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

Options
Show each game results
JanWillem 1.13 WB#142–143  (2062+16
−16		)Quote
Author: Laurens Winkelhagen (Netherlands) Released: 2004-12-09Link: RWBC
This engine is stable and runs without issues.
This is the only JanWillem version we tested.
OpponentEloDiffResultsScoreLOSPerfPond
hit		Eval
diff
–   Esc 1.162345+15
−15		(+283)2 − 22
(+2−22=0)
8.3%
2.0 / 24
0.0%
−181
53.9%
2120
1.10
1142
0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0
–   Dorky 3.482308+16
−16		(+246)3.5 − 24.5
(+2−23=3)
12.5%
3.5 / 28
0.0%
−90
52.4%
2125
1.37
1114
0 = 0 1 0 0 0 0 0 0 0 0 0 = 0 = 0 0 0 0 0 1 0 0 0 0 0 0
–   CyberPagno 2.1 32MB2295+16
−16		(+233)8 − 19
(+6−17=4)
29.6%
8.0 / 27
0.0%
+73
53.8%
2180
0.70
1173
0 0 0 0 0 1 1 0 0 0 0 = = 0 1 = 1 0 0 0 0 0 1 0 = 0 1
–   Latista (Sinobyl) 1.52289+16
−16		(+227)8.5 − 18.5
(+6−16=5)
31.5%
8.5 / 27
0.0%
+89
54.1%
1689
0.84
914
0 0 0 1 = 1 0 0 1 0 = 1 1 1 0 0 0 0 0 0 0 0 0 = 0 = =
–   Madeleine 0.22285+15
−15		(+223)4.5 − 18.5
(+3−17=3)
19.6%
4.5 / 23
0.0%
−31
52.5%
1753
1.12
921
= 0 0 0 0 0 0 0 = 0 0 0 0 0 1 0 1 = 0 0 0 0 1
–   Chispa 4.0.32273+14
−14		(+211)6.5 − 20.5
(+4−18=5)
24.1%
6.5 / 27
0.0%
+12
56.2%
1705
1.07
958
1 0 0 = 1 0 0 0 0 = 0 0 = 1 0 0 0 0 = 0 0 0 0 1 = 0 0
–   Atlas 2.202271+17
−17		(+209)7.5 − 17.5
(+4−14=7)
30.0%
7.5 / 25
0.0%
+70
  
= 0 0 0 = = 0 1 0 0 = 1 1 0 0 0 0 = 0 0 = 0 0 = 1
–   Genesis 2.02247+16
−16		(+185)3.5 − 23.5
(+1−21=5)
13.0%
3.5 / 27
0.0%
−113
57.5%
1689
0.59
971
0 = 0 0 0 0 1 = 0 0 0 = = 0 0 0 0 0 0 0 0 0 0 = 0 0 0
–   InmiChess 3.06N2241+15
−15		(+179)10 − 18
(+6−14=8)
35.7%
10.0 / 28
0.0%
+80
53.1%
1643
0.80
872
1 0 0 0 0 = 0 0 1 1 = = 0 0 0 0 = 1 0 = 1 = = = 1 0 0 0
–   Nesik 0.7.0 alpha2237+16
−16		(+175)6 − 24
(+5−23=2)
20.0%
6.0 / 30
0.0%
−86
51.5%
2924
1.44
1505
= 0 0 0 1 0 1 1 0 0 0 0 0 1 0 0 0 0 0 = 0 0 0 0 0 0 1 0 0 0
–   Sunsetter C10.3 64-bit JA2232+16
−16		(+170)10.5 − 12.5
(+10−12=1)
45.7%
10.5 / 23
0.0%
+130
52.5%
1778
0.78
934
0 0 1 1 0 0 1 = 0 1 1 0 0 1 0 1 0 0 1 0 0 1 1
–   Alarm 0.93.12226+16
−16		(+164)5.5 − 26.5
