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
Zappa 1.1 64-bit UCI#15  (2717+19
−19		)Quote
Author: Anthony Cozzie (USA) Released: 2005-08-26Link: Homepage
This engine is stable and runs without issues.
This is the only Zappa version we tested.
OpponentEloDiffResultsScoreLOSPerfPond
hit		Eval
diff
–   Fruit 2.3 32-bit2888+23
−23		(+171)9.5 − 19.5
(+5−15=9)
32.8%
9.5 / 29
0.0%
+54
57.4%
1902
0.52
1092
0 0 = 0 0 0 1 0 = = = 0 1 = 0 1 0 1 0 0 0 = = 1 = 0 0 0 =
–   Spike 1.2 Turin2842+23
−23		(+125)14 − 18
(+7−11=14)
43.8%
14.0 / 32
0.0%
+86
55.8%
1983
0.69
1107
= = 0 0 = = = 0 = = = = 1 1 0 0 0 1 0 = 1 = = 0 1 1 0 0 = 1 0 =
–   Glaurung 2.0.1 64-bit2838+23
−23		(+121)8.5 − 19.5
(+3−14=11)
30.4%
8.5 / 28
0.0%
−4
59.8%
1462
0.76
875
= 0 0 0 0 = 0 0 = 0 0 = 1 = 0 0 0 = 0 = 1 = = = = 0 0 1
–   Frenzee Feb08 64-bit2810+24
−24		(+93)11 − 21
(+8−18=6)
34.4%
11.0 / 32
0.0%
−24
56.8%
2510
1.17
1426
0 1 1 0 0 0 1 = 0 0 1 0 1 0 = 0 0 0 1 0 = 1 = = 0 0 = 0 0 0 1 0
–   Delfi 5.42801+24
−24		(+84)11 − 21
(+6−16=10)
34.4%
11.0 / 32
0.0%
−22
61.2%
2076
0.53
1270
0 = 1 0 0 = 0 0 0 1 = = = 0 0 0 0 0 = 1 0 = 0 0 0 0 1 = = = 1 1
–   Naum 2.0 64-bit2793+21
−21		(+76)11 − 21
(+5−15=12)
34.4%
11.0 / 32
0.0%
−25
58.7%
2020
0.64
1186
= 0 0 0 0 0 1 1 1 0 = 0 = = 0 = = 1 = 0 0 = 0 = 0 = 0 0 0 = 1 =
–   Bright 0.2c2786+23
−23		(+69)8 − 21
(+4−17=8)
27.6%
8.0 / 29
0.0%
−87
61.9%
2191
0.61
1357
1 0 = 0 0 0 1 0 0 1 0 0 = = = 1 = 0 0 0 0 = 0 0 = 0 0 = 0
–   Naum 2.0 32-bit2777+26
−26		(+60)11.5 − 19.5
(+6−14=11)
37.1%
11.5 / 31
0.0%
−25
55.2%
1780
0.58
983
1 0 = 0 = = = 0 1 = = 0 0 0 = = 1 1 0 0 1 0 0 = 0 = 0 1 0 = 0
–   Glaurung 1.2.1 64-bit2770+24
−24		(+53)12 − 20
(+6−14=12)
37.5%
12.0 / 32
0.0%
−27
55.3%
2207
0.67
1221
= 0 0 = 0 1 = 0 0 0 = 1 0 1 = 0 1 = 0 = 1 = 0 = 0 0 = = = 0 1 0
–   Alaric 7072768+22
−22		(+51)10.5 − 15.5
(+7−12=7)
40.4%
10.5 / 26
0.0%
−18
60.0%
1764
0.61
1059
= 1 1 1 0 0 0 0 0 = 1 0 = 0 0 1 = = = 0 1 0 0 0 1 =
–   Scorpio 2.0 32-bit2754+23
−23		(+37)10.5 − 13.5
(+7−10=7)
43.8%
10.5 / 24
0.3%
−9
53.9%
1722
0.81
929
= 0 0 0 = 0 0 1 1 1 = 1 0 = = = 0 1 = 0 0 1 0 1
–   Scorpio 1.912739+26
−26		(+22)13 − 15
(+8−10=10)
46.4%
13.0 / 28
7.1%
−2
61.6%
1801
0.74
1109
= 1 = = 1 1 1 = 0 1 1 = 0 1 0 = 0 0 0 1 0 0 = = 0 0 = =
–   E.T. Chess 13.01.082733+21
−21		(+16)11 − 15
(+7−11=8)
42.3%
11.0 / 26
11.8%
−36
56.8%
2037
0.69
1157
= = 0 1 0 = 0 = 0 = 0 0 1 1 1 1 0 0 1 = 1 0 = = 0 0
–   WildCat 82730+22
