CCRL 40/15
Downloads and Statistics
April 18, 2021
Testing summary:
Total: 1'237'253 games
played by 2'822 programs

White wins: 424'164 (34.3%)
Black wins: 311'650 (25.2%)
Draws: 501'439 (40.5%)
White score: 54.5%

Open source 4-CPU engines

Comparing 211 engines!
44 best versions of selected engines played 2859 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 April 18, 2021 with Bayeselo based on 1'237'253 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 2021-01-11 64-bit 4CPU3551+20−1975.3%−165.748.5%872 
52.1%
 Stockfish 13 64-bit 4CPU3550+19−1877.5%−182.845.1%1000
91.3%
 ShashChess 15.0 64-bit 4CPU3529+23−2375.2%−164.249.4%632
72.7%
 SugaR AI 1.00 64-bit 4CPU3519+27−2672.7%−145.552.7%442
59.2%
 Stockfish 12 64-bit 4CPU3515+19−1971.8%−139.756.0%841
95.4%
 Stockfish 2019-10-09 64-bit 4CPU3489+23−2374.7%−155.550.3%616
78.2%
 Stockfish 11 64-bit 4CPU3478+20−1973.0%−143.352.6%840
72.7%
 SugaR NN 1.1 64-bit 4CPU3470+16−1570.8%−132.252.4%1344
78.3%
 Stockfish 10 64-bit 4CPU3461+17−1673.4%−155.350.3%1227
55.3%
 SugaR 1.6.1 64-bit 4CPU3459+25−2569.0%−118.157.4%479
66.3%
 Stockfish 270918 64-bit 4CPU3451+28−2777.9%−189.043.3%457
71.7%
 ShashChess 8.0 64-bit 4CPU3442+16−1565.8%−94.563.7%1206
76.7%
 SugaR XPrO 1.5.3 64-bit 4CPU3431+24−2471.8%−144.351.3%544
54.3%
 Stockfish 9 64-bit 4CPU3429+15−1572.3%−153.050.5%1423
95.5%
 SugaR XPrO 1.4 64-bit 4CPU3408+20−2072.3%−149.651.8%840
55.3%
 asmFish 051117 64-bit 4CPU3407+19−1969.8%−130.655.7%819
66.1%
2Igel 3.0.0 64-bit 4CPU3400+23−2347.2%+16.967.6%516
56.9%
 SugaR XPrO 1.2 64-bit 4CPU3397+21−2070.4%−136.152.5%754
65.6%
3Ethereal 12.75 64-bit 4CPU3392+15−1548.6%+10.267.5%1156
54.3%
 ShashChess Pro 1.0 64-bit 4CPU3389+33−3365.6%−93.661.7%256
61.6%
4Nemorino 6.00 64-bit 4CPU3384+17−1748.3%+6.461.0%1011
68.1%
 Nemorino 6.05 64-bit 4CPU3377+23−2344.8%+31.170.8%490
51.8%
 Stockfish 8 64-bit 4CPU3376+14−1365.1%−96.262.1%1647
65.0%
 SugaR XPrO 1.3 64-bit 4CPU3371+23−2266.0%−102.857.4%598
70.5%
 Ethereal 12.25 64-bit 4CPU3362+22−2249.3%+5.771.0%544
52.3%
 Igel 2.9.0 64-bit 4CPU3361+17−1748.2%+13.360.6%1050
54.0%
 Igel 2.8.0 64-bit 4CPU3360+25−2553.6%−16.358.2%457
57.3%
5RubiChess 2.0 64-bit 4CPU3357+20−2042.5%+46.869.8%660
