CCRL 40/4
Downloads and Statistics
August 17, 2019
Testing summary:
Total: 2'085'472 games
played by 2'422 programs
28065 CPU days (X2 4600+)

White wins: 809'852 (38.8%)
Black wins: 654'916 (31.4%)
Draws: 620'704 (29.8%)
White score: 53.7%

Open source 32-bit 1-2-CPU engines

Comparing 248 engines!
126 best versions of selected engines played 13802 games with each other

CCRL 40/4 Rating List — Open source 32-bit 1-2-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 August 17, 2019 with Bayeselo based on 2'085'472 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 JH.T6.532 GTX10503486+17−1759.2%−58.552.4%1100 
84.2%
 Lc0 0.21.1 w41800 GTX10503474+17−1755.7%−37.451.2%1000
97.5%
 Lc0 0.20.2 w32930 GTX10503452+14−1459.2%−60.548.4%1600
96.6%
 Lc0 0.20.1 w36089 GTX980Ti3425+25−2461.9%−73.855.7%490
100.0%
 Lc0 0.20.1 w36089 OpenCL GTX980Ti3318+26−2645.2%+30.254.4%439
100.0%
2ChessBrainVB 3.723048+19−1952.3%−19.331.5%927
100.0%
 ChessBrainVB 3.702999+17−1751.3%−10.834.9%1116
49.9%
 Stockfish 2.0.1 32-bit2999+41−3974.7%−177.530.4%237
72.3%
 ChessBrainVB 3.682984+29−2952.1%−15.133.8%397
66.4%
 ChessBrainVB 3.662977+16−1650.9%−7.136.5%1319
100.0%
 ChessBrainVB 3.602906+32−3253.2%−20.734.2%310
52.1%
 ChessBrainVB 3.502905+15−1549.7%+3.834.2%1510
99.6%
3Toga II 3.02875+17−1754.0%−27.434.2%1204
100.0%
4Booot 5.1.02838+11−1148.2%+15.032.0%3102
78.1%
 ChessBrainVB 3.312828+24−2453.7%−27.929.8%574
63.4%
 Toga II 1.4.1SE2823+9−1050.1%+1.034.0%4172
66.3%
 Toga II 1.4 beta5c2820+14−1448.9%+5.834.9%1918
92.5%
 ChessBrainVB 3.202804+17−1749.7%+0.633.6%1219
95.7%
 Booot 5.02784+15−1557.6%−57.031.3%1715
91.3%
 Toga II 1.3.12772+10−946.3%+27.332.8%4308
94.1%
 Toga II 1.2.1a 32-bit2762+9−952.1%−18.833.4%4523
98.5%
 ChessBrainVB 3.022740+17−1749.0%+8.429.7%1156
59.0%
 Toga II 1.1a 32-bit2735+39−3776.7%−204.420.9%302
56.2%
5Glaurung 2.1 32-bit2731+34−3364.9%−105.427.6%319
92.9%
6Bison 9.11 32-bit2699+27−2747.3%+18.924.0%499
77.1%
 Fruit 2.12685+24−2448.3%+13.529.1%604
88.4%
 Booot 4.15.12668+14−1448.6%+13.228.2%2010
53.9%
7Vajolet 2.482667+17−1745.8%+30.327.1%1264
56.2%
 Booot 4.15.02665+12−1249.8%+3.332.6%2442
63.9%
8K2 0.952660+28−2857.6%−54.624.1%448
56.8%
 Glaurung 1.2.1 32-bit2657+10−1045.2%+33.929.6%4173
57.4%
9Scorpio 2.0 32-bit2655+12−1250.5%−1.935.2%2542
61.5%
10Phalanx XXV2653+12−1250.4%−3.126.1%2428
69.6%
 Scorpio 1.812648+14−1445.7%+21.926.2%2021
76.9%
 Scorpio 1.92641+13−1337.3%+92.327.8%2357
51.4%
 Scorpio 1.912641+12−1343.2%+48.032.0%2381
53.1%
 ChessBrainVB 2.052640+17−1752.0%−13.831.1%1153
55.7%
 Scorpio 1.822638+20−2052.2%−28.322.5%1024
63.9%
 Scorpio 1.842633+20−2027.0%+169.226.4%1026
65.0%
