.Qf7 Qd8 =} d3 = {GMS}
c) 52...Ka1 {"? 53.Qf5 doesnt look fun}-IM2429}
2) 52.Qxb7+:
a) 52...Ka1 {GM School; note transposition from 51. Qh7 Ka1 52. Qxb7 d5}
1) 53.Kh6 d4 54.g6:
2) 53. Kh6 {GM School's only "51. Ka1?!" line---sici94.html}
{Note transposition from 51. Qh7 d5 52. Qxb7+ Ka1 53. Kh6}
a) 53...d4 {KWR: Natural, but a little dangerous?!?}
1) 54. g6
a) 54...d3 55. g7 Qc1+ {55...Qd2? 56. Kg6 +- GM School}
56. Kh7 d2
1) 57. g8=Q Qc2+ 58. Kh8 d1=Q {58...Qc3+?? 59.Qgg7 +- GMS}
59. Qgg7+ Ka2 {GMS} 60. Qa7+ Qa4 61.Qgf7+ Kb1
62.Qb6+ Kc1 =
2) 57. Qa6+ Kb1 58. Qb5+ Qb2 =
b) 54...Qd2+ {! - GM School}
1) 55. Kh5 Qh2+ 56. Kg4 Qe2+ {"=" GM School} 57. Kf4 Qe3+
58. Kf5 Qh3+
1) 59. Kf6 Qh4+ 60. Kf7 Qf4+ 61. Ke6 Qg4+
62. Kf6 Qf4+ 63. Kg7 Qe5+ 64. Kh6 Qf4+
65. Kh7 Qh2+
1) 66. Kg7 Qe5+ =
2) 66. Kg8 d3 67. Qa6+ Qa2+ 68. Qxa2+ Kxa2
69. Kf8 d2 70. g7 d1=Q 71. g8=Q+ =Draw
2) 59. Ke4 Qg2+ $19
b) 53... Qd2 =
c) 53... Qc1 54. Qxd5 EGTB=
b) 52...Kc1 {!-GM School: "Black K should be as close to his pawn,
as possible} 53.Kh6 d4 54.g6 Qd2+! 55.Kh5 Qh2+ 56.Kg4 d3! = {==FAQ}
3) 52.Kf7+
a) Ka1
1) 53.g6 d4 54.g7 Qf3+ {CLAIM: perpetual---GM School}
1) 55. Ke7 Qa3+ 56. Ke6 Qb3+ 57. Ke5 Qe3+ 58. Kd5 Qf3+
1) 59. Kxd4 Qf6+ 60. Kd3 Qf3+ 61. Kc4 b5+
1) 62. Kc5 Qe3+ 63. Kc6 Qe6+ 64. Kb7 Qd7+ 65. Kb6 Qd6+
66. Ka5 Qa3+ 67. Kb6 Qd6+ 68. Kxb5 Qd5+ EGTB=
2) 62. Kxb5 Qd5+ EGTB=
3) 62. Kd4 Qf4+
1) 63. Kd5 Qf7+ 64. Kc5 Qe7+ 65. Kxb5 Qb7+ EGTB=
2) 63. Qe4 Qd6+ 64. Kc3 b4+ 65. Qxb4 Qc7+
66. Kb3 Qf7+ 67. Kc2 Qg6+ EGTB=
4) 62. Kb4 Qf4+ 63. Ka5 Qd2+ 64. Kxb5 Qd5+ EGTB=
2) 59. Qe4 Qf7+ =
2) 55. Kg8 Qd5+ 56. Kh8 Qd8+
1) 57. g8=Q Qf6+ {(Q draws versus 2 Qs!)} 58. Qhg7 Qh4+
59. Q7h7 Qf6+ 60. Qhg7 Qh4+ 61. Q8h7 Qd8+ 62. Qgg8 Qf6+
63. Qgg7 Qd8+ 64. Qhg8 Qh4+ =perp {as in KWR's 1st post}
2) 57. Qg8 Qh4+ 58. Qh7 Qd8+ =
3) 57. g8=N d3=
2) 53. Qg7+ Kb1 54. Qg6+ Kc1 = {on an early KWR assessment}
b) 52... Kc1 $5 {?! FAQ, KWR}
4) 52. Qh5 Qxh5+ 53. Kxh5 d4 54. g6 d3 55. g7 d2 56. g8=Q d1=Q+ 57. Kh6 Qh1+
58. Kg7 Qg2+ 59. Kf8 Qxg8+ 60. Kxg8 b5 $19
5) 52. Kh6+ Kc1 53. Qc7+ Kb1 54. Qxb7+ Kc1
1) 55. Qc6+ Kb1 56. g6 Qd2+ 57. Kh7 Qh2+
1) 58. Kg7 d4
1) 59. Qe4+
a) 59...Ka2 60. Kf7 {60. Qxd4 is EGTB=} 60...d3
61. g7 {61. Qxd3 is EGTB=})
a) 61...Qc7+ 62. Kg6 Qd6+ 63. Kf5 Qd7+
1) 64. Kf6 Qd6+ 65. Kg5 Qd8+ 66. Kg6 d2
67. Qc4+ Kb1 68. g8=Q Qxg8+
69. Qxg8 d1=Q =Draw
2) 64. Qe6+ Qxe6+ 65. Kxe6 d2
66. g8=Q d1=Q =Draw
b) 61...Qh5+ 62. Qg6
a) 62...Qd5+
1) 63. Kf6 Qd8+ 64. Ke5 Qe7+ 65. Kf4
a) 65...Qc7+ 66. Kf3 Qb7+
