CCRL 40/15
Downloads and Statistics
May 8, 2021
Testing summary:
Total: 1'242'291 games
played by 2'843 programs

White wins: 425'658 (34.3%)
Black wins: 312'703 (25.2%)
Draws: 503'930 (40.6%)
White score: 54.5%

Open source 4-CPU engines

Comparing 213 engines!
44 best versions of selected engines played 3169 games with each other

CCRL 40/15 Rating List — Open source 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 8, 2021 with Bayeselo based on 1'242'291 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 4CPU3548+19−1877.3%−181.845.3%1026 
54.1%
 Stockfish 2021-01-11 64-bit 4CPU3547+19−1975.2%−164.448.8%946
89.0%
 ShashChess 15.0 64-bit 4CPU3528+23−2275.1%−163.449.5%658
76.9%
 SugaR AI 1.00 64-bit 4CPU3516+26−2672.4%−142.953.4%468
55.1%
 Stockfish 12 64-bit 4CPU3514+19−1971.8%−140.156.0%841
95.2%
 Stockfish 2019-10-09 64-bit 4CPU3488+23−2374.7%−155.550.3%616
78.3%
 Stockfish 11 64-bit 4CPU3477+20−1973.0%−143.352.6%840
72.7%
 SugaR NN 1.1 64-bit 4CPU3469+16−1570.8%−132.252.4%1344
77.9%
 Stockfish 10 64-bit 4CPU3460+17−1673.4%−155.250.3%1227
55.2%
 SugaR 1.6.1 64-bit 4CPU3458+25−2569.0%−118.057.4%479
66.3%
 Stockfish 270918 64-bit 4CPU3450+28−2777.9%−188.943.3%457
72.1%
 ShashChess 8.0 64-bit 4CPU3441+15−1565.8%−94.463.7%1206
76.4%
 SugaR XPrO 1.5.3 64-bit 4CPU3430+24−2471.8%−144.151.3%544
54.2%
 Stockfish 9 64-bit 4CPU3428+15−1572.3%−152.850.5%1423
60.1%
 Igel 3.0.5 64-bit 4CPU3419+65−6551.9%−9.092.3%52
61.0%
2RubiChess 2.1 64-bit 4CPU3410+23−2347.6%+15.070.5%508
55.3%
 SugaR XPrO 1.4 64-bit 4CPU3408+20−2072.3%−150.551.8%840
55.2%
 asmFish 051117 64-bit 4CPU3406+19−1969.8%−130.555.7%819
66.7%
3Igel 3.0.0 64-bit 4CPU3399+22−2247.3%+15.770.0%566
56.9%
 SugaR XPrO 1.2 64-bit 4CPU3396+21−2070.4%−135.952.5%754
67.2%
4Ethereal 12.75 64-bit 4CPU3390+15−1548.7%+10.267.9%1182
53.3%
 ShashChess Pro 1.0 64-bit 4CPU3389+33−3365.6%−94.561.7%256
62.4%
5Nemorino 6.00 64-bit 4CPU3382+17−1748.4%+7.061.6%1031
72.4%
 Stockfish 8 64-bit 4CPU3375+13−1365.1%−96.062.1%1647
53.8%
 Nemorino 6.05 64-bit 4CPU3374+23−2344.8%+31.470.6%496
58.6%
 SugaR XPrO 1.3 64-bit 4CPU3370+23−2266.0%−102.757.4%598
71.2%
 Ethereal 12.25 64-bit 4CPU3361+22−2249.3%+5.771.0%544
54.3%
 Igel 2.9.0 64-bit 4CPU3359+17−1748.2%+13.460.6%1050
53.5%
 Igel 2.8.0 64-bit 4CPU3358+25−2553.6%−15.958.2%457
60.1%
 RubiChess 2.0 64-bit 4CPU3354+20−2042.4%+47.469.8%666
66.0%
 Ethereal 12.00 64-bit 4CPU3348+22−2250.9%−3.668.8%564
62.1%
 Ethereal 11.75 64-bit 4CPU3343+21−2147.3%+14.965.0%614
75.3%
6Lc0 0.27.0 w703810 64-bit 4CPU3333+18−1843.5%+37.960.2%914
53.0%
7Booot 6.5 64-bit 4CPU3332+21−2236.5%+82.558.8%634
62.2%
8Xiphos 0.6 64-bit 4CPU3328+13−1340.5%+60.561.5%1760
64.0%
