CCRL 40/15
Downloads and Statistics
May 1, 2021
Testing summary:
Total: 1'240'737 games
played by 2'832 programs

White wins: 425'216 (34.3%)
Black wins: 312'397 (25.2%)
Draws: 503'124 (40.6%)
White score: 54.5%

Free 4-CPU engines

Comparing 349 engines!
86 best versions of selected engines played 11145 games with each other

CCRL 40/15 Rating List — Free 4-CPU engines (Quote)

Ponder off, General book (up to 12 moves), 3-4-5 piece EGTB
Time control: Equivalent to 40 moves in 15 minutes on an Intel i7-4770k.
Computed on May 1, 2021 with Bayeselo based on 1'240'737 games
Please refer to the "about" page for comments on engine inclusion

Color legend: Commercial, Free, Open source, Private.
Bold font - tested with 200 games or more. Normal font - less than 200 games.

RankNameRatingScoreAverage
Opponent
DrawsGamesLOS
Elo+
1Stockfish 13 64-bit 4CPU3549+19−1877.3%−181.445.4%1018 
50.2%
 Stockfish 2021-01-11 64-bit 4CPU3549+19−1975.3%−164.948.6%938
89.5%
 ShashChess 15.0 64-bit 4CPU3530+23−2275.2%−164.449.4%650
75.4%
 SugaR AI 1.00 64-bit 4CPU3519+26−2672.6%−144.853.0%460
57.5%
 Stockfish 12 64-bit 4CPU3515+19−1971.8%−139.656.0%841
95.3%
 Stockfish 2019-10-09 64-bit 4CPU3490+23−2374.7%−156.250.3%616
78.2%
 Stockfish 11 64-bit 4CPU3478+20−1973.0%−143.052.6%840
72.7%
 SugaR NN 1.1 64-bit 4CPU3470+15−1570.8%−131.952.4%1344
78.2%
 Stockfish 10 64-bit 4CPU3461+17−1673.4%−154.950.3%1227
55.1%
 SugaR 1.6.1 64-bit 4CPU3460+25−2569.0%−118.757.4%479
66.6%
 Stockfish 270918 64-bit 4CPU3451+28−2777.9%−188.743.3%457
71.6%
 ShashChess 8.0 64-bit 4CPU3442+15−1565.8%−94.263.7%1206
76.8%
 SugaR XPrO 1.5.3 64-bit 4CPU3431+24−2471.8%−144.051.3%544
54.4%
 Stockfish 9 64-bit 4CPU3429+15−1572.3%−152.850.5%1423
86.4%
2RubiChess 2.1 64-bit 4CPU3411+27−2747.9%+14.269.2%360
55.6%
 SugaR XPrO 1.4 64-bit 4CPU3409+20−2072.3%−150.551.8%840
55.3%
 asmFish 051117 64-bit 4CPU3407+20−1969.8%−130.455.7%819
65.0%
3Igel 3.0.0 64-bit 4CPU3401+22−2247.3%+15.570.0%566
58.6%
 SugaR XPrO 1.2 64-bit 4CPU3397+21−2070.4%−135.952.5%754
53.6%
4SlowChess Blitz 2.5 64-bit 4CPU3396+18−1846.6%+21.164.9%847
59.5%
5Komodo 12 64-bit 4CPU3393+17−1769.2%−125.252.0%1102
54.2%
6Ethereal 12.75 64-bit 4CPU3392+15−1548.7%+9.867.7%1174
51.1%
 Pedone 3.1 64-bit 4CPU3390+92−10026.6%+135.053.1%32
50.3%
 ShashChess Pro 1.0 64-bit 4CPU3390+33−3365.6%−94.461.7%256
59.2%
7Fire 8 64-bit 4CPU3385+17−1748.0%+14.566.1%946
54.6%
8Nemorino 6.00 64-bit 4CPU3384+17−1748.3%+6.561.5%1023
53.8%
 Komodo 11.01 64-bit 4CPU3382+28−2873.4%−155.846.9%416
63.0%
 Nemorino 6.05 64-bit 4CPU3376+23−2344.8%+31.370.6%496
48.3%
 Stockfish 8 64-bit 4CPU3376+14−1365.1%−96.162.1%1647
65.1%
 SugaR XPrO 1.3 64-bit 4CPU3371+23−2266.0%−102.757.4%598
70.4%
 Ethereal 12.25 64-bit 4CPU3362+22−2249.3%+5.971.0%544
53.8%
 Igel 2.9.0 64-bit 4CPU3361+16−1748.2%+13.060.6%1050
53.6%
 Igel 2.8.0 64-bit 4CPU3360+25−2553.6%−16.258.2%457
56.6%
 SlowChess Blitz 2.4 64-bit 4CPU3357+22−2146.2%+26.265.2%598
53.3%
 RubiChess 2.0 64-bit 4CPU3356+20−2042.4%+47.369.8%666
66.9%
 Ethereal 12.00 64-bit 4CPU3349+22−2250.9%−3.468.8%564
58.9%
 Komodo 10 64-bit 4CPU3345+23−2276.6%−172.644.0%700
52.6%
 Ethereal 11.75 64-bit 4CPU3344+21−2147.3%+15.265.0%614
57.1%
 SlowChess Blitz 2.3 64-bit 4CPU3341+20−2043.6%+40.564.9%680
64.2%
9‑10Booot 6.5 64-bit 4CPU3336+22−2236.3%+84.058.7%588
50.7%
9‑10Lc0 0.27.0 w703810 64-bit 4CPU3336+18−1843.8%+36.460.4%906
70.5%
11Xiphos 0.6 64-bit 4CPU3330+13−1340.4%+60.761.5%1744
57.7%
 SlowChess Blitz Classic 2.2 64-bit 4CPU3327+20−2043.7%+37.565.8%704
57.2%
 Stockfish 7 64-bit 4CPU3325+15−1567.0%−106.157.3%1304
55.6%
 Ethereal 11.53 64-bit 4CPU3323+23−2252.3%−13.264.0%542
57.6%
