CCRL 40/4
Downloads and Statistics
April 13, 2019
Testing summary:
Total: 1'978'909 games
played by 2'316 programs
26642 CPU days (X2 4600+)

White wins: 772'756 (39.0%)
Black wins: 624'315 (31.5%)
Draws: 581'838 (29.4%)
White score: 53.8%

Open source 32-bit single-CPU engines

Comparing 234 engines!
124 best versions of selected engines played 13719 games with each other

CCRL 40/4 Rating List — Open source 32-bit single-CPU engines (Quote)

Ponder off, General book (up to 12 moves), 3-4-5 piece EGTB
Time control: Equivalent to 40 moves in 4 minutes on Athlon 64 X2 4600+ (2.4 GHz), about 1.5 minutes on a modern Intel CPU.
Computed on April 13, 2019 with Bayeselo based on 1'978'909 games

Color legend: Commercial, Free, Open source, Private.
Bold font - tested with 300 games or more. Normal font - less than 300 games.

RankNameRatingScoreAverage
Opponent
DrawsGamesLOS
Elo+
1Lc0 0.21.1 w41800 GPU3474+17−1755.7%−37.651.2%1000 
97.6%
 Lc0 0.20.2 w32930 GPU3451+14−1459.2%−60.148.4%1600
100.0%
 ChessBrainVB 3.723133+164−16158.3%−59.250.0%12
95.0%
2ChessBrainVB 3.702999+18−1751.5%−12.534.5%1084
50.2%
 Stockfish 2.0.1 32-bit2998+41−3974.7%−177.630.4%237
71.5%
 ChessBrainVB 3.682984+29−2952.1%−15.133.8%397
65.7%
 ChessBrainVB 3.662977+16−1650.9%−7.036.5%1319
100.0%
 ChessBrainVB 3.602906+32−3253.2%−21.434.2%310
52.0%
 ChessBrainVB 3.502905+15−1549.7%+3.334.2%1510
99.6%
3Toga II 3.02874+17−1754.0%−27.034.2%1204
100.0%
4Booot 5.1.02838+11−1148.2%+14.432.0%3102
74.3%
 ChessBrainVB 3.312829+24−2453.7%−27.729.8%574
66.8%
 Toga II 1.4.1SE2823+10−1050.1%+0.834.0%4172
66.1%
 Toga II 1.4 beta5c2820+14−1348.9%+5.634.9%1918
92.9%
 ChessBrainVB 3.202803+17−1749.7%+1.133.6%1219
95.2%
 Booot 5.02784+15−1557.6%−56.831.3%1715
91.2%
 Toga II 1.3.12772+9−1046.3%+27.632.8%4308
93.9%
 Toga II 1.2.1a 32-bit2762+9−952.1%−18.433.4%4523
98.5%
 ChessBrainVB 3.022741+17−1749.0%+7.629.7%1156
58.7%
 Toga II 1.1a 32-bit2736+39−3776.7%−205.320.9%302
56.1%
5Glaurung 2.1 32-bit2732+34−3364.9%−105.927.6%319
92.9%
6Bison 9.11 32-bit2699+27−2747.3%+19.524.0%499
78.2%
 Fruit 2.12685+24−2448.3%+13.229.1%604
87.5%
 Booot 4.15.12668+13−1448.6%+13.628.2%2010
55.9%
7Vajolet 2.482667+17−1745.8%+30.127.1%1264
54.2%
 Booot 4.15.02665+12−1249.8%+3.632.6%2442
85.1%
 Glaurung 1.2.1 32-bit2657+10−1045.2%+34.429.6%4173
57.2%
8‑9Phalanx XXV2656+12−1350.5%−4.026.0%2354
49.7%
8‑9Scorpio 2.0 32-bit2656+12−1250.5%−2.535.2%2542
78.8%
 Scorpio 1.812648+14−1445.7%+22.426.2%2021
75.2%
 ChessBrainVB 2.052641+17−1752.0%−14.131.1%1153
47.2%
 Scorpio 1.92641+13−1337.3%+92.827.8%2357