 Stockfish 7 64-bit 4CPU3324+15−1567.0%−105.957.3%1304
56.7%
 Ethereal 11.53 64-bit 4CPU3321+23−2252.3%−12.564.0%542
83.0%
 Xiphos 0.5 64-bit 4CPU3307+20−2046.1%+25.666.7%673
81.5%
 Booot 6.4 64-bit 4CPU3296+15−1538.2%+74.259.8%1337
49.8%
 Ethereal 11.25 64-bit 4CPU3296+21−2246.3%+23.665.5%588
51.1%
 Ethereal 11.00 64-bit 4CPU3295+19−1947.0%+18.363.2%778
62.8%
 RubiChess 1.8 64-bit 4CPU3291+19−1938.1%+71.861.1%814
55.7%
 Stockfish 6 64-bit 4CPU3289+14−1465.3%−94.357.3%1542
56.5%
 RubiChess 1.7.3 64-bit 4CPU3287+20−2048.3%+9.862.4%736
59.2%
9Laser 1.7 64-bit 4CPU3284+13−1340.5%+61.860.4%1829
76.8%
10Defenchess 2.2 64-bit 4CPU3277+14−1442.0%+51.360.2%1423
65.4%
 Ethereal 10.55 64-bit 4CPU3271+25−2549.8%−1.657.4%488
61.2%
 Stockfish 5 64-bit 4CPU3267+15−1567.7%−109.454.0%1346
72.8%
11Andscacs 0.94 64-bit 4CPU3259+18−1847.2%+18.454.2%907
54.8%
 Andscacs 0.95 64-bit 4CPU3258+16−1643.9%+38.060.6%1077
47.7%
 Booot 6.3.1 64-bit 4CPU3258+15−1543.0%+44.557.4%1366
82.4%
 Xiphos 0.4 64-bit 4CPU3247+19−1943.8%+39.661.1%830
79.4%
 Andscacs 0.921 64-bit 4CPU3237+16−1650.7%−6.647.5%1225
52.3%
 Andscacs 0.93 64-bit 4CPU3236+18−1842.9%+45.454.8%938
63.8%
 Stockfish DD 64-bit 4CPU3232+17−1763.0%−78.656.1%1032
54.5%
12Arasan 22.2 64-bit 4CPU3230+28−2851.9%−12.155.9%372
59.9%
13Halogen 10 64-bit 4CPU3225+26−2648.2%+11.066.3%380
49.6%
 RubiChess 1.6 64-bit 4CPU3225+25−2559.5%−58.350.9%466
72.6%
 Arasan 21.4 64-bit 4CPU3214+25−2545.0%+26.455.6%464
50.6%
 Booot 6.2 64-bit 4CPU3214+14−1442.9%+46.359.3%1517
51.3%
 Laser 1.6 64-bit 4CPU3214+16−1643.5%+43.455.2%1124
79.0%
 Stockfish 4 64-bit 4CPU3204+16−1660.1%−60.359.1%1086
72.8%
 Arasan 21.3 64-bit 4CPU3193+30−3046.7%+25.855.7%314
63.1%
 Ethereal 10.00 64-bit 4CPU3187+20−2053.4%−23.650.8%788
60.9%
14Vajolet2 2.8 64-bit 4CPU3182+27−2747.7%+11.863.5%370
53.6%
 Vajolet2 2.7 64-bit 4CPU3180+24−2451.0%−6.555.8%507
55.6%
15Gull 3 64-bit 4CPU3178+9−942.5%+48.554.2%3783
57.6%
 Gull 2.8b 64-bit 4CPU3176+19−1949.1%+4.051.8%797
51.6%
 Xiphos 0.3 64-bit 4CPU3176+21−2149.2%+3.054.2%660
64.7%
 Arasan 21.2 64-bit 4CPU3168+30−3052.2%−11.760.6%302
57.4%
 Booot 6.1 64-bit 4CPU3165+20−2042.0%+49.360.3%726
50.9%
 Arasan 21.1 64-bit 4CPU3164+27−2751.2%−7.159.5%383
50.9%
16ChessBrainVB 3.72 4CPU3164+30−3045.0%+30.751.3%320
49.1%
 Stockfish 3 64-bit 4CPU3164+21−2156.0%−35.057.8%663
51.9%
 ChessBrainVB 3.74 4CPU3161+128−13046.9%+18.056.3%16
50.6%
 RubiChess 1.5 64-bit 4CPU3160+29−2952.4%−14.054.3%348
78.7%
 Nemorino 5.00 64-bit 4CPU3146+18−1848.1%+10.452.3%878
54.8%
 Stockfish 2.2.2 64-bit 4CPU3145+16−1659.2%−56.653.4%1141
65.6%
 Gull 2.3 64-bit 4CPU3140+17−1747.4%+14.959.3%982
48.9%
 Laser 1.5 64-bit 4CPU3140+20−2049.4%+8.454.5%723