69.8%
 Ethereal 12.00 64-bit 4CPU3349+22−2250.9%−3.568.8%564
62.2%
 Ethereal 11.75 64-bit 4CPU3344+21−2147.3%+15.065.0%614
72.8%
6Lc0 0.27.0 w703810 64-bit 4CPU3335+19−1944.8%+30.560.3%824
61.5%
7Booot 6.5 64-bit 4CPU3331+24−2436.1%+84.558.8%490
53.1%
8Xiphos 0.6 64-bit 4CPU3330+13−1340.3%+61.261.4%1720
67.3%
 Stockfish 7 64-bit 4CPU3325+15−1567.0%−106.357.3%1304
56.0%
 Ethereal 11.53 64-bit 4CPU3322+23−2252.3%−12.664.0%542
83.0%
 Xiphos 0.5 64-bit 4CPU3308+20−2046.1%+25.566.7%673
80.8%
 Booot 6.4 64-bit 4CPU3297+15−1538.2%+74.759.9%1335
50.9%
 Ethereal 11.25 64-bit 4CPU3297+21−2246.3%+23.465.5%588
51.0%
 Ethereal 11.00 64-bit 4CPU3296+19−1947.0%+18.163.2%778
64.3%
 RubiChess 1.8 64-bit 4CPU3291+19−1937.6%+75.561.1%800
54.5%
 Stockfish 6 64-bit 4CPU3290+14−1465.3%−94.857.3%1542
55.6%
 RubiChess 1.7.3 64-bit 4CPU3288+20−2048.3%+9.762.4%736
58.1%
9Laser 1.7 64-bit 4CPU3285+13−1340.3%+62.960.3%1815
76.7%
10Defenchess 2.2 64-bit 4CPU3278+14−1441.8%+52.760.3%1409
66.5%
 Ethereal 10.55 64-bit 4CPU3272+25−2549.8%−1.757.4%488
61.7%
 Stockfish 5 64-bit 4CPU3268+15−1567.7%−109.954.0%1346
72.3%
11Andscacs 0.94 64-bit 4CPU3260+18−1847.2%+18.254.2%907
53.0%
 Booot 6.3.1 64-bit 4CPU3259+15−1543.0%+44.357.4%1366
55.5%
 Andscacs 0.95 64-bit 4CPU3258+17−1742.9%+43.560.4%1013
77.1%
 Xiphos 0.4 64-bit 4CPU3248+19−1943.8%+39.461.1%830
79.5%
 Andscacs 0.921 64-bit 4CPU3238+16−1650.7%−6.947.5%1225
52.2%
 Andscacs 0.93 64-bit 4CPU3237+18−1842.9%+45.254.8%938
53.9%
12Halogen 10 64-bit 4CPU3235+31−3150.4%−0.466.7%276
56.5%
 Stockfish DD 64-bit 4CPU3232+17−1763.0%−78.156.1%1032
64.9%
 RubiChess 1.6 64-bit 4CPU3226+25−2559.5%−58.450.9%466
54.9%
13Arasan 22.2 64-bit 4CPU3223+34−3450.8%−5.055.3%246
64.9%
 Arasan 21.4 64-bit 4CPU3215+25−2545.0%+26.355.6%464
50.8%
 Booot 6.2 64-bit 4CPU3215+14−1442.9%+46.159.3%1517
51.2%
 Laser 1.6 64-bit 4CPU3215+16−1643.5%+43.255.2%1124
79.4%
 Stockfish 4 64-bit 4CPU3204+16−1660.1%−59.859.1%1086
72.6%
 Arasan 21.3 64-bit 4CPU3194+30−3046.7%+25.755.7%314
63.0%
 Ethereal 10.00 64-bit 4CPU3187+20−2053.4%−22.850.8%788
60.7%
14Vajolet2 2.8 64-bit 4CPU3183+28−2847.8%+11.163.9%360
53.5%
 Vajolet2 2.7 64-bit 4CPU3181+24−2451.1%−7.256.1%503
56.0%
