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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Grizzly 1.40.1b WB#167  (1837+20
−20		)Quote
Author: Michael Lawatsch (Germany) Released: 2002-10-24Link: Homepage
Issues with this engine: Grizzly 1.40.1b does not count the opening moves when a GUI opening book is used. This leads to incorrect time allocation and time trouble. (Same bug in other engines discussed at Winboard forum). Grizzly 1.40.1b frequently loses on time.
This is the only Grizzly version we tested.
OpponentEloDiffResultsScoreLOSPerfPond
hit		Eval
diff
–   Marvin 1.3.02054+16
−16		(+217)4.5 − 27.5
(+3−26=3)
14.1%
4.5 / 32
0.0%
−104
50.7%
2082
0.71
1055
0 0 0 0 0 0 0 0 0 0 1 0 = = 0 1 0 0 = 0 0 0 0 0 0 0 0 1 0 0 0 0
–   Matant 5.042053+17
−17		(+216)6 − 26
(+5−25=2)
18.8%
6.0 / 32
0.0%
−64
50.3%
1752
0.84
882
0 0 0 0 0 = 0 0 0 1 0 0 1 0 0 0 = 0 0 0 0 0 0 1 0 0 0 1 0 0 0 1
–   SSEChessII 2.05 DC2049+17
−17		(+212)7.5 − 24.5
(+6−23=3)
23.4%
7.5 / 32
0.0%
−9
49.3%
2002
0.93
987
0 = 1 0 0 0 0 0 0 0 0 0 0 0 1 0 = 0 0 0 1 0 0 = 0 0 0 1 1 0 1 0
–   Faile 1.4.42042+15
−15		(+205)5 − 27
(+2−24=6)
15.6%
5.0 / 32
0.0%
−68
51.6%
1799
0.55
928
0 = 0 0 0 0 0 0 0 0 = 0 1 0 0 0 0 0 1 0 0 0 0 = = 0 = 0 0 0 0 =
–   Smash 1.0.32036+17
−17		(+199)4.5 − 27.5
(+4−27=1)
14.1%
4.5 / 32
0.0%
−149
53.0%
2215
0.66
1173
0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 = 0 0 0 0 0 0 0 0 1 1 0
–   Micro-Max 4.8 PIV DM2028+17
−17		(+191)12 − 20
(+11−19=2)
37.5%
12.0 / 32
0.0%
+88
72.1%
2118
0.94
1528
0 = 0 0 1 0 1 1 1 0 0 0 1 1 1 1 0 0 0 0 1 0 0 0 1 0 1 = 0 0 0 0
–   Sharper 0.172022+16
−16		(+185)6.5 − 25.5
(+6−25=1)
20.3%
6.5 / 32
0.0%
−87
51.6%
2135
0.58
1101
0 0 0 0 0 1 0 = 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 0 0 1 1
–   Mustang 4.972021+17
−17		(+184)12.5 − 19.5
(+9−16=7)
39.1%
12.5 / 32
0.0%
+101
52.6%
1754
0.65
923
0 = = 0 = 0 1 0 0 1 = 0 1 0 0 0 0 1 0 1 0 0 = 1 0 1 = 1 = 0 1 0
–   Rival UCI 1.182021+17
−17		(+184)6 − 26
(+4−24=4)
18.8%
6.0 / 32
0.0%
−76
47.4%
1862
0.82
882
0 0 0 0 0 = 0 0 0 0 0 0 1 0 0 0 0 0 0 1 = 0 0 = = 0 0 0 1 0 0 1
–   BibiChess 0.52007+16
−16		(+170)6.5 − 25.5
(+5−24=3)
20.3%
6.5 / 32
0.0%
−83
  
0 = 0 0 1 0 0 0 0 = = 0 0 0 0 0 1 0 0 1 0 0 0 1 0 0 0 0 0 1 0 0
–   IACH 0.56z1995+18
−18		(+158)9.5 − 22.5
(+7−20=5)
29.7%
9.5 / 32
0.0%
0
59.1%
1945
1.28
1149
0 0 0 0 0 0 0 0 = 1 = 0 1 0 0 0 1 0 0 1 0 = 0 0 1 = = 0 0 0 1 1
–   Heracles 0.6.161993+19
−19		(+156)7.5 − 24.5
(+7−24=1)
23.4%
7.5 / 32
0.0%