50.4%
 Stockfish 2.3.1 64-bit 4CPU3140+19−1955.4%−33.052.5%846
55.5%
17Texel 1.07 64-bit 4CPU3139+14−1449.3%+5.849.2%1636
57.3%
18Protector 1.9.0 64-bit 4CPU3137+15−1546.4%+24.453.9%1338
59.3%
 Vajolet2 2.6.1 64-bit 4CPU3133+21−2150.8%−4.260.3%605
55.6%
 Igel 2.3.1 64-bit 4CPU3131+27−2750.2%−2.353.2%406
52.3%
 Sting SF 6 64-bit 4CPU3130+28−2850.8%−6.761.0%354
50.8%
 Texel 1.06 64-bit 4CPU3130+20−2046.1%+24.953.6%739
50.4%
 Sting SF 4.8.4 64-bit 4CPU3129+29−2953.3%−20.662.4%330
59.8%
 Stockfish 2.0.1 64-bit 4CPU3124+24−2456.4%−40.248.6%514
54.8%
 Protector 1.8.0 64-bit 4CPU3122+28−2750.4%−1.554.7%386
51.6%
 ChessBrainVB 3.68 4CPU3121+26−2649.2%+4.551.6%428
50.4%
 Gull 3.1 64-bit 4CPU3121+30−3045.4%+33.845.1%359
57.1%
 Arasan 20.4.1 64-bit 4CPU3118+26−2551.7%−11.050.2%452
54.8%
 Sting SF 5 64-bit 4CPU3115+25−2548.1%+13.054.0%465
53.5%
 Stockfish 1.9.1 64-bit 4CPU3114+22−2259.9%−67.947.1%665
58.0%
19IvanHoe 9.46h 64-bit 4CPU3111+14−1453.2%−19.259.5%1542
51.5%
 Stockfish 2.1.1 64-bit 4CPU3111+27−2754.7%−29.648.3%406
58.4%
 Sting SF 3 64-bit 4CPU3107+21−2147.7%+11.558.5%644
51.6%
20Senpai 2.0 64-bit 4CPU3106+19−1950.6%−5.348.7%866
51.3%
 Sting SF 2 64-bit 4CPU3106+27−2748.8%+8.058.1%375
49.2%
 Sting SF 9 64-bit 4CPU3106+28−2848.0%+11.047.2%381
49.5%
 Stockfish 1.8 64-bit 4CPU3106+18−1860.4%−70.350.6%942
51.9%
21Winter 0.7 64-bit 4CPU3105+25−2645.1%+32.047.1%463
53.7%
 ChessBrainVB 3.66 4CPU3104+28−2854.2%−27.548.7%378
54.5%
 Stockfish 1.7.1 64-bit 4CPU3102+18−1860.4%−68.452.6%882
54.2%
 Xiphos 0.2.2 64-bit 4CPU3100+26−2647.3%+14.053.6%414
58.8%
 Gull 2.2 64-bit 4CPU3096+25−2544.5%+31.154.8%469
52.4%
 Vajolet2 2.5 64-bit 4CPU3095+24−2451.5%−9.954.0%493
54.8%
 Nemorino 4.00 64-bit 4CPU3093+22−2250.0%+1.152.9%624
51.0%
 Sting SF 4 64-bit 4CPU3092+23−2341.9%+49.548.9%562
62.6%
 Arasan 20.3 64-bit 4CPU3086+32−3252.5%−20.147.4%302
50.3%
 Laser 1.4 64-bit 4CPU3086+19−1949.6%+0.045.7%843
59.9%
 Texel 1.05 64-bit 4CPU3082+17−1747.3%+18.951.4%1016
76.9%
 Protector 1.7.0 64-bit 4CPU3073+19−1944.1%+36.650.6%834
52.0%
 Demolito 2019-04-27 64-bit 4CPU3071+66−6650.0%−0.238.9%72
50.5%
22Amoeba 3.1 64-bit 4CPU3070+34−3442.1%+48.749.6%254
52.1%
 Nemorino 3.0 64-bit 4CPU3069+27−2747.9%+13.646.1%427
51.4%
 Protector 1.6.0 64-bit 4CPU3069+21−2243.2%+44.250.2%656
52.4%
23Rodent III 0.238 64-bit 4CPU3068+20−2047.2%+14.650.0%742
54.2%
 Rodent III 0.276 64-bit 4CPU3066+29−2949.6%+3.258.2%337
52.6%
 RubiChess 1.3 64-bit 4CPU3065+22−2252.8%−18.444.2%642
54.9%
 Defenchess 1.1f 64-bit 4CPU3063+18−1851.7%−12.145.3%916
49.2%
24‑25Demolito 2018-10-29 64-bit 4CPU3063+30−3048.6%+5.651.9%322
49.6%
24‑25Topple 0.7.5 64-bit 4CPU3063+28−2851.6%−10.846.4%394
66.4%
