CCRL 40/15
Downloads and Statistics
January 16, 2021
Testing summary:
Total: 1'206'633 games
played by 2'770 programs

White wins: 414'929 (34.4%)
Black wins: 305'861 (25.3%)
Draws: 485'843 (40.3%)
White score: 54.5%

Open source 4-CPU engines

Comparing 199 engines!
42 best versions of selected engines played 2638 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 January 16, 2021 with Bayeselo based on 1'206'633 games

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+
1ShashChess 15.0 64-bit 4CPU3534+27−2676.5%−175.146.9%490 
87.4%
 Stockfish 12 64-bit 4CPU3516+21−2072.5%−145.254.4%757
92.4%
 Stockfish 2019-10-09 64-bit 4CPU3493+23−2374.7%−156.250.3%616
77.8%
 Stockfish 11 64-bit 4CPU3481+20−1973.0%−142.952.6%840
74.5%
 SugaR NN 1.1 64-bit 4CPU3473+16−1570.7%−132.252.5%1322
78.4%
 Stockfish 10 64-bit 4CPU3464+17−1673.4%−155.750.3%1227
54.9%
 SugaR 1.6.1 64-bit 4CPU3462+25−2569.0%−118.357.4%479
68.0%
 Stockfish 270918 64-bit 4CPU3453+28−2777.9%−189.243.3%457
69.2%
 ShashChess 8.0 64-bit 4CPU3445+16−1565.8%−94.463.7%1206
79.0%
 SugaR XPrO 1.5.3 64-bit 4CPU3433+24−2471.8%−144.551.3%544
55.1%
 Stockfish 9 64-bit 4CPU3431+15−1572.3%−153.650.5%1423
95.5%
 SugaR XPrO 1.4 64-bit 4CPU3410+20−1972.3%−150.351.8%840
55.4%
 asmFish 051117 64-bit 4CPU3408+20−1969.8%−130.255.7%819
75.3%
 SugaR XPrO 1.2 64-bit 4CPU3398+21−2070.4%−135.952.5%754
62.7%
2Ethereal 12.75 64-bit 4CPU3393+21−2152.9%−15.170.3%630
53.9%
 ShashChess Pro 1.0 64-bit 4CPU3391+33−3365.6%−93.661.7%256
74.4%
3Nemorino 6.00 64-bit 4CPU3377+26−2554.7%−34.961.0%438
48.7%
 Stockfish 8 64-bit 4CPU3377+14−1465.1%−96.162.1%1647
64.8%
 SugaR XPrO 1.3 64-bit 4CPU3372+23−2266.0%−102.657.4%598
66.1%
 Ethereal 12.25 64-bit 4CPU3366+22−2249.3%+5.171.0%544
61.2%
4Igel 2.8.0 64-bit 4CPU3360+28−2761.8%−66.161.3%359
67.5%
 Ethereal 12.00 64-bit 4CPU3352+22−2250.9%−3.168.8%564
62.8%
 Ethereal 11.75 64-bit 4CPU3347+21−2147.3%+15.265.0%614
74.1%
5Xiphos 0.6 64-bit 4CPU3339+15−1645.1%+30.266.4%1128
83.1%
 Ethereal 11.53 64-bit 4CPU3325+23−2252.3%−12.864.0%542
49.4%
 Stockfish 7 64-bit 4CPU3325+15−1567.0%−105.557.3%1304
85.4%
 Xiphos 0.5 64-bit 4CPU3311+20−2046.1%+25.366.7%673
78.5%
6Booot 6.4 64-bit 4CPU3300+17−1739.5%+62.963.9%957
52.0%
 Ethereal 11.25 64-bit 4CPU3299+21−2246.3%+24.265.5%588
53.6%
 Ethereal 11.00 64-bit 4CPU3298+19−1947.0%+18.163.2%778
59.8%
7RubiChess 1.8 64-bit 4CPU3294+20−2035.0%+90.961.9%712
60.7%
 RubiChess 1.7.3 64-bit 4CPU3291+20−2048.3%+9.462.4%736
52.0%