 Vajolet 2.032627+18−1849.2%−1.423.4%1305
62.7%
 Scorpio 1.82623+14−1540.6%+70.227.0%1803
74.1%
11DanaSah 7.32617+15−1548.2%+12.531.8%1574
57.9%
12Delfi 5.12615+12−1251.3%−9.629.8%2671
56.2%
 Glaurung 1.0.2 32-bit2612+29−2935.9%+100.628.8%427
52.1%
 Booot 4.14.02611+21−2149.7%+2.331.8%758
65.2%
13Caligula 0.9g2606+18−1959.4%−66.927.3%1033
49.4%
 DanaSah 7.92606+73−7250.8%−4.635.0%60
53.8%
14GreKo 2015-ML2602+31−3150.7%−5.030.5%338
59.7%
 DanaSah 7.02598+16−1651.3%−9.730.8%1294
78.7%
 K2 0.912589+14−1449.7%+2.831.0%1721
52.1%
 Phalanx XXIV2589+16−1652.0%−16.724.6%1445
52.4%
15Nawito 18122588+17−1747.3%+18.232.6%1203
56.1%
 K2 0.872586+17−1749.3%+4.828.4%1208
60.3%
 Nawito 19062583+18−1849.5%+3.930.0%1022
68.6%
 DanaSah 6.502577+14−1448.9%+7.629.6%1744
53.4%
 Delfi 5.02576+15−1539.5%+78.631.1%1562
89.0%
 Booot 4.13.12564+13−1349.0%+5.832.8%2049
66.3%
 K2 0.832559+16−1650.6%−4.626.4%1358
54.4%
 Caligula 0.9f2556+66−6654.7%−25.432.0%75
61.1%
 Tucano 1.042545+36−3660.7%−78.623.4%286
51.0%
 Betsabe II 1.962543+105−10550.0%+0.018.8%32
50.7%
16Betsabe II 1.842542+12−1249.1%+6.323.0%2634
85.6%
 DanaSah 4.882533+12−1248.9%+7.028.3%2487
61.4%
 DanaSah 4.662530+18−1848.7%+9.425.3%1177
71.4%
 Betsabe II 1.752523+17−1749.4%+4.821.5%1219
60.3%
17Crafty 20.14 32-bit2519+27−2736.5%+103.522.7%529
64.9%
 DanaSah 5.002510+36−3557.2%−56.122.8%290
54.5%
 GreKo 10.3.12508+19−1950.4%−2.427.6%1016
53.0%
 Caligula 0.82507+17−1758.7%−62.223.5%1257
54.0%
 DanaSah 4.242506+13−1347.1%+20.128.8%2208
53.9%
 Crafty 18.15 32-bit2504+34−3444.7%+36.928.7%303
50.4%
 K2 0.792503+20−2053.2%−24.825.8%925
73.4%
 Betsabe II 1.662495+18−1850.5%−3.022.4%1112
59.0%
18Pepito 1.59 32-bit2493+12−1250.8%−5.430.5%2261
54.1%
19Magnum 4.0 32-bit2492+15−1550.7%−13.425.2%1743
51.4%
 DanaSah 4.452491+20−2045.4%+32.526.7%930
60.5%
 Crafty 19.19 32-bit2487+28−2848.4%+12.530.7%436
61.3%
20Gothmog 1.0b102482+17−1655.8%−45.521.6%1393
52.0%
21CuckooChess 1.102481+17−1741.2%+64.625.6%1307
81.6%
 Betsabe II 1.472471+16−1654.3%−32.422.4%1574
99.0%
22Nemeton 1.812435+26−2647.7%+15.326.6%523
51.1%
 BBChess 1.3b2433+101−10635.0%+95.036.7%30
50.7%
 Nemeton 1.82432+15−1548.9%+8.224.9%1568
50.6%
 Phalanx XXIII2432+18−1848.2%+13.722.0%1090
82.6%
 Caligula 0.7b2421+16−1648.3%+13.123.7%1416
52.1%
 Nemeton 1.512420+16−1653.4%−24.123.7%1483
59.2%
 GreKo 8.0 32-bit2417+17−1748.4%+10.329.7%1224
61.9%
23Typhoon 1.00-3582414+16−1645.5%+33.423.6%1384
50.5%
24Kiwi 0.6d 32-bit2413+16−1645.2%+34.124.6%1454
80.8%
25Arasan 9.52400+27−2750.8%−10.122.9%533
63.2%
 Nemeton 1.72394+17−1748.3%+11.425.6%1179
67.5%
 GreKo 7.2 32-bit2388+18−1849.5%+3.128.3%1110
62.6%