15Gull 3 64-bit 4CPU3179+9−942.5%+48.254.2%3783
57.8%
 Gull 2.8b 64-bit 4CPU3177+19−1949.1%+3.451.8%797
51.1%
 Xiphos 0.3 64-bit 4CPU3176+21−2149.2%+3.854.2%660
64.8%
 Arasan 21.2 64-bit 4CPU3169+30−3052.2%−12.160.6%302
57.5%
 Booot 6.1 64-bit 4CPU3166+20−2042.0%+49.060.3%726
50.8%
 Arasan 21.1 64-bit 4CPU3165+27−2751.2%−7.259.5%383
50.8%
16ChessBrainVB 3.72 4CPU3165+30−3045.0%+30.451.3%320
49.3%
 Stockfish 3 64-bit 4CPU3165+21−2156.0%−35.357.8%663
51.9%
 ChessBrainVB 3.74 4CPU3162+128−13046.9%+18.056.3%16
50.6%
 RubiChess 1.5 64-bit 4CPU3161+29−2952.4%−14.254.3%348
78.5%
 Nemorino 5.00 64-bit 4CPU3147+18−1848.1%+10.252.3%878
55.2%
 Stockfish 2.2.2 64-bit 4CPU3146+16−1659.2%−57.053.4%1141
65.9%
 Gull 2.3 64-bit 4CPU3141+17−1747.4%+14.459.3%982
48.5%
 Laser 1.5 64-bit 4CPU3141+20−2049.4%+8.154.5%723
50.7%
 Stockfish 2.3.1 64-bit 4CPU3141+19−1955.4%−33.452.5%846
55.6%
17Texel 1.07 64-bit 4CPU3139+14−1449.3%+6.249.1%1632
57.2%
18Protector 1.9.0 64-bit 4CPU3137+15−1546.4%+25.053.9%1338
59.1%
 Vajolet2 2.6.1 64-bit 4CPU3134+21−2150.8%−4.560.3%605
55.7%
 Igel 2.3.1 64-bit 4CPU3132+27−2750.2%−2.453.2%406
53.4%
 Sting SF 4.8.4 64-bit 4CPU3130+29−2953.3%−20.862.4%330
49.0%
 Sting SF 6 64-bit 4CPU3130+28−2850.8%−6.061.0%354
50.6%
 Texel 1.06 64-bit 4CPU3130+20−2046.1%+25.553.6%739
62.2%
 Stockfish 2.0.1 64-bit 4CPU3125+24−2456.4%−40.648.6%514
54.7%
 Protector 1.8.0 64-bit 4CPU3123+28−2750.4%−1.954.7%386
51.3%
 ChessBrainVB 3.68 4CPU3122+26−2649.2%+4.251.6%428
50.4%
 Gull 3.1 64-bit 4CPU3122+30−3045.4%+33.245.1%359
57.2%
 Arasan 20.4.1 64-bit 4CPU3118+26−2551.7%−10.450.2%452
54.9%
 Sting SF 5 64-bit 4CPU3116+25−2548.1%+12.754.0%465
57.5%
 Stockfish 1.9.1 64-bit 4CPU3113+22−2260.3%−70.246.9%651
52.8%
19IvanHoe 9.46h 64-bit 4CPU3112+14−1453.2%−19.659.5%1542
51.6%
 Stockfish 2.1.1 64-bit 4CPU3111+27−2754.7%−28.748.3%406
59.0%
20Senpai 2.0 64-bit 4CPU3107+19−1950.9%−7.748.8%852
49.5%
 Sting SF 3 64-bit 4CPU3107+21−2147.7%+12.258.5%644
51.5%
 Sting SF 9 64-bit 4CPU3107+28−2848.0%+10.747.2%381
50.0%
 Stockfish 1.8 64-bit 4CPU3107+18−1860.4%−70.850.6%942
51.1%
 Sting SF 2 64-bit 4CPU3106+27−2748.8%+8.658.1%375
50.3%
21Winter 0.7 64-bit 4CPU3106+25−2645.1%+31.747.1%463
53.6%