 Fire 7.1 64-bit 4CPU3320+11−1148.6%+9.461.0%2672
84.2%
12RofChade 2.3 64-bit 4CPU3311+14−1438.5%+74.359.5%1456
58.7%
 Xiphos 0.5 64-bit 4CPU3309+20−2046.1%+24.966.7%673
55.4%
 Komodo 9 64-bit 4CPU3306+20−2070.4%−123.452.7%804
60.6%
13Pedone 3.0 64-bit 4CPU3303+18−1837.0%+86.256.7%902
67.9%
 Booot 6.4 64-bit 4CPU3297+15−1538.2%+74.759.8%1337
50.5%
 Ethereal 11.25 64-bit 4CPU3297+21−2246.3%+23.965.5%588
51.5%
 Ethereal 11.00 64-bit 4CPU3296+19−1947.0%+18.463.2%778
62.9%
 RubiChess 1.8 64-bit 4CPU3292+19−1937.9%+73.561.1%808
56.3%
 Stockfish 6 64-bit 4CPU3290+14−1465.3%−94.557.3%1542
55.3%
 RubiChess 1.7.3 64-bit 4CPU3288+20−2048.3%+10.062.4%736
58.5%
14Laser 1.7 64-bit 4CPU3286+13−1340.4%+61.660.3%1823
50.7%
 Fire 6.1 64-bit 4CPU3285+18−1848.5%+8.158.4%940
55.6%
 Komodo 8 64-bit 4CPU3284+16−1669.8%−127.049.0%1298
66.7%
15Defenchess 2.2 64-bit 4CPU3279+14−1441.9%+51.260.2%1417
52.0%
 RofChade 2.202 64-bit 4CPU3278+18−1841.4%+53.359.8%858
63.2%
 SlowChess Blitz Classic 2.1 64-bit 4CPU3273+22−2242.3%+49.855.0%615
51.9%
 Ethereal 10.55 64-bit 4CPU3272+24−2549.8%−1.457.4%488
55.1%
16Fizbo 2 64-bit 4CPU3271+12−1243.3%+41.354.9%2131
60.4%
 Stockfish 5 64-bit 4CPU3268+15−1567.7%−109.654.0%1346
64.2%
 Fire 5 64-bit 4CPU3263+18−1846.9%+18.462.5%867
51.1%
17Schooner 2.2 64-bit 4CPU3263+26−2645.6%+27.960.7%420
56.1%
18Andscacs 0.94 64-bit 4CPU3260+18−1847.2%+18.554.2%907
52.8%
 Booot 6.3.1 64-bit 4CPU3260+15−1543.0%+43.757.4%1366
50.8%
 Andscacs 0.95 64-bit 4CPU3259+16−1643.8%+38.960.8%1071
69.5%
 Fizbo 1.9 64-bit 4CPU3253+17−1745.7%+26.255.5%1004
63.3%
 Xiphos 0.4 64-bit 4CPU3248+19−1943.8%+39.761.1%830
52.2%
 NirvanaChess 2.5 64-bit 4CPU3246+73−7254.8%−32.659.6%52
50.4%
 RofChade 2.1 64-bit 4CPU3246+25−2544.4%+36.860.0%452
69.7%
 Andscacs 0.921 64-bit 4CPU3238+16−1650.7%−6.647.5%1225
52.3%
 Andscacs 0.93 64-bit 4CPU3237+18−1842.9%+45.554.8%938
58.6%
19Wasp 4.50 64-bit 4CPU3234+23−2347.6%+12.662.5%496
53.5%
 Stockfish DD 64-bit 4CPU3232+17−1763.0%−77.856.1%1032
53.9%
20Arasan 22.2 64-bit 4CPU3231+28−2851.9%−12.155.9%372
58.1%
 Andscacs 0.91 64-bit 4CPU3227+22−2242.5%+47.759.2%596
51.5%
21Halogen 10 64-bit 4CPU3226+26−2648.2%+11.466.3%380
49.7%
 Komodo 7a 64-bit 4CPU3226+18−1860.7%−64.659.0%897
50.6%
 RubiChess 1.6 64-bit 4CPU3226+25−2559.5%−58.350.9%466
63.0%
 Andscacs 0.89 64-bit 4CPU3221+21−2145.9%+28.155.0%662
61.0%
 Komodo TCEC 64-bit 4CPU3217+18−1760.7%−67.754.8%971
52.9%
 Arasan 21.4 64-bit 4CPU3215+25−2545.0%+26.755.6%464
51.1%
 Booot 6.2 64-bit 4CPU3215+14−1442.9%+46.359.3%1517
51.1%
 Laser 1.6 64-bit 4CPU3215+16−1643.5%+43.555.2%1124
57.6%
 Schooner 2.1 64-bit 4CPU3212+23−2344.6%+33.555.5%550
52.1%
 Andscacs 0.88 64-bit 4CPU3211+27−2845.0%+31.054.8%387
53.4%
 Komodo 6 64-bit 4CPU3210+17−1758.6%−53.056.7%1065
62.0%
 Andscacs 0.90 64-bit 4CPU3205+24−2450.3%+2.655.1%515
50.7%
 Stockfish 4 64-bit 4CPU3205+16−1660.1%−60.459.1%1086
60.8%
 Komodo 5.1 64-bit 4CPU3201+20−1960.3%−63.154.9%779
57.5%
 Andscacs 0.872 64-bit 4CPU3198+24−2451.3%−4.858.8%476
50.6%
 Schooner 2.0.34 64-bit 4CPU3198+20−2049.3%+3.357.9%734
53.1%
 Fire 4 64-bit 4CPU3197+13−1346.5%+21.959.7%1885
56.9%
 Arasan 21.3 64-bit 4CPU3194+30−3046.7%+25.855.7%314
63.4%
 Ethereal 10.00 64-bit 4CPU3188+20−2053.4%−23.650.8%788
60.2%
22Vajolet2 2.8 64-bit 4CPU3183+28−2847.8%+11.663.5%362
54.0%
 Vajolet2 2.7 64-bit 4CPU3181+24−2451.0%−6.455.8%507
51.6%
23Houdini 1.5a 64-bit 4CPU3180+17−1759.4%−62.245.8%1105
51.3%
 SlowChess Blitz Classic 1.9 64-bit 4CPU3180+27−2753.3%−19.158.0%383
52.2%
24Gull 3 64-bit 4CPU3179+9−942.5%+48.454.2%3783
53.1%
 Fizbo 1.8 64-bit 4CPU3178+20−2043.9%+41.849.3%724
50.3%
25NirvanaChess 2.4 64-bit 4CPU3178+13−1341.8%+55.254.5%1852