−82
49.0%
2141
0.74
1049
0 0 1 1 0 1 1 0 0 0 0 0 0 0 0 0 = 0 0 1 1 0 0 0 0 0 0 0 0 0 1 0
–   Clueless 1.41990+18
−18		(+153)7.5 − 24.5
(+6−23=3)
23.4%
7.5 / 32
0.0%
−70
49.0%
2115
1.02
1037
0 0 = 0 0 0 0 1 0 0 = 0 1 0 0 0 1 0 1 0 0 0 1 1 0 0 0 = 0 0 0 0
–   Warrior 1.0.31987+17
−17		(+150)9 − 23
(+7−21=4)
28.1%
9.0 / 32
0.0%
−24
51.7%
1834
0.53
948
0 0 1 1 0 0 0 0 0 0 1 = 0 0 1 1 = 0 1 0 0 0 0 = 0 0 0 0 0 1 0 =
–   Morphy 3.221974+17
−17		(+137)6.5 − 25.5
(+1−20=11)
20.3%
6.5 / 32
0.0%
−63
51.1%
1461
2.82
747
0 = 0 = 0 = 0 0 0 0 = 0 0 0 0 0 0 0 = 0 0 0 = = 1 = = 0 = 0 0 =
–   Eagle 0.7.51973+20
−20		(+136)9 − 23
(+9−23=0)
28.1%
9.0 / 32
0.0%
−63
47.0%
2265
0.95
1064
0 0 0 0 0 1 0 0 0 0 0 0 0 1 1 1 0 0 0 1 1 0 0 1 0 0 0 0 1 0 1 0
–   SnailChess 4.0131973+19
−19		(+136)10 − 22
(+9−21=2)
31.3%
10.0 / 32
0.0%
−22
75.5%
1504
2.13
1135
1 0 1 = 0 0 0 0 0 0 0 1 1 1 0 1 0 0 = 0 0 0 0 0 0 0 0 1 0 0 1 1
–   Celes 0.77c1921+20
−20		(+84)9.5 − 22.5
(+8−21=3)
29.7%
9.5 / 32
0.0%
−83
46.2%
1887
1.19
872
0 0 0 1 1 0 1 0 = 0 1 0 0 0 = 0 0 1 0 0 0 1 0 0 1 0 0 0 0 0 1 =
–   Simontacchi 1.811915+20
−20		(+78)10.5 − 21.5
(+10−21=1)
32.8%
10.5 / 32
0.0%
−71
53.1%
2166
0.53
1150
0 1 0 1 0 0 0 0 1 0 1 1 0 1 0 0 0 0 0 = 1 0 0 0 0 1 0 1 0 0 1 0
–   Ranita 2.41907+20
−20		(+70)11.5 − 20.5
(+7−16=9)
35.9%
11.5 / 32
0.0%
−27
51.9%
1547
0.64
803
1 1 = 0 0 = = 0 0 0 1 0 = = 0 1 0 0 1 = = 0 = 0 0 1 0 0 0 0 1 =
–   Cecir 3.51885+19
−19		(+48)12 − 20
(+12−20=0)
37.5%
12.0 / 32
0.0%
−64
48.4%
2207
0.73
1069
1 0 0 1 1 0 1 0 0 0 0 0 1 0 0 1 0 0 1 0 0 0 0 0 1 1 1 0 1 0 1 0
–   Enigma 1.1.41879+21
−21		(+42)14 − 18
(+12−16=4)
43.8%
14.0 / 32
0.1%
−9
42.7%
1958
1.12
836
0 1 1 0 1 1 0 0 1 0 1 0 0 = 1 = 1 = 0 0 0 1 0 0 0 = 1 1 0 1 0 0
–   Soldat 0.25b1873+17
−17		(+36)18.5 − 13.5
(+14−9=9)
57.8%
18.5 / 32
0.1%
+90
50.9%
1425
0.56
725
1 1 = = = 1 1 1 1 = = = 0 1 0 1 1 1 0 = 1 = 0 0 1 0 0 0 = 1 1 0
–   Robin 0.9831834+20
−20		(−3)18 − 14
(+16−12=4)
56.3%
18.0 / 32
58.0%
+46
48.6%
1999
0.64
972
0 0 1 1 1 1 = = 1 1 0 0 1 0 1 1 0 0 1 0 1 1 1 = = 0 0 0 1 1 0 1
–   Elf 1.3.01820+18
−18		(−17)18.5 − 13.5
(+15−10=7)
57.8%
18.5 / 32
91.2%
+39
55.4%
1799
0.60
996
= 1 1 0 = 0 0 1 1 0 0 1 1 1 1 1 0 = 0 1 0 = = 1 0 1 = 1 0 1 1 =
–   Laurifer 1.01815+18
−18		(−22)22 − 10
(+18−6=8)
68.8%
22.0 / 32
96.4%
+111
52.9%
1754
0.82
928
= = 1 0 1 0 1 1 1 = = 1 1 1 1 1 1 = 1 0 = 0 1 1 0 1 1 0 1 1 = =
–   Kanguruh 1.931806+22
−22		(−31)17 − 15
(+15−13=4)
53.1%
17.0 / 32
98.9%
−7
48.7%
1863
0.85
907
