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
Chezzz 1.0.3 WB#87  (2409+15
−15		)Quote
Author: David Rasmussen (Denmark) Released: 2003-02-20Link: Homepage
This engine is stable and runs without issues.
This is the only Chezzz version we tested.
OpponentEloDiffResultsScoreLOSPerfPond
hit		Eval
diff
–   Quark 2.352536+16
−16		(+127)6.5 − 20.5
(+3−17=7)
24.1%
6.5 / 27
0.0%
−58
56.0%
1988
0.86
1113
0 0 0 = = 0 = 0 = 0 = 0 0 1 1 = 0 0 0 = 0 0 0 0 1 0 0
–   Dragon 4.62524+16
−16		(+115)6.5 − 19.5
(+6−19=1)
25.0%
6.5 / 26
0.0%
−105
56.6%
2332
0.81
1321
0 0 0 1 0 0 0 0 1 0 0 1 1 0 0 1 0 0 0 0 1 0 0 0 = 0
–   Snitch 1.6.2 32-bit2521+15
−15		(+112)6 − 22
(+5−21=2)
21.4%
6.0 / 28
0.0%
−137
52.9%
2581
0.90
1366
1 0 = 0 0 0 1 = 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0
–   Nejmet 3.072521+16
−16		(+112)9.5 − 15.5
(+6−12=7)
38.0%
9.5 / 25
0.0%
+31
52.8%
1887
0.73
996
= 0 0 = 1 0 1 0 = 0 1 0 1 0 0 0 = 0 = = 1 1 0 0 =
–   Amy 0.8.7b DC2500+17
−17		(+91)11.5 − 13.5
(+10−12=3)
46.0%
11.5 / 25
0.0%
+64
56.6%
2301
0.64
1303
1 0 0 0 1 0 0 0 0 1 1 0 1 1 = 0 0 = 0 1 1 0 = 1 1
–   KnightDreamer 3.32499+16
−16		(+90)10.5 − 15.5
(+7−12=7)
40.4%
10.5 / 26
0.0%
+22
52.0%
2035
0.82
1058
0 0 = 0 0 1 0 = = = 0 0 1 0 1 1 0 = 1 0 1 0 0 1 = =
–   Francesca MAD 0.13 Nobook2493+19
−19		(+84)5.5 − 12.5
(+4−11=3)		30.6%
5.5 / 18
0.0%
−67
64.9%
1097
0.97
712
0 0 1 0 0 0 0 0 1 0 = 1 0 = 0 = 1 0
–   Leila 0.53h2490+17
−17		(+81)9.5 − 20.5
(+6−17=7)
31.7%
9.5 / 30
0.0%
−50
50.8%
2195
0.74
1115
0 1 0 0 1 = 0 0 = 1 0 0 = 0 1 1 1 0 0 = = 0 = = 0 0 0 0 0 0
–   Diablo 0.5.1 JA2482+16
−16		(+73)10.5 − 21.5
(+6−17=9)
32.8%
10.5 / 32
0.0%
−46
53.7%
2468
0.60
1325
= 0 = = = 0 0 0 0 0 1 0 0 = = 0 1 = 0 0 0 1 1 0 = 0 0 1 1 0 0 =
–   PostModernist 10162480+16
−16		(+71)11 − 21
(+6−16=10)
34.4%
11.0 / 32
0.0%
−33
59.6%
1961
0.79
1169
0 1 = 0 0 0 = 0 0 0 1 = 0 0 1 = 1 0 = 0 0 0 0 1 = = = 0 = 1 0 =
–   Djinn 0.925x2479+16
−16		(+70)10 − 16
(+7−13=6)
38.5%
10.0 / 26
0.0%
−13
53.5%
2245
0.65
1201
0 0 0 = 1 0 1 1 0 1 0 1 0 1 = 0 0 0 0 0 1 = = = 0 =
–   Comet B682478+14
−14		(+69)7.5 − 14.5
(+6−13=3)
34.1%
7.5 / 22
0.0%
−60
54.0%
1803
0.91
974