 Texel 1.04 64-bit 4CPU3056+21−2143.1%+42.947.8%722
56.4%
 Protector 1.5.0 64-bit 4CPU3054+18−1842.5%+47.247.4%952
55.8%
 Amoeba 3.0 64-bit 4CPU3051+26−2654.8%−32.144.8%466
56.1%
 Ethereal 9.00 64-bit 4CPU3048+23−2346.8%+19.345.1%570
65.1%
 Arasan 19.2 64-bit 4CPU3041+31−3151.0%−6.754.8%305
51.2%
 Vajolet2 2.2 64-bit 4CPU3040+27−2747.0%+15.148.7%423
49.2%
 Vajolet2 2.4 64-bit 4CPU3040+19−1947.2%+18.645.7%878
59.7%
 Gull R375 64-bit 4CPU3037+22−2243.4%+36.857.4%605
53.1%
 Stockfish 1.6.3 64-bit 4CPU3035+22−2257.5%−49.645.3%651
67.8%
 Arasan 20.0 64-bit 4CPU3026+30−3047.4%+16.853.4%328
51.6%
 Vajolet2 2.3 64-bit 4CPU3026+31−3145.2%+25.053.5%303
53.9%
26‑27Bobcat 8.0 64-bit 4CPU3024+21−2148.3%+11.153.5%636
50.4%
26‑27Pirarucu 2.7.4 64-bit 4CPU3024+21−2053.6%−27.647.6%735
52.0%
 Pirarucu 2.9.5 64-bit 4CPU3023+33−3350.0%−2.753.2%269
52.4%
 Senpai 1.0 64-bit 4CPU3021+16−1746.2%+21.553.5%1095
64.3%
 Winter 0.6 64-bit 4CPU3014+32−3253.0%−27.135.6%329
55.5%
28Crafty 25.2 64-bit 4CPU3012+16−1648.5%+9.142.5%1279
51.7%
29chess22k 1.10 64-bit 4CPU3011+22−2246.7%+16.743.7%680
52.6%
 Arasan 19.0.1 64-bit 4CPU3010+32−3151.3%−12.140.9%318
49.9%
 Nemorino 2.00 64-bit 4CPU3010+30−3047.0%+16.459.6%302
55.2%
30Cheng 4.39 64-bit 4CPU3008+15−1549.4%+4.048.6%1333
48.6%
 Laser 1.3 64-bit 4CPU3008+30−3047.2%+15.955.8%321
50.6%
 Texel 1.03 64-bit 4CPU3008+31−3150.3%−1.247.0%313
70.6%
 Vajolet2 2.1 64-bit 4CPU2997+25−2550.9%−3.848.5%462
54.4%
 Rodent III 0.210 64-bit 4CPU2995+28−2845.1%+32.742.5%402
74.2%
31Scorpio 2.8 64-bit 4CPU2982+25−2548.8%+7.246.3%492
53.5%
 Protector 1.4.0 64-bit 4CPU2981+19−1942.5%+48.742.9%912
55.1%
 Cheng4 0.38 64-bit 4CPU2979+24−2446.0%+22.942.4%531
53.5%
 Bobcat 7.6 64-bit 4CPU2977+31−3148.6%+8.641.8%318
59.5%
 Arasan 18.3 64-bit 4CPU2971+30−3046.6%+20.946.8%327
54.8%
 Arasan 18.2 64-bit 4CPU2969+28−2851.9%−14.950.3%388
48.7%
32EXchess 7.97b 64-bit 4CPU2969+17−1847.4%+19.045.9%1017
55.1%
 Stockfish 1.5.1 64-bit 4CPU2967+25−2453.7%−23.047.7%495
63.7%
 Demolito 2017-08-26 64-bit 4CPU2961+21−2140.2%+63.940.8%748
49.8%
 Winter 0.5 64-bit 4CPU2961+26−2650.4%−4.938.3%470
53.2%
 Protector 1.3.6 64-bit 4CPU2960+32−3246.6%+18.344.3%307
58.6%
33Toga II 4.0 64-bit 4CPU2956+19−1941.4%+56.540.4%958
50.6%
 EXchess 7.88b 64-bit 4CPU2955+29−2945.4%+29.948.6%356
65.2%
 Crafty 25.0 64-bit 4CPU2948+25−2548.1%+12.547.9%468
54.5%
 Stockfish 1.4 64-bit 4CPU2946+17−1754.2%−29.042.2%1131
55.7%
 Scorpio 2.7.9 64-bit 4CPU2944+22−2246.7%+20.640.5%659
58.1%
34Tucano 7.07 64-bit 4CPU2940+33−3351.5%−10.444.7%291
51.9%
 EXchess 7.51b 64-bit 4CPU2938+32−3249.5%+5.545.6%296
57.0%
35Marvin 3.3.2 64-bit 4CPU2934+36−3743.4%+40.044.7%228
51.6%
