KCEC
(Kirr's Chess Engine Comparison)
A tournament of original free chess engines
June 16, 2013
Testing summary:
Total: 135,679 games
played by 202 programs
1398 CPU days (X2 4600+)

White wins: 55,227 (40.7%)
Black wins: 47,434 (35.0%)
Draws: 33,018 (24.3%)
White score: 52.9%

Engine Details

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Show each game results
Thinker 4.7a WB#33–34  (2634+17
−17		)Quote
Author: Lance Perkins (Canada) Released: 2004-10-01Link: Homepage
This engine is stable and runs without issues.
This is the only Thinker version we tested.
OpponentEloDiffResultsScoreLOSPerfPond
hit		Eval
diff
–   Frenzee 3.0 64-bit2711+19
−19		(+77)13 − 13
(+9−9=8)
50.0%
13.0 / 26
0.0%
+78
54.5%
1732
0.83
944
1 1 = 1 0 = 1 1 0 = 0 1 1 0 = 1 = = 0 0 = 0 0 0 1 =
–   Colossus 2007d2707+20
−20		(+73)11.5 − 13.5
(+8−10=7)
46.0%
11.5 / 25
0.0%
+49
56.5%
1850
0.62
1045
0 1 1 0 0 = 0 1 = 1 = = 1 0 1 0 = 0 = 1 1 0 0 = 0
–   Pharaon 3.5.12704+19
−19		(+70)6.5 − 13.5
(+4−11=5)
32.5%
6.5 / 20
0.0%
−54
62.9%
1481
0.61
932
0 0 0 1 1 0 1 = 0 = 0 1 0 = 0 0 = 0 = 0
–   List 5.122699+18
−18		(+65)9 − 21
(+4−16=10)
30.0%
9.0 / 30
0.0%
−69
64.8%
1985
0.58
1286
0 0 = = = 1 = 0 = 0 0 0 = 0 0 0 0 1 1 0 0 = 0 = 0 = = 0 1 0
–   SOS 5.12697+18
−18		(+63)7 − 19
(+2−14=10)
26.9%
7.0 / 26
0.0%
−90
55.2%
1602
1.02
884
0 = 0 0 = = 1 0 = 0 0 0 = 0 0 = 0 0 = = 1 0 0 = = 0
–   Colossus 2007c2694+19
−19		(+60)11 − 16
(+5−10=12)
40.7%
11.0 / 27
0.0%
0
56.6%
1558
0.55
882
1 = 0 1 = 1 = 0 = 0 0 1 0 = 0 = 0 0 = = = = = 0 1 0 =
–   Ruffian 1.0.52687+17
−17		(+53)9.5 − 18.5
(+3−12=13)
33.9%
9.5 / 28
0.0%
−44
61.8%
1553
0.73
959
= 0 = = = = 0 = = 0 = 1 1 0 = 0 0 0 = 0 0 = 0 1 0 = = 0
–   Petir 4.392682+18
−18		(+48)7 − 20
(+2−15=10)
25.9%
7.0 / 27
0.0%
−104
59.8%
1671
0.50
999
= 0 = 1 0 = 0 0 = = 1 0 = 0 0 0 0 0 0 0 0 0 = = = 0 =
–   Pseudo 0.7c2680+18
−18		(+46)13 − 12
(+8−7=10)
52.0%
13.0 / 25
0.0%
+59
58.8%
1558
0.57
916
= 1 1 = 0 = 1 = 0 1 0 = = 1 = = 0 1 1 = = 0 0 0 1
–   Aristarch 4.502671+18
−18		(+37)11 − 14
(+6−9=10)
44.0%
11.0 / 25
0.1%
0
58.2%
1175
0.84
684
1 0 = = = 0 0 = = = = 1 = 1 1 0 0 = 1 0 1 0 0 0 =
–   Petir 4.9999992670+19
−19		(+36)11.5 − 14.5
(+5−8=13)
44.2%
11.5 / 26
0.1%
+3
58.2%
1158
0.51
674
= 0 = = 0 1 = 1 0 0 = 0 = 0 = 1 1 = = = = 0 1 0 = =
–   Hamsters 0.62669+18