−22		(+13)16 − 16
(+7−7=18)
50.0%
16.0 / 32
16.9%
+13
58.4%
1508
0.65
880
= = 0 = = = 1 1 1 0 = = = = 0 1 = 0 = = 1 = = = 0 1 = = = 1 0 0
–   Alfil 8.1.1 Optimized2723+21
−21		(+6)10.5 − 15.5
(+7−12=7)
40.4%
10.5 / 26
33.1%
−63
59.1%
1933
0.70
1142
0 = 1 1 0 = 0 = 0 1 0 0 1 = 0 1 = 0 1 0 0 = 1 = 0 0
–   Movei 00.8.438 (10-10-10)2722+21
−21		(+5)10.5 − 12.5
(+7−9=7)
45.7%
10.5 / 23
36.7%
−24
61.3%
1521
0.61
933
1 0 = 1 0 = 1 0 0 0 = 0 0 = 1 0 = = 0 1 = 1 1
–   Pro Deo 1.62719+22
−22		(+2)11 − 12
(+6−7=10)
47.8%
11.0 / 23
46.7%
−9
57.0%
1317
0.77
751
1 = 0 1 0 1 = = 0 = 0 = 1 = = = 0 0 1 0 = = 1
–   Delfi 5.22718+21
−21		(+1)13.5 − 11.5
(+9−7=9)
54.0%
13.5 / 25
47.5%
+25
56.6%
1672
0.62
947
0 0 1 = 0 1 0 = = 1 0 = = 1 1 0 = = = 1 = 1 1 0 1
–   WildCat 72718+19
−19		(+1)13.5 − 17.5
(+10−14=7)
43.5%
13.5 / 31
48.3%
−44
55.9%
2404
0.66
1343
0 0 1 0 0 = 0 1 = 1 1 = 0 0 1 = 0 0 1 = 0 0 0 0 1 = = 0 1 1 1
–   Slow Chess Blitz WV2.12716+19
−19		(−1)14.5 − 17.5
(+7−10=15)
45.3%
14.5 / 32
56.2%
−28
58.8%
1593
0.66
936
= 1 = 0 = 0 0 0 = = 1 = = 1 0 1 = 1 1 = 1 = = = 0 = 0 = 0 0 = 0
–   Alaric 7042713+26
−26		(−4)16 − 13
(+11−8=10)
55.2%
16.0 / 29
63.1%
+32
58.8%
1740
0.79
1023
0 1 1 1 = 0 0 = 0 1 1 = 1 = 0 1 1 1 1 0 = = = = 0 = 0 1 =
–   Frenzee 3.0 64-bit2711+19
−19		(−6)14 − 12
(+10−8=8)
53.8%
14.0 / 26
70.9%
+22
53.5%
1542
0.75
825
0 0 1 0 = 1 1 = = 1 = = 1 = 0 0 0 0 0 = 1 1 1 1 = 1
–   Colossus 2007d2707+20
−20		(−10)12 − 12
(+9−9=6)
50.0%
12.0 / 24
80.0%
−4
57.4%
2011
0.64
1155
1 = 1 0 1 0 0 1 = 0 0 1 = 1 1 = 0 1 0 0 = 1 = 0
–   Pharaon 3.5.12704+19
−19		(−13)20.5 − 11.5
(+14−5=13)
64.1%
20.5 / 32
87.5%
+74
60.5%
1750
0.87
1059
= 1 1 1 1 0 1 0 = 1 = = = 0 = 1 = 1 = 1 1 = 1 = 0 = = 1 1 0 1 =
–   List 5.122699+18
−18		(−18)16.5 − 15.5
(+11−10=11)
51.6%
16.5 / 32
95.0%
−7
53.1%
2020
0.84
1073
= = 1 = 1 0 1 1 = 0 1 0 1 0 1 = 0 1 = 1 = 0 0 = = 0 0 = 1 = 0 1
–   SOS 5.12697+18
−18		(−20)12.5 − 19.5
(+8−15=9)
39.1%
12.5 / 32
96.4%
−96
60.1%
2233
0.64
1342
= 1 1 0 0 = 0 = 0 0 1 0 = 0 = 0 0 = 1 0 1 1 1 = 0 0 0 0 1 = = 0
–   Colossus 2007c2694+19
−19		(−23)13.5 − 15.5
(+7−9=13)
46.6%
13.5 / 29
97.6%
−44
55.9%
1853
0.66
1035
= 0 0 = 0 0 1 1 0 0 = = 1 = 1 = 1 = 1 = = = 1 = 0 = 0 0 =
–   Ruffian 1.0.52687+17
−17		(−30)19 − 13
(+14−8=10)
59.4%
19.0 / 32
99.6%
+31
59.1%
2247
0.69
1327
= 1 = 0 = 0 = 0 = 1 1 0 0 = 0 1 1 1 1 0 1 = 0 1 1 1 1 1 = 1 = =
–   Petir 4.392682+18
−18		(−35)15.5 − 11.5
(+10−6=11)
57.4%