 Arasan 17.5 64-bit 4CPU2933+27−2748.4%+9.945.1%406
56.1%
 Bobcat 7.1 64-bit 4CPU2930+31−3147.5%+15.745.9%314
48.6%
 EXchess 7.71b 64-bit 4CPU2930+28−2853.3%−22.443.2%403
52.8%
 Ethereal 8.62 64-bit 4CPU2929+22−2244.2%+35.749.7%600
59.9%
 Arasan 18.0 64-bit 4CPU2924+29−2947.2%+16.141.5%378
58.6%
 Marvin 3.2.0 64-bit 4CPU2920+21−2153.7%−26.143.0%698
58.7%
 Toga II 3.0 4CPU2917+22−2345.6%+27.049.0%592
68.3%
 Crafty 23.8 64-bit 4CPU2907+32−3345.8%+27.647.0%287
60.9%
 Toga II 1.4.1SE 4CPU2902+13−1348.5%+10.941.6%2041
51.1%
 Asymptote 0.6 64-bit 4CPU2901+95−9548.3%+3.056.7%30
54.7%
 Cheng4 0.36c 64-bit 4CPU2895+30−3048.8%+6.246.6%326
52.5%
36Glaurung 2.2 64-bit 4CPU2894+16−1647.0%+18.940.7%1259
71.3%
37Octochess r5506 64-bit 4CPU2886+20−2144.5%+35.846.7%715
56.0%
38MinkoChess 1.3 64-bit 4CPU2884+21−2146.0%+24.343.7%725
51.0%
 Toga II 1.4 beta5c 4CPU2883+18−1851.7%−11.545.8%996
65.0%
 Crafty 24.1 64-bit 4CPU2876+31−3243.5%+41.639.1%322
56.8%
 Scorpio 2.7.6 64-bit 4CPU2873+26−2647.4%+16.344.0%445
64.3%
 Glaurung 2.1 64-bit 4CPU2866+19−1942.8%+51.241.3%946
53.9%
 Bobcat 6.4b 64-bit 4CPU2865+27−2748.3%+11.346.5%415
53.4%
 EXchess 7.18b 64-bit 4CPU2863+33−3347.3%+16.638.4%292
57.9%
 Scorpio 2.7.5 64-bit 4CPU2858+33−3345.7%+25.050.0%266
52.8%
 Crafty 23.4 64-bit 4CPU2857+34−3446.9%+19.035.7%272
51.0%
 Arasan 16.3 64-bit 4CPU2856+34−3449.1%+4.540.2%276
53.8%
 Scorpio 2.7.7 64-bit 4CPU2854+32−3242.9%+44.541.3%310
51.3%
39Monolith 1.0 64-bit 4CPU2853+22−2148.6%+8.243.0%693
53.6%
40Counter 3.2 64-bit 4CPU2851+32−3250.7%−4.640.2%301
56.9%
 Igel 1.9.0 64-bit 4CPU2847+31−3241.0%+59.639.5%324
69.9%
 Crafty 23.3 64-bit 4CPU2835+31−3241.5%+55.438.2%325
66.4%
 Glaurung 2.0.1 64-bit 4CPU2827+17−1743.8%+39.143.5%1100
65.7%
 Octochess r5190 64-bit 4CPU2821+24−2445.9%+24.144.5%555
91.6%
 Crafty 23.1 64-bit 4CPU2790+36−3743.8%+42.536.9%241
53.7%
 Laser 1.0 64-bit 4CPU2787+37−3836.3%+90.039.2%227
58.4%
 Bagatur 1.7a 64-bit 4CPU2772+131−13445.0%+31.220.0%20
54.8%
 Glaurung 1.2.1 64-bit 4CPU2764+19−1940.2%+64.338.1%967
69.2%
 Crafty 23.0 64-bit 4CPU2757+18−1839.0%+77.934.1%1042
69.0%
41Fridolin 3.10 64-bit 4CPU2747+33−3349.5%−0.031.5%308
78.3%
 Scorpio 2.0 32-bit 4CPU2730+24−2433.4%+114.936.7%607
76.2%
 Scorpio 2.1 64-bit 4CPU2717+27−2734.4%+109.331.6%490
80.2%
 Igel 1.4.1 64-bit 4CPU2700+28−2850.7%−6.926.3%448
81.2%
42RedQueen 1.1.98 64-bit 4CPU2682+27−2739.4%+80.428.5%494
88.0%
 RedQueen 1.1.97 64-bit 4CPU2661+22−2245.7%+27.033.3%726
100.0%
 Fridolin 2.00 64-bit 4CPU2587+34−3441.9%+57.531.3%297
95.0%
43Jazz 840 64-bit 4CPU2553+20−2057.8%−63.725.3%1000
91.7%
44Nemeton 1.8 4CPU2529+27−2749.9%+1.927.2%496
92.5%
 Invictus r228 64-bit 4CPU2340+242−29528.6%+166.60.0%7
 