 ChessBrainVB 3.66 4CPU3104+28−2854.2%−26.848.7%378
54.9%
 Stockfish 1.7.1 64-bit 4CPU3102+19−1960.4%−67.952.6%882
53.7%
 Xiphos 0.2.2 64-bit 4CPU3101+26−2647.3%+13.653.6%414
58.9%
 Gull 2.2 64-bit 4CPU3096+25−2544.5%+31.554.8%469
52.3%
 Vajolet2 2.5 64-bit 4CPU3095+24−2451.5%−9.354.0%493
54.7%
 Nemorino 4.00 64-bit 4CPU3093+22−2250.0%+1.852.9%624
51.3%
 Sting SF 4 64-bit 4CPU3093+23−2341.9%+48.948.9%562
62.4%
 Arasan 20.3 64-bit 4CPU3086+32−3252.5%−19.547.4%302
50.3%
 Laser 1.4 64-bit 4CPU3086+19−1949.6%+0.745.7%843
60.3%
 Texel 1.05 64-bit 4CPU3083+17−1747.3%+18.551.4%1016
76.9%
 Protector 1.7.0 64-bit 4CPU3073+19−1944.1%+37.150.6%834
52.0%
 Demolito 2019-04-27 64-bit 4CPU3072+66−6650.0%−0.738.9%72
50.3%
22Amoeba 3.1 64-bit 4CPU3071+34−3442.1%+48.449.6%254
52.4%
 Nemorino 3.0 64-bit 4CPU3070+27−2747.9%+13.046.1%427
51.6%
 Protector 1.6.0 64-bit 4CPU3069+21−2243.2%+44.650.2%656
52.1%
23Rodent III 0.238 64-bit 4CPU3068+20−2047.2%+15.350.0%742
54.3%
 Rodent III 0.276 64-bit 4CPU3066+29−2949.6%+3.958.2%337
52.5%
 RubiChess 1.3 64-bit 4CPU3065+22−2252.8%−17.644.2%642
54.9%
 Defenchess 1.1f 64-bit 4CPU3064+18−1851.7%−12.545.3%916
49.2%
24Demolito 2018-10-29 64-bit 4CPU3064+30−3048.6%+5.251.9%322
54.5%
25Topple 0.7.5 64-bit 4CPU3061+28−2852.0%−12.446.1%384
60.9%
 Texel 1.04 64-bit 4CPU3056+21−2143.1%+43.447.8%722
56.5%
 Protector 1.5.0 64-bit 4CPU3054+18−1842.5%+47.847.4%952
55.5%
 Amoeba 3.0 64-bit 4CPU3052+26−2654.8%−32.444.8%466
56.1%
 Ethereal 9.00 64-bit 4CPU3049+23−2346.8%+19.045.1%570
65.2%
 Arasan 19.2 64-bit 4CPU3041+31−3151.0%−6.354.8%305
51.3%
 Vajolet2 2.2 64-bit 4CPU3041+27−2747.0%+14.648.7%423
48.9%
 Vajolet2 2.4 64-bit 4CPU3041+19−1947.2%+18.245.7%878
60.0%
 Gull R375 64-bit 4CPU3037+22−2243.4%+37.457.4%605
53.6%
 Stockfish 1.6.3 64-bit 4CPU3036+22−2257.5%−50.145.3%651
67.4%
 Arasan 20.0 64-bit 4CPU3027+30−3047.4%+16.653.4%328
51.6%
 Vajolet2 2.3 64-bit 4CPU3026+31−3145.2%+25.653.5%303
53.8%
26‑27Bobcat 8.0 64-bit 4CPU3024+21−2148.3%+11.653.5%636
50.2%
26‑27Pirarucu 2.7.4 64-bit 4CPU3024+21−2053.6%−26.947.6%735
52.6%
 Pirarucu 2.9.5 64-bit 4CPU3023+33−3350.0%−2.353.2%269
52.0%
 Senpai 1.0 64-bit 4CPU3022+16−1746.2%+21.053.5%1095
64.2%
 Winter 0.6 64-bit 4CPU3015+32−3253.0%−27.635.6%329