1 0 1 0 1 = 1 0 0 0 1 = 1 1 1 1 0 1 0 0 0 1 = = 0 0 1 1 1 0 0 1
–   Aldebaran 0.7.01794+19
−19		(−43)19 − 13
(+14−8=10)
59.4%
19.0 / 32
100.0%
+19
51.6%
1484
0.70
766
1 = 1 1 1 1 = 1 0 0 0 = 0 1 1 0 = 1 = 1 = 0 0 1 1 = = 1 0 1 = =
–   Adamant 1.71790+19
−19		(−47)21 − 11
(+18−8=6)
65.6%
21.0 / 32
100.0%
+73
58.8%
1756
0.63
1032
1 = 1 0 1 = 1 1 1 1 0 = 1 0 1 1 0 = 1 0 0 1 1 1 0 = 1 = 1 1 0 1
–   SEE 0.6.91781+21
−21		(−56)19 − 13
(+18−12=2)
59.4%
19.0 / 32
100.0%
+23
47.0%
2108
0.89
991
1 1 1 0 0 0 1 0 0 1 0 1 0 0 1 1 1 0 1 1 1 1 1 1 = 0 0 1 = 1 0 1
–   Mizar 3.01767+20
−20		(−70)22.5 − 9.5
(+22−9=1)
70.3%
22.5 / 32
100.0%
+108
45.5%
1994
1.16
907
1 1 = 0 0 1 1 1 1 1 1 1 0 1 1 0 0 1 0 1 0 1 1 1 1 1 0 0 1 1 1 1
–   Belzebub 0.671744+22
−22		(−93)21.5 − 10.5
(+18−7=7)
67.2%
21.5 / 32
100.0%
+32
45.6%
1725
1.33
786
= 1 1 = 0 1 0 1 0 1 1 = 1 0 = 1 1 0 0 = 1 1 1 1 1 1 = = 1 1 1 0
–   ALChess 1.5b1729+22
−22		(−108)22 − 10
(+20−8=4)
68.8%
22.0 / 32
100.0%
+41
50.2%
1627
0.71
817
0 1 0 0 1 = 1 1 1 1 1 0 0 1 1 = 1 = 1 0 1 0 1 0 1 1 1 1 1 1 = 1
–   IQ23 0031716+23
−23		(−121)19.5 − 12.5
(+15−8=9)
60.9%
19.5 / 32
100.0%
−46
42.4%
967
0.70
410
0 1 = 1 1 1 = 1 1 0 1 = 0 = 1 1 1 1 0 = 0 1 1 1 = = 1 0 = = 0 0
–   Rainman 0.7.51687+24
−24		(−150)22 − 10
(+19−7=6)
68.8%
22.0 / 32
100.0%
−8
47.1%
1634
0.92
769
= 0 1 1 1 1 0 = 1 1 = = = 1 0 1 = 1 1 1 1 0 1 0 0 1 1 1 1 1 0 1
–   Storm 0.61673+25
−25		(−164)26 − 6
(+25−5=2)
81.3%
26.0 / 32
100.0%
+114
52.2%
1581
0.84
825
1 1 1 1 1 1 1 1 1 0 1 1 1 = 1 1 = 1 1 0 1 1 1 1 0 1 0 1 1 1 0 1
–   Zotron 4.4.61669+24
−24		(−168)27 − 5
(+25−3=4)
84.4%
27.0 / 32
100.0%
+124
40.3%
1757
1.05
708
1 1 1 0 = = 1 1 1 0 1 1 1 1 1 = 1 1 1 1 0 1 1 1 1 1 = 1 1 1 1 1
–   Needle 0.53.11648+25
−25		(−189)23.5 − 8.5
(+20−5=7)
73.4%
23.5 / 32
100.0%
−15
51.3%
1559
0.75
800
1 = = 1 0 1 0 1 1 1 1 = 1 = 1 1 0 1 = 1 1 0 1 1 = 1 1 0 1 1 = 1
–   Exacto 0.d1607+26
−26		(−230)27.5 − 4.5
(+25−2=5)
85.9%
27.5 / 32
100.0%
+68
41.3%
768
1.18
317
1 1 = 1 1 1 1 1 1 1 1 = 0 1 1 1 1 1 0 1 1 1 1 1 = 1 = 1 1 1 1 =
–   Piranha 0.51574+28
−28		(−263)28 − 4
(+27−3=2)
87.5%
28.0 / 32
100.0%
+90
49.2%
1998
0.73
983
1 1 1 1 1 1 1 0 = 1 1 1 1 1 1 1 1 1 1 = 1 1 1 0 1 1 1 1 1 0 1 1
1280 games in total: 494 wins, 614 losses, 172 draws (13.4%), score: 45.3%
Average opponent: +39.3 (1876.3), average distance to opponent: 128.1

Performance

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

Perf = C − 0.306 [±0.130] * 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