8Laser 1.7 64-bit 4CPU3290+14−1342.0%+48.862.7%1597
48.6%
 Stockfish 6 64-bit 4CPU3290+14−1465.3%−94.057.3%1542
80.3%
9Defenchess 2.2 64-bit 4CPU3280+15−1540.4%+60.860.0%1245
67.1%
 Ethereal 10.55 64-bit 4CPU3274+24−2449.8%−2.157.4%488
63.9%
 Stockfish 5 64-bit 4CPU3268+15−1567.7%−109.154.0%1346
66.8%
10Andscacs 0.95 64-bit 4CPU3263+17−1742.3%+47.559.3%943
53.4%
 Andscacs 0.94 64-bit 4CPU3262+18−1847.2%+18.054.2%907
51.3%
 Booot 6.3.1 64-bit 4CPU3261+15−1543.0%+44.657.4%1366
83.3%
 Xiphos 0.4 64-bit 4CPU3250+19−1943.8%+39.461.1%830
80.8%
 Andscacs 0.921 64-bit 4CPU3239+16−1650.7%−6.747.5%1225
52.1%
 Andscacs 0.93 64-bit 4CPU3238+18−1842.9%+45.654.8%938
65.8%
 Stockfish DD 64-bit 4CPU3233+17−1763.0%−78.456.1%1032
63.0%
 RubiChess 1.6 64-bit 4CPU3228+25−2559.5%−59.050.9%466
70.7%
11Arasan 21.4 64-bit 4CPU3218+25−2545.0%+25.855.6%464
54.2%
 Booot 6.2 64-bit 4CPU3216+14−1442.9%+46.459.3%1517
50.0%
 Laser 1.6 64-bit 4CPU3216+16−1643.5%+43.955.2%1124
81.5%
 Stockfish 4 64-bit 4CPU3205+16−1660.1%−60.059.1%1086
69.9%
 Arasan 21.3 64-bit 4CPU3196+30−3046.7%+25.755.7%314
65.3%
 Ethereal 10.00 64-bit 4CPU3188+20−2053.4%−22.950.8%788
60.5%
12Vajolet2 2.7 64-bit 4CPU3184+25−2552.3%−14.155.8%459
61.5%
13Gull 3 64-bit 4CPU3180+9−942.5%+48.154.2%3783
58.5%
 Gull 2.8b 64-bit 4CPU3178+19−1949.1%+3.251.8%797
49.8%
 Xiphos 0.3 64-bit 4CPU3178+21−2149.2%+3.054.2%660
64.0%
 Arasan 21.2 64-bit 4CPU3171+30−3052.2%−12.460.6%302
58.6%
 Booot 6.1 64-bit 4CPU3167+20−2042.0%+49.060.3%726
50.0%
14ChessBrainVB 3.72 4CPU3167+30−3045.0%+30.351.3%320
50.6%
 Arasan 21.1 64-bit 4CPU3166+27−2751.2%−7.259.5%383
51.5%
 Stockfish 3 64-bit 4CPU3166+21−2156.0%−35.757.8%663
51.3%
 ChessBrainVB 3.74 4CPU3163+128−13046.9%+18.056.3%16
50.6%
 RubiChess 1.5 64-bit 4CPU3162+29−2952.4%−13.854.3%348
78.7%
 Nemorino 5.00 64-bit 4CPU3149+18−1848.1%+9.552.3%878
57.5%
 Stockfish 2.2.2 64-bit 4CPU3146+16−1659.2%−56.453.4%1141
62.1%
 Laser 1.5 64-bit 4CPU3142+20−2049.4%+8.154.5%723
51.9%
 Gull 2.3 64-bit 4CPU3141+17−1747.4%+15.159.3%982
49.5%
 Stockfish 2.3.1 64-bit 4CPU3141+19−1955.4%−32.752.5%846
53.3%
15Texel 1.07 64-bit 4CPU3140+14−1449.5%+5.749.2%1620
59.0%
16Protector 1.9.0 64-bit 4CPU3138+15−1546.4%+24.853.9%1338
58.6%
 Vajolet2 2.6.1 64-bit 4CPU3135+21−2150.8%−4.560.3%605
55.5%
 Igel 2.3.1 64-bit 4CPU3133+27−2750.2%−2.553.2%406
54.1%
 Sting SF 4.8.4 64-bit 4CPU3131+29−2953.3%−21.262.4%330
49.1%
 Sting SF 6 64-bit 4CPU3131+28−2850.8%−6.461.0%354
50.2%
 Texel 1.06 64-bit 4CPU3131+20−2046.1%+25.353.6%739