67. Ke3 Qe7+ 68. Kxd3 +-
b) 65...Qh4+ 66. Kf3 Qh3+
67. Kf2 Qh2+ 68. Qg2 +-
2) 63. Qe6 Qxe6+ 64. Kxe6 d2
65. g8=Q d1=Q =Draw
b) 62...Qxg6+ 63. Kxg6 d2 64. g8=Q+ +-
b) 59... Kc1 $5
2) 59. Qb5+ Qb2
1) 60. Qxb2+ Kxb2 61. Kf8 d3 62. g7 d2 63. g8=Q d1=Q =Draw
2) 60. Qd3+ Qc2 61. Qxc2+ {61. Qxd4 is EGTB=} Kxc2
62. Kf8 d3 63. g7 d2 64. g8=Q d1=Q =Draw
3) 60. Qf5+ d3+ 61. Kf7 Qc2 62. g7 d2 63. Qxc2+ Kxc2
64. g8=Q d1=Q =Draw
2) 58. Kg8 d4 59. g7 d3
1) 60. Qb5+
a) 60...Ka1 61. Qxd3 EGTB=
b) 60...Kc2 61. Qc4+ Kb2 62. Qxd3 EGTB=
2) 60. Kf7 Qh5+ 61. Qg6 Qxg6+ 62. Kxg6 d2 63. g8=Q d1=Q =Draw
2) 55. g6 Qd2+ 56. Kh7 Qh2+
1) 57. Kg8 d4 58. Qe4 d3 59. Qxd3 EGTB=
2) 57. Kg7 Qe5+ 58. Kf7 Qf4+ {transposes into 52. Kf6+ Kc1
53.Qc7+ Kb1 54.Qxb7+ Kc1 55.g6 Qd4+ 56.g6 Qd4+ 56.Kf7 Qf4+}
--------
c) 51...Ka1
--------
1) 52. Qg7+
a) 52...Ka2
1) 53. Qf7+:
a) 53...d5
--------------------
1) 54. Kh7 {IMHO 9/25: Looks dangerous, gave it more depth.
Indeed, 54...b5 looks like Black's only move---Black
cannot keep White's pawn from reaching g7, and Queen moves
seem to lead to typical "Passive" losses.}
a) 54...b5 55. g6 Qd3
***CRITICAL EARLY POSITION [Q][2c1a1a1a],
Current Assessment (KWR: holding but precarious)
b)*54...Ka1 {KWR: looks too slow; Qf6 will pin again}
--------------------
2) 54. Qf2+ {Note: Transpose from 51...d5 52.Kf6+ Ka2
53.Qh2+ Kb1 54.Qf2, line }
a) 54...Kb1
1) 55. Kf6
a) 55...d4 56. g6 d3
***CRITICAL EARLY POSITION [R, 2c1a1a2a1]
Current Assessment (KWR, BBS): Black can avoid
nearby dangers and draw. See below for analysis.
2) 55. Kf7 d4 56. g6 d3 57. g7 Qb3+ 58. Kf8 Qb4+ 59. Kf7 d2
1) 60. Qg1+ Kb2 61. g8=Q Qb3+ 62. Kf8 d1=Q {4Q!}
63. Q8g7+ Ka2
1) 64. Qa7+ Qa3+ 65. Qxa3+ Kxa3 66. Qxb7 =Draw
2) 64. Qf2+ Qdc2 65. Qxc2+ Qxc2 66. Qxb7 =Draw
2) 60. g8=Q Qc4+ 61. Kg7 Qxg8+ 62. Kxg8 d1=Q
63. Qb6+ =Draw
3) 55. Kh7 $4 Qh5+ 56. Kg7 Qxg5+ $19
4) 55. Kh6 d4 56. g6 d3 57. Qb6+ Kc1 58. Qxb7 d2 59. Qc7+ Qc2
60. Qxc2+ Kxc2 61. g7 d1=Q 62. g8=Q =Draw
5) 55. Qf5+ Qc2 56. Kf6 d4 57. Qb5+ Kc1 58. g6 Qf2+
59. Ke7 Qe3+ 60. Kf8 d3 61. g7 Qf4+ 62. Ke7 Qc7+
63. Kf6 Qf4+ =
--------------------
3) 54. Qxb7 d4 =
4) 54. Kh6 b5 55. g6 Qd2+
1) 56. Kh5 56... Qh2+ 57. Kg5 Qg3+ 58. Kf6 Qh4+ 59. Kg7 Qd4+
60. Qf6 Qa7+ 61. Kf8 Qb8+ =
2) 56. Kh7 Qd3 {transposes to 54.Kh7}
--------------
2) 53. Qxb7 d5 54. Kf6 Qd4+ 55. Kf7 Qf4+ 56. Kg6 Qe4+ 57. Kf6 Qf4+ =
3) 53. Kf7
a) b5 {cbo}
1) 54. Qf8 Qh5+ 55. Kf6 Qf3+ 56. Kg7 Qc3+ 57. Qf6 b4
58. g6 d5 59. Kf7 Qxf6+ 60. Kxf6 b3 61. g7 b2
62. g8=Q b1=Q 63. Qxd5+ =Draw 4Q!
