CCRL 40/40
Downloads and Statistics
March 23, 2019
Testing summary:
Total: 1'009'555 games
played by 2'389 programs
138832 CPU days (X2 4600+)

White wins: 350'040 (34.7%)
Black wins: 260'174 (25.8%)
Draws: 399'341 (39.6%)
White score: 54.5%

Open source 4-CPU engines

Comparing 162 engines!
34 best versions of selected engines played 2782 games with each other

CCRL 40/40 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 40 minutes on Athlon 64 X2 4600+ (2.4 GHz), about 15 minutes on a modern Intel CPU.
Computed on March 23, 2019 with Bayeselo based on 1'009'555 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+
 SugaR 1.6.1 64-bit 4CPU3473+70−6772.2%−136.455.6%63 
50.0%
 Xiphos 0.5 64-bit 4CPU3473+217−21750.0%+0.0100.0%4
54.1%
1Stockfish 10 64-bit 4CPU3462+23−2377.3%−188.543.3%684
69.1%
 Stockfish 270918 64-bit 4CPU3453+28−2777.9%−189.443.3%457
85.6%
 SugaR XPrO 1.5.3 64-bit 4CPU3433+24−2471.8%−144.451.3%544
55.2%
 Stockfish 9 64-bit 4CPU3431+15−1572.3%−153.550.5%1423
95.5%
 SugaR XPrO 1.4 64-bit 4CPU3410+20−2072.3%−150.251.8%840
55.5%
 asmFish 051117 64-bit 4CPU3408+20−1969.8%−130.255.7%819
75.1%
 SugaR XPrO 1.2 64-bit 4CPU3398+21−2070.4%−135.752.5%754
63.2%
 ShashChess Pro 1.0 64-bit 4CPU3392+33−3365.6%−94.461.7%256
77.3%
 Stockfish 8 64-bit 4CPU3377+13−1365.1%−96.162.1%1647
64.8%
 SugaR XPrO 1.3 64-bit 4CPU3372+23−2266.0%−102.657.4%598
99.9%
 Stockfish 7 64-bit 4CPU3325+15−1567.0%−105.557.3%1304
98.1%
2Ethereal 11.00 64-bit 4CPU3297+20−2048.7%+8.563.9%714
58.9%
 Laser 1.7 64-bit 4CPU3292+42−4159.5%−54.559.5%158
52.5%
 Stockfish 6 64-bit 4CPU3291+14−1465.3%−94.957.3%1542
51.4%
 Ethereal 11.25 64-bit 4CPU3289+55−5642.0%+49.259.1%88
61.5%
 Andscacs 0.95 64-bit 4CPU3280+41−4149.7%+0.460.6%160
59.1%
 Ethereal 10.55 64-bit 4CPU3274+25−2449.8%−1.957.4%488
64.7%
 Stockfish 5 64-bit 4CPU3268+15−1567.9%−110.853.7%1324
66.4%
3Andscacs 0.94 64-bit 4CPU3263+19−1848.3%+9.955.1%876
54.5%
4Booot 6.3.1 64-bit 4CPU3261+19−1944.8%+32.455.8%831
78.8%
5Xiphos 0.4 64-bit 4CPU3251+18−1943.8%+39.061.1%830
81.7%
 Andscacs 0.921 64-bit 4CPU3239+16−1650.7%−6.647.5%1225
52.2%
 Andscacs 0.93 64-bit 4CPU3238+18−1842.9%+45.654.8%938
63.1%
 Stockfish DD 64-bit 4CPU3234+17−1763.5%−81.155.5%992
92.1%
 Booot 6.2 64-bit 4CPU3217+15−1442.2%+51.059.2%1427
51.4%
6Laser 1.6 64-bit 4CPU3217+17−1742.4%+50.756.1%1034
81.5%
 Stockfish 4 64-bit 4CPU3205+17−1660.9%−64.158.9%1054
88.9%
 Ethereal 10.00 64-bit 4CPU3189+20−1953.4%−23.650.8%788
59.7%
 ChessBrainVB 3.72 4CPU3183+39−3944.4%+35.750.0%196
56.8%
7Gull 3 64-bit 4CPU3179+9−1041.7%+53.554.5%3651
55.3%
 Gull 2.8b 64-bit 4CPU3178+19−1949.1%+3.751.8%797