62.3%
 Stockfish 2.0.1 64-bit 4CPU3126+24−2456.4%−40.748.6%514
55.1%
 Protector 1.8.0 64-bit 4CPU3124+28−2750.4%−2.154.7%386
51.2%
 ChessBrainVB 3.68 4CPU3123+26−2649.2%+4.051.6%428
49.9%
 Gull 3.1 64-bit 4CPU3123+30−3045.4%+33.445.1%359
57.5%
 Arasan 20.4.1 64-bit 4CPU3119+26−2551.7%−10.450.2%452
55.2%
 Sting SF 5 64-bit 4CPU3117+25−2548.1%+12.454.0%465
57.0%
 Stockfish 1.9.1 64-bit 4CPU3114+22−2260.9%−73.946.6%639
53.7%
17IvanHoe 9.46h 64-bit 4CPU3112+14−1453.2%−18.959.5%1542
51.0%
 Stockfish 2.1.1 64-bit 4CPU3112+27−2754.7%−28.948.3%406
60.1%
18Senpai 2.0 64-bit 4CPU3108+19−1951.5%−12.048.7%816
48.6%
 Sting SF 3 64-bit 4CPU3108+21−2147.7%+11.958.5%644
50.3%
 Sting SF 9 64-bit 4CPU3108+28−2848.0%+11.047.2%381
52.0%
 Sting SF 2 64-bit 4CPU3107+27−2748.8%+8.358.1%375
49.2%
19Winter 0.7 64-bit 4CPU3107+25−2645.1%+31.947.1%463
52.1%
 Stockfish 1.8 64-bit 4CPU3106+18−1860.8%−73.250.4%918
53.1%
 ChessBrainVB 3.66 4CPU3105+28−2854.2%−27.148.7%378
55.6%
 Stockfish 1.7.1 64-bit 4CPU3103+18−1960.4%−68.652.6%882
52.8%
 Xiphos 0.2.2 64-bit 4CPU3101+26−2647.3%+14.553.6%414
59.3%
 Gull 2.2 64-bit 4CPU3097+25−2544.5%+31.254.8%469
51.9%
 Vajolet2 2.5 64-bit 4CPU3096+24−2451.5%−9.554.0%493
54.8%
 Nemorino 4.00 64-bit 4CPU3094+22−2250.0%+1.652.9%624
51.2%
 Sting SF 4 64-bit 4CPU3094+23−2341.9%+48.648.9%562
62.2%
 Arasan 20.3 64-bit 4CPU3087+32−3252.5%−19.847.4%302
50.3%
 Laser 1.4 64-bit 4CPU3087+19−1949.6%+0.545.7%843
60.6%
 Texel 1.05 64-bit 4CPU3084+17−1747.3%+18.251.4%1016
76.8%
 Protector 1.7.0 64-bit 4CPU3074+19−1944.1%+36.850.6%834
51.6%
 Demolito 2019-04-27 64-bit 4CPU3073+66−6650.0%−0.338.9%72
51.0%
20Amoeba 3.1 64-bit 4CPU3072+34−3442.1%+47.849.6%254
51.4%
 Nemorino 3.0 64-bit 4CPU3071+27−2747.9%+12.746.1%427
51.9%
 Protector 1.6.0 64-bit 4CPU3070+21−2243.2%+44.350.2%656
51.9%
21Rodent III 0.238 64-bit 4CPU3069+20−2047.2%+15.050.0%742
53.8%
 Rodent III 0.276 64-bit 4CPU3068+29−2949.6%+3.158.2%337
53.3%
 RubiChess 1.3 64-bit 4CPU3066+22−2252.8%−18.044.2%642
52.7%
22Demolito 2018-10-29 64-bit 4CPU3065+30−3048.6%+5.051.9%322
51.2%
 Defenchess 1.1f 64-bit 4CPU3064+18−1851.7%−11.745.3%916
59.2%
23Topple 0.7.5 64-bit 4CPU3060+29−2953.2%−19.745.3%360
56.1%
 Texel 1.04 64-bit 4CPU3057+21−2143.1%+43.047.8%722
56.7%
 Protector 1.5.0 64-bit 4CPU3055+18−1842.5%+47.447.4%952
55.9%
 Amoeba 3.0 64-bit 4CPU3052+26−2654.8%−32.044.8%466
56.0%
 Ethereal 9.00 64-bit 4CPU3050+23−2346.8%+18.445.1%570
64.9%
 Arasan 19.2 64-bit 4CPU3042+31−3151.0%−6.654.8%305