51.3%
 Scorpio 1.912641+12−1243.2%+48.532.0%2381
59.3%
 Scorpio 1.822638+20−2052.2%−27.922.5%1024
64.0%
 Scorpio 1.842633+20−2027.0%+169.526.4%1026
66.1%
 Vajolet 2.032627+18−1849.2%−1.623.4%1305
61.0%
 Scorpio 1.82624+15−1440.6%+69.827.0%1803
61.5%
10DanaSah 7.32621+15−1548.5%+10.831.7%1461
71.6%
11Delfi 5.12615+12−1251.3%−9.229.8%2671
56.5%
 Glaurung 1.0.2 32-bit2613+29−2935.9%+100.128.8%427
51.8%
 Booot 4.14.02612+21−2149.7%+1.831.8%758
68.2%
12GreKo 2015-ML2603+31−3150.7%−5.930.5%338
59.9%
13Caligula 0.9g2598+20−2059.7%−68.826.1%857
48.6%
 DanaSah 7.02598+16−1651.3%−9.230.8%1294
72.7%
14K2 0.912592+14−1449.8%+1.331.2%1678
59.7%
 Phalanx XXIV2589+16−1652.0%−16.324.6%1445
58.7%
 K2 0.872587+17−1749.3%+4.128.4%1208
51.1%
15Nawito 18122586+18−1846.4%+24.433.2%1037
77.6%
 DanaSah 6.502577+14−1448.9%+7.929.6%1744
52.7%
 Delfi 5.02577+15−1539.5%+78.231.1%1562
89.1%
 Booot 4.13.12564+13−1349.0%+6.332.8%2049
66.3%
 K2 0.832560+16−1650.6%−5.226.4%1358
54.8%
 Caligula 0.9f2556+66−6654.7%−25.332.0%75
61.0%
 Tucano 1.042545+36−3660.7%−78.423.4%286
60.7%
16Betsabe II 1.842540+14−1449.6%+2.522.8%1930
74.4%
 DanaSah 4.882534+12−1248.9%+6.328.3%2487
61.4%
 DanaSah 4.662530+18−1848.7%+9.625.3%1177
70.9%
 Betsabe II 1.752524+17−1749.4%+4.221.5%1219
60.7%
17Crafty 20.14 32-bit2519+27−2736.5%+104.022.7%529
64.9%
 DanaSah 5.002510+35−3557.2%−55.822.8%290
54.7%
 GreKo 10.3.12508+18−1950.4%−2.227.6%1016
52.6%
 Caligula 0.82507+17−1758.7%−61.723.5%1257
54.2%
 DanaSah 4.242506+13−1347.1%+20.428.8%2208
53.8%
 Crafty 18.15 32-bit2504+34−3444.7%+37.228.7%303
50.4%
 K2 0.792504+20−2053.2%−25.425.8%925
73.6%
 Betsabe II 1.662495+18−1850.5%−2.722.4%1112
61.3%
 DanaSah 4.452492+20−2045.4%+32.026.7%930
47.7%
18Magnum 4.0 32-bit2492+15−1551.1%−16.124.9%1618
55.1%
19Pepito 1.59 32-bit2491+13−1350.8%−5.030.5%2197
60.2%
 Crafty 19.19 32-bit2487+28−2848.4%+13.030.7%436
62.8%
20CuckooChess 1.102481+17−1741.2%+65.025.6%1307
59.5%
21Gothmog 1.0b102479+17−1755.7%−44.521.2%1332
74.4%
 Betsabe II 1.472471+16−1654.3%−32.122.4%1574
100.0%
22Nemeton 1.82433+15−1549.2%+5.325.0%1538
50.7%
 Phalanx XXIII2433+18−1848.2%+13.022.0%1090
83.0%
 Caligula 0.7b2421+16−1648.3%+13.323.7%1416
52.0%
 Nemeton 1.512420+16−1653.4%−24.023.7%1483
58.9%
 GreKo 8.0 32-bit2418+17−1748.4%+9.529.7%1224
62.5%
23‑24Kiwi 0.6d 32-bit2414+16−1645.2%+33.424.6%1454
50.0%
23‑24Typhoon 1.00-3582414+17−1745.5%+33.423.6%1384
80.2%
25Arasan 9.52400+27−2750.8%−9.522.9%533
64.5%
 Nemeton 1.72394+17−1748.3%+11.325.6%1179
66.4%
 GreKo 7.2 32-bit2389+18−1849.5%+2.428.3%1110
62.6%