1 0 0 0 1 1 = 0 = = 0 0 0 0 0 1 1 0 0 0 0 1
–   Sjeng 12.132475+14
−14		(+66)13 − 16
(+11−14=4)
44.8%
13.0 / 29
0.0%
+24
57.4%
2024
0.82
1162
0 0 1 = 0 1 0 0 1 1 1 0 1 0 0 = 1 0 0 0 1 0 1 1 0 = 1 = 0
–   Muse 0.899b2474+16
−16		(+65)12.5 − 14.5
(+9−11=7)
46.3%
12.5 / 27
0.0%
+41
54.8%
1911
0.94
1048
= 0 1 0 = 0 = 1 1 0 = = 0 0 1 1 0 1 1 0 = 0 = 1 0 1 0
–   Queen 4.032466+17
−17		(+57)13 − 19
(+8−14=10)
40.6%
13.0 / 32
0.0%
−6
54.0%
2346
0.69
1266
0 0 1 1 = = 0 = = 0 1 0 = = 1 0 = 0 0 1 0 = 1 = = 1 0 1 0 0 0 0
–   Patzer 3.802460+16
−16		(+51)13.5 − 18.5
(+11−16=5)
42.2%
13.5 / 32
0.0%
−8
51.2%
2022
1.04
1035
0 0 1 0 0 0 0 = = 1 = 1 0 0 1 1 = 0 1 = 1 0 0 0 1 1 0 1 0 1 0 0
–   The Crazy Bishop 00522460+15
−15		(+51)14.5 − 13.5
(+12−11=5)
51.8%
14.5 / 28
0.0%
+63
57.7%
2575
0.58
1487
1 1 1 0 0 1 = = 0 0 0 1 1 0 0 0 1 1 0 0 1 1 = 0 = = 1 1
–   Gosu 0.162455+16
−16		(+46)14 − 18
(+11−15=6)
43.8%
14.0 / 32
0.0%
0
53.7%
2603
0.75
1399
1 0 0 0 0 = = 0 1 1 0 0 0 1 1 = 1 1 = 0 0 0 0 = 1 1 = 1 0 0 1 0
–   Der Bringer 1.92455+15
−15		(+46)8.5 − 18.5
(+6−16=5)
31.5%
8.5 / 27
0.0%
−91
56.3%
1926
0.59
1084
= 0 1 = 0 0 1 0 0 = 0 0 = 0 1 0 0 = 1 0 1 0 0 0 1 0 0
–   Homer 2.012452+17
−17		(+43)12.5 − 19.5
(+10−17=5)
39.1%
12.5 / 32
0.0%
−39
52.3%
2482
1.11
1298
= = 1 0 0 0 1 0 0 0 0 0 1 1 = 0 0 0 0 1 = 1 0 1 0 1 1 1 0 = 0 0
–   Phalanx XXII Reborn JA2452+15
−15		(+43)8 − 18
(+6−16=4)
30.8%
8.0 / 26
0.0%
−105
53.1%
1981
0.85
1051
0 0 1 1 0 1 0 0 0 1 0 0 = 0 0 = = 0 1 0 = 1 0 0 0 0
–   Betsy 6.51 Nobook2450+15
−15		(+41)11.5 − 16.5
(+6−11=11)
41.1%
11.5 / 28
0.0%
−17
55.0%
1681
0.73
924
0 0 1 = 0 0 1 = 1 = 1 = = = 0 = = = 0 1 = 1 0 = 0 0 0 0
–   GNU Chess 5.07.9b 64-bit JA2448+16
−16		(+39)14.5 − 17.5
(+11−14=7)
45.3%
14.5 / 32
0.0%
+4
51.8%
2271
0.95
1177
1 1 0 1 = 0 = 1 = 0 0 0 1 0 0 0 = 1 1 = 1 0 1 0 0 0 1 = 1 = 0 0
–   Amateur 2.822446+15
−15		(+37)17 − 8
(+14−5=6)
68.0%
17.0 / 25
0.0%
+164
55.2%
1717
1.09
947
= 0 1 = 1 1 0 = 1 1 1 1 1 1 1 = 0 = 1 0 = 1 0 1 1
–   Tytan 9.32 64-bit2429+17
−17		(+20)17 − 15
(+13−11=8)
53.1%
17.0 / 32
3.8%
+41
  
1 = 0 0 0 0 1 1 0 0 = = = 1 0 1 1 1 0 0 1 = = 1 0 = = 1 1 1 0 1
–   Sage 3.532424+19
