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
Betsy 6.51 Nobook WB#77  (2450+15
−15		)Quote
Author: Landon W. Rabern (USA) Released: 2003-04-22Links: Homepage, WBEC
Issues with this engine: Betsy does not count the opening moves when a GUI opening book is used. This leads to incorrect time allocation and time trouble. Therefore Betsy is playing without opening book in this tournament. (Same bug in other engines discussed at Winboard forum). Other than that Betsy 6.51 is also prone to time losses in lost positions. In addition, Betsy 6.51 sometimes fails to checkmate a bare king with king and queen.
This is the only Betsy version we tested.
OpponentEloDiffResultsScoreLOSPerfPond
hit		Eval
diff
–   Matacz 1.3 HT74 5-men-egbb2551+18
−18		(+101)9.5 − 17.5
(+8−16=3)
35.2%
9.5 / 27
0.0%
−15
62.8%
2345
0.59
1472
1 0 0 0 0 1 0 0 = 0 0 0 1 1 0 1 0 1 0 0 1 0 = = 1 0 0
–   SpiderChess 0706032546+17
−17		(+96)12 − 17
(+6−11=12)
41.4%
12.0 / 29
0.0%
+43
58.7%
1620
0.77
951
1 0 = 0 = 1 1 = = = = 0 = = 0 = 0 0 0 0 0 = 1 0 0 1 = = 1
–   Quark 2.352536+16
−16		(+86)10.5 − 17.5
(+7−14=7)
37.5%
10.5 / 28
0.0%
−2
55.9%
1799
0.76
1006
= 1 = 0 0 0 0 1 = 0 = 0 = 0 1 0 0 1 0 0 0 0 1 1 0 = = 1
–   Gaia 3.5 64-bit2536+17
−17		(+86)10.5 − 21.5
(+6−17=9)
32.8%
10.5 / 32
0.0%
−33
58.8%
2275
0.66
1338
0 1 0 1 = 0 0 1 = 0 = 0 = 0 = 0 0 = 0 1 = 0 1 = 0 0 = 0 1 0 0 0
–   King of Kings 2.562536+18
−18		(+86)11.5 − 16.5
(+9−14=5)
41.1%
11.5 / 28
0.0%
+19
54.5%
2182
0.80
1190
1 0 1 0 0 1 0 1 0 0 1 1 = 1 = 0 = 1 0 0 0 = 0 = 0 0 0 1
–   LambChop 10.992531+17
−17		(+81)8 − 17
(+5−14=6)
32.0%
8.0 / 25
0.0%
−45
60.2%
2054
0.60
1236
0 1 0 0 0 0 0 0 0 = 0 1 0 = = 0 1 = 0 = 0 1 1 = 0
–   Dragon 4.62524+16
−16		(+74)12.5 − 16.5
(+9−13=7)
43.1%
12.5 / 29
0.0%
+26
60.8%
2422
0.52
1472
0 0 1 0 = 0 1 1 0 0 0 0 = 0 0 1 1 1 0 1 0 = 1 0 = = = 1 =
–   Nejmet 3.072521+16
−16		(+71)12 − 15
(+8−11=8)
44.4%
12.0 / 27
0.0%
+36
55.8%
2112
0.69
1179
1 = = 1 0 = 1 = 0 1 0 0 1 0 = 0 1 = 0 0 1 0 1 0 = 0 =
–   Snitch 1.6.2 32-bit2521+15