26‑27Amy 0.87b2385+9−948.1%+13.521.3%5398
52.4%
26‑27Diablo 0.5.12385+10−1048.8%+9.227.0%4210
49.2%
 K2 0.712385+18−1854.7%−37.221.6%1213
90.4%
 Phalanx XXIII beta2370+15−1548.5%+10.919.3%1660
52.2%
 Nemeton 1.62369+19−1943.6%+45.624.8%963
52.7%
28RomiChess P3kLD2368+22−2236.8%+97.524.1%806
64.3%
 Arasan 9.22362+23−2335.9%+106.222.5%778
79.2%
 Phalanx XXII Reborn JA2351+13−1355.3%−47.120.3%2536
66.7%
 Nemeton 1.412347+17−1748.2%+12.721.9%1305
77.0%
 GreKo 6.52338+18−1849.1%+5.926.2%1162
75.5%
29Thor's Hammer 2.28 32-bit2330+13−1356.3%−52.718.6%2412
52.9%
30Amundsen 0.802329+16−1655.1%−42.218.6%1522
94.0%
 Nemeton 1.32310+19−1946.1%+26.826.0%978
56.1%
 Nemeton 1.22308+18−1851.1%−8.925.1%1070
98.2%
 Betsabe II 1.092262+39−3781.7%−314.111.4%428
52.4%
31Natwarlal 0.142261+8−848.5%+10.421.1%7067
71.9%
 Nemeton 1.12254+25−2547.3%+18.921.3%600
99.6%
32EXchess 4.032214+16−1651.8%−21.025.5%1564
56.1%
 GreKo 5.12211+35−3458.1%−67.622.5%316
67.0%
33Beowulf 2.4a 32-bit2203+11−1148.8%+8.121.2%3569
67.6%
34RattateChess 1.0 Nosferatu2199+13−1347.4%+20.919.9%2520
76.5%
35Feuerstein 0.4.6.12192+14−1457.6%−65.720.0%2057
84.9%
 K2 0.572181+18−1852.8%−25.420.7%1159
98.5%
36Carballo 0.82146+25−2553.8%−46.420.0%626
85.7%
 K2 0.43f2130+18−1850.0%+0.919.3%1122
65.5%
 Jabba 1.0 32-bit2112+83−8543.0%+47.022.0%50
74.6%
37AdroitChess 0.42082+21−2149.8%+4.618.1%921
59.1%
38Parrot 07.07.222079+15−1550.0%+0.520.7%1788
98.1%
39King's Out 0.2.422055+18−1852.1%−23.116.5%1282
97.4%
40PLP 16615712032+17−1753.9%−34.912.8%1523
99.4%
 AdroitChess 0.31999+20−2056.1%−52.016.5%1049
50.8%
41Sjaak 3991999+19−1948.3%+12.719.0%1038
55.9%
42Wowl 1.31996+29−2946.5%+27.219.0%443
59.3%
43Small Potato 0.6.11993+10−1048.8%+5.820.8%4324
53.2%
44Gullydeckel 2.16pl11992+11−1151.1%−8.318.5%3392
61.2%
45Cupcake 1.01989+18−1944.2%+42.716.6%1172
54.1%
46Arabian Knight 1.551987+23−2353.1%−9.519.7%701
75.4%
47Faile 1.4.41979+9−944.5%+47.423.0%5701
60.1%
48Slibo 0.5.11975+25−2550.0%−12.719.9%592
54.2%
 K2 0.351973+34−3445.0%+43.820.5%317
53.5%
 Vice 1.11967+138−11680.4%−225.017.9%28
53.8%
49‑50Eia 0.31960+19−1950.5%+0.421.4%1103
51.6%
49‑50Sissa 2.01960+24−2446.0%+31.631.9%570
52.6%
 Monik 2.2.2 32-bit1958+57−6022.8%+288.912.7%189
50.7%
 Micro-Max 4.8 (DM-PII)1957+70−7047.9%+20.620.8%72
54.8%
51Micro-Max 4.81953+9−947.8%+18.822.2%5546
90.5%
52ChessKISS 1.31941+15−1552.6%−17.319.2%1816
93.8%
53BibiChess 0.51927+11−1149.8%−1.121.2%3261
63.9%
54Smash 1.0.31924+10−1048.3%+12.517.8%4501
76.0%
55SamChess1919+13−1354.8%−56.617.7%2377
60.6%
56Jabba 130320121915+27−2735.7%+111.816.7%552
64.3%