55.5%
28Crafty 25.2 64-bit 4CPU3013+16−1648.5%+8.742.5%1279
51.5%
29chess22k 1.10 64-bit 4CPU3012+22−2246.7%+16.543.7%680
52.7%
 Nemorino 2.00 64-bit 4CPU3011+30−3047.0%+16.059.6%302
50.4%
 Arasan 19.0.1 64-bit 4CPU3010+32−3151.3%−11.540.9%318
52.5%
 Laser 1.3 64-bit 4CPU3009+30−2947.2%+15.655.8%321
50.7%
 Texel 1.03 64-bit 4CPU3009+31−3150.3%−1.847.0%313
50.4%
30Cheng 4.39 64-bit 4CPU3008+15−1549.4%+4.648.6%1333
76.9%
 Vajolet2 2.1 64-bit 4CPU2998+25−2550.9%−4.348.5%462
54.2%
 Rodent III 0.210 64-bit 4CPU2995+28−2845.1%+33.342.5%402
74.2%
31Scorpio 2.8 64-bit 4CPU2983+25−2548.8%+6.646.3%492
53.6%
 Protector 1.4.0 64-bit 4CPU2981+19−1942.5%+49.342.9%912
55.1%
 Cheng4 0.38 64-bit 4CPU2979+24−2446.0%+23.542.4%531
53.5%
 Bobcat 7.6 64-bit 4CPU2977+31−3148.6%+9.241.8%318
59.5%
 Arasan 18.3 64-bit 4CPU2972+30−3046.6%+20.546.8%327
54.0%
32EXchess 7.97b 64-bit 4CPU2970+17−1847.4%+18.745.9%1017
51.7%
 Arasan 18.2 64-bit 4CPU2969+28−2851.9%−14.450.3%388
53.2%
 Stockfish 1.5.1 64-bit 4CPU2968+25−2453.7%−23.447.7%495
63.3%
 Demolito 2017-08-26 64-bit 4CPU2962+21−2140.2%+63.640.8%748
49.9%
 Winter 0.5 64-bit 4CPU2962+26−2650.4%−5.338.3%470
53.4%
 Protector 1.3.6 64-bit 4CPU2960+32−3246.6%+18.844.3%307
58.0%
 EXchess 7.88b 64-bit 4CPU2956+29−2945.4%+29.548.6%356
49.2%
33Toga II 4.0 64-bit 4CPU2956+19−1941.4%+57.240.4%958
68.7%
 Crafty 25.0 64-bit 4CPU2948+25−2548.1%+13.047.9%468
54.8%
 Stockfish 1.4 64-bit 4CPU2946+17−1754.2%−28.442.2%1131
55.1%
 Scorpio 2.7.9 64-bit 4CPU2944+22−2246.7%+21.440.5%659
58.5%
34Tucano 7.07 64-bit 4CPU2940+33−3351.5%−9.844.7%291
52.0%
 EXchess 7.51b 64-bit 4CPU2939+32−3249.5%+4.845.6%296
57.1%
35Marvin 3.3.2 64-bit 4CPU2934+36−3743.4%+40.344.7%228
51.3%
 Arasan 17.5 64-bit 4CPU2933+27−2748.4%+10.545.1%406
55.0%
 EXchess 7.71b 64-bit 4CPU2931+28−2853.3%−22.943.2%403
51.7%
 Bobcat 7.1 64-bit 4CPU2930+31−3147.5%+16.145.9%314
50.6%
 Ethereal 8.62 64-bit 4CPU2930+22−2244.2%+35.449.7%600
60.0%
 Arasan 18.0 64-bit 4CPU2925+29−2947.2%+15.541.5%378
58.4%
 Marvin 3.2.0 64-bit 4CPU2921+21−2153.7%−26.343.0%698
58.8%
 Toga II 3.0 4CPU2917+22−2345.6%+27.649.0%592
68.6%
 Crafty 23.8 64-bit 4CPU2908+32−3345.8%+26.947.0%287
60.7%