26‑27Amy 0.87b2385+9−948.0%+13.921.4%5504
52.7%
26‑27Diablo 0.5.12385+9−1048.6%+10.027.0%4316
49.2%
 K2 0.712385+18−1854.7%−37.521.6%1213
90.3%
 Phalanx XXIII beta2370+15−1548.5%+10.719.3%1660
51.1%
 Nemeton 1.62369+19−1943.6%+45.724.8%963
54.0%
28RomiChess P3kLD2368+22−2236.8%+97.124.1%806
64.5%
 Arasan 9.22362+23−2335.9%+105.822.5%778
79.2%
 Phalanx XXII Reborn JA2351+12−1255.3%−47.620.3%2536
65.6%
 Nemeton 1.412347+17−1748.2%+12.621.9%1305
77.6%
 GreKo 6.52337+17−1849.1%+6.626.2%1162
75.8%
29Thor's Hammer 2.28 32-bit2330+13−1356.3%−53.318.6%2412
53.3%
30Amundsen 0.802329+17−1755.1%−42.718.6%1522
93.3%
 Nemeton 1.32310+19−1946.1%+26.926.0%978
57.2%
 Nemeton 1.22307+18−1851.1%−8.325.1%1070
98.3%
 Betsabe II 1.092262+39−3781.7%−314.211.4%428
52.3%
31Natwarlal 0.142261+8−848.5%+9.921.1%7130
72.7%
 Nemeton 1.12253+24−2547.3%+19.421.3%600
99.6%
32EXchess 4.032214+16−1651.8%−21.525.5%1564
56.3%
 GreKo 5.12211+35−3458.1%−68.422.5%316
66.8%
33Beowulf 2.4a 32-bit2202+11−1148.8%+8.621.2%3569
68.6%
34RattateChess 1.0 Nosferatu2198+12−1247.4%+21.119.9%2520
75.2%
35Feuerstein 0.4.6.12192+14−1457.6%−66.120.0%2057
85.4%
 K2 0.572180+18−1852.8%−25.120.7%1159
98.5%
36Carballo 0.82146+25−2553.8%−46.920.0%626
85.8%
 K2 0.43f2129+18−1850.0%+1.319.3%1122
65.2%
 Jabba 1.0 32-bit2112+83−8543.0%+47.022.0%50
71.3%
37AdroitChess 0.42087+20−2050.6%−2.918.0%993
74.6%
38Parrot 07.07.222078+15−1450.1%+0.320.8%1820
97.8%
39King's Out 0.2.422055+18−1852.1%−23.316.5%1282
97.4%
40PLP 16615712032+17−1753.9%−35.112.8%1523
99.4%
 AdroitChess 0.31999+20−2056.1%−52.116.5%1049
51.1%
41Sjaak 3991998+19−1948.3%+13.419.0%1038
57.2%
42Wowl 1.31995+29−2946.5%+27.319.0%443
59.2%
43‑44Gullydeckel 2.16pl11992+11−1151.1%−9.018.5%3424
46.1%
43‑44Small Potato 0.6.11992+10−1048.8%+6.520.8%4324
64.0%
45Cupcake 1.01989+18−1844.2%+42.316.6%1172
54.0%
46Arabian Knight 1.551987+23−2353.1%−9.619.7%701
78.6%
47Faile 1.4.41977+9−944.3%+48.723.1%5837
54.2%
48Slibo 0.5.11976+25−2550.0%−13.119.9%592
55.2%
 K2 0.351973+34−3445.0%+43.820.5%317
61.5%
49Sissa 2.01966+23−2345.8%+33.031.5%642
50.1%
 Vice 1.11966+138−11680.4%−225.017.9%28
53.4%
50Eia 0.31961+19−1850.5%−0.321.4%1103
52.2%
 Micro-Max 4.8 (DM-PII)1959+70−7047.9%+19.720.8%72
50.9%
 Monik 2.2.2 32-bit1958+57−6022.8%+288.612.7%189
56.1%
51Micro-Max 4.81953+9−947.9%+18.322.1%5578
91.6%
52ChessKISS 1.31941+15−1552.6%−17.319.2%1816
94.0%
53BibiChess 0.51927+11−1149.8%−1.421.2%3261
63.9%
54Smash 1.0.31924+10−1048.3%+12.217.8%4501
75.7%
55SamChess1919+13−1354.8%−56.917.7%2377
52.7%
 Fairy-Max 5.0b31918+19−1951.5%−12.519.8%999
58.4%
56Jabba 130320121914+27−2735.7%+112.416.7%552
64.6%
57Dabbaba 7.491908+13−1353.3%−41.816.8%2393