53.8%
 Gull 2.8b 64-bit 4CPU3177+19−1949.1%+3.751.8%797
51.3%
 Xiphos 0.3 64-bit 4CPU3177+21−2149.2%+3.154.2%660
57.8%
 RofChade 2.0 64-bit 4CPU3173+21−2149.7%+1.857.7%620
54.6%
26Equinox 3.20 64-bit 4CPU3172+11−1142.2%+50.659.0%2671
56.2%
 Arasan 21.2 64-bit 4CPU3169+30−3052.2%−11.860.6%302
57.6%
 Booot 6.1 64-bit 4CPU3166+20−2042.0%+49.360.3%726
50.8%
 Arasan 21.1 64-bit 4CPU3165+27−2751.2%−7.159.5%383
50.7%
27ChessBrainVB 3.72 4CPU3165+30−3045.0%+30.651.3%320
49.4%
 Stockfish 3 64-bit 4CPU3165+21−2156.0%−35.057.8%663
51.8%
 ChessBrainVB 3.74 4CPU3162+128−13046.9%+18.056.3%16
50.6%
 RubiChess 1.5 64-bit 4CPU3161+29−2952.4%−14.054.3%348
52.2%
 Equinox 3.30 64-bit 4CPU3160+18−1843.9%+39.058.9%896
60.2%
28Critter 1.6a 64-bit 4CPU3158+8−845.3%+31.554.6%5429
69.7%
29Hannibal 1.7 64-bit 4CPU3154+14−1442.3%+47.354.5%1577
59.8%
 NirvanaChess 2.3 64-bit 4CPU3151+18−1841.4%+55.056.8%869
56.0%
 Fire 3.0 64-bit 4CPU3149+17−1749.5%+2.358.2%948
53.4%
30Bouquet 1.8 64-bit 4CPU3148+11−1143.6%+41.156.7%2427
50.6%
 Critter 1.4 64-bit 4CPU3148+18−1758.2%−51.354.6%983
50.9%
 Nemorino 5.00 64-bit 4CPU3147+18−1848.1%+10.452.3%878
55.1%
 Stockfish 2.2.2 64-bit 4CPU3146+16−1659.2%−56.753.4%1141
52.8%
 Andscacs 0.86 64-bit 4CPU3145+20−2042.8%+46.453.9%761
51.7%
 Critter 1.2 64-bit 4CPU3144+20−2058.9%−54.952.9%762
59.6%
 Gull 2.3 64-bit 4CPU3141+17−1747.4%+14.859.3%982
48.9%
 Laser 1.5 64-bit 4CPU3141+20−2049.4%+8.454.5%723
50.5%
 Stockfish 2.3.1 64-bit 4CPU3141+19−1955.4%−33.052.5%846
55.4%
31Texel 1.07 64-bit 4CPU3139+14−1449.3%+6.749.2%1636
53.7%
 NirvanaChess 2.2 64-bit 4CPU3138+17−1741.5%+55.657.4%1001
50.2%
 Pedone 1.8 64-bit 4CPU3138+28−2846.7%+19.057.4%350
51.9%
32Protector 1.9.0 64-bit 4CPU3138+15−1546.4%+24.153.9%1338
56.3%
33Alfil 15.7 64-bit 4CPU3136+17−1742.9%+47.956.3%1006
49.3%
 Wasp 3.75 64-bit 4CPU3136+28−2849.1%+2.657.2%376
53.5%
 Vajolet2 2.6.1 64-bit 4CPU3134+21−2150.8%−4.360.3%605
55.0%
 Andscacs 0.85 64-bit 4CPU3132+25−2543.9%+42.753.1%467
50.8%
 Igel 2.3.1 64-bit 4CPU3132+27−2750.2%−2.453.2%406
52.5%
 Bouquet 1.5 64-bit 4CPU3131+23−2346.4%+20.263.6%500
50.0%
 Sting SF 6 64-bit 4CPU3131+28−2850.8%−6.861.0%354
51.0%
 Sting SF 4.8.4 64-bit 4CPU3130+29−2953.3%−20.762.4%330
49.5%
 Texel 1.06 64-bit 4CPU3130+20−2046.1%+25.753.6%739
59.3%
 DeepSaros 4.1.6 64-bit 4CPU3126+26−2645.2%+29.157.5%419
51.4%
 Pedone 1.9 64-bit 4CPU3126+28−2849.4%+0.955.4%354
50.6%
 Stockfish 2.0.1 64-bit 4CPU3125+24−2456.4%−40.248.6%514
51.7%
 Wasp 3.60 64-bit 4CPU3124+33−3345.6%+26.550.4%264
52.5%
 Protector 1.8.0 64-bit 4CPU3123+28−2850.4%−1.654.7%386
51.5%
 ChessBrainVB 3.68 4CPU3122+26−2649.2%+4.551.6%428
50.3%
 Gull 3.1 64-bit 4CPU3122+30−3045.4%+33.545.1%359
51.0%
34iCE 4.0 64-bit 4CPU3122+26−2647.0%+14.552.6%420
50.4%
35BlackMamba 2.0 64-bit 4CPU3121+15−1544.2%+38.354.3%1408
57.7%
 Arasan 20.4.1 64-bit 4CPU3119+25−2651.7%−11.050.2%452
49.1%
 Fizbo 1.7 64-bit 4CPU3119+27−2756.1%−38.752.2%410
54.8%
 Elektro 1.2 64-bit 4CPU3117+23−2346.1%+26.855.5%546
51.1%
 Sting SF 5 64-bit 4CPU3116+25−2548.1%+12.954.0%465
55.3%
 Stockfish 1.9.1 64-bit 4CPU3114+22−2260.1%−68.946.9%657
55.7%
 IvanHoe 9.46h 64-bit 4CPU3112+14−1453.2%−19.359.5%1542
51.4%
 Stockfish 2.1.1 64-bit 4CPU3112+27−2754.7%−29.648.3%406
52.9%
 RobboLito 0.21Q 64-bit 4CPU3110+22−2250.9%−5.762.7%569
53.6%
 Hannibal 1.5 64-bit 4CPU3109+19−1953.2%−20.657.1%819
53.1%
 Sting SF 3 64-bit 4CPU3108+21−2147.7%+11.558.5%644
51.3%
 Bouquet 1.6 64-bit 4CPU3107+21−2150.0%−0.060.7%641
51.4%
36Senpai 2.0 64-bit 4CPU3107+19−1950.6%−6.148.5%860
50.5%
 Sting SF 2 64-bit 4CPU3107+27−2748.8%+7.958.1%375
49.1%
 Sting SF 9 64-bit 4CPU3107+28−2848.0%+10.947.2%381