50.4%
 Xiphos 0.3 64-bit 4CPU3178+21−2149.2%+3.354.2%660
64.7%
8Arasan 21.2 64-bit 4CPU3170+35−3551.6%−8.863.8%218
55.5%
 Arasan 21.1 64-bit 4CPU3167+27−2751.2%−8.059.5%383
50.6%
 Booot 6.1 64-bit 4CPU3166+20−2041.6%+52.460.6%708
51.5%
 Stockfish 3 64-bit 4CPU3166+21−2156.0%−35.457.8%663
76.5%
9Nemorino 5.00 64-bit 4CPU3155+20−2049.9%−1.451.9%756
72.9%
 Stockfish 2.2.2 64-bit 4CPU3147+16−1659.2%−56.853.4%1141
64.6%
 Gull 2.3 64-bit 4CPU3142+17−1747.4%+14.959.3%982
48.9%
 Laser 1.5 64-bit 4CPU3142+20−2049.4%+8.554.5%723
51.0%
 Stockfish 2.3.1 64-bit 4CPU3142+19−1955.4%−33.152.5%846
50.7%
10Texel 1.07 64-bit 4CPU3142+14−1449.9%+2.749.0%1568
65.0%
11Protector 1.9.0 64-bit 4CPU3138+15−1546.3%+25.454.1%1313
64.9%
 Sting SF 6 64-bit 4CPU3132+28−2850.8%−6.961.0%354
48.4%
12Vajolet2 2.6.1 64-bit 4CPU3132+22−2249.6%+3.161.0%567
52.5%
 Sting SF 4.8.4 64-bit 4CPU3131+29−2953.3%−20.662.4%330
50.4%
 Texel 1.06 64-bit 4CPU3131+20−2046.1%+25.453.6%739
59.6%
 Stockfish 2.0.1 64-bit 4CPU3127+24−2456.4%−40.648.6%514
56.5%
 Protector 1.8.0 64-bit 4CPU3124+28−2750.4%−1.854.7%386
52.0%
13ChessBrainVB 3.68 4CPU3123+26−2649.2%+4.051.6%428
49.5%
 Gull 3.1 64-bit 4CPU3123+30−3045.4%+33.545.1%359
58.5%
 Arasan 20.4.1 64-bit 4CPU3119+25−2651.7%−10.850.2%452
53.9%
 Sting SF 5 64-bit 4CPU3117+25−2548.1%+12.754.0%465
61.2%
14IvanHoe 9.46h 64-bit 4CPU3113+14−1453.2%−19.559.5%1542
49.4%
 Stockfish 2.1.1 64-bit 4CPU3113+27−2754.7%−28.948.3%406
54.4%
 Stockfish 1.9.1 64-bit 4CPU3111+24−2362.1%−80.646.2%580
56.6%
15Senpai 2.0 64-bit 4CPU3108+20−2050.9%−7.248.9%750
50.0%
 Sting SF 3 64-bit 4CPU3108+21−2147.7%+12.258.5%644
52.2%
 Sting SF 2 64-bit 4CPU3107+27−2748.8%+8.858.1%375
52.1%
 Stockfish 1.8 64-bit 4CPU3107+19−1962.2%−82.249.3%850
53.0%
 ChessBrainVB 3.66 4CPU3105+28−2854.2%−27.048.7%378
54.1%
 Stockfish 1.7.1 64-bit 4CPU3103+19−1960.7%−69.452.8%860
54.4%
 Xiphos 0.2.2 64-bit 4CPU3102+26−2647.3%+13.453.6%414
54.8%
 RubiChess 1.3 64-bit 4CPU3098+55−5461.1%−71.638.9%108
50.6%
 Gull 2.2 64-bit 4CPU3097+25−2544.5%+31.554.8%469
52.4%
 Vajolet2 2.5 64-bit 4CPU3096+24−2451.5%−9.454.0%493
52.7%
 Sting SF 9 64-bit 4CPU3095+34−3450.6%−4.145.5%266
50.8%
 Nemorino 4.00 64-bit 4CPU3094+22−2250.0%+1.752.9%624
50.3%
 Sting SF 4 64-bit 4CPU3094+23−2341.9%+49.448.9%562
63.1%
 Arasan 20.3 64-bit 4CPU3087+32−3252.5%−19.747.4%302
50.3%
 Laser 1.4 64-bit 4CPU3087+19−1949.6%+0.545.7%843
59.6%
 Texel 1.05 64-bit 4CPU3084+17−1747.3%+18.651.4%1016
77.0%
 Protector 1.7.0 64-bit 4CPU3074+19−1944.1%+37.250.6%834
59.0%
 Nemorino 3.0 64-bit 4CPU3071+27−2747.9%+12.546.1%427
50.5%