2) 54. Qc3 Qd5+ 55. Kf6 b4 56. Qxb4 Qe5+ 57. Kg6 d5 =
4) 53. Kh7 b5 54. Qf7+ d5 {Transposes to 53.Qf7+ d5 54.Kh7 b5}
------------
b) 52...Kb1 {"?!"-[IM2429, na?]}
1) 53. Kf7 {!?-[IM2429]}
a) 53...Qd5+ 54.Ke7 b5 55.g6 Qb7+ 56.Kf6 Qd5 57.Qd7 Qe5+
58.Kf7 b4 59.g7 Qh5+
1) 60. Kf8 Qf3+ 61. Qf7 Qa8+ 62. Qe8 Qf3+ 63. Qf7 Qa8+
64. Ke7 Qa7+ =
2) @60.Ke7!? {IM2429} Qg5/h4+ 61.Kf8 Qf6+ 62.Ke8 Qe5+
63.Qe7
{and not sure whether its drawn or a white win--IM2429}
2) 53. Qxb7+ Ka1 54. Qg7+ Kb1 = {in view of ...d6-d5-d4}
3) 53. Qf6
a) Qc1 {cbo}
1) 54. Qxd6 b5 55. Qb4+ Ka1 56. Qa5+ Kb1 57. Qxb5+ Ka1 EGTB=
2) 54. Kg7 Qc7+ 55. Qf7 Qc3+ 56. Qf6 Qc7+ 57. Kh6 Qc1
1) 58. Qxd6 b5 59. Qb4+ Ka1 60. Qa5+ Kb1 61. Qxb5+ Ka1 EGTB=
2) 58. Qg6+ Ka1 59. Qg7+ Ka2 60. Qxb7 Qd2 61. Qf3 d5
62. Kg6 d4 63. Kf5 d3 64. g6 Qa5+ 65. Kf4 d2 =
3) 54. Qf5+ Ka2 55. Kg7 Qc3+ 56. Qf6 Qc7+ 57. Kg6 Qc2+ =
4) 53. Kh6 Qh1+ 54. Kg6 Qe4+ 55. Kf6 Qe5+ 56. Kf7 (56. Kg6 Qe4+ =)
56... Qd5+ {transposes to 53.Kf7, line }
5) 53. Kh7 b5 54. g6 b4 55. Qh6 Qd3 =
6) 53. Kf6 Qd4+ 54. Kf7 Qd5+ {transposes to 53.Kf7, line }
--------
2) 52. Kf7 Qd5+ 53. Kg6 Qe6+
1) 54. Kh5 Qh3+ 55. Kg6 Qe6+ =
2) 54. Kg7 Qe7+ 55. Kh6 Qe6+ 56. Kh5 {- 54.Kh5})
3) 52. Kf6
a) Qd4+
1) 53. Kg6 Qd3+ 54. Kg7 Qd4+ 55. Kg6 Qd3+ 56. Kh6 Qh3+
1) 57. Kg6 Qe6+ =
2) 57. Kg7 Qd7+ 58. Kh6 Qh3+ 59. Kg7 Qd7+ 60. Kg6 Qe6+ =
2) 53. Kf7 Qd5+ 54. Ke7 (54. Kg6 54... Qe6+ $11) 54... Qxg5+
55. Kxd6 EGTB=
3) 53. Ke7 Qe5+ 54. Kd7 Qxg5 55. Kxd6 EGTB=
4) 52. Kh6
a) 52...Qd2
1) 53. Qxb7 d5 54. Kg6 d4 55. Kf5 Qf2+ =
2) 53. Qg7+ Ka2 54. Qxb7 d5 55. Kh5 Qe2+
1) 56. Kg6 Qe4+ =
2) 56. Kh6 Qd2 =
3) 56. Kh4 Qe4+ =
b) 52... d5 53. g6 Qd2+ 54. Kg7 b5 =
5) 52. Qxb7
a) 52...d5 {clear best option?}
1) 53. Kf7 d4 54. g6 d3 55. g7 Qf1+ 56. Ke8
a) 56...Qe2+ 57. Kf8 d2
1) 58. g8=Q Qf2+ 59. Ke8 Qe3+ 60. Kf8 Qf4+ 61. Ke8 Qe5+
62. Kf8 Qf6+ 63. Qbf7 Qxf7+ 64. Qxf7 d1=Q =Draw
2) 58. Qa7+ Kb1
1) 59. g8=Q Qf3+ 60. Ke8 Qe4+ 61. Kf8 Qf5+
62. Qaf7 Qxf7+ 63. Qxf7 d1=Q =Draw
2) 59. Qb6+ Kc1 60. Qc5+ Kb1 61. Qb4+ Kc1
62. Qc3+ Kb1 63. g8=Q Qf2+ 64. Ke8 Qe2+
65. Kf8 Qf2+ 66. Qf7 Qxf7+ 67. Kxf7 d1=Q =Draw
b) 56...d2
1) 57. Qa7+ Kb1 58. Qb6+ Kc1 59. Qc5+ Kb1 60. Qb4+ Kc1
61. Qc3+ Kb1 62. Qxd2 Qb5+ EGTB=
2) 57. g8=Q Qe2+ 58. Kf8 Qf2+ 59. Qgf7 Qxf7+ 60. Qxf7
60...d1=Q =Draw
2) 53. Kh6 {GM School's only "51. Ka1?!" line---sici94.html}
{Note transposition from 51. Qh7 d5 52. Qxb7+ Ka1 53. Kh6}
a) 53...d4
1) 54. g6
a) 54...d3 55. g7 Qc1+ {55...Qd2? 56. Kg6 +- GM School}
56. Kh7 d2
1) 57. g8=Q Qc2+ 58. Kh8 d1=Q {58...Qc3+?? 59.Qgg7 +- GMS}
59. Qgg7+ Ka2 {GMS} 60. Qa7+ Qa4 61.Qgf7+ Kb1
62.Qb6+ Kc1 =
2) 57. Qa6+ Kb1 58. Qb5+ Qb2 =