59.5%
58Robocide1905+24−2447.5%+14.514.2%777
65.6%
59Claudia 0.51897+28−2844.0%+47.316.5%492
62.9%
 Fairy-Max 5.0b1891+22−2251.0%−7.917.8%800
72.3%
60Purple Haze 2.1.01884+13−1352.0%−14.214.2%2580
79.1%
61Zevra 1.6 r4971870+31−3145.5%+32.819.8%379
58.9%
 Arabian Knight 1.511865+26−2563.3%−153.714.2%719
50.7%
62NG-Play 8.41865+19−1951.8%−16.918.1%1106
60.9%
63Simontacchi 1.811862+15−1457.2%−58.912.2%2054
88.3%
 Wowl 1.3.81846+21−2229.5%+170.110.1%987
60.4%
64Raven 0.401842+25−2550.0%+0.715.4%591
54.0%
65Barbarossa 0.1.01839+37−3662.1%−92.716.7%318
82.5%
 Dabbaba 2.621819+16−1644.6%+41.613.8%1946
50.1%
66RataAeroespacial 0.2.11819+14−1452.5%−20.412.0%2191
92.3%
67MorphyChess 1.0.51805+14−1451.1%−5.219.7%2056
69.2%
68ChessterfieldCL i5a1799+14−1546.8%+27.019.1%2134
74.6%
69Bremboce 0.6.21792+18−1856.2%−70.314.5%1290
59.7%
 Eia 0.21788+20−2045.5%+37.718.7%1028
55.9%
70CDrill 1800 build 41786+19−1945.6%+40.315.3%1104
87.8%
 Zevra 1.31 r3401767+26−2649.3%+5.221.5%543
75.6%
71Chenard 2009.09.191756+18−1928.0%+216.011.1%1614
51.7%
 NG-Play 8.31755+41−4167.9%−205.815.8%310
49.9%
 Zevra 1.21 r2901755+28−2837.6%+91.027.1%458
70.6%
72Ziggy 0.71745+20−2060.8%−114.414.5%1154
58.1%
73Zurichess 1501161741+31−3142.7%+69.028.8%410
71.4%
74Zzzzzz 3.511730+17−1748.9%+11.222.7%1245
67.8%
75‑76Kitteneitor 0.22.11724+19−1950.9%−7.734.2%991
50.9%
75‑76TSCP 1.811724+10−1048.5%+12.315.0%4421
67.0%
 Pulse 1.4.01714+42−4253.0%−26.220.6%218
60.6%
77RumbleMinze 1.0.331706+28−2840.8%+84.714.0%556
64.7%
78Testina 3c1698+33−3264.4%−140.624.6%403
54.6%
79Celestial 1.01696+18−1849.9%+1.319.0%1153
52.8%
80Jester 0.841695+16−1650.4%−3.513.4%1554
90.5%
81Mizar 3.01682+10−1047.6%+22.715.8%4260
55.9%
 RumbleMinze 1.0.301681+22−2246.3%+28.318.9%774
59.1%
82BACE 0.451678+11−1149.4%+1.617.4%3350
52.6%
83PolarChess 1.31677+13−1352.6%−21.416.4%2590
99.2%
84Spartan 1.01644+24−2449.2%+9.219.1%660
76.0%
85ChessRikus 1.4661634+13−1351.6%−10.717.6%2244
53.4%
86MSCP 1.441633+12−1246.8%+23.918.6%3058
75.8%
 BACE 0.461625+20−2047.3%+21.822.8%974
54.0%
87Chess4j 2.01622+36−3729.2%+171.721.7%327
63.3%
88AdaChess 2.01615+19−1947.0%+21.416.9%1119
51.3%
89Philemon C1614+16−1654.7%−31.524.7%1446
70.4%
 Kitteneitor 0.12.11605+31−3150.6%−6.038.9%324
70.2%
 Kitteneitor 0.18.1 32-bit1591+38−3853.5%−45.332.7%318
53.0%
90Darky 0.5d1590+22−2346.6%+19.417.4%841
80.4%
91VanillaChess 2.6g1577+19−1955.6%−42.617.7%1126
84.2%
 MSCP 1.6h1559+30−3046.2%+21.710.9%532
81.7%
92Larsen VB 0.05.00011543+14−1443.1%+57.018.4%2239
68.5%
 ACE21517+105−10554.3%−49.014.9%47
50.1%
93Yawce 0.161517+25−2551.4%−16.814.1%658
61.3%
 Vajolet 0.4.11513+16−1644.4%+45.315.6%1629
71.6%