−15		(+71)14.5 − 13.5
(+13−12=3)
51.8%
14.5 / 28
0.0%
+85
55.4%
2577
0.81
1427
0 0 0 1 = 0 0 1 1 0 = 1 1 1 1 0 1 1 1 0 0 = 0 0 0 1 1 1
–   Amy 0.8.7b DC2500+17
−17		(+50)14.5 − 13.5
(+11−10=7)
51.8%
14.5 / 28
0.0%
+60
57.5%
2319
0.84
1334
= 0 0 1 = = 0 1 0 = 1 = 0 = 1 1 = 1 1 0 0 1 0 1 1 0 0 1
–   KnightDreamer 3.32499+16
−16		(+49)17.5 − 14.5
(+14−11=7)
54.7%
17.5 / 32
0.0%
+83
58.6%
2445
0.68
1433
= 1 1 = 1 1 0 1 1 = 0 0 = 0 0 0 1 1 1 = 0 1 0 0 0 1 1 1 1 0 = =
–   Leila 0.53h2490+17
−17		(+40)15.5 − 12.5
(+12−9=7)
55.4%
15.5 / 28
0.0%
+78
57.8%
2309
0.91
1334
= = 0 1 0 1 0 1 0 = 0 1 1 1 = 1 0 1 0 0 1 1 1 = = 0 1 =
–   Diablo 0.5.1 JA2482+16
−16		(+32)16 − 16
(+8−8=16)
50.0%
16.0 / 32
0.2%
+32
60.1%
1601
0.72
962
= = 1 = 1 1 = = 1 0 = = = = = = 0 0 0 1 0 1 0 = 0 = = = 0 = 1 1
–   PostModernist 10162480+16
−16		(+30)14 − 18
(+10−14=8)
43.8%
14.0 / 32
0.3%
−13
61.2%
2329
0.51
1426
= 0 0 0 0 1 1 1 = 1 0 0 0 0 1 0 1 1 = 0 0 = 1 0 = 1 = = 0 1 = 0
–   Djinn 0.925x2479+16
−16		(+29)9.5 − 21.5
(+7−19=5)
30.6%
9.5 / 31
0.4%
−120
58.5%
2431
0.62
1422
1 0 = 0 0 = 0 0 = 0 0 = 0 0 0 0 0 1 1 1 1 0 0 = 0 1 0 1 0 0 0
–   Comet B682478+14
−14		(+28)11 − 18
(+9−16=4)
37.9%
11.0 / 29
0.4%
−63
54.0%
2866
0.81
1548
0 1 0 0 0 0 = 1 0 1 = 1 0 1 0 0 0 1 = 1 0 1 0 0 0 1 0 = 0
–   Sjeng 12.132475+14
−14		(+25)11.5 − 17.5
(+8−14=7)
39.7%
11.5 / 29
0.8%
−47
58.0%
2400
0.92
1393
0 0 1 1 1 0 1 = 1 1 = 0 0 = 0 0 = = = 0 0 1 0 1 0 0 = 0 0
–   Muse 0.899b2474+16
−16		(+24)16 − 13
(+12−9=8)
55.2%
16.0 / 29
1.3%
+61
54.0%
2057
0.88
1111
= 1 1 = 1 1 0 = = 0 1 1 = 0 = 0 1 0 0 0 1 1 = 1 0 1 = 1 0
–   Queen 4.032466+17
−17		(+16)16.5 − 15.5
(+11−10=11)
51.6%
16.5 / 32
8.1%
+28
57.6%
2108
0.71
1214
0 0 1 = 1 1 = 1 0 1 0 0 1 = = 1 = 0 = = 1 1 0 0 = 1 = 1 0 = = 0
–   The Crazy Bishop 00522460+15
−15		(+10)13.5 − 12.5
(+10−9=7)
51.9%
13.5 / 26
17.5%
+22
59.4%
1898
0.56
1128
1 1 0 1 0 1 = 1 = 0 = = 1 0 = 0 = 0 1 1 0 0 = 1 1 0
–   Patzer 3.802460+16
−16		(+10)15 − 17
(+11−13=8)
46.9%
15.0 / 32
18.9%
−14
55.9%
2085
1.16
1165