 Protector 1.6.0 64-bit 4CPU3070+21−2243.2%+44.750.2%656
54.3%
16Rodent III 0.238 64-bit 4CPU3069+20−2047.2%+14.550.0%742
62.0%
17Defenchess (SCTR) 1.1f 64-bit 4CPU3064+19−1951.8%−12.045.0%854
68.3%
 Texel 1.04 64-bit 4CPU3057+21−2143.1%+43.547.8%722
56.0%
 Protector 1.5.0 64-bit 4CPU3055+18−1842.5%+48.047.4%952
52.9%
 Demolito 2018-10-29 64-bit 4CPU3054+43−4353.8%−27.453.2%158
56.6%
 Ethereal 9.00 64-bit 4CPU3049+23−2346.8%+19.245.1%570
50.5%
 Rodent III 0.276 64-bit 4CPU3049+58−5845.6%+30.061.3%80
52.2%
 Pirarucu 2.9.5 64-bit 4CPU3046+83−8635.9%+82.756.4%39
51.1%
 Tucano 7.06 64-bit 4CPU3043+205−21355.6%−119.644.4%9
50.6%
 Vajolet2 2.2 64-bit 4CPU3041+27−2747.0%+15.448.7%423
49.8%
 Vajolet2 2.4 64-bit 4CPU3041+19−1947.2%+18.545.7%878
54.0%
 Stockfish 1.6.3 64-bit 4CPU3040+22−2258.2%−54.544.8%631
53.2%
 Arasan 19.2 64-bit 4CPU3038+31−3151.7%−11.055.0%289
49.7%
 Gull R375 64-bit 4CPU3038+22−2243.4%+37.657.4%605
70.6%
 Vajolet2 2.3 64-bit 4CPU3027+31−3243.7%+36.054.7%287
54.9%
 Arasan 20.0 64-bit 4CPU3025+34−3449.0%+7.657.1%240
53.1%
18Bobcat 8.0 64-bit 4CPU3023+23−2347.3%+16.953.4%566
49.7%
 Senpai 1.0 64-bit 4CPU3023+16−1646.2%+21.153.5%1095
60.1%
 Arasan 19.0.1 64-bit 4CPU3018+34−3354.2%−32.143.1%276
56.9%
19Pirarucu 2.7.4 64-bit 4CPU3015+23−2355.5%−38.846.0%567
54.2%
20chess22k 1.10 64-bit 4CPU3013+22−2246.7%+16.243.7%680
52.9%
21Crafty 25.2 64-bit 4CPU3012+16−1648.4%+9.543.6%1187
51.7%
 Nemorino 2.00 64-bit 4CPU3011+30−3047.0%+16.459.6%302
52.2%
 Texel 1.03 64-bit 4CPU3010+31−3150.3%−1.447.0%313
50.8%
22Cheng 4.39 64-bit 4CPU3009+16−1650.0%+0.649.2%1218
50.1%
 Laser 1.3 64-bit 4CPU3009+29−3047.2%+15.955.8%321
70.1%
 Vajolet2 2.1 64-bit 4CPU2999+25−2550.9%−3.948.5%462
55.0%
 Rodent III 0.210 64-bit 4CPU2996+28−2845.1%+33.242.5%402
65.2%
23Scorpio 2.8 64-bit 4CPU2988+29−2951.5%−11.945.9%364
62.0%
 Protector 1.4.0 64-bit 4CPU2982+19−1942.5%+49.642.9%912
55.6%
 Bobcat 7.6 64-bit 4CPU2980+32−3250.2%−1.341.7%300
49.1%
 Cheng4 0.38 64-bit 4CPU2980+24−2446.0%+23.642.4%531
63.9%
 Arasan 18.3 64-bit 4CPU2973+30−3046.6%+20.646.8%327
53.0%
24EXchess 7.97b 64-bit 4CPU2972+18−1847.3%+18.945.7%985
52.2%
 Arasan 18.2 64-bit 4CPU2971+28−2851.9%−15.050.3%388
52.2%
 Stockfish 1.5.1 64-bit 4CPU2970+25−2553.7%−23.647.7%495
62.0%
 Protector 1.3.6 64-bit 4CPU2963+33−3345.7%+24.544.7%291
51.5%
25Demolito 2017-08-26 64-bit 4CPU2962+21−2140.2%+63.840.8%748
60.0%
26Toga II 4.0 64-bit 4CPU2959+19−1940.8%+60.240.0%872
49.6%
 Winter 0.5 64-bit 4CPU2959+55−5551.9%−12.837.7%106
52.2%
 EXchess 7.88b 64-bit 4CPU2957+29−2945.4%+29.848.6%356
65.3%
 Crafty 25.0 64-bit 4CPU2950+25−2548.1%+12.447.9%468