b) 54...Qd2+ {! - GM School}
1) 55. Kh5 Qh2+ 56. Kg4 Qe2+ {"=" GM School} 57. Kf4 Qe3+
58. Kf5 Qh3+
1) 59. Kf6 Qh4+ 60. Kf7 Qf4+ 61. Ke6 Qg4+
62. Kf6 Qf4+ 63. Kg7 Qe5+ 64. Kh6 Qf4+
65. Kh7 Qh2+
1) 66. Kg7 Qe5+ =
2) 66. Kg8 d3 67. Qa6+ Qa2+ 68. Qxa2+ Kxa2
69. Kf8 d2 70. g7 d1=Q 71. g8=Q+ =Draw
2) 59. Ke4 Qg2+ $19
b) 53... Qd2 =
c) 53... Qc1 54. Qxd5 EGTB=
6) 52. Qh8+ Kb1 53. Qh7 Ka1 54. Qh8+ Kb1=
----------------------
d) 51... b5
--------
1) 52. Kf6+
a) 52...Ka2 {JL; still not in SmartChess FAQ!?}
1) @53. Qa7+:
a) 53...Kb3 {"instead of ?Kb1" [JL9/23, wp/72744]}
1) 54. g6 Qf3+ 55. Ke7 Qe4+ {forces White K to return}
2) 54. Qf2 Qa1+ 55. Kf7 Qe5 56. g6 Qh5
1) 57. Kf6 Qe5+ 58. Kf7 Qh5 {Black's idea is repeating}
2) 57. Qe3+ Ka4.
CRITICAL EARLY POSITION [X][1d1a1a].
Black has accomplished the "Strategy K" moves; the question is, will
he have enough checks when White unpins? Black is just one tempo behind
in the pawn race, but White has his King to the left of the g-pawn. SEE BELOW
2) 53. Qe4 d5 54. Qg2+ Ka1 55. g6 Qd4+ 56. Kf7 Qa7+ 57. Ke6
a) 57...Qe3+ 58. Kxd5 Qd3+ 59. Kc5 b4
1) Kxb4 EGTB=
2) 60. g7 Qc3+ 61. Kb5 Qd3+ 62. Kxb4 EGTB=
b) 57... Qb6+? 58. Kf5
a) 58...d4 59. Qa8+ Kb1 60. g7 +-
b) 58...Qc5 59. g7 d4+ 60. Kg6 Qd6+ 61. Kh7 +-
b) 52... Kc1
1) 53. Qe4 b4 {cbo}
1) 54. g6
2) 54. Qc4+ Qc2 55. Qf1+
a) 55...Qd1 56. Qf4+ Qd2 57. Qc4+ Qc2 58. Qxb4 Qf2+
59. Kg7 d5 60. Qc3+ Kb1 61. Qb3+ Ka1 62. Qxd5 EGTB=
b) 55...Kd2? 56. Qf4+ Kd1 57. g6 b3 58. g7 b2 59. g8=Q b1=Q
60. Qg1+ +-
2) 53. Qc7+ Kb2 54. g6 Qf3+
1) 55. Kg7 b4 56. Qf7
a) 56...Qh3 57. Kg8 b3 58. g7 Qc8+
1) 59. Kh7 Qh3+ 60. Kg6 Qg4+ 61. Kf6 Qh4+ 62. Ke6 Qc4+
63. Ke7 Qc7+ 64. Kf8 Qd8+ 65. Qe8 Qf6+ 66. Qf7 Qd8+ =
2) 59. Qf8 Qe6+ 60. Kh8 Qh6+ 61. Kg8 Qe6+ =
b) 56...Qc3+ 57. Kf8 Qh8+ 58. Ke7 Qe5+ 59. Kd7 Qb5+
60. Kc7 Qa5+ 61. Kb7 Qb5+ 62. Ka8 Qc6+ 63. Kb8 Qb6+ =
2) 55. Ke6 Qe4+ =
3) 53. g6
a) 53...Qf3+ 54. Ke7 Qe4+
1) 55. Kd8 Qa8+ 56. Kc7 Qa7+ 57. Kc6 57... Qa6+ =
2) 55. Kd7 Qb7+ 56. Kxd6 Qb6+ =
b) 53...b4? 54. Qh6+ Kb1 55. g7 Qf3+ 56. Ke6 +-
c) 52...Kb2:
1) 53. Qh2+
a) 53...Ka1
1) 54. Qf4
a) 54...b4 {"! (...d5 loses)"--[Amann, yt/74202]}
***CRITICAL EARLY POSITION [Y][2d1c1a1a]
--------
2) 52. Kf7+
a) Ka2 {cbo?}
1) 53. Qf5
a) 53... Qh5+ 54. Kf6 b4 55. g6 Qh4+ 56. Kf7 b3 57. g7 Qc4+
58. Kf8 b2 =
b) 53... b4? 54. g6 Qd4 55. g7 Qa7+ 56. Kg6 +-
c) 53... d5 54. g6 Qd4 55. Ke6 b4 56. Qxd5+ Qxd5+ 57. Kxd5 b3
58. g7 b2 59. g8=Q b1=Q =Draw
2) 53. Qe4 d5 54. Qg2+ Ka1 55. g6 Qh5
1) 56. Kg8 b4 57. g7 Qe8+ 58. Kh7 Qh5+ 59. Kg8 Qe8+ =
2) 56. Qf1+ Ka2 57. Qxb5 Qf5+ 58. Kg7 Qe5+ 59. Kg8 Qe6+
60. Kh7 Qh3+ 61. Kg7 d4 62. Qa4+ Kb1 63. Qxd4 EGTB=
3. [more to come...]