−19		(+15)17.5 − 14.5
(+12−9=11)
54.7%
17.5 / 32
9.3%
+45
52.5%
1955
1.05
1027
1 1 0 1 = = 0 = 1 1 0 0 0 1 = = 1 0 1 = = 1 1 = 1 1 0 0 = 0 = =
–   Sorgenkind 0.42421+18
−18		(+12)13.5 − 18.5
(+10−15=7)
42.2%
13.5 / 32
15.2%
−45
56.4%
2292
1.14
1293
= 0 0 0 1 1 0 1 1 = 0 = 0 0 0 0 1 1 0 1 = 0 0 1 1 = 1 = = 0 0 0
–   Horizon 4.42419+18
−18		(+10)13.5 − 18.5
(+9−14=9)
42.2%
13.5 / 32
19.0%
−45
50.5%
2049
1.39
1035
= 0 0 1 = = 1 0 = 0 0 0 1 = = 1 = 1 0 0 0 0 1 = 1 1 = 0 1 0 0 0
–   Thor's Hammer 2.28 32-bit2417+15
−15		(+8)14.5 − 15.5
(+12−13=5)
48.3%
14.5 / 30
21.2%
−3
52.7%
2516
0.88
1327
0 = = 0 0 = 0 0 0 0 1 1 0 1 1 1 0 1 1 0 = 1 0 = 1 1 0 1 1 0
–   Arion 1.72415+16
−16		(+6)13.5 − 10.5
(+12−9=3)
56.3%
13.5 / 24
28.9%
+56
59.0%
1814
0.63
1071
1 = 0 0 0 1 0 1 1 0 0 1 1 0 1 = = 0 1 1 0 1 1 1
–   AICE 0.99.22411+16
−16		(+2)18 − 14
(+15−11=6)
56.3%
18.0 / 32
41.1%
+50
54.3%
2407
0.84
1306
0 = = = 0 = 0 1 0 1 1 1 0 0 1 0 1 0 1 0 1 1 1 = 1 0 1 1 1 0 1 =
–   Asterisk 0.62402+17
−17		(−7)17 − 15
(+13−11=8)
53.1%
17.0 / 32
73.3%
+15
54.6%
2604
0.50
1421
0 1 1 1 = 0 1 = = 0 1 1 0 = 0 1 = 0 0 = 1 0 1 0 0 = 1 1 1 1 = 0
–   Resp 0.19 64-bit JA Nobook2402+16
−16		(−7)7.5 − 13.5
(+5−11=5)
35.7%
7.5 / 21
72.7%
−105
53.6%
2144
0.61
1150
= 0 0 0 = 0 0 0 0 0 1 0 1 = 1 0 1 = 0 = 1
–   Averno 0.812396+15
−15		(−13)13.5 − 10.5
(+12−9=3)
56.3%
13.5 / 24
89.1%
+35
51.8%
1893
0.64
981
1 1 0 = 1 1 0 0 0 = = 0 1 1 1 0 1 1 0 0 1 0 1 1
–   Scidlet 3.61 64-bit JA2390+15
−15		(−19)10.5 − 13.5
(+9−12=3)
43.8%
10.5 / 24
96.4%
−66
56.2%
2066
0.67
1161
0 1 0 0 0 0 1 0 = 1 1 0 1 1 1 0 1 0 0 = = 0 1 0
–   KnightX 1.922385+15
−15		(−24)10 − 13
(+7−10=6)
43.5%
10.0 / 23
98.9%
−67
50.9%
1476
0.78
751
1 = 1 1 0 0 1 0 = = 0 = = 0 0 0 0 = 1 0 1 1 0
–   Eeyore 1.482384+15
−15		(−25)12.5 − 13.5
(+8−9=9)
48.1%
12.5 / 26
99.1%
−38
53.1%
1577
0.84
837
0 0 = = = = = 1 1 1 0 = 0 0 = 0 0 1 0 0 1 1 1 1 = =
–   Ayito 0.2.9942371+16
−16		(−38)15 − 14
(+12−11=6)
51.7%
15.0 / 29
100.0%
−28
51.7%
2496
0.89
1291
1 1 1 0 = 0 0 = 1 = 0 1 1 0 = 0 = 1 1 0 0 1 0 1 0 1 = 0 1
–   Matilde 2008 64-bit2368+15
−15		(−41)17 − 15
(+15−13=4)
53.1%
17.0 / 32
100.0%
−16
55.6%
2276
0.68
1266