 Toga II 1.4.1SE 4CPU2903+13−1348.5%+10.541.6%2041
51.1%
 Asymptote 0.6 64-bit 4CPU2902+95−9548.3%+2.756.7%30
54.6%
 Cheng4 0.36c 64-bit 4CPU2895+30−3048.8%+6.746.6%326
52.6%
36Glaurung 2.2 64-bit 4CPU2894+16−1647.0%+19.440.7%1259
70.8%
37Octochess r5506 64-bit 4CPU2887+21−2144.5%+35.646.7%715
56.3%
38MinkoChess 1.3 64-bit 4CPU2884+21−2146.0%+24.943.7%725
51.2%
 Toga II 1.4 beta5c 4CPU2884+18−1851.7%−11.945.8%996
64.9%
 Crafty 24.1 64-bit 4CPU2877+31−3243.5%+41.139.1%322
56.8%
 Scorpio 2.7.6 64-bit 4CPU2873+26−2647.4%+16.944.0%445
64.5%
 Glaurung 2.1 64-bit 4CPU2867+19−1942.8%+50.841.3%946
53.7%
 Bobcat 6.4b 64-bit 4CPU2865+27−2748.3%+11.946.5%415
53.4%
 EXchess 7.18b 64-bit 4CPU2864+33−3347.3%+16.238.4%292
57.9%
 Scorpio 2.7.5 64-bit 4CPU2859+33−3345.7%+24.450.0%266
53.7%
 Arasan 16.3 64-bit 4CPU2857+34−3449.1%+4.040.2%276
49.0%
 Crafty 23.4 64-bit 4CPU2857+34−3446.9%+19.635.7%272
56.6%
39Monolith 1.0 64-bit 4CPU2854+22−2148.6%+8.043.0%693
48.8%
 Scorpio 2.7.7 64-bit 4CPU2854+32−3242.9%+45.041.3%310
54.2%
40Counter 3.2 64-bit 4CPU2852+32−3250.7%−4.840.2%301
57.0%
 Igel 1.9.0 64-bit 4CPU2848+31−3241.0%+59.239.5%324
69.9%
 Crafty 23.3 64-bit 4CPU2836+31−3241.5%+55.138.2%325
66.5%
 Glaurung 2.0.1 64-bit 4CPU2828+17−1743.8%+38.643.5%1100
65.6%
 Octochess r5190 64-bit 4CPU2822+24−2445.9%+23.744.5%555
91.6%
 Crafty 23.1 64-bit 4CPU2790+36−3743.8%+43.336.9%241
53.7%
 Laser 1.0 64-bit 4CPU2788+37−3836.3%+89.639.2%227
58.4%
 Bagatur 1.7a 64-bit 4CPU2773+131−13445.0%+31.020.0%20
54.9%
 Glaurung 1.2.1 64-bit 4CPU2765+19−1940.2%+63.838.1%967
69.1%
 Crafty 23.0 64-bit 4CPU2758+18−1839.0%+77.534.1%1042
68.9%
41Fridolin 3.10 64-bit 4CPU2748+33−3349.5%−0.331.5%308
78.4%
 Scorpio 2.0 32-bit 4CPU2731+24−2433.4%+114.636.7%607
76.2%
 Scorpio 2.1 64-bit 4CPU2718+27−2734.4%+109.131.6%490
80.3%
 Igel 1.4.1 64-bit 4CPU2700+28−2850.7%−6.326.3%448
81.1%
42RedQueen 1.1.98 64-bit 4CPU2683+27−2739.4%+80.128.5%494
88.0%
 RedQueen 1.1.97 64-bit 4CPU2662+22−2245.7%+26.733.3%726
100.0%
 Fridolin 2.00 64-bit 4CPU2588+34−3441.9%+57.131.3%297
95.1%
43Jazz 840 64-bit 4CPU2554+20−2057.8%−64.225.3%1000
91.6%
44Nemeton 1.8 4CPU2530+27−2749.9%+1.627.2%496
92.5%
 Invictus r228 64-bit 4CPU2340+242−29528.6%+167.40.0%7
 