(+4−25=3)
17.2%
5.5 / 32
0.0%
−120
55.1%
2219
1.47
1222
1 0 0 1 = 0 0 0 = 0 0 = 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0
–   Fortress 1.622216+15
−15		(+154)4 − 16
(+2−14=4)
20.0%
4.0 / 20
0.0%
−81
52.7%
1493
1.07
787
0 0 0 0 0 0 0 0 0 0 = 1 = = 0 1 0 0 = 0
–   WJChess 1.642215+16
−16		(+153)9.5 − 19.5
(+7−17=5)
32.8%
9.5 / 29
0.0%
+22
57.8%
2146
1.05
1240
= 1 1 1 0 0 0 = 0 1 0 0 = 0 0 0 0 = 0 1 0 = 0 0 1 0 0 1 0
–   Gk 0.90 64-bit JA2194+16
−16		(+132)9.5 − 18.5
(+7−16=5)
33.9%
9.5 / 28
0.0%
+13
53.2%
1843
0.81
981
1 0 1 0 = 0 0 0 0 0 = 0 = = 1 0 1 0 0 1 = 0 1 0 1 0 0 0
–   Alf 1.09 JA2193+17
−17		(+131)9 − 23
(+5−19=8)
28.1%
9.0 / 32
0.0%
−24
54.9%
1847
0.83
1014
0 0 0 0 0 = 0 0 = 0 0 = 0 0 = 0 0 0 0 0 = 1 1 0 0 1 0 1 = = = 1
–   Ghost 0.142189+17
−17		(+127)8.5 − 23.5
(+6−21=5)
26.6%
8.5 / 32
0.0%
−55
51.4%
2455
1.27
1262
= 0 0 0 0 0 1 = 0 1 0 0 = 0 0 0 0 0 0 = 0 0 0 0 0 = 1 1 0 1 1 0
–   Wing 2.0a2179+16
−16		(+117)6 − 24
(+3−21=6)
20.0%
6.0 / 30
0.0%
−112
53.5%
1713
1.01
917
0 = 0 0 = 0 0 = = 0 0 0 0 0 = 0 0 0 1 0 0 0 0 1 0 0 0 = 0 1
–   Uragano 3D 0.872174+16
−16		(+112)13 − 19
(+10−16=6)
40.6%
13.0 / 32
0.0%
+44
50.8%
2298
0.85
1167
1 1 0 0 0 = 1 0 1 = = 0 0 0 1 = 0 0 0 0 0 0 = 1 0 1 1 1 0 1 = 0
–   Parrot 0707222161+17
−17		(+99)12.5 − 19.5
(+10−17=5)
39.1%
12.5 / 32
0.0%
+15
49.1%
2326
1.53
1143
0 = 0 0 0 1 0 0 1 = 1 1 0 0 0 0 0 = 0 0 0 1 = 1 1 1 0 1 0 1 = 0
–   Matheus 2.32144+15
−15		(+82)15.5 − 13.5
(+11−9=9)
53.4%
15.5 / 29
0.0%
+107
56.7%
1838
0.75
1042
1 1 = = = 0 1 = 0 1 1 0 = = 1 1 1 0 0 0 = = 1 0 0 1 0 = 1
–   Bodo 0.2b2137+15
−15		(+75)8.5 − 14.5
(+5−11=7)
37.0%
8.5 / 23
0.0%
−11
49.4%
1196
0.72
591
0 = = 0 1 0 1 0 1 0 = 1 0 0 0 1 = = = 0 = 0 0
–   Monarch 1.72131+16
−16		(+69)18 − 14
(+15−11=6)
56.3%
18.0 / 32
0.0%
+117
48.3%
2492
1.17
1204
1 1 1 1 0 1 = 0 0 1 = = = 0 1 0 0 0 1 0 = 1 = 1 1 1 0 1 0 1 0 1
–   Bestia 0.902122+15
−15		(+60)13.5 − 15.5
(+11−13=5)
46.6%
13.5 / 29
0.0%
+35
56.8%
2243
0.88
1273
= 1 0 0 1 0 = 0 0 1 0 1 0 1 1 1 = = 1 0 0 0 1 0 1 0 1 = 0
–   Ax 0.82119+15
−15		(+57)8 − 17
(+5−14=6)
32.0%