1 0 0 1 1 = 0 0 1 1 1 0 = 1 0 1 1 = 0 0 0 1 1 0 = 1 0 0 0 1 1 1
–   Natwarlal 0.142359+17
−17		(−50)20.5 − 11.5
(+17−8=7)
64.1%
20.5 / 32
100.0%
+53
54.9%
2687
0.70
1475
1 1 = 0 1 1 = 0 1 0 = 0 0 = 0 1 0 = 1 1 = 1 0 1 = 1 1 1 1 1 1 1
–   EXchess 5.01 beta 64-bit JA2355+14
−14		(−54)18 − 9
(+15−6=6)
66.7%
18.0 / 27
100.0%
+70
53.3%
2235
0.76
1192
= 0 1 1 1 1 1 1 1 0 = 1 = = = 0 1 1 0 1 0 1 0 1 = 1 1
–   Zeus 1.292346+16
−16		(−63)20 − 12
(+20−12=0)
62.5%
20.0 / 32
100.0%
+47
51.5%
3243
0.77
1670
1 1 0 1 1 0 0 1 0 1 0 1 1 1 0 1 1 0 0 1 1 1 1 1 0 1 1 0 1 1 0 0
–   Esc 1.162345+15
−15		(−64)19 − 10
(+16−7=6)
65.5%
19.0 / 29
100.0%
+49
50.8%
2694
0.81
1368
0 1 1 1 0 1 1 = = 0 1 = 1 1 1 0 = 1 0 1 1 1 1 1 1 0 = = 0
–   Popochin 3.22341+19
−19		(−68)16 − 16
(+13−13=6)
50.0%
16.0 / 32
100.0%
−69
55.8%
2947
0.59
1643
1 0 0 = 1 = 0 0 = 1 0 1 1 1 0 = = 0 0 1 1 0 1 = 0 1 0 0 1 1 1 0
–   ANT 2006-F2333+16
−16		(−76)18 − 9
(+14−5=8)
66.7%
18.0 / 27
100.0%
+38
52.7%
1754
0.50
925
0 1 = 1 0 1 1 1 = 1 1 1 = = 0 = = 1 0 = 1 1 0 1 1 1 =
–   GNU Chess 5.07 64-bit JA2332+22
−22		(−77)18 − 9
(+17−8=2)
66.7%
18.0 / 27
100.0%
+60
54.5%
1781
0.79
970
= 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 0 1 0 0 0 0 1 0 0 1 =
–   Anechka 0.082320+16
−16		(−89)19 − 13
(+17−11=4)
59.4%
19.0 / 32
100.0%
−15
51.7%
2836
0.81
1466
1 1 1 1 1 1 0 0 0 1 = 0 0 1 0 0 1 = 1 1 1 1 = 1 0 1 1 1 0 0 0 =
–   Dorky 3.482308+16
−16		(−101)18 − 7
(+16−5=4)
72.0%
18.0 / 25
100.0%
+68
53.6%
2074
1.04
1112
1 1 1 = 1 1 1 1 1 1 0 = = 1 1 = 1 0 1 0 1 1 1 0 0
–   CyberPagno 2.1 32MB2295+16
−16		(−114)15 − 9
(+13−7=4)
62.5%
15.0 / 24
100.0%
−16
48.2%
2254
0.75
1086
0 0 = 1 0 0 1 0 1 1 = 1 1 1 = 1 1 1 1 0 1 = 0 1
–   Latista (Sinobyl) 1.52289+16
−16		(−120)18 − 10
(+16−8=4)
64.3%
18.0 / 28
100.0%
−9
53.7%
2319
0.69
1245
0 0 1 = 0 1 = 1 = 0 1 1 1 1 1 0 1 1 1 0 = 0 1 1 1 1 0 1
–   Madeleine 0.22285+15
−15		(−124)20.5 − 6.5
(+19−5=3)
75.9%
20.5 / 27
100.0%
+88
55.1%
2515
0.81
1385
0 1 0 1 1 1 1 1 1 1 1 0 1 = 1 1 0 1 1 1 0 1 1 1 1 = =
–   Chispa 4.0.32273+14
−14		(−136)19.5 − 8.5
(+14−3=11)
69.6%
19.5 / 28
100.0%
−10
54.5%
1870
0.78
1019
= 1 1 1 1 = = 1 = 1 = 0 1 = 1 0 = 1 1 = = 1 = 1 0 1 1 =