−18		(+35)13.5 − 10.5
(+10−7=7)
56.3%
13.5 / 24
0.1%
+79
56.6%
1881
0.49
1065
0 = 1 0 1 = 1 1 = = 0 = 0 1 1 0 = 1 1 = 0 1 0 1
–   The Baron 2.23 64-bit2669+19
−19		(+35)15.5 − 16.5
(+11−12=9)
48.4%
15.5 / 32
0.1%
+24
57.0%
2185
1.01
1245
1 0 0 1 0 1 = = = 1 0 0 0 1 1 = 0 0 0 = = 1 = 1 0 1 0 = 1 0 = 1
–   Booot 4.13.12668+18
−18		(+34)14 − 14
(+11−11=6)
50.0%
14.0 / 28
0.1%
+38
60.1%
2070
0.76
1245
= 1 1 0 1 1 = = 1 0 1 = 1 = 0 0 0 = 0 0 0 1 0 1 0 0 1 1
–   BugChess2 1.5.22661+18
−18		(+27)15 − 12
(+11−8=8)
55.6%
15.0 / 27
0.9%
+67
55.0%
2125
0.60
1169
0 = 0 1 1 0 1 0 1 0 = = 1 1 = 0 = 1 = 0 1 1 1 = 1 0 =
–   Jonny 2.832652+17
−17		(+18)18.5 − 9.5
(+14−5=9)
66.1%
18.5 / 28
5.9%
+124
52.7%
1736
0.64
915
1 1 0 = = 1 1 = 1 1 1 1 = 1 = 1 1 1 = = 0 1 0 0 1 = 0 =
–   Crafty 21.5 64-bit PS2652+17
−17		(+18)11.5 − 15.5
(+4−8=15)
42.6%
11.5 / 27
4.9%
−25
58.7%
1275
0.67
749
= = = = 0 1 0 0 1 = = = 1 0 = = = 0 0 0 = = = = 1 = 0
–   The Baron 1.8.12651+18
−18		(+17)14 − 11
(+10−7=8)
56.0%
14.0 / 25
6.8%
+58
53.5%
1463
0.83
782
0 1 0 = 0 1 0 1 = 1 = 0 = = 1 = 1 = 1 0 1 1 0 1 =
–   Anaconda 2.0.12644+17
−17		(+10)12.5 − 12.5
(+9−9=7)
50.0%
12.5 / 25
18.3%
+12
54.4%
1861
0.76
1012
0 1 0 0 1 = 1 = 0 = 1 = 0 0 1 1 = 0 = 0 = 1 0 1 1
–   Movei 00.8.4032643+22
−22		(+9)11.5 − 15.5
(+7−11=9)
42.6%
11.5 / 27
23.6%
−40
59.1%
1655
0.53
978
= = = 0 = 0 0 = 1 0 0 0 1 1 0 0 0 = 1 0 = = 1 0 = 1 1
–   Fritz 5.322643+17
−17		(+9)14 − 13
(+11−10=6)
51.9%
14.0 / 27
20.6%
+21
60.3%
2214
0.52
1335
1 = = 1 = = 0 0 0 1 1 1 0 0 0 = 1 1 1 0 1 0 = 0 1 1 0
–   Ktulu 4.22634+17
−17		(0)8.5 − 15.5
(+4−11=9)
35.4%
8.5 / 24
50.6%
−96
62.2%
1455
0.81
905
0 0 0 = = 1 0 0 0 1 = = = = 0 1 0 = 1 0 = 0 = 0
–   SmarThink 0.17a2633+16
−16		(−1)11.5 − 16.5
(+5−10=13)
41.1%
11.5 / 28
55.1%
−53
62.6%
1547
0.69
969
0 = = 0 0 1 0 0 = 0 1 = 1 = = 0 = 0 = = 1 = 1 = 0 = 0 =
–   Ufim 8.022628+18
−18		(−6)15.5 − 12.5
(+9−6=13)
55.4%
15.5 / 28
70.3%
+28
58.3%
1623
0.83
947
1 1 0 0 = = 1 = 0 1 1 = = = 1 0 = = = = 1 = 1 1 = = 0 0
–   Fritz 6 Light2627+19
−19		(−7)11.5 − 12.5
(+9−10=5)
47.9%
11.5 / 24
73.1%
−18
60.4%
1883
0.44
1137
1 = 0 1 0 0 1 0 1 1 1 = 1 1 0 = 0 = 0 0 0 = 0 1
–   Trace 1.37a2622+17
−17		(−12)12.5 − 12.5
(+9−9=7)
50.0%
12.5 / 25
84.8%
−10
54.4%
2200
0.68
1196
1 0 1 1 0 1 1 1 = 0 0 = = 1 = = 0 = 0 1 0 0 0 1 =