0 1 0 = 0 1 = = 0 = 0 1 0 = 0 = 1 = = 0 0 1 1 1 0 1 1 1 1 0 0 0
–   Der Bringer 1.92455+15
−15		(+5)13.5 − 16.5
(+9−12=9)
45.0%
13.5 / 30
32.3%
−30
56.2%
2503
0.66
1407
= = = 1 1 1 1 1 0 1 = = = 0 0 = = 0 0 1 = 0 0 1 0 1 0 0 0 0
–   Gosu 0.162455+16
−16		(+5)14.5 − 17.5
(+9−12=11)
45.3%
14.5 / 32
33.3%
−25
53.7%
2613
0.99
1402
0 0 0 1 = = = 0 1 = = 0 1 1 0 0 1 1 = 0 0 0 = = = 1 = 1 = 0 1 0
–   Phalanx XXII Reborn JA2452+15
−15		(+2)11.5 − 17.5
(+9−15=5)
39.7%
11.5 / 29
42.5%
−75
54.5%
2028
0.87
1105
1 = = 1 0 = 0 0 1 0 1 0 0 1 1 0 0 0 = 0 = 0 0 1 0 0 0 1 1
–   Homer 2.012452+17
−17		(+2)18 − 14
(+13−9=10)
56.3%
18.0 / 32
44.7%
+41
54.9%
1951
0.78
1071
1 = 0 0 1 1 = = 1 1 0 0 0 = 1 1 = = 1 0 0 0 1 = 1 0 1 1 1 = = =
–   GNU Chess 5.07.9b 64-bit JA2448+16
−16		(−2)15 − 17
(+12−14=6)
46.9%
15.0 / 32
57.6%
−26
55.6%
3003
0.74
1670
1 0 0 1 0 1 1 0 = = 0 1 = 1 1 1 1 0 0 1 = 0 = 0 = 1 0 1 0 0 0 0
–   Amateur 2.822446+15
−15		(−4)14 − 11
(+12−9=4)
56.0%
14.0 / 25
65.3%
+42
54.8%
2147
1.15
1177
1 0 0 1 = 1 1 1 = 0 1 = = 0 0 0 1 0 1 0 1 1 0 1 1
–   Tytan 9.32 64-bit2429+17
−17		(−21)19 − 13
(+15−9=8)
59.4%
19.0 / 32
97.4%
+46
  
0 1 0 0 = 1 1 0 0 = 1 1 = = = = 0 0 1 1 1 = 1 1 1 0 1 1 0 1 1 =
–   Sage 3.532424+19
−19		(−26)16 − 16
(+13−13=6)
50.0%
16.0 / 32
98.6%
−24
53.7%
2285
0.99
1226
= 0 0 1 1 1 = 0 = = 0 1 1 1 0 1 1 0 1 1 0 = 0 0 0 = 0 1 1 0 1 0
–   Sorgenkind 0.42421+18
−18		(−29)13 − 19
(+8−14=10)
40.6%
13.0 / 32
99.4%
−91
54.4%
2600
1.01
1415
0 = 0 = 1 = 1 = 1 0 1 0 = 0 0 0 0 0 = 1 = 1 1 0 0 0 1 = = = 0 0
–   Horizon 4.42419+18
−18		(−31)20 − 12
(+16−8=8)
62.5%
20.0 / 32
99.7%
+55
51.2%
2263
1.15
1158
0 = 0 0 1 1 = 1 1 1 1 1 = 1 = 0 0 0 1 = 0 1 1 1 1 1 0 = 1 = 1 =
–   Thor's Hammer 2.28 32-bit2417+15
−15		(−33)14 − 14
(+12−12=4)
50.0%
14.0 / 28
99.9%
−32
56.1%
2064
0.92
1157
1 0 = 1 = 0 1 1 1 = 0 0 0 1 = 0 1 0 0 0 1 0 0 1 1 0 1 1
–   Arion 1.72415+16
−16		(−35)11 − 18
(+5−12=12)
37.9%
11.0 / 29
100.0%
−110
64.1%
1927
0.56
1236
0 = 0 0 0 = = = = 0 0 = 0 0 = = 0 = 0 0 0 1 1 = 1 = = 1 1