49.8%
 Stockfish 1.8 64-bit 4CPU3107+18−1860.4%−70.450.6%942
51.8%
37Winter 0.7 64-bit 4CPU3106+25−2645.1%+31.947.1%463
53.6%
 ChessBrainVB 3.66 4CPU3105+28−2854.2%−27.548.7%378
53.5%
 Andscacs 0.83 64-bit 4CPU3103+29−2946.6%+18.651.2%338
50.4%
 Stockfish 1.7.1 64-bit 4CPU3103+19−1960.4%−68.552.6%882
54.0%
 Xiphos 0.2.2 64-bit 4CPU3101+26−2647.3%+14.053.6%414
53.0%
 Wasp 3.50 64-bit 4CPU3100+19−1950.4%−5.353.6%785
56.9%
 Gull 2.2 64-bit 4CPU3097+25−2544.5%+31.054.8%469
52.4%
 Vajolet2 2.5 64-bit 4CPU3096+24−2451.5%−10.054.0%493
54.9%
38Naum 4.6 64-bit 4CPU3094+14−1448.1%+11.654.3%1544
50.6%
 Nemorino 4.00 64-bit 4CPU3094+22−2250.0%+1.052.9%624
49.0%
 NirvanaChess 2.1c 64-bit 4CPU3094+22−2345.2%+31.247.7%608
51.9%
 Sting SF 4 64-bit 4CPU3093+23−2341.9%+49.348.9%562
62.6%
 Arasan 20.3 64-bit 4CPU3087+32−3252.5%−20.447.4%302
51.7%
 Critter 1.01 64-bit 4CPU3086+27−2746.1%+22.154.8%385
48.3%
 Laser 1.4 64-bit 4CPU3086+19−1949.6%+0.945.7%843
53.8%
 Pedone 1.7 64-bit 4CPU3085+19−1948.2%+11.556.4%801
56.3%
 Texel 1.05 64-bit 4CPU3083+17−1747.3%+18.851.4%1016
55.6%
 Andscacs 0.82 64-bit 4CPU3081+29−2950.6%−3.255.2%330
57.1%
 Critter 0.90 64-bit 4CPU3077+31−3147.6%+13.146.5%316
52.1%
 Andscacs 0.81 64-bit 4CPU3076+31−3148.7%+5.349.3%300
49.4%
 Hannibal 1.4b 64-bit 4CPU3076+15−1542.3%+47.351.3%1332
57.2%
 Protector 1.7.0 64-bit 4CPU3074+19−1944.1%+36.450.6%834
52.1%
 Demolito 2019-04-27 64-bit 4CPU3072+66−6650.0%−0.538.9%72
50.4%
39Amoeba 3.1 64-bit 4CPU3071+34−3442.1%+48.749.6%254
52.0%
 Nemorino 3.0 64-bit 4CPU3070+27−2747.9%+13.246.1%427
51.5%
 Protector 1.6.0 64-bit 4CPU3070+21−2243.2%+44.050.2%656
52.4%
40Rodent III 0.238 64-bit 4CPU3069+20−2047.2%+14.550.0%742
54.3%
 Rodent III 0.276 64-bit 4CPU3067+29−2949.6%+3.058.2%337
52.5%
 RubiChess 1.3 64-bit 4CPU3065+22−2252.8%−17.544.2%642
54.9%
 Defenchess 1.1f 64-bit 4CPU3064+19−1851.7%−12.245.3%916
49.2%
41Demolito 2018-10-29 64-bit 4CPU3064+30−3048.6%+5.451.9%322
56.2%
42Topple 0.7.5 64-bit 4CPU3061+28−2851.7%−11.345.9%386
53.3%
 Wasp 3.0 64-bit 4CPU3059+25−2551.1%−8.455.0%462
55.7%
 Texel 1.04 64-bit 4CPU3057+21−2143.1%+42.747.8%722
54.4%
 Alfil 15.8 64-bit 4CPU3055+22−2253.9%−24.347.9%631
50.7%
 NirvanaChess 2.0a 64-bit 4CPU3055+30−3044.7%+35.650.1%337
50.5%
 Protector 1.5.0 64-bit 4CPU3054+18−1842.5%+48.147.4%952
55.8%
 Amoeba 3.0 64-bit 4CPU3052+26−2654.8%−32.444.8%466
51.6%
 Pedone 1.6 64-bit 4CPU3051+23−2349.5%+3.457.7%508
54.6%
 Ethereal 9.00 64-bit 4CPU3049+23−2346.8%+19.245.1%570
65.1%
 Arasan 19.2 64-bit 4CPU3041+31−3151.0%−5.954.8%305
51.3%
 Vajolet2 2.2 64-bit 4CPU3041+27−2747.0%+15.048.7%423
49.1%
 Vajolet2 2.4 64-bit 4CPU3041+19−1947.2%+18.545.7%878
60.5%
 Wasp 2.6 64-bit 4CPU3038+18−1848.9%+7.847.2%968
50.8%
 Gull R375 64-bit 4CPU3037+22−2243.4%+37.757.4%605
53.6%
 Stockfish 1.6.3 64-bit 4CPU3036+22−2257.5%−49.845.3%651
57.8%
 Critter 0.80 64-bit 4CPU3032+31−3050.9%−8.348.3%321
50.7%
 Hannibal 1.3 64-bit 4CPU3032+22−2243.0%+42.848.6%642
50.3%
 Pedone 1.5 64-bit 4CPU3032+31−3149.5%+3.051.6%304
52.7%
 Wasp 2.01 64-bit 4CPU3030+30−3055.3%−31.954.5%321
55.3%
 Arasan 20.0 64-bit 4CPU3027+30−3047.4%+16.753.4%328
51.6%
 Vajolet2 2.3 64-bit 4CPU3026+31−3145.2%+25.853.5%303
53.9%
43Bobcat 8.0 64-bit 4CPU3025+21−2148.3%+10.853.5%636
50.3%
44Pirarucu 2.7.4 64-bit 4CPU3024+20−2053.6%−26.847.6%735
52.7%
 Pirarucu 2.9.5 64-bit 4CPU3023+33−3350.0%−2.153.2%269
51.5%
 Andscacs 0.80 64-bit 4CPU3022+31−3150.2%−1.146.7%317
49.8%
 Senpai 1.0 64-bit 4CPU3022+16−1646.2%+21.453.5%1095
69.7%
45Rybka 2.3.2a 64-bit 4CPU3017+13−1362.8%−86.343.9%1928
56.8%
46Spike 1.4 Leiden 4CPU3015+11−1145.2%+29.547.7%2862
49.7%
 Winter 0.6 64-bit 4CPU3015+32−3253.0%−27.435.6%329