57Dabbaba 7.491909+14−1453.6%−45.817.2%2237
60.8%
58Robocide1905+24−2447.5%+14.714.2%777
66.3%
59Claudia 0.51897+28−2844.0%+47.116.5%492
80.2%
60Purple Haze 2.1.01884+13−1351.9%−13.814.2%2468
78.5%
61Zevra 1.6 r4971870+31−3145.5%+32.819.8%379
58.7%
 Arabian Knight 1.511866+26−2663.3%−154.314.2%719
50.5%
62NG-Play 8.41866+19−1951.8%−17.618.1%1106
61.0%
63Simontacchi 1.811862+14−1457.2%−58.612.2%2054
85.7%
 Wowl 1.3.81848+22−2328.5%+177.79.6%907
63.4%
64Barbarossa 0.1.01840+37−3662.1%−93.016.7%318
81.5%
65RataAeroespacial 0.2.11820+14−1453.7%−29.212.1%2039
54.6%
 Dabbaba 2.621819+16−1644.6%+41.813.8%1946
86.9%
66MorphyChess 1.0.51807+14−1451.3%−6.019.6%2023
83.0%
67ChessterfieldCL i5a1797+15−1446.8%+27.119.1%2134
67.8%
68Bremboce 0.6.21792+18−1856.2%−70.014.5%1290
58.9%
 Eia 0.21789+19−1945.5%+37.318.7%1028
68.2%
69CDrill 1800 build 41782+20−2044.8%+47.315.4%1039
81.0%
 Zevra 1.31 r3401767+26−2649.3%+5.521.5%543
75.9%
70Chenard 2009.09.191756+18−1928.0%+216.211.1%1614
51.0%
 NG-Play 8.31756+41−4167.9%−205.715.8%310
50.3%
 Zevra 1.21 r2901755+28−2837.6%+91.427.1%458
70.9%
71Ziggy 0.71746+20−2060.8%−114.914.5%1154
58.0%
72Zurichess 1501161742+31−3142.7%+68.428.8%410
72.4%
73Zzzzzz 3.511730+17−1748.9%+11.022.7%1245
64.7%
74Kitteneitor 0.22.11725+19−1950.9%−7.834.2%991
61.5%
75TSCP 1.811722+11−1048.3%+14.615.1%4214
63.0%
 Pulse 1.4.01714+42−4253.0%−25.620.6%218
61.1%
76RumbleMinze 1.0.331706+28−2840.8%+84.814.0%556
62.4%
77Testina 3c1699+33−3264.4%−140.224.6%403
58.2%
78Jester 0.841696+16−1650.4%−3.913.4%1554
90.7%
79Mizar 3.01683+10−1047.6%+22.115.8%4260
57.4%
 RumbleMinze 1.0.301681+22−2246.3%+28.318.9%774
58.2%
80BACE 0.451678+11−1149.4%+1.917.4%3350
52.9%
81PolarChess 1.31677+13−1352.6%−21.116.4%2590
99.1%
82Spartan 1.01645+24−2449.2%+9.319.1%660
75.3%
83ChessRikus 1.4661635+14−1451.7%−11.217.1%2146
58.5%
84MSCP 1.441633+12−1246.8%+24.218.6%3058
77.0%
 BACE 0.461624+20−2047.3%+22.522.8%974
52.9%
85Chess4j 2.01623+36−3729.2%+171.421.7%327
61.4%
86Philemon C1616+17−1754.9%−32.524.9%1284
53.7%
87AdaChess 2.01615+19−1947.0%+21.616.9%1119
70.6%
 Kitteneitor 0.12.11605+31−3150.6%−5.838.9%324
74.4%
88Darky 0.5d1592+23−2345.8%+25.918.0%801
49.4%
 Kitteneitor 0.18.1 32-bit1592+38−3853.5%−45.232.7%318
72.1%
89VanillaChess 2.6g1580+19−1956.4%−48.717.5%1091
86.5%
 MSCP 1.6h1559+30−3046.2%+22.610.9%532
82.9%
90Larsen VB 0.05.00011543+14−1443.1%+57.018.4%2239
95.8%
91Yawce 0.161518+25−2551.4%−16.614.1%658
50.8%
 ACE21517+105−10554.3%−48.214.9%47
53.2%
 Vajolet 0.4.11513+16−1644.4%+45.215.6%1629
71.0%
92Exacto 0.d1507+13−1341.5%+65.225.5%2275