50.3%
 Vajolet2 2.4 64-bit 4CPU3042+19−1947.2%+17.945.7%878
51.3%
 Vajolet2 2.2 64-bit 4CPU3041+27−2747.0%+15.448.7%423
57.5%
 Gull R375 64-bit 4CPU3038+22−2243.4%+37.157.4%605
54.2%
 Stockfish 1.6.3 64-bit 4CPU3036+22−2257.5%−49.845.3%651
66.5%
 Arasan 20.0 64-bit 4CPU3028+29−3047.4%+16.353.4%328
51.9%
 Vajolet2 2.3 64-bit 4CPU3027+31−3145.2%+25.353.5%303
53.9%
24‑25Bobcat 8.0 64-bit 4CPU3025+21−2148.3%+11.353.5%636
51.3%
24‑25Pirarucu 2.7.4 64-bit 4CPU3025+21−2053.6%−27.747.6%735
52.0%
 Pirarucu 2.9.5 64-bit 4CPU3024+33−3350.0%−2.553.2%269
51.8%
 Senpai 1.0 64-bit 4CPU3023+16−1746.2%+20.653.5%1095
64.1%
 Winter 0.6 64-bit 4CPU3016+32−3253.0%−27.735.6%329
55.6%
26‑27Crafty 25.2 64-bit 4CPU3013+16−1648.5%+9.442.5%1279
51.6%
26‑27chess22k 1.10 64-bit 4CPU3013+22−2246.7%+16.143.7%680
53.4%
 Arasan 19.0.1 64-bit 4CPU3011+32−3151.3%−12.140.9%318
49.2%
 Nemorino 2.00 64-bit 4CPU3011+30−3047.0%+16.759.6%302
53.2%
 Laser 1.3 64-bit 4CPU3010+30−3047.2%+15.155.8%321
51.6%
28Cheng 4.39 64-bit 4CPU3009+15−1549.4%+4.148.6%1333
49.6%
 Texel 1.03 64-bit 4CPU3009+31−3150.3%−1.147.0%313
70.6%
 Vajolet2 2.1 64-bit 4CPU2998+25−2550.9%−3.748.5%462
53.9%
 Rodent III 0.210 64-bit 4CPU2996+28−2845.1%+33.042.5%402
74.8%
29Scorpio 2.8 64-bit 4CPU2983+25−2548.8%+7.046.3%492
53.2%
 Protector 1.4.0 64-bit 4CPU2982+19−1942.5%+48.842.9%912
55.0%
 Cheng4 0.38 64-bit 4CPU2980+24−2446.0%+23.142.4%531
53.6%
 Bobcat 7.6 64-bit 4CPU2978+31−3148.6%+8.841.8%318
59.5%
 Arasan 18.3 64-bit 4CPU2972+30−3046.6%+21.046.8%327
54.9%
 Arasan 18.2 64-bit 4CPU2970+28−2851.9%−14.950.3%388
48.7%
30EXchess 7.97b 64-bit 4CPU2970+17−1847.4%+19.145.9%1017
55.6%
 Stockfish 1.5.1 64-bit 4CPU2968+25−2453.7%−23.047.7%495
62.8%
 Demolito 2017-08-26 64-bit 4CPU2963+21−2140.2%+63.140.8%748
50.2%
 Winter 0.5 64-bit 4CPU2963+26−2650.4%−5.838.3%470
53.4%
 Protector 1.3.6 64-bit 4CPU2961+32−3246.6%+18.244.3%307
58.3%
31Toga II 4.0 64-bit 4CPU2957+19−1841.4%+56.640.4%958
50.8%
 EXchess 7.88b 64-bit 4CPU2956+29−2945.4%+29.948.6%356
65.2%
 Crafty 25.0 64-bit 4CPU2949+25−2548.1%+12.447.9%468
55.2%
 Stockfish 1.4 64-bit 4CPU2947+17−1754.2%−29.142.2%1131
54.7%
 Scorpio 2.7.9 64-bit 4CPU2945+22−2246.7%+20.740.5%659
59.2%
32Tucano 7.07 64-bit 4CPU2940+33−3351.5%−9.744.7%291
51.7%
 EXchess 7.51b 64-bit 4CPU2939+32−3249.5%+5.345.6%296
57.0%
33Marvin 3.3.2 64-bit 4CPU2935+36−3743.4%+39.944.7%228
51.2%
 Arasan 17.5 64-bit 4CPU2934+27−2748.4%+10.045.1%406
55.0%
 EXchess 7.71b 64-bit 4CPU2931+28−2853.3%−22.543.2%403