55.3%
47Crafty 25.2 64-bit 4CPU3013+16−1648.5%+9.042.5%1279
51.7%
48chess22k 1.10 64-bit 4CPU3012+22−2246.7%+16.643.7%680
53.1%
 Arasan 19.0.1 64-bit 4CPU3011+31−3151.3%−12.440.9%318
49.4%
 Nemorino 2.00 64-bit 4CPU3011+30−3047.0%+16.359.6%302
55.2%
49Cheng 4.39 64-bit 4CPU3009+15−1549.4%+3.948.6%1333
48.6%
 Laser 1.3 64-bit 4CPU3009+29−3047.2%+15.855.8%321
50.7%
 Texel 1.03 64-bit 4CPU3009+31−3150.3%−1.347.0%313
66.9%
 Pedone 1.4.1 64-bit 4CPU2999+31−3148.5%+8.355.7%305
52.7%
 Vajolet2 2.1 64-bit 4CPU2998+25−2550.9%−4.048.5%462
54.3%
 Rodent III 0.210 64-bit 4CPU2996+28−2845.1%+32.542.5%402
57.4%
 Fizbo 1.5 64-bit 4CPU2992+27−2752.6%−16.448.5%410
68.0%
50Scorpio 2.8 64-bit 4CPU2983+25−2548.8%+6.846.3%492
53.5%
 Protector 1.4.0 64-bit 4CPU2981+19−1942.5%+49.642.9%912
55.1%
 Cheng4 0.38 64-bit 4CPU2979+24−2446.0%+23.842.4%531
53.6%
 Bobcat 7.6 64-bit 4CPU2978+31−3148.6%+8.641.8%318
59.5%
 Rybka 2.2 64-bit 4CPU2973+20−1962.8%−87.441.2%879
51.5%
 Arasan 18.3 64-bit 4CPU2972+30−3046.6%+20.946.8%327
54.8%
 Arasan 18.2 64-bit 4CPU2970+28−2851.9%−15.150.3%388
48.6%
51EXchess 7.97b 64-bit 4CPU2970+18−1747.4%+18.945.9%1017
57.9%
52Spark 1.0 64-bit 4CPU2968+13−1345.0%+32.146.6%1787
49.6%
 Stockfish 1.5.1 64-bit 4CPU2968+25−2553.7%−23.047.7%495
63.6%
 Demolito 2017-08-26 64-bit 4CPU2962+21−2140.2%+63.840.8%748
49.8%
 Winter 0.5 64-bit 4CPU2962+26−2650.4%−5.138.3%470
53.3%
 Protector 1.3.6 64-bit 4CPU2961+32−3246.6%+18.344.3%307
58.1%
 EXchess 7.88b 64-bit 4CPU2956+29−2945.4%+29.748.6%356
49.3%
53Toga II 4.0 64-bit 4CPU2956+18−1941.4%+57.440.4%958
54.5%
 Fizbo 1.31 64-bit 4CPU2954+30−2951.1%−6.241.9%358
61.5%
 Crafty 25.0 64-bit 4CPU2948+25−2548.1%+13.347.9%468
54.6%
 Stockfish 1.4 64-bit 4CPU2947+17−1754.2%−29.142.2%1131
55.4%
 Scorpio 2.7.9 64-bit 4CPU2945+22−2246.7%+20.640.5%659
59.8%
54Gaviota 1.0 64-bit 4CPU2941+16−1647.3%+16.545.4%1256
52.3%
55Tucano 7.07 64-bit 4CPU2940+33−3351.5%−9.844.7%291
51.9%
 EXchess 7.51b 64-bit 4CPU2939+32−3249.5%+5.045.6%296
51.7%
56The Baron 3.44 64-bit 4CPU2938+28−2846.8%+20.845.3%402
58.5%
 Arasan 17.5 64-bit 4CPU2934+27−2748.4%+9.845.1%406
49.0%
57Marvin 3.3.2 64-bit 4CPU2934+36−3743.4%+40.444.7%228
55.1%
 EXchess 7.71b 64-bit 4CPU2931+28−2853.3%−22.643.2%403
50.6%
 Fizbo 1.4 64-bit 4CPU2931+28−2845.9%+24.944.7%394
49.1%
 Spark 0.4 64-bit 4CPU2931+21−2143.0%+49.045.2%703
52.2%
 Bobcat 7.1 64-bit 4CPU2930+31−3147.5%+16.345.9%314
50.6%
 Ethereal 8.62 64-bit 4CPU2930+22−2244.2%+35.649.7%600
58.9%
 Spark 0.3 64-bit 4CPU2926+23−2346.5%+20.649.7%572
52.0%
 Arasan 18.0 64-bit 4CPU2925+29−2947.2%+15.941.5%378
50.4%
58Thinker 5.4d Inert 64-bit 4CPU2925+22−2246.0%+24.249.7%587
57.9%
 Thinker 5.4c Inert 64-bit 4CPU2922+15−1548.1%+13.239.4%1502
53.1%
 Marvin 3.2.0 64-bit 4CPU2921+21−2153.7%−26.343.0%698
58.7%
 Toga II 3.0 4CPU2918+22−2345.6%+26.849.0%592
59.8%
59DisasterArea 1.65 64-bit 4CPU2914+21−2144.2%+35.846.1%709
55.6%
60Gogobello 2.0 64-bit 4CPU2911+25−2550.8%−6.639.1%522
56.5%
 Crafty 23.8 64-bit 4CPU2908+32−3245.8%+27.247.0%287
58.6%
 Thinker 5.4a Inert 64-bit 4CPU2903+23−2347.3%+20.345.4%560
50.8%
 Toga II 1.4.1SE 4CPU2903+13−1348.5%+10.841.6%2041
51.2%
 Asymptote 0.6 64-bit 4CPU2902+95−9548.3%+2.756.7%30
49.9%
 The Baron 3.41 64-bit 4CPU2902+20−2039.1%+70.643.8%800
62.6%
 Cheng4 0.36c 64-bit 4CPU2896+30−3048.8%+6.046.6%326
50.9%
61‑63Bright 0.4a 4CPU2895+15−1547.4%+17.341.1%1495
52.6%
61‑63Glaurung 2.2 64-bit 4CPU2895+16−1647.0%+18.740.7%1259
49.2%
61‑63Tornado 6.0 64-bit 4CPU2895+26−2645.5%+27.443.3%469
51.5%
 Tornado 8.0 64-bit 4CPU2894+19−1945.2%+30.839.0%881
54.4%
 Tornado 7.0 64-bit 4CPU2892+25−2545.3%+31.239.2%502
56.4%