52.6%
 Purple Haze 2.01507+14−1433.1%+153.520.8%2534
67.3%
93Alibaba 1.381500+23−2344.3%+45.616.9%804
66.0%
94Apep 1.011493+27−2746.9%+24.99.3%621
64.9%
95Butterfly 0.41487+15−1540.1%+72.039.7%1492
64.4%
96APILChess 1.05r1b1483+16−1642.6%+58.522.4%1561
92.6%
 Braincrack alpha1430+67−7419.7%+257.111.9%109
51.5%
 Alibaba 1.401429+21−2140.5%+74.020.5%901
53.2%
 Joanna 2002 1.061426+67−6845.9%+42.242.5%73
53.0%
97Suff 0.3.a1423+23−2340.4%+76.622.4%763
58.2%
 Abulafia 0.611418+38−3933.0%+162.014.9%356
58.7%
98Numpty DD1413+24−2429.9%+166.418.2%802
65.0%
99MiniMardi 1.31408+11−1236.2%+117.917.8%3572
99.8%
 Numpty Omega1380+16−1632.6%+140.719.9%1742
68.9%
100Skaki 1.231373+23−2351.7%+2.717.2%901
96.4%
101Joanna 2002 1.031345+21−2138.1%+108.226.3%1017
56.1%
 Numpty 0.7pr1343+25−2619.5%+259.215.4%781
61.6%
 uMax 1.6w1336+32−3260.7%−81.749.2%313
79.0%
102Fimbulwinter 5.001319+25−2637.6%+99.512.2%748
63.1%
 Project Invincible 2.101308+61−6429.7%+161.814.7%116
79.0%
103Chess 1.3.1 by David Cimbalista1280+25−2553.6%−21.024.1%623
56.4%
104QuTeChess 1.0.1t r31277+22−2248.7%+38.436.3%819
98.9%
105Tikov 0.6.31246+17−1745.1%+62.117.3%1647
86.5%
106Pierre 1.71232+19−1953.2%−28.612.0%1262
54.7%
107Toledo Nanochess Jan/11/20101230+15−1539.7%+101.931.6%1950
76.6%
108GrayMatter SVN16041215+37−3841.5%+106.218.6%376
67.7%
109Pulse 1.2.01205+29−2945.8%+33.627.9%445
80.2%
 BlitzKibitz 51185+35−3537.2%+72.141.4%273
54.4%
110Project Invincible 2.041182+26−2638.6%+157.927.3%674
92.8%
111Cassandre 0.241158+20−2057.5%−46.350.3%805
100.0%
112Ronja 0.6.01091+27−246.6%+26.832.6%644
77.2%
 AdaChess 1.01069+69−2511.3%+491.213.8%320
56.6%
113Talvmenni 0.11064+40−2957.7%−65.035.0%978
87.0%
114Minnow1045+61−4852.0%−11.635.2%474
74.3%
 DarkTemplar 0.11027+91−6618.8%+409.923.8%290
52.4%
115Xadreco 5.71025+77−6745.3%+23.823.0%683
64.0%
116Iota 1.0 32-bit1020+80−7359.1%−89.127.5%1154
77.3%
 Testina 2.21006+97−8658.0%−82.136.2%414
53.2%
117GIUChess 1.0 beta21005+95−8854.6%−29.335.1%772
89.6%
118Kace 0.82980+123−11349.9%+11.725.7%354
65.4%
119feeks 2018-01-31 LM972+126−12042.2%+68.926.9%1032
58.1%
 Hippocampe 0.4.2967+139−12569.9%−160.136.1%241
81.3%
120Zoe 0.1948+150−14540.4%+126.527.9%1305
99.0%
121Luzhin 0.1920+178−17340.8%+72.342.7%1624
64.2%
122Dreamer914+187−17964.8%−137.019.7%461
96.7%
123Hippocampe 0.4.1876+223−21762.2%−98.831.1%534
88.6%
 Chess4j 1.2844+256−24813.6%+525.515.3%472
99.9%
 Chess4j 0.1760+338−33229.7%+255.623.7%713
96.8%
124Belofte 0.9.0726+372−36732.4%+127.426.5%971
100.0%
 MicroChess 1976614+486−47850.0%−2.029.6%230
 