51.8%
 Bobcat 7.1 64-bit 4CPU2930+31−3147.5%+16.445.9%314
50.4%
 Ethereal 8.62 64-bit 4CPU2930+22−2244.2%+35.949.7%600
60.0%
 Arasan 18.0 64-bit 4CPU2925+29−2947.2%+16.141.5%378
58.8%
 Marvin 3.2.0 64-bit 4CPU2921+21−2153.7%−26.243.0%698
58.4%
 Toga II 3.0 4CPU2918+22−2345.6%+27.149.0%592
68.9%
 Crafty 23.8 64-bit 4CPU2908+32−3345.8%+27.447.0%287
60.7%
 Toga II 1.4.1SE 4CPU2903+13−1348.5%+10.841.6%2041
51.0%
 Asymptote 0.6 64-bit 4CPU2902+95−9548.3%+3.056.7%30
54.6%
 Cheng4 0.36c 64-bit 4CPU2896+30−3048.8%+6.246.6%326
52.8%
34Glaurung 2.2 64-bit 4CPU2895+16−1647.0%+18.740.7%1259
71.0%
35Octochess r5506 64-bit 4CPU2887+21−2144.5%+35.846.7%715
55.9%
36MinkoChess 1.3 64-bit 4CPU2885+21−2146.0%+24.343.7%725
51.8%
 Toga II 1.4 beta5c 4CPU2884+18−1851.7%−11.745.8%996
64.4%
 Crafty 24.1 64-bit 4CPU2877+31−3243.5%+41.639.1%322
56.9%
 Scorpio 2.7.6 64-bit 4CPU2874+26−2647.4%+16.344.0%445
64.6%
 Glaurung 2.1 64-bit 4CPU2867+19−1942.8%+51.141.3%946
53.6%
 Bobcat 6.4b 64-bit 4CPU2866+27−2748.3%+11.346.5%415
53.4%
 EXchess 7.18b 64-bit 4CPU2864+33−3347.3%+16.638.4%292
57.8%
 Scorpio 2.7.5 64-bit 4CPU2859+33−3345.7%+24.950.0%266
53.7%
 Arasan 16.3 64-bit 4CPU2857+34−3449.1%+4.440.2%276
49.0%
 Crafty 23.4 64-bit 4CPU2857+34−3446.9%+20.035.7%272
54.7%
 Scorpio 2.7.7 64-bit 4CPU2855+32−3242.9%+44.541.3%310
51.5%
37Monolith 1.0 64-bit 4CPU2854+22−2148.6%+8.143.0%693
53.6%
38Counter 3.2 64-bit 4CPU2852+32−3250.7%−4.640.2%301
56.9%
 Igel 1.9.0 64-bit 4CPU2848+31−3241.0%+59.539.5%324
70.0%
 Crafty 23.3 64-bit 4CPU2836+31−3241.5%+55.438.2%325
66.8%
 Glaurung 2.0.1 64-bit 4CPU2828+17−1743.8%+38.843.5%1100
65.3%
 Octochess r5190 64-bit 4CPU2822+24−2445.9%+24.044.5%555
91.7%
 Crafty 23.1 64-bit 4CPU2790+36−3743.8%+43.536.9%241
53.4%
 Laser 1.0 64-bit 4CPU2788+37−3836.3%+89.939.2%227
58.5%
 Bagatur 1.7a 64-bit 4CPU2773+131−13445.0%+31.220.0%20
54.9%
 Glaurung 1.2.1 64-bit 4CPU2765+19−1940.2%+64.038.1%967
69.0%
 Crafty 23.0 64-bit 4CPU2758+18−1839.0%+77.834.1%1042
68.8%
39Fridolin 3.10 64-bit 4CPU2748+33−3349.5%−0.231.5%308
78.4%
 Scorpio 2.0 32-bit 4CPU2731+24−2433.4%+114.836.7%607
76.2%
 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%−7.126.3%448
81.1%
40RedQueen 1.1.98 64-bit 4CPU2683+27−2739.4%+80.228.5%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%+57.331.3%297
95.2%
41Jazz 840 64-bit 4CPU2554+20−2057.8%−64.225.3%1000
91.5%
42Nemeton 1.8 4CPU2530+27−2749.9%+1.727.2%496
92.5%
 Invictus r228 64-bit 4CPU2341+242−29528.6%+166.40.0%7
 