53.5%
 Stockfish 1.4 64-bit 4CPU2948+17−1754.2%−28.742.2%1131
58.2%
 Scorpio 2.7.9 64-bit 4CPU2945+22−2246.7%+20.840.5%659
61.9%
 EXchess 7.51b 64-bit 4CPU2939+33−3350.7%−2.645.7%276
57.8%
 Arasan 17.5 64-bit 4CPU2935+27−2748.4%+9.745.1%406
54.1%
 Bobcat 7.1 64-bit 4CPU2932+33−3348.0%+12.847.1%278
50.5%
 EXchess 7.71b 64-bit 4CPU2932+28−2853.3%−22.843.2%403
54.0%
 Ethereal 8.62 64-bit 4CPU2930+22−2244.2%+35.849.7%600
58.5%
 Arasan 18.0 64-bit 4CPU2926+29−2947.2%+15.641.5%378
65.5%
 Toga II 3.0 4CPU2919+22−2345.6%+26.849.0%592
54.8%
27Marvin 3.2.0 64-bit 4CPU2917+22−2254.3%−30.642.3%648
61.8%
 Crafty 23.8 64-bit 4CPU2910+33−3447.6%+16.747.2%267
62.9%
 Toga II 1.4.1SE 4CPU2904+13−1348.5%+10.941.6%2041
66.8%
 Cheng4 0.36c 64-bit 4CPU2897+30−3048.8%+6.046.6%326
52.0%
 Glaurung 2.2 64-bit 4CPU2896+16−1647.0%+19.040.7%1259
72.7%
28Octochess r5506 64-bit 4CPU2887+21−2144.6%+35.546.9%685
55.8%
29MinkoChess 1.3 64-bit 4CPU2885+21−2146.0%+24.743.7%725
52.2%
 Toga II 1.4 beta5c 4CPU2884+18−1851.7%−11.545.8%996
63.7%
 Crafty 24.1 64-bit 4CPU2878+31−3243.5%+41.339.1%322
56.8%
 Scorpio 2.7.6 64-bit 4CPU2874+26−2647.4%+17.044.0%445
62.9%
 Glaurung 2.1 64-bit 4CPU2869+19−1942.8%+50.741.3%946
55.4%
 Bobcat 6.4b 64-bit 4CPU2867+27−2748.3%+11.046.5%415
52.0%
 EXchess 7.18b 64-bit 4CPU2865+35−3546.7%+20.537.9%256
51.5%
 Crafty 23.4 64-bit 4CPU2864+37−3747.2%+17.235.2%236
60.3%
 Arasan 16.3 64-bit 4CPU2858+34−3449.1%+4.040.2%276
51.8%
 Scorpio 2.7.5 64-bit 4CPU2856+35−3644.1%+34.350.9%230
51.6%
 Scorpio 2.7.7 64-bit 4CPU2855+32−3242.9%+45.241.3%310
55.9%
30Monolith 1.0 64-bit 4CPU2852+25−2546.5%+21.543.6%514
76.5%
 Crafty 23.3 64-bit 4CPU2837+31−3241.5%+55.338.2%325
68.1%
 Glaurung 2.0.1 64-bit 4CPU2828+17−1743.8%+39.043.5%1100
63.8%
 Octochess r5190 64-bit 4CPU2823+24−2445.9%+23.844.5%555
86.2%
 Laser 1.0 64-bit 4CPU2798+39−4037.2%+83.939.6%207
59.4%
 Crafty 23.1 64-bit 4CPU2791+36−3743.8%+42.936.9%241
89.1%
 Glaurung 1.2.1 64-bit 4CPU2765+18−1940.2%+64.138.1%967
67.8%
 Crafty 23.0 64-bit 4CPU2759+18−1839.0%+77.534.1%1042
65.5%
 Topple 0.4.0 64-bit 4CPU2738+95−10329.2%+141.430.6%36
55.0%
 Scorpio 2.0 32-bit 4CPU2731+24−2433.4%+115.436.7%607
76.2%
 Scorpio 2.1 64-bit 4CPU2719+27−2734.4%+108.931.6%490
96.7%
31RedQueen 1.1.98 64-bit 4CPU2682+27−2839.5%+80.527.8%474
87.2%
 RedQueen 1.1.97 64-bit 4CPU2661+22−2245.7%+27.133.3%726
100.0%
32Fridolin 2.00 64-bit 4CPU2588+34−3441.9%+57.431.3%297
95.9%
33Jazz 840 64-bit 4CPU2552+20−2058.6%−70.525.3%968
82.8%
34Nemeton 1.8 4CPU2535+28−2852.3%−16.128.2%464
93.2%
 Invictus r228 64-bit 4CPU2338+242−29628.6%+167.30.0%7
 

