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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Petir 4.999999 WB (2670+19
−19		)Quote
Author: Peter Alloysius (Indonesia) Released: 2007-09-15Link: Homepage
This engine is stable and runs without issues.
This is one of the 2 Petir versions we tested: Compare them!
OpponentEloDiffResultsScoreLOSPerfPond
hit		Eval
diff
–   Scorpio 2.0 32-bit2754+23
−23		(+84)6 − 18
(+2−14=8)
25.0%
6.0 / 24
0.0%
−82
60.5%
1525
1.27
923
0 0 0 0 0 1 = = 0 = = 0 = 0 0 = 0 1 0 0 0 = = 0
–   E.T. Chess 13.01.082733+21
−21		(+63)10 − 17
(+5−12=10)
37.0%
10.0 / 27
0.0%
−18
59.7%
1677
0.79
1002
0 = = 0 = = 0 1 0 = = 0 0 = 0 = 0 1 1 1 = 0 0 0 0 1 =
–   WildCat 82730+22
−22		(+60)15 − 17
(+10−12=10)
46.9%
15.0 / 32
0.0%
+39
58.2%
2007
0.78
1169
0 = 1 = 0 0 0 1 1 1 = = = 1 0 = 0 1 0 1 1 0 = = = 0 0 0 = 1 0 1
–   Alfil 8.1.1 Optimized2723+21
−21		(+53)15 − 12
(+10−7=10)
55.6%
15.0 / 27
0.0%
+91
58.8%
1574
0.64
925
0 1 0 0 = 1 = = 0 = 1 1 1 = = = 1 = 0 1 0 1 0 1 = = 1
–   Movei 00.8.438 (10-10-10)2722+21
−21		(+52)16 − 13
(+8−5=16)
55.2%
16.0 / 29
0.0%
+79
57.9%
1239
0.58
717
= 0 = 1 1 = = 1 0 = 0 = 0 = = 1 0 = = = 1 = = 1 = = 1 1 =
–   Pro Deo 1.62719+22
−22		(+49)6 − 15
(+2−11=8)
28.6%
6.0 / 21
0.0%
−88
59.9%
908
0.58
544
1 0 0 = = 0 0 0 0 = = = = 0 = 1 = 0 0 0 0
–   Delfi 5.22718+21
−21		(+48)11.5 − 14.5
(+7−10=9)
44.2%
11.5 / 26
0.0%
+7
62.5%
1750
0.54
1094
0 0 0 = 1 1 = = = 1 1 = 0 0 1 = 0 0 0 0 = 1 = 0 = 1
–   WildCat 72718+19
−19		(+48)10 − 13
(+8−11=4)
43.5%
10.0 / 23
0.0%
+1
58.4%
1671
0.62
976
1 0 1 1 0 0 1 0 1 = 1 0 = = 0 1 0 0 = 0 0 1 0
–   Zappa 1.1 64-bit2717+19
−19		(+47)7.5 − 11.5
(+4−8=7)		39.5%
7.5 / 19
0.0%
−20
58.2%
1372
0.84
799
1 1 1 = 0 0 0 = = 0 0 = = 1 0 = = 0 0
–   Slow Chess Blitz WV2.12716+19
−19		(+46)4 − 20
(+1−17=6)
16.7%
4.0 / 24
0.0%
−203
63.0%
1701
0.76
1071
= 0 0 0 = 0 0 0 = = 0 0 = 0 0 1 0 = 0 0 0 0 0 0
–   Frenzee 3.0 64-bit2711+19
−19		(+41)8 − 14
(+5−11=6)
36.4%
8.0 / 22
0.0%
−60
57.8%
1997
0.83
1154
= 0 1 1 0 0 0 0 = = = = 1 0 1 1 = 0 0 0 0 0
–   Colossus 2007d2707+20
−20		(+37)9 − 17
(+4−12=10)
34.6%
9.0 / 26
0.1%
−59
58.2%
1599
0.74
931
= 0 0 0 0 = 0 = 1 0 = 0 0 = = = = 0 = 0 0 = 1 1 0 1
–   Pharaon 3.5.12704+19
−19		(+34)10.5 − 11.5
(+7−8=7)
47.7%
10.5 / 22
0.2%
+15
60.8%
1553
0.65
944
= 1 = = 0 1 1 0 1 0 0 0 = 1 = 0 0 = 1 = 0 1
–   List 5.122699+18
−18		(+29)12 − 11
(+8−7=8)
52.2%
12.0 / 23
0.7%
+42
62.0%
1270
0.78
788
= 0 1 1 = 1 0 = 1 0 = 1 1 = = = 0 = 0 1 0 1 0
–   SOS 5.12697+18
−18		(+27)14 − 12
(+9−7=10)