Results matrix

Open source 4-CPU engines (best versions only), top 12
#NameElo123456789101112
1ShashChess 15.0 64-bit 4CPU3534 21 − 11
+10−0=22
−55
20 − 6
+14−0=12
+10
 26 − 6
+20−0=12
+15
25 − 7
+18−0=14
−53
28 − 4
+24−0=8
+48
27.5 − 4.5
+23−0=9
+22
    
2Ethereal 12.75 64-bit 4CPU339311 − 21
+0−10=22
+55
 13.5 − 12.5
+4−3=19
−8
 17.5 − 12.5
+6−1=23
−11
19 − 11
+8−0=22
−22
21.5 − 8.5
+13−0=17
+25
20.5 − 9.5
+11−0=19
−2
21.5 − 8.5
+13−0=17
+11
   
3Nemorino 6.00 64-bit 4CPU33776 − 20
+0−14=12
−10
12.5 − 13.5
+3−4=19
+8
  15.5 − 10.5
+6−1=19
+10
16.5 − 11.5
+6−1=21
−30
14.5 − 11.5
+4−1=21
−52
17 − 9
+9−1=16
−1
16 − 10
+9−3=14
−27
   
4Igel 2.8.0 64-bit 4CPU3360     30.5 − 20.5
+17−7=27
−2
 31 − 20
+15−4=32
−12
29.5 − 21.5
+11−3=37
−39
   
5Xiphos 0.6 64-bit 4CPU33396 − 26
+0−20=12
−15
12.5 − 17.5
+1−6=23
+11
10.5 − 15.5
+1−6=19
−10
  19.5 − 12.5
+7−0=25
+17
18.5 − 13.5
+6−1=25
−5
17.5 − 14.5
+7−4=21
−23
20.5 − 11.5
+9−0=23
+16
   