Results matrix

Open source 4-CPU engines (best versions only), top 12
#NameElo123456789101112
1Stockfish 10 64-bit 4CPU3462 33.5 − 14.5
+19−0=29
−51
35 − 9
+26−0=18
−7
33.5 − 10.5
+24−1=19
−35
38.5 − 5.5
+33−0=11
+77
36.5 − 7.5
+29−0=15
−16
      
2Ethereal 11.00 64-bit 4CPU329714.5 − 33.5
+0−19=29
+51
 19.5 − 14.5
+11−6=17
+7
16 − 16
+1−1=30
−36
17.5 − 14.5
+4−1=27
−22
20.5 − 11.5
+10−1=21
−1
  27.5 − 8.5
+19−0=17
+21
   
3Andscacs 0.94 64-bit 4CPU32639 − 35
+0−26=18
+7
14.5 − 19.5
+6−11=17
−7
 20 − 17
+7−4=26
+21
19 − 15
+6−2=26
+18
22 − 12
+12−2=20
+38
  26.5 − 10.5
+17−1=19
+24
1.5 − 0.5
+1−0=1
+21
 1 − 1
+0−0=2
−131
4Booot 6.3.1 64-bit 4CPU326110.5 − 33.5
+1−24=19
+35
16 − 16
+1−1=30
+36
17 − 20
+4−7=26
−21
 16 − 16
+6−6=20
−12
18.5 − 13.5
+8−3=21
+1
  26 − 10
+17−1=18
+27
   