–   AICE 0.99.22411+16
−16		(−39)14.5 − 17.5
(+11−14=7)
45.3%
14.5 / 32
100.0%
−72
58.1%
2303
0.70
1339
1 1 1 0 0 = = 0 1 1 0 0 1 1 0 1 0 = 0 = 1 0 = 0 1 0 = = 0 0 1 0
–   Chezzz 1.0.32409+15
−15		(−41)16.5 − 11.5
(+11−6=11)
58.9%
16.5 / 28
100.0%
+17
55.0%
1681
0.73
924
1 1 0 = 1 1 0 = 0 = 0 = = = 1 = = = 1 0 = 0 1 = 1 1 1 1
–   Asterisk 0.62402+17
−17		(−48)17.5 − 14.5
(+14−11=7)
54.7%
17.5 / 32
100.0%
−13
58.9%
2721
0.55
1604
0 1 0 0 0 0 1 0 = = 1 1 1 1 = 1 = 1 1 1 1 1 0 0 = 1 0 = 0 = 1 0
–   Averno 0.812396+15
−15		(−54)20 − 9
(+16−5=8)
69.0%
20.0 / 29
100.0%
+78
54.1%
1957
0.75
1059
1 = = 1 1 = = 0 0 1 0 = 1 1 1 1 1 1 1 0 = 0 1 1 1 = 1 1 =
–   Scidlet 3.61 64-bit JA2390+15
−15		(−60)13.5 − 8.5
(+11−6=5)
61.4%
13.5 / 22
100.0%
+19
58.8%
1678
0.72
987
0 0 0 = 1 0 0 = = 1 1 1 0 1 1 1 1 = = 1 1 1
–   KnightX 1.922385+15
−15		(−65)14 − 15
(+11−12=6)
48.3%
14.0 / 29
100.0%
−76
56.5%
2163
0.72
1222
0 = 0 1 0 0 0 0 0 1 = 1 0 = = = = 1 1 1 1 1 0 0 1 0 1 0 1
–   Eeyore 1.482384+15
−15		(−66)21.5 − 7.5
(+18−4=7)
74.1%
21.5 / 29
100.0%
+108
58.4%
2126
1.01
1242
1 1 1 1 = = = 0 1 0 1 1 1 = 1 = 1 1 1 1 1 = = 0 1 1 1 1 0
–   Ayito 0.2.9942371+16
−16		(−79)19 − 9
(+17−7=4)
67.9%
19.0 / 28
100.0%
+60
57.3%
2343
0.70
1342
1 0 1 1 1 1 0 1 1 1 1 0 = = = 1 1 1 0 1 = 0 1 0 1 1 1 0
–   Matilde 2008 64-bit2368+15
−15		(−82)23 − 9
(+17−3=12)
71.9%
23.0 / 32
100.0%
+61
58.1%
2062
0.87
1199
= 1 = 1 0 1 1 = 1 1 1 = 0 1 = 1 = 1 1 = 1 = = 1 = = 1 = 1 1 0 1
–   Natwarlal 0.142359+17
−17		(−91)14.5 − 17.5
(+10−13=9)
45.3%
14.5 / 32
100.0%
−122
56.6%
2583
0.62
1463
= 0 0 0 1 1 0 = = 1 = 1 0 1 1 0 = = 1 0 1 0 1 0 = = = 0 0 0 0 1
–   EXchess 5.01 beta 64-bit JA2355+14
−14		(−95)20.5 − 9.5
(+17−6=7)
68.3%
20.5 / 30
100.0%
+38
59.8%
2502
0.62
1496
1 1 = 0 1 0 1 = 1 1 1 1 1 = 1 = 1 1 1 0 1 = 1 = 0 1 1 = 0 0
–   Zeus 1.292346+16
−16		(−104)21.5 − 10.5
(+17−6=9)
67.2%
21.5 / 32
100.0%
+16
57.2%
2226
0.75
1274
= 0 = 1 1 0 = 0 1 = 0 1 1 = 0 1 1 1 0 = 1 1 1 1 1 1 = 1 1 = 1 =
–   Esc 1.162345+15
−15		(−105)17.5 − 10.5
(+13−6=9)