–   AnMon 5.602621+18
−18		(−13)21 − 11
(+14−4=14)
65.6%
21.0 / 32
87.6%
+84
55.4%
1551
0.59
860
0 = 1 = 1 1 = 1 = 1 0 1 = 1 = = 1 1 1 1 = 0 0 = = 1 = = = 1 = 1
–   E.T. Chess 18.11.052620+21
−21		(−14)17.5 − 7.5
(+13−3=9)
70.0%
17.5 / 25
86.6%
+118
60.1%
1627
0.57
978
1 1 1 1 = 1 = 1 1 1 1 1 0 = = 1 0 = = = 1 = 1 = 0
–   Little Goliath 3.12 Evolution (TB Off)2614+17
−17		(−20)12 − 13
(+7−8=10)
48.0%
12.0 / 25
96.0%
−34
51.8%
1583
0.94
820
= = 1 0 0 0 0 0 = = 1 0 1 1 = 1 1 0 0 = = = = 1 =
–   Yace 0.99.872609+17
−17		(−25)13.5 − 13.5
(+10−10=7)
50.0%
13.5 / 27
98.7%
−27
57.2%
2205
0.51
1262
= 0 0 1 = 1 1 0 1 1 1 = 0 0 1 = 1 1 = 0 0 0 0 = 0 = 1
–   Little Goliath 3.12 Evolution (TB On)2607+19
−19		(−27)14 − 14
(+9−9=10)
50.0%
14.0 / 28
98.7%
−27
53.6%
2215
0.93
1188
= 0 1 0 = = 1 1 = 1 0 = = = 0 1 0 = 0 0 = = 1 0 0 1 1 1
–   Hamsters 0.52595+21
−21		(−39)12 − 15
(+8−11=8)
44.4%
12.0 / 27
99.9%
−76
57.3%
1799
0.61
1031
0 0 = 0 1 1 = 0 = = 1 0 0 0 1 0 = = 1 0 1 = = 0 1 0 1
–   Pepito 1.59 32-bit2595+19
−19		(−39)15.5 − 13.5
(+11−9=9)
53.4%
15.5 / 29
99.9%
−16
57.4%
2016
0.60
1157
0 0 1 1 = 1 0 0 = = 1 1 1 0 0 = 0 0 = = = 1 0 = = 1 1 1 1
–   Bruja 1.9 64-bit JA No-int-book2584+18
−18		(−50)16.5 − 9.5
(+12−5=9)
63.5%
16.5 / 26
100.0%
+37
55.3%
2264
0.68
1251
1 = = 1 1 1 0 1 1 0 0 0 = = 1 = = 1 = 0 1 1 1 = = 1
–   Green Light Chess 3.002582+17
−17		(−52)15 − 11
(+11−7=8)
57.7%
15.0 / 26
100.0%
+2
62.4%
2102
0.61
1311
1 = 1 1 1 1 1 = 1 = = 0 = = 0 1 0 0 = 1 1 = 1 0 0 0
–   Tao 5.62574+17
−17		(−60)14.5 − 9.5
(+9−4=11)
60.4%
14.5 / 24
100.0%
+5
56.1%
1352
0.56
758
= 0 = 1 1 = 1 = 1 0 1 = = 1 0 1 = = = = 1 = 0 1
–   Cerebro 3.03d2572+19
−19		(−62)21 − 11
(+16−6=10)
65.6%
21.0 / 32
100.0%
+41
53.8%
2112
0.75
1136
= 1 = 1 0 0 0 = 1 1 1 = 1 0 = 1 = 1 1 0 1 1 = = 1 1 = 0 = 1 1 1
–   Twisted Logic 20080404x2568+18
−18		(−66)17 − 9
(+14−6=6)
65.4%
17.0 / 26
100.0%
+42
54.4%
1994
0.74
1085
1 1 1 1 = = 0 = 1 1 0 0 = 1 1 0 1 1 1 = 0 0 1 1 1 =
–   Arasan 10.0 64-bit2564+17
−17		(−70)12 − 14
(+9−11=6)
46.2%
12.0 / 26
100.0%
−94
58.1%
2262
0.59
1315
1 = 1 = 0 = 0 = 1 0 0 0 0 1 0 1 0 0 0 1 1 0 1 = 1 =
–   Abrok 5.02561+17
−17		(−73)14 − 8
(+10−4=8)
63.6%
14.0 / 22
100.0%
+16
54.1%
1363
0.56
738
0 1 = 1 1 = = 1 = 0 1 1 = = 1 1 = 0 1 = 1 0
–   Amyan 1.5972552+17
−17		(−82)14 − 11
(+10−7=8)
56.0%