5Xiphos 0.4 64-bit 4CPU32515.5 − 38.5
+0−33=11
−77
14.5 − 17.5
+1−4=27
+22
15 − 19
+2−6=26
−18
16 − 16
+6−6=20
+12
 18.5 − 14.5
+8−4=21
−2
 7.5 − 2.5
+5−0=5
+72
21.5 − 14.5
+10−3=23
−42
   
6Laser 1.6 64-bit 4CPU32177.5 − 36.5
+0−29=15
+16
11.5 − 20.5
+1−10=21
+1
12 − 22
+2−12=20
−38
13.5 − 18.5
+3−8=21
−1
14.5 − 18.5
+4−8=21
+2
 19 − 13
+8−2=22
+13
1 − 1
+0−0=2
−47
18 − 18
+8−8=20
−63
  9.5 − 6.5
+6−3=7
−23
7Gull 3 64-bit 4CPU3179     13 − 19
+2−8=22
−13
    11.5 − 9.5
+3−1=17
−15
9.5 − 6.5
+5−2=9
+6
8Arasan 21.2 64-bit 4CPU3170    2.5 − 7.5
+0−5=5
−72
1 − 1
+0−0=2
+47
  4.5 − 4.5
+1−1=7
−15
3 − 3
+0−0=6
−28
 5 − 4
+1−0=8
−17
9Nemorino 5.00 64-bit 4CPU3155 8.5 − 27.5
+0−19=17
−21
10.5 − 26.5
+1−17=19
−24
10 − 26
+1−17=18
−27
14.5 − 21.5
+3−10=23
+42
18 − 18
+8−8=20
+63
 4.5 − 4.5
+1−1=7
+15
 22 − 20
+12−10=20
+1
 23.5 − 21.5
+11−9=25
−8
10Texel 1.07 64-bit 4CPU3142  0.5 − 1.5
+0−1=1
−21
    3 − 3
+0−0=6
+28
20 − 22
+10−12=20
−1
 28 − 33
+12−17=32
−26
3.5 − 2.5
+2−1=3
+41
11Protector 1.9.0 64-bit 4CPU3138      9.5 − 11.5
+1−3=17
+15
  33 − 28
+17−12=32
+26
  
12Vajolet2 2.6.1 64-bit 4CPU3132  1 − 1
+0−0=2
+131
  6.5 − 9.5
+3−6=7
+23
6.5 − 9.5
+2−5=9
−6
4 − 5
+0−1=8
+17
21.5 − 23.5
+9−11=25
+8
2.5 − 3.5
+1−2=3
−41
  
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 10 64-bit 4CPU3462 100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
2Ethereal 11.00 64-bit 4CPU32970.0 99.599.7100.0100.0100.0100.0100.0100.0100.0100.0
3Andscacs 0.94 64-bit 4CPU32630.00.5 54.582.2100.0100.0100.0100.0100.0100.0100.0
4Booot 6.3.1 64-bit 4CPU32610.00.345.5 78.8100.0100.0100.0100.0100.0100.0100.0
5Xiphos 0.4 64-bit 4CPU32510.00.017.821.2 99.7100.0100.0100.0100.0100.0100.0
6Laser 1.6 64-bit 4CPU32170.00.00.00.00.3 100.099.0100.0100.0100.0100.0
7Gull 3 64-bit 4CPU31790.00.00.00.00.00.0 69.498.4100.0100.0100.0
8Arasan 21.2 64-bit 4CPU31700.00.00.00.00.01.030.6 76.692.294.396.2
9Nemorino 5.00 64-bit 4CPU31550.00.00.00.00.00.01.623.4 85.390.393.8
10Texel 1.07 64-bit 4CPU31420.00.00.00.00.00.00.07.814.7 65.076.1
11Protector 1.9.0 64-bit 4CPU31380.00.00.00.00.00.00.05.79.735.0 65.2
12Vajolet2 2.6.1 64-bit 4CPU31320.00.00.00.00.00.00.03.86.223.934.8 
LOS color legend:
0 10 20 30 40 50 60 70 80 90 100

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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 March 23, 2019