62.5%
17.5 / 28
100.0%
−20
57.3%
1709
0.74
980
= 1 0 1 1 1 = 1 1 1 1 1 1 0 0 = = 0 = = = = 0 1 1 = 0 1
–   ANT 2006-F2333+16
−16		(−117)17.5 − 10.5
(+15−8=5)
62.5%
17.5 / 28
100.0%
−20
53.7%
2121
0.83
1140
1 = 1 1 1 0 1 = 0 1 1 0 1 = 1 0 = 1 = 0 1 1 1 0 0 0 1 1
–   Anechka 0.082320+16
−16		(−130)23 − 9
(+20−6=6)
71.9%
23.0 / 32
100.0%
+35
58.5%
2557
0.94
1496
0 1 0 1 1 1 1 1 = 1 1 1 1 1 0 = 1 1 1 1 0 = 1 1 1 0 = 1 1 0 = =
–   Dorky 3.482308+16
−16		(−142)22.5 − 5.5
(+20−3=5)
80.4%
22.5 / 28
100.0%
+96
59.8%
2066
0.93
1235
1 1 1 = 1 = 0 1 1 1 1 = 1 1 = 0 1 1 1 1 1 = 1 1 1 1 0 1
–   CyberPagno 2.1 32MB2295+16
−16		(−155)18 − 8
(+15−5=6)
69.2%
18.0 / 26
100.0%
−12
57.6%
1881
0.89
1084
= = 1 1 0 0 0 1 = 0 0 1 1 = = 1 1 1 1 1 1 1 = 1 1 1
–   Latista (Sinobyl) 1.52289+16
−16		(−161)21 − 8
(+19−6=4)
72.4%
21.0 / 29
100.0%
+14
61.1%
2486
0.89
1518
0 0 1 1 1 0 1 1 1 1 1 = = 1 1 1 0 = 1 1 1 1 0 = 1 1 1 0 1
–   Madeleine 0.22285+15
−15		(−165)21.5 − 9.5
(+17−5=9)
69.4%
21.5 / 31
100.0%
−29
56.8%
2341
1.12
1330
1 1 1 1 = 1 0 0 1 1 0 1 1 = 1 1 1 = = 1 = 0 1 = 0 1 1 = = = 1
–   Chispa 4.0.32273+14
−14		(−177)23.5 − 7.5
(+16−0=15)
75.8%
23.5 / 31
100.0%
−20
58.7%
1488
0.84
873
= = 1 1 = 1 1 = = = = = 1 = 1 1 1 1 1 1 1 = 1 1 = = = = 1 1 =
–   InmiChess 3.06N2241+15
−15		(−209)21 − 8
(+18−5=6)
72.4%
21.0 / 29
100.0%
−42
53.5%
1782
0.89
954
1 1 1 1 1 1 0 1 1 = 0 = 1 = 1 0 = 1 1 1 0 0 = 1 1 = 1 1 1
–   Nesik 0.7.0 alpha2237+16
−16		(−213)25.5 − 3.5
(+23−1=5)
87.9%
25.5 / 29
100.0%
+101
57.9%
2370
0.70
1373
1 1 1 1 1 1 1 1 1 1 1 1 1 = = 1 1 1 1 1 1 = 1 1 = = 0 1 1
–   Fortress 1.622216+15
−15		(−234)17 − 10
(+14−7=6)
63.0%
17.0 / 27
100.0%
−139
54.1%
2307
1.04
1247
1 = 0 = 0 = 1 1 0 0 1 = 0 0 1 1 0 1 1 = 1 = 1 1 1 1 1
1651 games in total: 687 wins, 548 losses, 416 draws (25.2%), score: 54.2%
Average opponent: −30.5 (2419.5), average distance to opponent: 69.1

Performance

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

Perf = C + 0.067 [±0.184] * 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