8.0 / 25
0.0%
−74
  
0 = 0 1 1 = 0 0 1 0 1 1 = 0 0 0 0 0 0 = = = 0 0 0
–   Gerbil 02 64-bit JA2118+18
−18		(+56)13.5 − 18.5
(+9−14=9)
42.2%
13.5 / 32
0.0%
+2
54.4%
1963
0.69
1068
1 1 = 0 = 1 1 0 1 = 1 0 = 0 = = 1 0 0 = 1 0 0 0 = 0 0 0 1 = 0 0
–   BigLion 2.23x2117+17
−17		(+55)10.5 − 21.5
(+8−19=5)
32.8%
10.5 / 32
0.0%
−77
51.5%
2674
0.92
1376
= = 1 0 = 0 0 0 1 0 1 0 = 0 0 0 0 1 0 0 0 0 1 1 1 0 0 0 1 = 0 0
–   RDChess 3.232117+16
−16		(+55)8 − 24
(+4−20=8)
25.0%
8.0 / 32
0.0%
−128
51.3%
2201
1.34
1129
1 0 0 = = 0 1 0 0 = 0 0 0 = 0 0 0 0 = 0 1 = 0 0 0 0 0 0 0 = 1 =
–   DelphiMax 2.92102+16
−16		(+40)13.5 − 12.5
(+11−10=5)
51.9%
13.5 / 26
0.0%
+50
55.4%
2183
1.04
1209
0 0 = 0 1 1 1 = 0 0 = 1 1 0 1 0 0 1 0 1 1 1 1 0 = =
–   Armageddon 2.3082098+17
−17		(+36)16.5 − 15.5
(+14−13=5)
51.6%
16.5 / 32
0.0%
+46
52.5%
2343
1.15
1231
= = 1 0 = 0 0 1 1 1 0 1 1 1 0 0 1 0 = 0 0 1 = 0 1 1 0 1 0 1 0 1
–   Requiem 0.532084+15
−15		(+22)12 − 20
(+4−12=16)
37.5%
12.0 / 32
1.7%
−51
52.8%
1168
0.67
617
= 0 = 0 = 0 0 = 0 0 0 = = 1 0 1 = = = 0 = = 1 = 1 = 0 0 0 = = =
–   Small Potato 0.6.12082+16
−16		(+20)15 − 17
(+12−14=6)
46.9%
15.0 / 32
2.7%
−5
55.7%
2080
0.75
1158
0 1 1 = 0 = 0 0 1 1 0 0 1 1 1 0 1 0 = = 1 0 0 0 0 1 = 0 1 0 = 1
–   Elephant 1.062075+16
−16		(+13)12.5 − 13.5
(+10−11=5)
48.1%
12.5 / 26
10.7%
−5
50.2%
1445
0.82
726
= 0 0 = 1 1 0 1 0 = 0 1 = 1 1 0 0 1 = 0 1 0 1 0 0 1
–   La Dame Blanche 2.0c2070+19
−19		(+8)18.5 − 13.5
(+14−9=9)
57.8%
18.5 / 32
24.7%
+60
51.8%
1779
1.19
921
1 0 = 1 1 0 = = 0 1 1 1 = 1 1 0 = = 0 0 = 1 1 1 1 1 0 = = 1 0 0
–   Cilian 4.142069+16
−16		(+7)16 − 16
(+13−13=6)
50.0%
16.0 / 32
24.8%
+7
  
= = 0 0 1 1 1 0 1 0 1 0 0 1 0 1 = 0 1 0 0 1 0 0 1 = = 0 1 1 1 =
–   Etude 0.1.22063+19
−19		(+1)17 − 15
(+14−12=6)
53.1%
17.0 / 32
45.5%
+26
52.5%
2354
0.72
1236
0 = = 1 = 1 1 1 = 1 1 1 0 1 0 0 0 0 0 0 = 1 1 1 0 1 0 0 = 0 1 1
–   Gullydeckel 2.16pl12062+19
−19		(0)15 − 17
(+12−14=6)
46.9%
15.0 / 32
50.4%
−24
52.0%
2543
1.02
1323
0 1 = 1 0 0 = 0 1 = 1 0 0 0 1 1 1 0 = 0 1 = 1 1 0 0 1 0 1 0 = 0
–   Marvin 1.3.02054+16
−16		(−8)14.5 − 14.5
(+11−11=7)