 Bright 0.5c 4CPU2890+23−2347.2%+18.942.9%616
56.9%
64Octochess r5506 64-bit 4CPU2887+21−2144.5%+35.746.7%715
56.1%
65MinkoChess 1.3 64-bit 4CPU2885+21−2146.0%+24.143.7%725
51.1%
 Toga II 1.4 beta5c 4CPU2884+18−1851.7%−11.745.8%996
49.6%
 Tornado 4.88 64-bit 4CPU2884+26−2646.0%+24.941.5%479
60.8%
 Fruit Reloaded 3.2.1 64-bit 4CPU2880+18−1838.8%+74.639.1%1024
49.1%
 Pedone 1.3 64-bit 4CPU2880+29−2946.6%+20.551.0%355
56.5%
 Crafty 24.1 64-bit 4CPU2877+31−3243.5%+41.339.1%322
56.8%
 Scorpio 2.7.6 64-bit 4CPU2873+26−2647.4%+17.144.0%445
64.4%
 Glaurung 2.1 64-bit 4CPU2867+19−1942.8%+51.141.3%946
53.8%
 Bobcat 6.4b 64-bit 4CPU2866+27−2748.3%+11.146.5%415
52.3%
 The Baron 3.29 64-bit 4CPU2865+25−2546.3%+22.343.1%489
51.5%
 EXchess 7.18b 64-bit 4CPU2864+33−3347.3%+16.438.4%292
59.8%
 Gaviota 0.86 64-bit 4CPU2859+24−2453.4%−26.732.6%617
49.3%
 Scorpio 2.7.5 64-bit 4CPU2859+33−3345.7%+24.750.0%266
53.7%
 Arasan 16.3 64-bit 4CPU2857+34−3449.1%+4.340.2%276
49.0%
 Crafty 23.4 64-bit 4CPU2857+34−3446.9%+19.835.7%272
56.7%
66Monolith 1.0 64-bit 4CPU2854+21−2248.6%+8.043.0%693
48.7%
 Scorpio 2.7.7 64-bit 4CPU2854+32−3242.9%+45.241.3%310
54.2%
67Counter 3.2 64-bit 4CPU2852+32−3250.7%−4.840.2%301
57.0%
 Igel 1.9.0 64-bit 4CPU2848+31−3241.0%+59.339.5%324
60.5%
68Shield 2.1 64-bit 4CPU2843+24−2448.7%+9.336.0%594
51.4%
69Cheese 2.0 64-bit 4CPU2842+30−3045.8%+26.239.2%355
60.3%
70‑71BugChess2 1.9 64-bit 4CPU2837+21−2143.4%+44.438.2%738
50.2%
70‑71Loop 13.6 (Loop 2007) 64-bit 4CPU2837+19−1948.3%+12.042.8%894
51.7%
 Crafty 23.3 64-bit 4CPU2836+31−3241.5%+55.438.2%325
64.7%
 Bright 0.3a 4CPU2829+18−1842.4%+51.041.8%988
52.6%
 Glaurung 2.0.1 64-bit 4CPU2828+17−1743.8%+38.943.5%1100
65.7%
 Octochess r5190 64-bit 4CPU2822+24−2445.9%+23.944.5%555
57.2%
 Pedone 1.1 64-bit 4CPU2818+31−3153.7%−31.539.5%347
51.6%
 Arminius 2018-12-23 64-bit 4CPU2817+44−4444.2%+40.936.4%165
53.7%
72Jonny 4.00 4CPU2815+25−2543.6%+42.135.0%540
70.9%
 Bright 0.2c 4CPU2805+21−2143.9%+40.443.2%724
59.5%
 Pedone 1.2 64-bit 4CPU2800+36−3648.4%+9.042.3%246
63.9%
 Crafty 23.1 64-bit 4CPU2791+36−3743.8%+42.536.9%241
53.7%
 Laser 1.0 64-bit 4CPU2788+37−3836.3%+89.839.2%227
58.4%
 Bagatur 1.7a 64-bit 4CPU2773+131−13445.0%+31.220.0%20
54.8%
 Glaurung 1.2.1 64-bit 4CPU2765+18−1940.2%+64.038.1%967
69.1%
 Crafty 23.0 64-bit 4CPU2758+18−1839.0%+77.834.1%1042
69.0%
73Fridolin 3.10 64-bit 4CPU2748+33−3349.5%−0.231.5%308
55.6%
 Alfil 13.1 64-bit 4CPU2745+28−2841.8%+53.234.1%440
76.8%
 Scorpio 2.0 32-bit 4CPU2731+24−2433.4%+114.836.7%607
62.7%
74Nebula 2.0 64-bit 4CPU2725+20−2045.1%+36.134.1%866
66.1%
 Scorpio 2.1 64-bit 4CPU2718+27−2734.4%+109.231.6%490
80.3%
 Igel 1.4.1 64-bit 4CPU2701+28−2850.7%−7.026.3%448
76.8%
75Hamsters 0.7.1 4CPU2685+32−3252.4%−14.136.2%318
54.2%
76RedQueen 1.1.98 64-bit 4CPU2683+27−2739.4%+80.428.5%494
65.3%
77ECE X3 64-bit 4CPU2676+23−2341.5%+68.423.4%709
57.4%
78Pharaon 3.5.1 4CPU2673+26−2643.6%+41.429.7%518
62.0%
79Jellyfish 1.1 64-bit 4CPU2667+29−2953.3%−25.532.3%403
60.2%
 RedQueen 1.1.97 64-bit 4CPU2662+22−2245.7%+26.733.3%726
71.5%
80Ghost 3.1 64-bit 4CPU2651+30−3053.9%−25.528.5%393
53.5%
81Arminius 2015-08-06 64-bit 4CPU2649+33−3344.2%+38.536.1%302
52.2%
 Gaviota 0.83 64-bit 4CPU2648+25−2547.3%+20.727.9%566
99.6%
 Fridolin 2.00 64-bit 4CPU2588+34−3441.9%+57.331.3%297
93.1%
82‑83Delphil 3.2 64-bit 4CPU2554+31−3138.2%+85.630.5%374
50.3%
82‑83Jazz 840 64-bit 4CPU2554+20−2057.8%−63.925.3%1000
91.7%
84Nemeton 1.8 4CPU2530+27−2749.9%+1.727.2%496
86.6%
85Jumbo 0.6.66 64-bit 4CPU2509+28−2850.0%−1.133.0%433
88.0%
86Myrddin 0.87 64-bit 4CPU2483+35−3538.9%+80.928.4%296
85.9%
 Invictus r228 64-bit 4CPU2341+242−29528.6%+166.40.0%7
 