************************************
ANALYSIS OF CRITICAL EARLY POSITIONS
************************************
------------------------------------
[Q] Analysis of [2c1a1a1a], FEN 8/5Q1K/6P1/1p1p4/8/3q4/k7/8+w
Arises from 51. Qh7 Ka1 52. Qg7+ Ka2 53. Qf7+ d5 54. Kh7 b5 55. g6 Qd3.
Current Assessment (KWR: holding but precarious)
1) 56. Kg8 b4 57. g7 b3 58. Qa7+
a) 58...Kb2
1) 59. Kf8 Qf5+ 60. Qf7 Qc8+ =
2)! 59. Qf2+
a) 59...Ka1?! 60. Kf7! {no checks!}
a) 60...b2 61. g8=Q b1=Q 62. Qa8+ +-
b) 60...Qh7 {just doesn't look healthy--KWR}
b) 59...Kc1?! 60. Kf7 b2 61. g8=Q b1=Q 62. Qg1+ +-
c) 59...Ka3?! 60. Kf7 b2 61. g8=Q b1=Q 62. Qa8+ Kb3
63. Qb8+! Kc3 64. Qc5+ Kd2 65. Qf4+ Kd1 66. Qg4+ Kd2
67. Qg5+! Kd1 68. Qh5+ Kd2 69. Qh2+ Qe2 70. Qf4+ Kd1
71. Qg1+ Kc2 72. Qf5+ +- {Pretty, no? --KWR}
d) 59...Qc2! {looks natural!}
1) 60. Qf6+
a) 60...Qc3? 61. Kf7! +-
b) 60...Ka2 61. Kf7 Qc7+ {This looks like a perpetual,
but it needs some double-checking}
c) 60...Ka1 61. Kf7 Qc7+ {ditto}
2) 60. Qd4+
a) 60...Ka2?! 61. Kf7 {Looks more dangerous now...}
b) 60...Ka1?! 61. Kf7 {ditto}
c) 60...Qc3! {Looks good enough to stop White's tries.}
3) 60. Qf4!? {Not entirely without poison}
a) 60...Ka2?! 61. Kf7 b2 {61...Qh7!??} 62. g8=Q b1=Q
63. Qa8+ Kb2 64. Qd4+! {and I claim another pretty
win for the two White Queens}
b) 60...Ka1!? 61. Kf7 b2 62. g8=Q b1=Q 63. Qa8+ Qca2
{and the corner defense seems to hold}
c) 60...Qc8+ {also looks fine, IMHO}
b) 58...Kb1 {looks better than 58...Kb2, less chances for White, IMHO}
{was not in earlier FAQs}
1) 59. Kf8 Qf5+ 60. Qf7 Qc8+ 61. Ke7 Qc5+ 62. Ke6 Qe3+
63. Kxd5 Qd3+ 64. Kc5 Qe3+ 65. Kc4 Qe2+
1) 66. Kxb3 Qa2+
2) 66. Kb4 Qd2+ 67. Ka4 Qa2+ 68. Kb5 Qe2+ 69. Kb6 Qe3+
70. Kb7 Qe4+ 71. Kc8 Qc6+ 72. Kd8 Qd6+ 73. Ke8 Qc6+
74. Ke7 Qc7+ 75. Kf6 Qf4+ 76. Kg6 Qg4+ 77. Kh6 Qh4+
78. Qh5 Qf4+ 79. Qg5 Qh2+ 80. Kg6 Qd6+ 81. Qf6 Qg3+
82. Kh7 Qh3+ 83. Kg8 Qc8+ 84. Qf8 Qe6+ 85. Qf7 Qc8+ =
{KWR, 9/25: Haven't checked this yet, but it tells me
that /all/ the checking lines in this ending need
a little more work.}
2)! 59. Qg1+!? Ka2! 60. Kf7 Qf5+ {needs work similar to 1) -KWR}
2) 56. Kh6 Qd2+ = {FAQ; I haven't done anything more from here on yet.}
3) @56. Qf2+ {IM2429} Kb3 57.Kh6 Qh3+ 58.Kg5 Qc3 59.Qf5 b4
{looks drawn---IM2429}.