50.0%
14.5 / 29
78.3%
−6
54.2%
1965
0.73
1065
= = 1 0 0 1 = = 0 1 0 0 1 = 0 = 1 0 1 0 = 0 1 1 0 1 1 0 1
–   Matant 5.042053+17
−17		(−9)16.5 − 15.5
(+14−13=5)
51.6%
16.5 / 32
79.2%
+2
50.6%
2056
1.03
1040
1 = 0 0 0 0 0 = 0 1 1 0 0 1 1 0 1 0 1 0 1 = 1 = 1 0 = 0 1 1 1 1
–   SSEChessII 2.05 DC2049+17
−17		(−13)16.5 − 15.5
(+13−12=7)
51.6%
16.5 / 32
89.0%
0
51.7%
2382
1.04
1231
= 0 0 = 0 0 1 = 0 = 0 1 0 1 0 1 0 = 1 0 0 1 = 1 1 1 1 = 1 1 1 0
–   Faile 1.4.42042+15
−15		(−20)12 − 15
(+11−14=2)
44.4%
12.0 / 27
97.4%
−68
56.7%
2502
0.69
1418
1 1 0 0 0 0 1 = 0 0 1 1 0 = 0 0 0 0 1 1 0 1 0 1 1 0 1
–   Smash 1.0.32036+17
−17		(−26)18 − 14
(+13−9=10)
56.3%
18.0 / 32
99.1%
+15
50.4%
2157
0.78
1088
1 1 1 0 0 1 0 1 = 1 0 = = 1 = = = = = 0 0 1 1 1 0 1 = 0 1 1 0 =
–   Micro-Max 4.8 PIV DM2028+17
−17		(−34)19 − 13
(+15−9=8)
59.4%
19.0 / 32
99.9%
+31
75.1%
2559
1.18
1921
1 0 0 0 = 1 1 0 0 = 1 1 1 = = 0 0 1 1 1 1 1 1 = 0 1 1 = 1 = = 0
–   Sharper 0.172022+16
−16		(−40)15 − 12
(+12−9=6)
55.6%
15.0 / 27
100.0%
0
47.2%
1689
1.30
798
0 = 1 0 1 0 1 1 = 0 0 = = 0 = 1 1 0 1 = 1 1 0 1 1 0 1
–   Mustang 4.972021+17
−17		(−41)17 − 15
(+14−12=6)
53.1%
17.0 / 32
100.0%
−16
52.6%
1956
0.97
1029
0 0 1 1 0 0 1 0 = 1 = 0 1 0 = 1 0 1 1 = 0 1 1 1 = 1 0 = 1 0 0 1
–   Rival UCI 1.182021+17
−17		(−41)18 − 14
(+14−10=8)
56.3%
18.0 / 32
100.0%
+2
54.9%
2438
1.02
1339
= 0 = = 0 = 1 1 = 0 1 1 1 0 1 = = 0 0 0 1 = 0 1 1 1 1 1 1 1 0 0
–   BibiChess 0.52007+16
−16		(−55)14 − 18
(+11−15=6)
43.8%
14.0 / 32
100.0%
−99
  
0 1 0 0 1 1 0 1 = 0 0 1 = 1 0 0 0 1 0 = = 1 1 0 = = 0 0 0 1 1 0
–   IACH 0.56z1995+18
−18		(−67)17 − 15
(+14−12=6)
53.1%
17.0 / 32
100.0%
−42
65.6%
2063
1.09
1354
0 1 1 0 1 1 = 0 1 = 0 1 1 0 1 1 = 0 0 1 0 = = 0 0 1 0 1 1 1 0 =
–   Heracles 0.6.161993+19
−19		(−69)19.5 − 12.5
(+16−9=7)
60.9%
19.5 / 32
100.0%
+9
51.0%
2368
0.94
1208
0 1 0 = 1 1 1 0 = = = = 1 1 1 0 0 1 0 1 0 1 1 0 = = 1 1 0 1 1 1
–   Clueless 1.41990+18
−18		(−72)20.5 − 11.5
(+18−9=5)
64.1%
20.5 / 32
100.0%
+36
48.7%
2335
1.24
1136
= = 1 1 = 1 0 0 0 0 0 1 1 = 1 0 1 0 = 0 1 1 1 1 1 1 1 1 0 1 1 1
–   Warrior 1.0.31987+17