Results matrix

Free 4-CPU engines (best versions only), top 12
#NameElo123456789101112
1Stockfish 13 64-bit 4CPU3549 8.5 − 3.5
+5−0=7
−16
26.5 − 7.5
+19−0=15
+28
41.5 − 10.5
+31−0=21
+42
 43 − 13
+30−0=26
+12
38.5 − 11.5
+27−0=23
+3
40 − 12
+28−0=24
+4
22.5 − 9.5
+13−0=19
−97
27 − 11
+16−0=22
−90
42.5 − 7.5
+35−0=15
+36
88 − 16
+72−0=32
+10
2RubiChess 2.1 64-bit 4CPU34113.5 − 8.5
+0−5=7
+16
 25.5 − 24.5
+2−1=47
−5
6 − 6
+1−1=10
−17
 5.5 − 6.5
+1−2=9
−38
31 − 19
+16−4=30
+42
6 − 6
+0−0=12
−27
7.5 − 4.5
+3−0=9
−10
38.5 − 21.5
+19−2=39
+1
8 − 4
+5−1=6
+20
 
3Igel 3.0.0 64-bit 4CPU34017.5 − 26.5
+0−19=15
−28
24.5 − 25.5
+1−2=47
+5
 16 − 18
+2−4=28
−18
 14.5 − 17.5
+1−4=27
−31
14 − 16
+4−6=20
−32
15 − 15
+5−5=20
−17
29.5 − 16.5
+15−2=29
+12
18.5 − 11.5
+8−1=21
−2
19.5 − 8.5
+13−2=13
+50
 