94Exacto 0.d1507+13−1341.5%+65.125.5%2275
52.3%
 Purple Haze 2.01507+13−1433.1%+153.520.8%2534
67.6%
95Alibaba 1.381500+23−2344.3%+45.316.9%804
63.7%
96Apep 1.011494+26−2646.6%+27.29.1%692
68.0%
97Butterfly 0.41487+15−1540.1%+72.139.7%1492
64.5%
98APILChess 1.05r1b1483+16−1642.6%+58.722.4%1561
91.3%
 Raven 0.301465+20−2051.9%−14.811.9%1023
98.6%
 Alibaba 1.401434+20−2041.3%+67.520.3%941
54.2%
 Braincrack alpha1430+67−7419.7%+257.011.9%109
54.0%
 Joanna 2002 1.061425+67−6845.9%+42.842.5%73
52.7%
99Suff 0.3.a1422+23−2340.4%+77.022.4%763
60.1%
 Abulafia 0.611416+38−3933.0%+162.714.9%356
56.8%
100Numpty DD1413+24−2429.9%+165.818.2%802
60.0%
101MiniMardi 1.31409+11−1136.6%+114.417.7%3654
99.9%
 Numpty Omega1380+16−1632.6%+140.719.9%1742
72.0%
102Skaki 1.231372+23−2351.7%+2.317.2%901
95.8%
103Joanna 2002 1.031345+21−2138.1%+107.726.3%1017
55.0%
 Numpty 0.7pr1343+25−2619.5%+259.315.4%781
64.0%
 uMax 1.6w1335+32−3260.7%−82.049.2%313
78.9%
104Fimbulwinter 5.001318+26−2637.6%+99.112.2%748
59.7%
 Project Invincible 2.101310+61−6429.7%+161.514.7%116
79.0%
105Chess 1.3.1 by David Cimbalista1282+25−2553.4%−19.424.2%654
64.2%
106QuTeChess 1.0.1t r31276+22−2248.7%+38.336.3%819
98.8%
107Tikov 0.6.31245+17−1745.1%+62.117.3%1647
86.5%
108Pierre 1.71231+19−1953.2%−28.412.0%1262
60.3%
109Toledo Nanochess Jan/11/20101228+15−1539.4%+103.131.4%1982
73.8%
110GrayMatter SVN16041215+38−3841.5%+105.318.6%376
69.1%
111Pulse 1.2.01203+29−2945.8%+33.527.9%445
79.6%
 BlitzKibitz 51184+35−3537.2%+71.941.4%273
54.1%
112Project Invincible 2.041181+26−2638.6%+157.927.3%674
92.7%
113Cassandre 0.241157+20−2057.5%−46.150.3%805
100.0%
114Ronja 0.6.01090+32−1246.6%+26.532.6%644
77.6%
 AdaChess 1.01067+74−3511.3%+492.213.8%320
55.4%
115Talvmenni 0.11063+48−3857.7%−65.335.0%978
88.4%
116Minnow1043+71−5952.0%−11.635.2%474
73.7%
 DarkTemplar 0.11025+99−7618.8%+411.023.8%290
50.1%
117Xadreco 5.71025+85−7645.3%+24.123.0%683
68.9%
118Iota 1.0 32-bit1018+90−8459.1%−89.427.5%1154
77.5%
 Testina 2.21004+108−9758.0%−81.636.2%414
56.6%
119GIUChess 1.0 beta21001+108−10154.6%−30.335.1%772
82.7%
120Kace 0.82983+129−11949.9%+10.825.7%354
71.3%
121feeks 2018-01-31 LM972+135−13042.2%+68.326.9%1032
79.3%
 Hippocampe 0.4.2953+162−14969.9%−164.836.1%241
65.5%
122Zoe 0.1944+163−15840.4%+126.427.9%1305
94.4%
123Luzhin 0.1926+181−17656.7%−43.538.2%2598
86.4%
124Dreamer907+202−19464.8%−140.319.7%461
96.9%
125Hippocampe 0.4.1869+239−23362.2%−102.231.1%534
98.0%
 Chess4j 1.2834+273−26852.7%+78.834.0%1486
100.0%
 Chess4j 0.1751+356−35029.7%+258.123.7%713
100.0%
126Belofte 0.9.0693+414−40951.9%−24.124.0%3101
100.0%
 MicroChess 1976610+499−49150.0%+2.629.6%230
 