6Booot 6.4 64-bit 4CPU33007 − 25
+0−18=14
+53
11 − 19
+0−8=22
+22
11.5 − 16.5
+1−6=21
+30
20.5 − 30.5
+7−17=27
+2
12.5 − 19.5
+0−7=25
−17
 14.5 − 17.5
+4−7=21
−34
15 − 17
+4−6=22
−28
16.5 − 15.5
+4−3=25
−12
   
7RubiChess 1.8 64-bit 4CPU32944 − 28
+0−24=8
−48
8.5 − 21.5
+0−13=17
−25
11.5 − 14.5
+1−4=21
+52
 13.5 − 18.5
+1−6=25
+5
17.5 − 14.5
+7−4=21
+34
 15 − 17
+2−4=26
−19
    
8Laser 1.7 64-bit 4CPU32904.5 − 27.5
+0−23=9
−22
9.5 − 20.5
+0−11=19
+2
9 − 17
+1−9=16
+1
20 − 31
+4−15=32
+12
14.5 − 17.5
+4−7=21
+23
17 − 15
+6−4=22
+28
17 − 15
+4−2=26
+19
 16 − 16
+6−6=20
−10
16.5 − 15.5
+5−4=23
−19
7 − 7
+2−2=10
−72
 
9Defenchess 2.2 64-bit 4CPU3280 8.5 − 21.5
+0−13=17
−11
10 − 16
+3−9=14
+27
21.5 − 29.5
+3−11=37
+39
11.5 − 20.5
+0−9=23
−16
15.5 − 16.5
+3−4=25
+12
 16 − 16
+6−6=20
+10
 18.5 − 13.5
+7−2=23
+20
7.5 − 6.5
+3−2=9
−44
 
10Andscacs 0.95 64-bit 4CPU3263       15.5 − 16.5
+4−5=23
+19
13.5 − 18.5
+2−7=23
−20
 7 − 7
+2−2=10
−42
 
11Arasan 21.4 64-bit 4CPU3218       7 − 7
+2−2=10
+72
6.5 − 7.5
+2−3=9
+44
7 − 7
+2−2=10
+42
 7.5 − 6.5
+4−3=7
−11
12Vajolet2 2.7 64-bit 4CPU3184          6.5 − 7.5
+3−4=7
+11
 
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
1ShashChess 15.0 64-bit 4CPU3534 100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
2Ethereal 12.75 64-bit 4CPU33930.0 84.596.9100.0100.0100.0100.0100.0100.0100.0100.0
3Nemorino 6.00 64-bit 4CPU33770.015.5 80.599.5100.0100.0100.0100.0100.0100.0100.0
4Igel 2.8.0 64-bit 4CPU33600.03.119.5 90.8100.0100.0100.0100.0100.0100.0100.0
5Xiphos 0.6 64-bit 4CPU33390.00.00.59.2 100.0100.0100.0100.0100.0100.0100.0
6Booot 6.4 64-bit 4CPU33000.00.00.00.00.0 66.982.695.899.8100.0100.0
7RubiChess 1.8 64-bit 4CPU32940.00.00.00.00.033.1 64.586.298.9100.0100.0
8Laser 1.7 64-bit 4CPU32900.00.00.00.00.017.435.5 82.799.3100.0100.0
9Defenchess 2.2 64-bit 4CPU32800.00.00.00.00.04.213.817.3 93.3100.0100.0
10Andscacs 0.95 64-bit 4CPU32630.00.00.00.00.00.21.10.76.7 99.8100.0
11Arasan 21.4 64-bit 4CPU32180.00.00.00.00.00.00.00.00.00.2 97.0
12Vajolet2 2.7 64-bit 4CPU31840.00.00.00.00.00.00.00.00.00.03.0 
LOS color legend:
0 10 20 30 40 50 60 70 80 90 100

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Rating list
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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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Cross-tables show only best version of each engine
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Reference rating list:
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Created in 2005-2013 by CCRL team
Last games added on January 16, 2021