4SlowChess Blitz 2.5 64-bit 4CPU339610.5 − 41.5
+0−31=21
−42
6 − 6
+1−1=10
+17
18 − 16
+4−2=28
+18
  17 − 15
+7−5=20
+12
27 − 27
+8−8=38
−10
18 − 14
+5−1=26
+19
17 − 15
+7−5=20
−41
24 − 14
+11−1=26
+9
18 − 14
+6−2=24
−32
21.5 − 10.5
+15−4=13
+24
5Komodo 12 64-bit 4CPU3393            
6Ethereal 12.75 64-bit 4CPU339213 − 43
+0−30=26
−12
6.5 − 5.5
+2−1=9
+38
17.5 − 14.5
+4−1=27
+31
15 − 17
+5−7=20
−12
  26.5 − 27.5
+7−8=39
−12
17 − 15
+5−3=24
+6
18.5 − 13.5
+6−1=25
−15
21 − 17
+7−3=28
−28
17.5 − 12.5
+6−1=23
−19
19 − 11
+9−1=20
−8
7Fire 8 64-bit 4CPU338511.5 − 38.5
+0−27=23
−3
19 − 31
+4−16=30
−42
16 − 14
+6−4=20
+32
27 − 27
+8−8=38
+10
 27.5 − 26.5
+8−7=39
+12
 24.5 − 27.5
+6−9=37
−16
30 − 16
+14−0=32
+33
21.5 − 14.5
+9−2=25
+4
34.5 − 17.5
+18−1=33
+34
35.5 − 16.5
+20−1=31
+28
8Nemorino 6.00 64-bit 4CPU338412 − 40
+0−28=24
−4
6 − 6
+0−0=12
+27
15 − 15
+5−5=20
+17
14 − 18
+1−5=26
−19
 15 − 17
+3−5=24
−6
27.5 − 24.5
+9−6=37
+16
  32.5 − 19.5
+20−7=25
+27
19 − 13
+8−2=22
−4
21 − 11
+13−3=16
+20
9Booot 6.5 64-bit 4CPU33369.5 − 22.5
+0−13=19
+97
4.5 − 7.5
+0−3=9
+10
16.5 − 29.5
+2−15=29
−12
15 − 17
+5−7=20
+41
 13.5 − 18.5
+1−6=25
+15
16 − 30
+0−14=32
−33
  46 − 50
+18−22=56
−10
13 − 19
+1−7=24
−55
 
10Lc0 0.27.0 w703810 64-bit 4CPU333611 − 27
+0−16=22
+90
21.5 − 38.5
+2−19=39
−1
11.5 − 18.5
+1−8=21
+2
14 − 24
+1−11=26
−9
 17 − 21
+3−7=28
+28
14.5 − 21.5
+2−9=25
−4
19.5 − 32.5
+7−20=25
−27
50 − 46
+22−18=56
+10
 19.5 − 14.5
+10−5=19
+35
18 − 18
+6−6=24
−26
11Xiphos 0.6 64-bit 4CPU33307.5 − 42.5
+0−35=15
−36
4 − 8
+1−5=6
−20
8.5 − 19.5
+2−13=13
−50
14 − 18
+2−6=24
+32
 12.5 − 17.5
+1−6=23
+19
17.5 − 34.5
+1−18=33
−34
13 − 19
+2−8=22
+4
19 − 13
+7−1=24
+55
14.5 − 19.5
+5−10=19
−35
 16 − 16
+4−4=24
−20
12RofChade 2.3 64-bit 4CPU331116 − 88
+0−72=32
−10
  10.5 − 21.5
+4−15=13
−24
 11 − 19
+1−9=20
+8
16.5 − 35.5
+1−20=31
−28
11 − 21
+3−13=16
−20
 18 − 18
+6−6=24
+26
16 − 16
+4−4=24
+20
 
Performance color legend:
(Only pairs with at least 30 games)
-120 -100 -80 -60 -40 -20 0 20 40 60 80 100 120

LOS matrix

Free 4-CPU engines (best versions only), top 12
#NameElo123456789101112
1Stockfish 13 64-bit 4CPU3549 100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
2RubiChess 2.1 64-bit 4CPU34110.0 73.582.386.089.495.195.5100.0100.0100.0100.0
3Igel 3.0.0 64-bit 4CPU34010.026.5 63.470.775.887.489.3100.0100.0100.0100.0
4SlowChess Blitz 2.5 64-bit 4CPU33960.017.736.6 59.564.881.584.1100.0100.0100.0100.0
5Komodo 12 64-bit 4CPU33930.014.029.340.5 54.272.376.2100.0100.0100.0100.0
6Ethereal 12.75 64-bit 4CPU33920.010.624.235.245.8 71.575.5100.0100.0100.0100.0
7Fire 8 64-bit 4CPU33850.04.912.618.527.728.5 54.6100.0100.0100.0100.0
8Nemorino 6.00 64-bit 4CPU33840.04.510.715.923.824.545.4 100.0100.0100.0100.0
9Booot 6.5 64-bit 4CPU33360.00.00.00.00.00.00.00.0 50.768.396.3
10Lc0 0.27.0 w703810 64-bit 4CPU33360.00.00.00.00.00.00.00.049.3 70.598.2
11Xiphos 0.6 64-bit 4CPU33300.00.00.00.00.00.00.00.031.729.5 97.2
12RofChade 2.3 64-bit 4CPU33110.00.00.00.00.00.00.00.03.71.82.8 
LOS color legend:
0 10 20 30 40 50 60 70 80 90 100

Alter engine selection



Alter output selection

Rating list
Testing profile
  (Step: , Numbers: )

Results table
Performance table
Score table
LOS table
Proportion of draws
Number of games
Number of connecting games
Percentage of connecting games
Score with common opponents
Score with all opponents
Performance with common opponents
Performance with all opponents
LOS with common opponents
LOS with all opponents

Maximum size of cross-tables (from 2 to 100):
Limit crosstables to engines in Elo range: to
Match length (Minimum number of games to highlight with color):

Cross-tables show only best version of each engine
Sort cross-tables by:   Rating   Name
Highlight diagonal of cells wide. (0 to highlight everything)

Reference rating list:
Recalibrate:
  No recalibration (reference and current list are compared as they are)
  Recalibrate reference list to current one using selected engines only
  Recalibrate reference list to current one using all common engines
  Recalibrate current list to reference using selected engines only
  Recalibrate current list to reference using all common engines


Created in 2005-2013 by CCRL team
Last games added on May 1, 2021