53.8%
14.0 / 26
1.1%
+46
58.6%
1534
0.73
899
1 0 0 1 1 = 1 1 1 = 0 1 = 1 0 = = = 1 0 = = = = 0 0
–   Colossus 2007c2694+19
−19		(+24)17.5 − 10.5
(+11−4=13)
62.5%
17.5 / 28
2.3%
+100
63.3%
1418
0.55
898
= = = = 1 0 1 1 = 1 = = = = = = = 1 = 1 1 0 1 0 0 1 1 1
–   Ruffian 1.0.52687+17
−17		(+17)8.5 − 14.5
(+6−12=5)
37.0%
8.5 / 23
6.2%
−78
62.9%
1745
0.76
1098
0 = 1 0 0 0 0 0 1 = 0 0 1 0 0 0 = 1 = = 1 1 0
–   Petir 4.392682+18
−18		(+12)16.5 − 15.5
(+12−11=9)
51.6%
16.5 / 32
15.6%
+22
70.8%
2208
0.30
1563
1 1 0 = 0 = 0 0 = 0 0 = 0 = = 0 1 1 1 1 = 0 1 = 1 0 1 1 1 1 = 0
–   Pseudo 0.7c2680+18
−18		(+10)10 − 11
(+6−7=8)
47.6%
10.0 / 21
18.8%
−7
63.7%
1743
0.45
1110
1 1 = = = 0 1 0 1 = 0 = 0 1 0 0 0 = = 1 =
–   Aristarch 4.502671+18
−18		(+1)11.5 − 15.5
(+6−10=11)
42.6%
11.5 / 27
45.0%
−44
59.4%
1053
0.83
625
0 1 0 0 0 1 = = 1 = = = = 1 1 = 0 0 0 1 = = 0 0 = = 0
–   Hamsters 0.62669+18
−18		(−1)14.5 − 13.5
(+8−7=13)
51.8%
14.5 / 28
51.0%
+12
62.9%
1557
0.56
979
= = 1 1 0 = 1 = 0 1 = = 1 = = 0 = 1 1 1 0 = = = 0 0 0 =
–   The Baron 2.23 64-bit2669+19
−19		(−1)11.5 − 20.5
(+8−17=7)
35.9%
11.5 / 32
50.7%
−103
57.2%
2339
0.97
1338
1 = 0 0 0 0 1 1 1 1 = 0 = 1 0 = 0 0 1 = 0 0 = 0 0 0 = 0 0 0 1 0
–   Booot 4.13.12668+18
−18		(−2)15 − 13
(+10−8=10)
53.6%
15.0 / 28
56.2%
+22
61.5%
1939
0.52
1192
1 0 0 1 0 1 = 1 1 = 0 0 = = 1 = 0 = = 1 = 0 = 1 0 1 1 =
–   BugChess2 1.5.22661+18
−18		(−9)10.5 − 7.5
(+8−5=5)		58.3%
10.5 / 18
76.5%
+43
51.6%
1757
0.83
906
= 1 1 0 = 0 0 = 1 0 = 1 = 1 1 0 1 1
–   Jonny 2.832652+17
−17		(−18)7.5 − 16.5
(+4−13=7)
31.3%
7.5 / 24
93.9%
−147
57.8%
1468
0.71
849
0 = 0 1 0 = 0 0 = 0 1 0 0 1 0 1 0 = = = = 0 0 0
–   Crafty 21.5 64-bit PS2652+17
−17		(−18)16.5 − 11.5
(+12−7=9)
58.9%
16.5 / 28
93.1%
+40
62.6%
1526
0.62
956
= 0 1 0 = = 0 1 = 0 1 1 = 1 0 1 = = 1 1 1 = 1 1 1 0 = 0
–   The Baron 1.8.12651+18
−18		(−19)14.5 − 9.5
(+13−8=3)
60.4%
14.5 / 24
94.1%
+63
53.5%
1755
0.85
939
1 1 0 0 0 1 1 1 0 0 0 1 1 1 1 1 1 = 1 = 0 1 = 0
–   Anaconda 2.0.12644+17
−17		(−26)15 − 9
(+9−3=12)
62.5%
15.0 / 24
98.5%
+46
63.0%
1315
0.67
829
1 1 0 = 0 1 1 = = = = = 1 = 1 = 1 = = 0 = 1 1 =
–   Fritz 5.322643+17
−17		(−27)14 − 14
(+9−9=10)
50.0%
14.0 / 28
98.8%
−29
65.2%
1603
0.61
1045
1 = 0 = = = 1 0 = 1 1 1 = 0 = 0 0 = 0 1 0 0 = 1 1 = 0 1
–   Ktulu 4.22634+17
−17		(−36)16 − 9
(+13−6=6)
64.0%
16.0 / 25
99.9%
+62
59.6%
1830
0.73
1090
= 1 = 1 0 1 1 = 1 0 1 0 1 0 = 0 = 0 1 = 1 1 1 1 1
–   Thinker 4.7a2634+17
−17		(−36)14.5 − 11.5
(+8−5=13)
55.8%
14.5 / 26
99.9%
−3
58.2%
1158
0.51
674