-------------------------------------------------------
[R] Analysis of [2c1a1a2a1], FEN
Arises from 51. Qh7 Ka1 52. Qg7+ Ka2 53. Qf7+ d5 54. Qf2+ Kb1 55. Kf6 d4 56. g6 d3.
Current Assessment (KWR, BBS, SCO-09252.pgn, more KWR today): Black can avoid nearby dangers and draw. But can use more checking for other White tries. The danger level is certainly nontrivial, since Black must run King to d1.
1) 57. g7 Qg4 {KWR; Forced.}
1) 58. Qb6+ Kc1
1) 59. Qc5+
a) 59...Kd1? {KWR; "instructive loss, per Amann's request:-)"}
1) 60. Qg5!
{KWR (9/25): I think White is winning now---not completely sure, but anyway this seems a useful example of the danger Black faces. White's master plan is to worm his way down to capture Black's d-pawn to expose Black's King on d1, and then run to the back rank before Black's King can get back to the corner---note that http://chess.traveller.com/scripts/chess_kt_endings cut-and-paste 8/6P1/8/6Q1/8/3K4/5q2/3k4+b or 8/6P1/1q6/6Q1/8/3K4/8/3k4+b are tablebase losses even without Black's b-pawn.} {LATEST (9/26): looks like Black can be saved; see lines with NEW. IMHO, this actually makes Black breathe a little easier in this crucial line overall.}
a) 60...Qf3+ 61. Ke5 Qe2+ 62. Kd4 {helps White +-}
b) 60...Qd4+
1) 61. Kf5 Qd5+ {or 61...Qc5+} 62. Kf4
a) 62...Qd5+ 63. Kf3 +-
b) 62...Qb4+ 63. Kf3 +-
c) 62...Qc4+ 63. Kf3 {transposes to e)}
d) 62...Qd6+ 63. Ke3 {transposes to e)}
e) 62...Qc7+ 63. Kf3 Qc6+
{Still stopping Ke3, but White's point now is
that he will get to g3 when Black cannot check
on e1 or g1.}
64. Kg3 Qc7+ {or 64...Qd6+} 65. Kg2 Qc6+
66. Kg1 Qb6+ 67. Kf1 +-
f) 62...Qg8! {NEW--[JQB, wp/74096]. I thought
this "unhealthy", but it seems to hold--KWR}
1) 63. Ke3 d2
1) 64. Kd3 Qb3+ = {jqb}
2)@64. Qg1+ Kc2 65. Qc5+ Kd1 =
{White cannot improve his position,
partly because Black controls c4
and a2. KWR}
2) 63. Qg1+ Kc2 64. Qc5+ Kb3 {jqb; IMHO this
is an important idea. Since White cannot
get his Q back to the g-file with tempo,
there seem to be just two tries left. And
BTW, 64...Kb2/b1 might be even better.-KWR}
1) 65. Qf8 Qc4+ 66. Ke3 {Kg3 no better}
66...d2! 67. Kxd2 Qany+ EGTB=.
{These hold even with White Q on
f7 or g5, so it's safe enough.}
2) 65. Qb6+ Kc2 66. Qc7+
a) 66...Kb1/2/3?! 67. Ke3
a) 67...d2? 68. Kxd2 EGTB+-
b) 67...Qb3!? 68. Qd7 Qb6+!
69. Kd2 Qb4+ 70. Kxd3 Qb3+ EGTB=
b) 66...Kd1 {!---I see no progress
for White. KWR}
1) 61. Kg6 {trying keep Black out of g8} Qe4+!
1) 62. Kh5 Qh7+ {hiding on g8 again}
2) 62. Kh6 Qe6+ 63. Kh7 {else ...Qg8!?} Qe4+
63. Qg6 Qh4+ 64. Kg8 d2 =.
{So the "instructive loss" may be a draw, but still /instructive/, IMHO}
b) 59...Kb1! {KWR: looks OK, w help from Amann,BBS,SCO}
1) 60. Qd5 {KWR: frightened me for a moment---look
out for moves like this.}
a) 60...Qf4+ {CLAIM: perpetual, because...}
1) 61. Ke6 Qg4+ 62. Kf7 Qf4+ 63. Ke8 Qa4+
64. Kd8 Qh4+ {...because we use the whole
board! Amann} =Draw
2) 61. Kg6 Qg4+ 62. Kf7 = {transposes to 61. Ke6}
b) 60... d2 61. Qxd2 Qf3+ {CLAIM: perp--easy to see}
2) 59. Qc7+
a) 59...Kd1?! {IMHO, may be OK still, but notice that it
helped to ditch Black's b-pawn in c). --KWR}
b) 59...Kb1 {Transposes to 59...Kb2}
c) 59...Kb2 {seems best to try to eliminate our b7 pawn}
1) 60. Qxb7+ Kc2 {or 60...Kc1}
1) @61. Qc6+ Kb1! {61...Kd1? 62. Qd5! may work}
2) 61. Qc7+ Kd1 ***CRITICAL POSITION [R.1]
3) 59. Kf7 d2! = {KWR; jqb; BBS...}
------------------------------------
Analysis of CRITICAL POSITION [R.1]: FEN 8/2Q3P1/5K2/8/6q1/3p4/8/3k4+w
{KWR: Black must run in front of the pawn, as 61...Kb2 loses to 62. Qb8+,
and in view of the 59. Qc1+ Kd1? loss, you can understand my original
trepidation about that. However, Spy49 and others on the BBS took this
further and claimed that all White has is "sound and fury".