Results matrix

Open source 32-bit 1-2-CPU engines (best versions only), top 12
#NameElo123456789101112
1Lc0 0.21.1 JH.T6.532 GTX10503486            
2ChessBrainVB 3.723048            
3Toga II 3.02875   5 − 5
+3−3=4
−28
        
4Booot 5.1.02838  5 − 5
+3−3=4
+28
         
5Glaurung 2.1 32-bit2731            
6Bison 9.11 32-bit2699            
7Vajolet 2.482667            
8K2 0.952660            
9Scorpio 2.0 32-bit2655           18.5 − 13.5
+12−7=13
+12
10Phalanx XXV2653          1 − 1
+1−1=0
−5
 
11DanaSah 7.32617         1 − 1
+1−1=0
+5
  
12Delfi 5.12615        13.5 − 18.5
+7−12=13
−12
   
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 1-2-CPU engines (best versions only), top 12
#NameElo123456789101112
1Lc0 0.21.1 JH.T6.532 GTX10503486 100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
2ChessBrainVB 3.7230480.0 100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
3Toga II 3.028750.00.0 100.0100.0100.0100.0100.0100.0100.0100.0100.0
4Booot 5.1.028380.00.00.0 100.0100.0100.0100.0100.0100.0100.0100.0
5Glaurung 2.1 32-bit27310.00.00.00.0 92.9100.099.9100.0100.0100.0100.0
6Bison 9.11 32-bit26990.00.00.00.07.1 97.597.599.899.9100.0100.0
7Vajolet 2.4826670.00.00.00.00.02.5 66.785.590.6100.0100.0
8K2 0.9526600.00.00.00.00.12.533.3 60.266.599.699.8
9Scorpio 2.0 32-bit26550.00.00.00.00.00.214.539.7 61.5100.0100.0
10Phalanx XXV26530.00.00.00.00.00.19.433.538.5 100.0100.0
11DanaSah 7.326170.00.00.00.00.00.00.00.40.00.0 57.9
12Delfi 5.126150.00.00.00.00.00.00.00.20.00.042.1 
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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Reference rating list:
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Created in 2005-2013 by CCRL team
Last games added on August 17, 2019