Intrinsic Performance Ratings from the 2014 US Championships. Player error bars are +-150 to +-200 for "95% confidence of measurement" Owing to large error bars, IPR's should be rounded to nearest 10 (at best 5). This version of IPR still measures mostly accuracy, not complexity/challenge. Player FIDE Elo IPR vsIPR Diff Score V. Akobian 2643 2877 2604 +273 +3 S. Erenburg 2633 2640 2791 -151 -2 J. Friedel 2505 2519 2478 + 41 = T. Gareev 2653 2588 2522 + 66 -2 G. Kamsky 2713 2700 2694 + 6 +3 A. Lenderman 2582 2765 2541 +224 +3 M. Molner 2522 2474 2862 -388 -4 D. Narodnitsky 2543 2723 2741 - 28 +1 A. Onischuk 2668 2617 2813 -196 = A. Ramirez 2595 2589 2641 - 52 -3 R. Robson 2631 2685 2593 + 92 = S. Shankland 2634 2762 2755 + 7 +1 Whole tourney 2610.17 2657 +- 56 Player FIDE Elo IPR vsIPR Diff Score T. Abrahamyan 2366 2644 2306 +338 +4 C. Baginskaite 2267 1899 2486 -587 -6 A. Eswaran 1979 2291 2318 - 27 -2 S. Foisor 2238 2258 2408 -150 -1 I. Krush 2489 2570 2363 +207 +4 A. Melekhina 2151 2464 2300 +164 -1 K. Nemcova 2282 2407 2339 + 68 +1 V. Ni 2206 2251 2486 -235 -2 A. Zatonskih 2469 2660 2367 +293 +4 I. Zenyuk 2249 2479 2536 - 57 -1 Whole tourney 2269.6 2387 +- 80 A note on the error bars, and statistical confidence in general: When you have a little more than 20 independent data points, you should /expect/ one of them to lie outside your "95% error bars". And a few others will be close to the boundary. Maybe the "one" is Alisa Melekhina, who otherwise shows as having been distinctly unlucky to go 4-5 while performing 160 above her opponents and 310 above her rating. Maybe her true measurement would be 2300 for zero difference after all. However one *can* say with much higher confidence that she performed well above her rating, which after all was over 2300 a few years ago. Gareev and Kamsky and Onischuk might be the "others". But when one takes the data as a whole, it coheres well with the game results. One can also conclude with high confidence that both fields rose to the occasion, playing above their ratings---especially the ladies. This may be evidence that greater development efforts would pay off especially with the ladies... Or at least that the CCSCSL is a great place to play.