Results matrix

Open source 4-CPU engines (best versions only), top 12
#NameElo123456789101112
1Stockfish 13 64-bit 4CPU3548 15 − 5
+10−0=10
+16
26.5 − 7.5
+19−0=15
+28
43 − 13
+30−0=26
+11
40 − 12
+28−0=24
+3
27 − 11
+16−0=22
−92
22.5 − 9.5
+13−0=19
−100
42.5 − 7.5
+35−0=15
+35
100 − 14
+86−0=28
+27
   
2RubiChess 2.1 64-bit 4CPU34105 − 15
+0−10=10
−16
 25.5 − 24.5
+2−1=47
−6
9 − 11
+1−3=16
−44
10 − 10
+1−1=18
−29
45 − 23
+24−2=42
+11
13 − 7
+7−1=12
+6
13 − 7
+7−1=12
+2
    
3Igel 3.0.0 64-bit 4CPU33997.5 − 26.5
+0−19=15
−28
24.5 − 25.5
+1−2=47
+6
 14.5 − 17.5
+1−4=27
−31
15 − 15
+5−5=20
−17
18.5 − 11.5
+8−1=21
−3
29.5 − 16.5
+15−2=29
+10
19.5 − 8.5
+13−2=13
+50
    
4Ethereal 12.75 64-bit 4CPU339013 − 43
+0−30=26
−11
11 − 9
+3−1=16
+44
17.5 − 14.5
+4−1=27
+31
 17 − 15
+5−3=24
+6
21 − 17
+7−3=28
−29
18.5 − 13.5
+6−1=25
−17
17.5 − 12.5
+6−1=23
−19
20.5 − 9.5
+11−0=19
−5
21.5 − 8.5
+13−0=17
+11
  