Results matrix

Open source 32-bit single-CPU engines (best versions only), top 12
#NameElo123456789101112
1Lc0 0.21.1 w41800 GPU3474            
2ChessBrainVB 3.702999            
3Toga II 3.02874   5 − 5
+3−3=4
−27
        
4Booot 5.1.02838  5 − 5
+3−3=4
+27
         
5Glaurung 2.1 32-bit2732            
6Bison 9.11 32-bit2699            
7Vajolet 2.482667            
8Phalanx XXV2656         1 − 1
+1−1=0
−4
  
9Scorpio 2.0 32-bit2656          18.5 − 13.5
+12−7=13
+11
 
10DanaSah 7.32621       1 − 1
+1−1=0
+4
    
11Delfi 5.12615        13.5 − 18.5
+7−12=13
−11
   
12GreKo 2015-ML2603            
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 32-bit single-CPU engines (best versions only), top 12
#NameElo123456789101112
1Lc0 0.21.1 w41800 GPU3474 100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
2ChessBrainVB 3.7029990.0 100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
3Toga II 3.028740.00.0 100.0100.0100.0100.0100.0100.0100.0100.0100.0
4Booot 5.1.028380.00.00.0 100.0100.0100.0100.0100.0100.0100.0100.0
5Glaurung 2.1 32-bit27320.00.00.00.0 92.9100.0100.0100.0100.0100.0100.0
6Bison 9.11 32-bit26990.00.00.00.07.1 97.799.899.8100.0100.0100.0
7Vajolet 2.4826670.00.00.00.00.02.3 84.384.1100.0100.0100.0
8Phalanx XXV26560.00.00.00.00.00.215.7 49.7100.0100.099.9
9Scorpio 2.0 32-bit26560.00.00.00.00.00.215.950.3 100.0100.099.9
10DanaSah 7.326210.00.00.00.00.00.00.00.00.0 71.684.7
11Delfi 5.126150.00.00.00.00.00.00.00.00.028.4 77.0
12GreKo 2015-ML26030.00.00.00.00.00.00.00.10.115.323.0 
LOS color legend:
0 10 20 30 40 50 60 70 80 90 100

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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
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Reference rating list:
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  Recalibrate current list to reference using all common engines


Created in 2005-2013 by CCRL team
Last games added on April 13, 2019