Now today 9/25 I see SCO see more danger in 62. Qf7 than I did, and the
"drawing perimeter" isn't as obvious as I originally thought.
White's winning plan is the same as in the "instructive loss" above.
Current assessment (9/26 9pm EDT) /Drawn/.
1) 62. Qf7 Qf4+ 63. Kg6
a) 63...Qe4+ {SCO?} 64. Qf5 Qg2+ {...Qc4!? [JQB,lq/74111]}
1) 65. Kh7 Qh2+
1) 66. Kg6 Qg2+ {"=" SCO---not sure, KWR}
2) 66. Kg8 d2 67. Kf7
a) 67...Ke1 68. g8=Q d1=Q
1) 69. Qe4+ {4Q!}
a) 69...Qde2!
1) 70. Qb4+ Kf1 71. Qb1+ Qe1
72. Qd3+ Qee2 =Draw
2) 70. Qxe2+ Qxe2 =Draw
b) 69...Qhe2? 70. Qg3+ Kd2 71. Qb4+ Kc1
72. Qga3+ Kc2 73. Qac3 Mate!
2) 69. Qe8+!?
{"leads to mate" [JQB,lq/74111]; KWR: how?]}
b) 67...Qc7+ 68. Kf6 Qd6+ 69. Qe6 Qxe6+
70. Kxe6 Kc1 71. g8=Q d1=Q =Draw
2)! 65. Kg5 {IMHO, may transpose into my b) lines anyway.--KWR}
3) 65. Kh6 d2 66. Qb1+ Ke2 67. Qb5+ Ke1 68. Qe8+
a) 68...Qe2? 69. g8=Q d1=Q 70. Qg3+ +-
b) 68...Kf1!
1) 69. Qd8
a) 69...Qh3+ 70. Kg5 Qg3+ 71. Kh6 Qh3+ 72. Kg6 Qg4+
73. Kf7 d1=Q 74. Qxd1+ Qxd1 75. g8=Q Qd5+ =Draw
b) 69...Qe2 {"easier"- [JQB,lq/74111]} =
2) 69. Qb5+ Ke1 70. Qe5+ Kf1 71. Qf5+ Ke1 =
3) 69. g8=Q Qxg8 70. Qxg8 d1=Q =Draw
b)! 63...Qg3+!
1) 64. Kh6 Qe3+ {the point: White cannot interpose} 65. Kh7 Qh3+
66. Kg8 d2 = {Must be =; White doesn't even have a check!}
2) 64. Kf5
a) 64...Qf3+?! 65. Ke6 {Now while Black can still draw
because when White approaches Black's d-pawn with Kd4,
Black can arrange to check on b4 or b2, since NN. Kxd3 Qd2+!
is an EGTB draw /8/5QP1/8/8/6q1/3K4/8/3k4+b; and if White
touches it from e4, then ...Qe1+! holds. But better is:}
b) 64...Qf2+! 65. Ke6 Qa2+! 66. Ke7 Qa7+ {nice to get rid
of the b-pawn!} 67. Kf8 Qa8+ 68. Qe8 Qf3+ {CLAIM: Black
has a perpetual or forces White to play the fruitless Kg8.}
2) 62. Kf7!? Qf5+ {CLAIM: Black delivers perpetual check or equalizes}
1) 63. Ke8 Qg6+!
1) 64. Kf8 Qf8+ 65. Qf7 {65. Kg8 d2 =} ...Qd8+
66. Qe8 Qf6+ 67. Kg8 d2=
2) 64. Qf7 Qc6+
1) 65. Kf8 Qc8+ 66. Qe8 Qf5+ 67. Ke7 Qe5+ =
2) 65. Ke7 Qc5+ 66. Ke6 Qc4+ 67. Kf6 Qf4+
{transposes to 62. Qf7 ---!}
3) 65. Kd8 Qa8+ 66. Ke7 Qa7+ = {transposes to 62. Qf7}
3) 64. Kd8 d2! =
2) 63. Ke7 Qg5+ 64. Ke6 d2! =
-----end of R.1 analysis, back to position R.