5Nemorino 6.00 64-bit 4CPU338212 − 40
+0−28=24
−3
10 − 10
+1−1=18
+29
15 − 15
+5−5=20
+17
15 − 17
+3−5=24
−6
 32.5 − 19.5
+20−7=25
+26
 19 − 13
+8−2=22
−4
21.5 − 10.5
+12−1=19
0
20.5 − 11.5
+12−3=17
−20
  
6Lc0 0.27.0 w703810 64-bit 4CPU333311 − 27
+0−16=22
+92
23 − 45
+2−24=42
−11
11.5 − 18.5
+1−8=21
+3
17 − 21
+3−7=28
+29
19.5 − 32.5
+7−20=25
−26
 50 − 46
+22−18=56
+9
19.5 − 14.5
+10−5=19
+36
    
7Booot 6.5 64-bit 4CPU33329.5 − 22.5
+0−13=19
+100
7 − 13
+1−7=12
−6
16.5 − 29.5
+2−15=29
−10
13.5 − 18.5
+1−6=25
+17
 46 − 50
+18−22=56
−9
 13 − 19
+1−7=24
−53
    
8Xiphos 0.6 64-bit 4CPU33287.5 − 42.5
+0−35=15
−35
7 − 13
+1−7=12
−2
8.5 − 19.5
+2−13=13
−50
12.5 − 17.5
+1−6=23
+19
13 − 19
+2−8=22
+4
14.5 − 19.5
+5−10=19
−36
19 − 13
+7−1=24
+53
 17.5 − 14.5
+7−4=21
−18
20.5 − 11.5
+9−0=23
+24
 10.5 − 5.5
+6−1=9
−8
9Laser 1.7 64-bit 4CPU328414 − 100
+0−86=28
−27
  9.5 − 20.5
+0−11=19
+5
10.5 − 21.5
+1−12=19
0
  14.5 − 17.5
+4−7=21
+18
 16 − 16
+6−6=20
−7
 9.5 − 6.5
+5−2=9
+2
10Defenchess 2.2 64-bit 4CPU3277   8.5 − 21.5
+0−13=17
−11
11.5 − 20.5
+3−12=17
+20
  11.5 − 20.5
+0−9=23
−24
16 − 16
+6−6=20
+7
  11.5 − 4.5
+8−1=7
+87
11Andscacs 0.94 64-bit 4CPU3259            
12Arasan 22.2 64-bit 4CPU3230       5.5 − 10.5
+1−6=9
+8
6.5 − 9.5
+2−5=9
−2
4.5 − 11.5
+1−8=7
−87
  
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

Open source 4-CPU engines (best versions only), top 12
#NameElo123456789101112
1Stockfish 13 64-bit 4CPU3548 100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
2RubiChess 2.1 64-bit 4CPU34100.0 75.591.396.8100.0100.0100.0100.0100.0100.0100.0
3Igel 3.0.0 64-bit 4CPU33990.024.5 74.988.9100.0100.0100.0100.0100.0100.0100.0
4Ethereal 12.75 64-bit 4CPU33900.08.725.1 75.8100.0100.0100.0100.0100.0100.0100.0
5Nemorino 6.00 64-bit 4CPU33820.03.211.124.2 100.0100.0100.0100.0100.0100.0100.0
6Lc0 0.27.0 w703810 64-bit 4CPU33330.00.00.00.00.0 53.067.3100.0100.0100.0100.0
7Booot 6.5 64-bit 4CPU33320.00.00.00.00.047.0 62.2100.0100.0100.0100.0
8Xiphos 0.6 64-bit 4CPU33280.00.00.00.00.032.737.8 100.0100.0100.0100.0
9Laser 1.7 64-bit 4CPU32840.00.00.00.00.00.00.00.0 76.898.4100.0
10Defenchess 2.2 64-bit 4CPU32770.00.00.00.00.00.00.00.023.2 93.099.9
11Andscacs 0.94 64-bit 4CPU32590.00.00.00.00.00.00.00.01.67.0 95.8
12Arasan 22.2 64-bit 4CPU32300.00.00.00.00.00.00.00.00.00.14.2 
LOS color legend:
0 10 20 30 40 50 60 70 80 90 100

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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

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Created in 2005-2013 by CCRL team
Last games added on May 8, 2021