Results matrix

Open source 4-CPU engines (best versions only), top 12
#NameElo123456789101112
1Stockfish 2021-01-11 64-bit 4CPU3551 24.5 − 9.5
+15−0=19
−22
39 − 11
+28−0=22
+20
36.5 − 13.5
+23−0=27
−30
   43 − 7
+36−0=14
+46
    
2Igel 3.0.0 64-bit 4CPU34009.5 − 24.5
+0−15=19
+22
 14.5 − 17.5
+1−4=27
−30
15 − 15
+5−5=20
−16
17 − 15
+3−1=28
−28
18.5 − 11.5
+8−1=21
−2
29.5 − 16.5
+15−2=29
+8
19.5 − 8.5
+13−2=13
+51
    
3Ethereal 12.75 64-bit 4CPU339211 − 39
+0−28=22
−20
17.5 − 14.5
+4−1=27
+30
 17 − 15
+5−3=24
+6
19 − 13
+7−1=24
+14
21 − 17
+7−3=28
−29
15.5 − 10.5
+6−1=19
−9
17.5 − 12.5
+6−1=23
−19
20.5 − 9.5
+11−0=19
−6
21.5 − 8.5
+13−0=17
+10
  
4Nemorino 6.00 64-bit 4CPU338413.5 − 36.5
+0−23=27
+30
15 − 15
+5−5=20
+16
15 − 17
+3−5=24
−6
 15 − 17
+2−4=26
−42
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
−21
  
5RubiChess 2.0 64-bit 4CPU3357 15 − 17
+1−3=28
+28
13 − 19
+1−7=24
−14
17 − 15
+4−2=26
+42
 19.5 − 14.5
+8−3=23
+16
12.5 − 13.5
+3−4=19
−35
17.5 − 14.5
+4−1=27
−4
    
6Lc0 0.27.0 w703810 64-bit 4CPU3335 11.5 − 18.5
+1−8=21
+2
17 − 21
+3−7=28
+29
19.5 − 32.5
+7−20=25
−26
14.5 − 19.5
+3−8=23
−16
 49 − 43
+22−16=54
+13
19.5 − 14.5
+10−5=19
+36
    
7Booot 6.5 64-bit 4CPU3331 16.5 − 29.5
+2−15=29
−8
10.5 − 15.5
+1−6=19
+9
 13.5 − 12.5
+4−3=19
+35
43 − 49
+16−22=54
−13
 10.5 − 15.5
+1−6=19
−52
    
8Xiphos 0.6 64-bit 4CPU33307 − 43
+0−36=14
−46
8.5 − 19.5
+2−13=13
−51
12.5 − 17.5
+1−6=23
+19
13 − 19
+2−8=22
+4
14.5 − 17.5
+1−4=27
+4
14.5 − 19.5
+5−10=19
−36
15.5 − 10.5
+6−1=19
+52
 17.5 − 14.5
+7−4=21
−19
20.5 − 11.5
+9−0=23
+23
  
9Laser 1.7 64-bit 4CPU3285  9.5 − 20.5
+0−11=19
+6
10.5 − 21.5
+1−12=19
0
   14.5 − 17.5
+4−7=21
+19
 16 − 16
+6−6=20
−7
  
10Defenchess 2.2 64-bit 4CPU3278  8.5 − 21.5
+0−13=17
−10
11.5 − 20.5
+3−12=17
+21
   11.5 − 20.5
+0−9=23
−23
16 − 16
+6−6=20
+7
  23.5 − 12.5
+11−0=25
+37
11Andscacs 0.94 64-bit 4CPU3260            
12Halogen 10 64-bit 4CPU3235         12.5 − 23.5
+0−11=25
−37
  
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 2021-01-11 64-bit 4CPU3551 100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
2Igel 3.0.0 64-bit 4CPU34000.0 72.987.599.8100.0100.0100.0100.0100.0100.0100.0
3Ethereal 12.75 64-bit 4CPU33920.027.1 75.999.7100.0100.0100.0100.0100.0100.0100.0
4Nemorino 6.00 64-bit 4CPU33840.012.524.1 98.1100.0100.0100.0100.0100.0100.0100.0
5RubiChess 2.0 64-bit 4CPU33570.00.20.31.9 94.695.298.8100.0100.0100.0100.0
6Lc0 0.27.0 w703810 64-bit 4CPU33350.00.00.00.05.4 61.568.0100.0100.0100.0100.0
7Booot 6.5 64-bit 4CPU33310.00.00.00.04.838.5 53.199.9100.0100.0100.0
8Xiphos 0.6 64-bit 4CPU33300.00.00.00.01.232.046.9 100.0100.0100.0100.0
9Laser 1.7 64-bit 4CPU32850.00.00.00.00.00.00.10.0 76.798.599.8
10Defenchess 2.2 64-bit 4CPU32780.00.00.00.00.00.00.00.023.3 93.499.4
11Andscacs 0.94 64-bit 4CPU32600.00.00.00.00.00.00.00.01.56.6 91.0
12Halogen 10 64-bit 4CPU32350.00.00.00.00.00.00.00.00.20.69.0 
LOS color legend:
0 10 20 30 40 50 60 70 80 90 100

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Results table
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LOS table
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Created in 2005-2013 by CCRL team
Last games added on April 18, 2021