2) 58. Qe1+ Kc2
1) 59. Qe6 Qxe6+ 60. Kxe6 d2 61. g8=Q d1=Q 62. Qc8+ =Draw
2) 59. Qe8 d2 60. g8=Q Qxg8 61. Qxg8 d1=Q 62. Qc8+ =Draw
2) 57. Qf5 {KWR}
a) 57...Qc2 {!--steni, others} 58. g7 d2
1) 59. Qxc2+ Kxc2 60. g8=Q d1=Q 61. Qg2+ =Draw
2) 59. Qb5+ Qb2+ 60. Qxb2+ Kxb2 61. g8=Q d1=Q 62. Qg2+ =Draw
b) 57... Qb3 {KWR; also seems good enough}
58. g7 Qb6+ {CLAIM: perpetual} 59. Kg5 Qg1+ 60. Kh6 Qh2+ 61. Kg6 Qg3+
62. Kh7 Qh4+ 63. Kg8 Qd8+ 64. Qf8 Qd5+ =
3) 57. Qb6+ Kc1 58. Qc5+ Qc2 = {KWR; looks clear}
4) 57. Qg2 d2 58. g7 Qc2 59. Qxb7+ 60. g8=Q d1=Q =Draw
{Can there possibly be any other dangerous tries for White here? KWR, 9/26}
--------------------------------------------------------------
---------
[X] Analysis of [1d1a1a], FEN 8/5K2/3p2P1/1p5q/k7/4Q3/8/8+w
51. Qh7 b5 52. Kf6+ Ka2 53. Qh2+ Kb3 54. Qf2 Qa1+ 55. Kf7 Qe5 56. g6 Qh5
57. Kf6 Qe5+ 58. Kf7 Qh5 59. Qe3+ Ka4 {note that White's 57th is unnecessary}
By: [JL, wp/72744], taken verbatim from
http://bbs.msnbc.com/bbs/kasparov-team/posts/wp/72744.asp
"
60. Kf6 Qh4+ 61. Kf7 Qh5 62. Qd4+ (to prevent ?Qe5+ and ?Qh5+)
62. ... b4 63. Kf6 Qh6 64. Qa7+ Kb3 65. Qg7 Qxg7 66. Kxg7 Ka3 67. Kh6 b6
IF 62. Qe4+ (to protect the g-pawn) ..b4 63. Ke7 Qg5+ 64. Kd7 Ka3.
IF 63. Kf8 Qh8+ 64. Ke7 Qg7+ 65. Kxd6 Ka3.
------------------------------------------------------------------------
ANALYSIS OF ***CRITICAL EARLY POSITION [Y][2d1c1a1a]
A scary loss in Qh7 b5 Kf6+ Kb2
Ross Amann yt/74202.asp
1cust48.tnt3.holmdel.nj.da.uu.net
Sun Sep 26 12:23:04
I thought this line was safe - it still might be (see alternate moves
on 59. and 60.). But I found a win vs. "normal play"
51.Qh7 b5 52.Kf6+ Kb2 53.Qh2+ Ka1 54.Qf4 b4! (d5 loses) 55.Qxb4 Qf3+
56.Kg7 d5 57.Qd4+ Kb1 58.g6 Qe4 59.Qb6+ Kc2 (Ka1; Ka2; Kc1) 60.Kf7
d4?! (Qf5+; Qf3+; Qf4+) 61.g7+- Qf5+ (Qf4+ 62.Qf6 and Qf3+ 62.Qf6
lose similarly to main line) 62.Qf6 Qd7+ 63.Kg6 Qe8+ 64.Kh7 Qd7
65.Kh6 Qh4+ 66.Kg6 Qg3+ (Qg4+ 67.Qg5 Qe6+ 68.Kh7 Qd7 69.Qg2+ Kc3
70.Kh8+-; Qg2+ 67.Qg5 Qc6+ 68.Kh7 Qc7 69.Kh6 Qh2+ 70.Qh5 Qf4+ 71.Kh7
Qc7 72.Kh8+-) 67.Qg5 Qd6+ 68.Kf5 Qd5+ 69.Kf4 Qg8 70.Qc5+ Kb2 71.Qf8+-
--Ken Regan
[Amann9/22, qq/72088] http://bbs.msnbc.com/bbs/kasparov-team/posts/qq/72088.asp
[Amann9/23, bk/72593] http://bbs.msnbc.com/bbs/kasparov-team/posts/bk/72593.asp
[AvO9/22, uq/72092] http://bbs.msnbc.com/bbs/kasparov-team/posts/uq/72092.asp
[Fritz9/22, rx/72271] http://bbs.msnbc.com/bbs/kasparov-team/posts/rx/72271.asp
[HC9/22, xd/72433] http://bbs.msnbc.com/bbs/kasparov-team/posts/xd/72433.asp
[IK9/22, up/72066] http://bbs.msnbc.com/bbs/kasparov-team/posts/up/72066.asp
[IM2429/21, lc/71719] http://bbs.msnbc.com/bbs/kasparov-team/posts/lc/71719.asp
[JL9/23, wp/72744] http://bbs.msnbc.com/bbs/kasparov-team/posts/wp/72744.asp
[KWR9/17, xi/69183] http://bbs.msnbc.com/bbs/kasparov-team/posts/xi/69183.asp
[KWR9/19, jg/70469] http://bbs.msnbc.com/bbs/kasparov-team/posts/jg/70469.asp
[KWR9/24, jo/73381] http://bbs.msnbc.com/bbs/kasparov-team/posts/jo/73381.asp
[KWR9/24, jp/73407] http://bbs.msnbc.com/bbs/kasparov-team/posts/jp/73407.asp
[KWR9/24, wq/73446] http://bbs.msnbc.com/bbs/kasparov-team/posts/wq/73446.asp
[SCO9/22, yj/72590] http://bbs.msnbc.com/bbs/kasparov-team/posts/yj/72590.asp
[Spy9/18, ww/69546] http://bbs.msnbc.com/bbs/kasparov-team/posts/ww/69546.asp
[Spy9/22, pq/72087] http://bbs.msnbc.com/bbs/kasparov-team/posts/pq/72087.asp
[Spy9/22, jr/72107] http://bbs.msnbc.com/bbs/kasparov-team/posts/jr/72107.asp
[Ulf9/22, so/72038] http://bbs.msnbc.com/bbs/kasparov-team/posts/so/72038.asp