15.5 / 27
99.9%
+9
59.3%
1570
0.79
931
0 1 = = = 0 1 = 1 1 0 0 = 1 0 1 = = 0 1 1 1 1 = = = =
–   Pseudo 0.7c2680+18
−18		(−37)21 − 11
(+15−5=12)
65.6%
21.0 / 32
99.9%
+64
58.6%
1780
0.68
1043
1 = 0 = = = 1 1 = 1 = 1 1 0 1 = 1 1 0 1 = = 1 = 1 0 = 1 1 = 1 0
–   Aristarch 4.502671+18
−18		(−46)18.5 − 13.5
(+14−9=9)
57.8%
18.5 / 32
100.0%
+6
55.9%
1698
0.67
950
0 0 = 1 = 1 = = = 0 1 0 1 1 0 1 1 1 0 1 1 = 1 1 = 1 0 1 = = 0 0
–   Petir 4.9999992670+19
−19		(−47)11.5 − 7.5
(+8−4=7)		60.5%
11.5 / 19
100.0%
+20
58.2%
1372
0.84
799
0 0 0 = 1 1 1 = = 1 1 = = 0 1 = = 1 1
–   Hamsters 0.62669+18
−18		(−48)15 − 12
(+9−6=12)
55.6%
15.0 / 27
100.0%
−11
55.7%
1436
0.94
800
1 1 0 = = 1 0 = = 1 1 = 0 = = = = = 1 = 1 0 0 = 1 1 0
–   The Baron 2.23 64-bit2669+19
−19		(−48)19.5 − 12.5
(+14−7=11)
60.9%
19.5 / 32
100.0%
+22
59.3%
1911
0.63
1134
1 1 0 0 1 0 0 1 = = 1 = = 0 1 1 = 1 = 0 1 = = = 1 0 = 1 1 1 = 1
–   Booot 4.13.12668+18
−18		(−49)15 − 9
(+11−5=8)
62.5%
15.0 / 24
100.0%
+31
58.0%
1723
0.68
1000
1 1 1 0 0 1 1 = 0 0 = 0 1 = 1 1 1 = = = = 1 = 1
–   BugChess2 1.5.22661+18
−18		(−56)13.5 − 9.5
(+11−7=5)
58.7%
13.5 / 23
100.0%
+10
53.9%
2206
0.82
1190
= 1 1 1 1 1 1 0 0 = 0 1 1 0 0 = = 1 = 0 0 1 1
–   Jonny 2.832652+17
−17		(−65)22.5 − 9.5
(+18−5=9)
70.3%
22.5 / 32
100.0%
+77
55.7%
1890
0.72
1053
1 = 1 = = 1 1 = 0 1 1 0 = 1 = 1 1 1 = 1 1 = 1 1 = 1 0 1 1 0 0 1
–   Crafty 21.5 64-bit PS2652+17
−17		(−65)19.5 − 8.5
(+15−4=9)
69.6%
19.5 / 28
100.0%
+67
58.5%
2227
0.83
1302
1 1 1 1 = 1 = = 1 1 = 0 1 1 = 1 = 0 = 1 = 1 0 1 0 1 1 =
–   The Baron 1.8.12651+18
−18		(−66)18 − 10
(+12−4=12)
64.3%
18.0 / 28
100.0%
+27
57.8%
1496
0.82
865
= 1 0 = 1 = 1 = 1 1 1 = 1 = 1 = 1 = 0 = = 0 1 1 = 1 = 0
–   Anaconda 2.0.12644+17
−17		(−73)14 − 8
(+11−5=6)
63.6%
14.0 / 22
100.0%
+25
60.7%
1350
0.63
819
0 = = 1 1 0 1 = 1 0 1 = 1 1 0 1 1 = 1 0 1 =
–   Fritz 5.322643+17
−17		(−74)14 − 9
(+10−5=8)
60.9%
14.0 / 23
100.0%
−3
60.0%
1351
0.78
810
= 1 1 1 1 = 1 = = 1 = 1 0 = 1 1 1 0 0 0 = 0 =
–   SmarThink 0.17a2633+16
−16		(−84)16 − 16
(+14−14=4)
50.0%
16.0 / 32
100.0%
−82
55.7%
2418
0.73
1348
0 0 = 1 0 1 0 1 0 1 = = 0 1 1 0 0 0 1 0 0 0 1 1 1 0 1 1 1 0 = 1
1190 games in total: 388 wins, 401 losses, 401 draws (33.7%), score: 49.5%
Average opponent: +3.9 (2720.9), average distance to opponent: 46.5

Performance

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

Perf = C − 0.061 [±0.220] * 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