−17		(−75)21.5 − 10.5
(+18−7=7)
67.2%
21.5 / 32
100.0%
+52
50.7%
2231
0.95
1131
0 0 = 1 1 = 0 0 1 1 1 0 1 1 1 1 0 = 1 1 0 1 1 = = 1 1 = 1 1 1 =
–   Morphy 3.221974+17
−17		(−88)22 − 10
(+16−4=12)
68.8%
22.0 / 32
100.0%
+34
54.0%
1327
2.96
716
1 1 = 1 1 = 1 = 1 0 = 0 1 = = = 1 1 = 0 1 0 1 1 = = = 1 1 1 = 1
–   Eagle 0.7.51973+20
−20		(−89)20 − 12
(+18−10=4)
62.5%
20.0 / 32
100.0%
+6
46.7%
2416
1.04
1129
1 1 1 = 1 1 0 = 0 1 0 0 1 1 1 1 1 1 0 = 0 1 1 0 0 1 0 0 1 1 1 =
–   SnailChess 4.0131973+19
−19		(−89)18 − 14
(+13−9=10)
56.3%
18.0 / 32
100.0%
−47
76.0%
1553
2.11
1181
= 1 1 0 = 1 = = 0 = 1 0 = = 0 1 = = 1 1 1 1 1 0 = 0 0 0 1 1 0 1
–   Simontacchi 1.811915+20
−20		(−147)26.5 − 5.5
(+26−5=1)
82.8%
26.5 / 32
100.0%
+159
54.5%
2545
0.89
1387
1 1 1 0 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 0 1
–   Cecir 3.51885+19
−19		(−177)24 − 8
(+21−5=6)
75.0%
24.0 / 32
100.0%
+13
49.8%
2246
0.91
1119
1 = 1 0 1 1 0 1 1 1 1 0 = 1 = 1 1 0 = = 1 1 1 1 1 1 0 1 = 1 1 1
–   Soldat 0.25b1873+17
−17		(−189)19 − 6
(+17−4=4)
76.0%
19.0 / 25
100.0%
+19
47.4%
1714
0.94
813
= 1 1 1 0 1 1 1 1 1 1 = 0 1 = 0 0 1 1 1 1 1 1 = 1
–   Elf 1.3.01820+18
−18		(−242)20 − 7
(+18−5=4)
74.1%
20.0 / 27
100.0%
−52
54.3%
1905
0.84
1034
0 1 1 = 1 1 1 1 1 1 0 0 = = 1 1 1 1 1 1 1 0 1 1 0 = 1
–   Laurifer 1.01815+18
−18		(−247)22 − 10
(+20−8=4)
68.8%
22.0 / 32
100.0%
−98
55.1%
1988
1.00
1096
1 1 0 0 1 1 1 1 1 0 = 0 0 1 0 1 1 1 = = 1 0 1 0 1 = 1 1 1 1 1 1
–   Adamant 1.71790+19
−19		(−272)30.5 − 1.5
(+30−1=1)
95.3%
30.5 / 32
100.0%
+251
55.0%
2039
0.89
1121
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 1 1 1 1
–   Mizar 3.01767+20
−20		(−295)28.5 − 3.5
(+27−2=3)
89.1%
28.5 / 32
100.0%
+64
44.7%
2340
1.64
1047
1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 = 1 1 1 = 1 0 1 1 1 1 = 1
1809 games in total: 675 wins, 786 losses, 348 draws (19.2%), score: 46.9%
Average opponent: +22.9 (2084.9), average distance to opponent: 104.8

Performance

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

Perf = C − 0.130 [±0.139] * 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