–   Atlas 2.202271+17
−17		(−138)13.5 − 11.5
(+12−10=3)
54.0%
13.5 / 25
100.0%
−108
  
1 1 1 = 1 0 = 1 0 0 1 0 0 = 1 1 0 0 0 0 1 1 0 1 1
–   Genesis 2.02247+16
−16		(−162)22.5 − 5.5
(+21−4=3)
80.4%
22.5 / 28
100.0%
+94
58.3%
2329
0.60
1358
1 1 = 0 1 1 1 1 1 = 1 = 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1 1
–   InmiChess 3.06N2241+15
−15		(−168)18 − 6
(+15−3=6)
75.0%
18.0 / 24
100.0%
+15
57.1%
1576
0.70
900
1 1 1 = 1 = 0 1 1 0 1 1 1 1 1 0 = 1 = 1 = 1 = 1
–   Nesik 0.7.0 alpha2237+16
−16		(−172)17.5 − 7.5
(+16−6=3)
70.0%
17.5 / 25
100.0%
−8
57.1%
2204
0.63
1258
1 1 0 1 1 1 1 1 0 1 = 0 1 0 = 1 0 = 0 1 1 1 1 1 1
–   Sunsetter C10.3 64-bit JA2232+16
−16		(−177)14.5 − 8.5
(+13−7=3)
63.0%
14.5 / 23
100.0%
−73
54.1%
2198
0.90
1190
1 1 1 1 1 0 0 0 0 = 0 1 0 1 1 1 = = 1 1 0 1 1
–   Fortress 1.622216+15
−15		(−193)22 − 4
(+20−2=4)
84.6%
22.0 / 26
100.0%
+89
52.7%
2455
0.95
1293
1 0 1 1 = 1 1 = 1 1 1 1 1 1 1 = 1 1 1 = 1 1 1 0 1 1
–   WJChess 1.642215+16
−16		(−194)17.5 − 4.5
(+15−2=5)
79.5%
17.5 / 22
100.0%
+24
57.2%
1704
0.73
975
= 1 = 1 = 0 1 = 1 0 1 1 1 1 1 1 1 1 = 1 1 1
–   Gk 0.90 64-bit JA2194+16
−16		(−215)19.5 − 3.5
(+17−1=5)
84.8%
19.5 / 23
100.0%
+54
52.1%
2187
0.80
1140
1 1 1 1 = 1 0 1 1 1 1 1 1 = 1 = 1 = 1 1 1 1 =
–   Matheus 2.32144+15
−15		(−265)20 − 7
(+17−4=6)
74.1%
20.0 / 27
100.0%
−86
59.7%
2018
0.72
1205
1 1 1 1 = = = 1 0 1 1 1 1 1 1 = 0 0 1 = 1 0 1 1 1 = 1
–   Bodo 0.2b2137+15
−15		(−272)24 − 4
(+23−3=2)
85.7%
24.0 / 28
100.0%
+55
51.0%
1824
0.69
931
1 1 1 1 1 1 0 1 1 = 1 1 1 1 1 1 0 1 1 1 = 1 1 1 1 1 0 1
–   Bestia 0.902122+15
−15		(−287)21 − 2
(+20−1=2)
91.3%
21.0 / 23
100.0%
+106
55.2%
1814
0.70
1001
1 1 1 0 1 1 1 1 1 1 1 = 1 1 = 1 1 1 1 1 1 1 1
–   Ax 0.82119+15
−15		(−290)28 − 1
(+28−1=0)
96.6%
28.0 / 29
100.0%
+331
  
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1
1765 games in total: 775 wins, 650 losses, 340 draws (19.3%), score: 53.5%
Average opponent: −29.9 (2379.1), average distance to opponent: 84.6

Performance

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

Perf = C − 0.261 [±0.157] * 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