14.0 / 25
100.0%
−42
59.0%
1696
0.60
1000
0 0 1 = 0 = 1 = = = 1 1 = 1 0 1 0 1 = 1 = 0 1 1 0
–   Matacz 1.3 HT74 5-men-egbb2551+18
−18		(−83)15 − 9
(+11−5=8)
62.5%
15.0 / 24
100.0%
+2
61.4%
1477
0.75
907
0 1 1 = 0 = 1 = 1 = = 1 1 1 0 1 1 1 1 0 = 0 = =
–   SpiderChess 0706032546+17
−17		(−88)13.5 − 12.5
(+7−6=13)
51.9%
13.5 / 26
100.0%
−79
57.7%
1336
0.63
771
0 = 1 = 1 0 = = 0 0 = = = 1 0 1 = 1 = = 1 0 1 = = =
–   Quark 2.352536+16
−16		(−98)18 − 8
(+14−4=8)
69.2%
18.0 / 26
100.0%
+31
57.6%
1950
0.63
1124
0 1 = 0 0 = 1 1 = = 1 = 1 1 1 1 = 1 = 0 1 1 = 1 1 1
–   Gaia 3.5 64-bit2536+17
−17		(−98)19.5 − 12.5
(+16−9=7)
60.9%
19.5 / 32
100.0%
−18
52.0%
2912
0.78
1515
0 1 1 0 = 1 0 1 0 0 1 0 1 1 = 1 0 = = 1 0 = 0 1 1 1 1 1 1 1 = =
–   King of Kings 2.562536+18
−18		(−98)11.5 − 10.5
(+7−6=9)
52.3%
11.5 / 22
100.0%
−85
56.5%
1392
0.94
786
= 1 1 = = 0 1 = 1 0 = = 1 = 1 = 0 0 0 0 = 1
–   LambChop 10.992531+17
−17		(−103)16.5 − 9.5
(+13−6=7)
63.5%
16.5 / 26
100.0%
−9
58.8%
2245
0.59
1321
1 1 0 0 1 1 = 1 = 1 0 1 0 0 1 = 1 = = 1 0 1 = 1 = 1
–   Dragon 4.62524+16
−16		(−110)19.5 − 8.5
(+15−4=9)
69.6%
19.5 / 28
100.0%
+21
61.6%
1945
0.47
1198
0 1 1 1 0 1 = 1 1 1 = = 1 0 1 1 = 1 1 0 = = = 1 = 1 1 =
–   Nejmet 3.072521+16
−16		(−113)18.5 − 5.5
(+14−1=9)
77.1%
18.5 / 24
100.0%
+62
57.6%
1554
0.46
895
= = 1 1 1 1 = 1 1 1 1 = 1 = 1 = 1 0 1 1 1 = = =
–   Snitch 1.6.2 32-bit2521+15
−15		(−113)18.5 − 4.5
(+17−3=3)
80.4%
18.5 / 23
100.0%
+134
56.2%
2124
0.58
1194
1 1 1 1 1 0 0 1 1 1 1 1 1 1 = = 0 1 1 1 1 = 1
–   Comet B682478+14
−14		(−156)17.5 − 7.5
(+14−4=7)
70.0%
17.5 / 25
100.0%
−18
57.4%
1558
0.88
894
= 1 1 1 1 1 = = 1 = 1 1 0 0 1 1 1 = 0 1 = 0 = 1 1
–   Sjeng 12.132475+14
−14		(−159)15.5 − 10.5
(+12−7=7)
59.6%
15.5 / 26
100.0%
−92
56.1%
1873
0.79
1050
1 1 = 0 0 1 1 1 0 = 1 1 = 1 = 1 0 = = 1 0 1 1 0 0 =
1366 games in total: 493 wins, 414 losses, 459 draws (33.6%), score: 52.9%
Average opponent: −20.5 (2613.5), average distance to opponent: 52.7

Performance

This figure shows how this engine performs depending on how strong is the opponent. Regression:

Perf = C + 0.065 [±0.261] * Opp

Where 'Opp' is the opponent's rating. 95% confidence intervals are in the brackets.

Rating changes by day

Rating changes with played games

Created in 2005-2012 by Kirill Kryukov
Updated on June 16, 2013