= 1 = = 1 0 = 0 1 1 = 1 = 1 = 0 0 = = = = 1 0 1 = =
–   SmarThink 0.17a2633+16
−16		(−37)16 − 12
(+11−7=10)
57.1%
16.0 / 28
99.9%
+12
58.5%
1566
0.58
916
1 = 1 = 1 1 1 0 = = 1 = 1 1 = = 0 1 0 0 = 0 = 0 1 0 1 =
–   Ufim 8.022628+18
−18		(−42)10 − 15
(+6−11=8)
40.0%
10.0 / 25
100.0%
−108
56.1%
1884
0.87
1056
= = 0 0 0 0 0 0 = = 1 0 1 = 1 1 = 1 = 1 0 = 0 0 0
–   Fritz 6 Light2627+19
−19		(−43)11 − 11
(+7−7=8)
50.0%
11.0 / 22
100.0%
−44
62.0%
1212
0.51
752
= 1 0 1 1 0 0 1 = 0 = = 1 1 0 = = 1 0 0 = =
–   Trace 1.37a2622+17
−17		(−48)10 − 11
(+5−6=10)
47.6%
10.0 / 21
100.0%
−64
59.1%
977
0.97
577
= 1 = = 0 = 0 = = 1 0 0 1 0 1 = 1 = = 0 =
–   AnMon 5.602621+18
−18		(−49)15 − 13
(+11−9=8)
53.6%
15.0 / 28
100.0%
−28
58.3%
2124
0.56
1238
0 1 = 0 0 1 1 1 1 0 1 0 1 1 = 0 0 = 1 = = = 0 = 1 1 0 =
–   E.T. Chess 18.11.052620+21
−21		(−50)18 − 9
(+13−4=10)
66.7%
18.0 / 27
100.0%
+57
55.9%
1829
0.52
1023
1 1 0 = 1 = = 1 0 1 1 = 0 = 1 = 1 1 0 1 = 1 1 = = = 1
–   Little Goliath 3.12 Evolution (TB Off)2614+17
−17		(−56)18 − 8
(+16−6=4)
69.2%
18.0 / 26
100.0%
+90
54.2%
2161
0.76
1171
1 1 1 1 1 1 1 0 = 0 1 1 1 = = 0 = 1 0 1 1 1 0 0 1 1
–   Yace 0.99.872609+17
−17		(−61)12.5 − 13.5
(+6−7=13)
48.1%
12.5 / 26
100.0%
−72
61.0%
1068
0.52
651
1 0 1 1 0 1 = = = = 0 0 0 = = = = 1 0 = 0 = = 1 = =
–   Little Goliath 3.12 Evolution (TB On)2607+19
−19		(−63)15 − 9
(+12−6=6)
62.5%
15.0 / 24
100.0%
+26
55.9%
1810
0.97
1012
1 0 1 1 1 = 1 0 1 1 1 0 0 0 1 1 = = = 1 = = 1 0
–   Pepito 1.59 32-bit2595+19
−19		(−75)16.5 − 9.5
(+13−6=7)
63.5%
16.5 / 26
100.0%
+19
61.9%
1726
0.48
1068
1 = 1 1 1 1 1 0 1 1 = 0 1 = 0 = 1 = = 0 1 0 = 1 0 1
–   Bruja 1.9 64-bit JA No-int-book2584+18
−18		(−86)18 − 7
(+14−3=8)
72.0%
18.0 / 25
100.0%
+66
58.6%
1585
0.62
929
1 1 = 1 0 1 = = 0 = 1 = 0 = 1 1 1 = 1 1 1 1 1 1 =
–   Green Light Chess 3.002582+17
−17		(−88)19.5 − 7.5
(+16−4=7)
72.2%
19.5 / 27
100.0%
+68
57.0%
2437
0.47
1389
= 0 1 1 1 1 1 = 0 1 = 1 1 1 0 1 = 1 1 1 0 1 = = = 1 1
–   Tao 5.62574+17
−17		(−96)21 − 6
(+19−4=4)
77.8%
21.0 / 27
100.0%
+127
63.5%
2367
0.59
1503
1 1 1 = = 1 1 0 1 1 1 1 0 1 0 1 1 1 0 = = 1 1 1 1 1 1
–   Abrok 5.02561+17
−17		(−109)13.5 − 8.5
(+8−3=11)
61.4%
13.5 / 22
100.0%
−41
55.4%
1152
0.69
638
1 1 = 1 0 = = 1 = = = 1 1 = 0 = = 1 0 1 = =
1141 games in total: 390 wins, 367 losses, 384 draws (33.7%), score: 51.0%
Average opponent: −7.1 (2662.9), average distance to opponent: 41.4

Performance

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

Perf = C − 0.281 [±0.414] * 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