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
Jonny 2.83 WB#29–30  (2652+17
−17		)Quote
Author: Johannes Zwanzger (Germany) Released: 2005-12-03Link: WBEC
This engine is stable and runs without issues.
This is the only Jonny version we tested.
OpponentEloDiffResultsScoreLOSPerfPond
hit		Eval
diff
–   Alfil 8.1.1 Optimized2723+21
−21		(+71)13 − 15
(+7−9=12)
46.4%
13.0 / 28
0.0%
+46
54.5%
1356
0.69
739
= 1 0 = 1 1 = 0 0 = 1 = 0 = 0 0 = 1 0 = 0 = 1 1 = 0 = =
–   Movei 00.8.438 (10-10-10)2722+21
−21		(+70)8.5 − 16.5
(+4−12=9)
34.0%
8.5 / 25
0.0%
−35
52.2%
1499
0.63
782
1 1 = = = 0 0 0 0 0 0 0 0 = = 0 0 0 0 1 = = = 1 =
–   Pro Deo 1.62719+22
−22		(+67)11.5 − 14.5
(+7−10=9)
44.2%
11.5 / 26
0.0%
+28
52.2%
1733
0.62
905
0 0 1 1 0 = = = 1 0 0 = 0 = 1 = 0 1 0 0 = 1 1 = 0 =
–   Delfi 5.22718+21
−21		(+66)9 − 16
(+4−11=10)
36.0%
9.0 / 25
0.0%
−25
54.7%
1495
0.55
818
= 0 0 1 = = = 0 = 1 0 0 = = 1 = 0 1 0 0 = = 0 0 0
–   WildCat 72718+19
−19		(+66)14.5 − 17.5
(+11−14=7)
45.3%
14.5 / 32
0.0%
+31
56.7%
2375
0.74
1347
0 1 0 0 = 0 1 1 0 0 0 0 1 1 0 = 0 = = 1 0 0 1 = 1 0 = 0 1 1 = 1
–   Zappa 1.1 64-bit2717+19
−19		(+65)9.5 − 22.5
(+5−18=9)
29.7%
9.5 / 32
0.0%
−77
55.7%
1890
0.72
1053
0 = 0 = = 0 0 = 1 0 0 1 = 0 = 0 0 0 = 0 0 = 0 0 = 0 1 0 0 1 1 0
–   Slow Chess Blitz WV2.12716+19
−19		(+64)14.5 − 11.5
(+8−5=13)
55.8%
14.5 / 26
0.0%
+101
57.9%
1344
0.65
778
0 1 0 = = 1 = 1 0 1 = 1 = = 1 1 = = = 1 0 = = = 0 =
–   Alaric 7042713+26
−26		(+61)10.5 − 15.5
(+7−12=7)
40.4%
10.5 / 26
0.0%
−4
55.5%
1783
0.60
990
1 0 0 0 0 = = 0 = 1 1 1 = 0 0 1 = 0 0 = 0 = 0 1 1 0
–   Frenzee 3.0 64-bit2711+19
−19		(+59)10 − 14
(+6−10=8)
41.7%
10.0 / 24
0.0%
0
50.6%
1758
0.74
889
1 = 0 0 1 1 = 0 0 0 = 1 0 0 0 = = 1 0 = 1 = 0 =
–   Colossus 2007d2707+20
−20		(+55)8.5 − 21.5
(+5−18=7)
28.3%
8.5 / 30
0.0%
−100
53.8%
1928
0.68
1038
0 0 0 0 0 0 0 = 1 = 0 0 1 = 1 0 1 = 0 0 0 0 0 0 = 0 0 1 = =
–   Pharaon 3.5.12704+19
−19		(+52)7.5 − 19.5
(+6−18=3)
27.8%
7.5 / 27
0.0%
−125
56.4%
2720
0.64
1535
= 1 0 1 0 0 1 0 0 1 0 0 0 0 0 0 = 1 0 0 0 0 0 1 = 0 0
–   List 5.122699+18
−18		(+47)14.5 − 17.5
(+11−14=7)
45.3%
14.5 / 32
0.0%
+12
54.1%
2748
0.67
1488
= 1 0 0 1 0 0 1 0 = 1 0 1 0 1 1 0 = = 1 = 0 1 0 0 1 1 0 0 = 0 =
–   SOS 5.12697+18
−18		(+45)12.5 − 19.5
(+9−16=7)
39.1%
12.5 / 32
0.0%
−33
55.3%
2034
0.77
1125
0 1 0 1 1 = 0 0 0 0 0 1 = 0 = 1 0 1 0 0 0 1 0 0 0 1 = = = 1 0 =
–   Colossus 2007c2694+19
−19		(+42)14.5 − 13.5
(+10−9=9)
51.8%
14.5 / 28
0.0%
+53
52.9%
1912
0.60
1012
0 0 1 1 0 = 0 0 = 1 1 1 = 0 = = 0 0 1 = 1 1 = = 0 1 = 1
–   Ruffian 1.0.52687+17
−17		(+35)11.5 − 20.5
(+7−16=9)
35.9%
11.5 / 32
0.1%
−60
55.3%
2365
0.68
1308
1 = 0 = 1 0 1 = = 0 1 0 0 0 0 0 0 = 0 = 0 0 1 = 1 0 = 0 1 0 = 0
–   Petir 4.392682+18
−18		(+30)11.5 − 14.5
(+8−11=7)
44.2%
11.5 / 26
0.4%
−13
57.3%
1867
0.59
1069
= 0 = 0 0 1 = = 0 1 1 0 0 0 1 = 0 1 0 = 1 1 = 1 0 0
–   Pseudo 0.7c2680+18
−18		(+28)11 − 11
(+7−7=8)
50.0%
11.0 / 22
0.6%
+29
54.2%
1605
0.52
870
= = = = 0 1 1 0 0 1 = 0 = 1 = 0 0 1 0 = 1 1
–   Aristarch 4.502671+18
−18		(+19)16 − 16
(+14−14=4)
50.0%
16.0 / 32
4.1%
+19
49.3%
2639
0.88
1301
0 1 0 1 = 0 0 0 1 1 0 1 = 1 1 0 0 1 1 1 0 1 1 1 0 0 1 0 0 = 0 =
–   Petir 4.9999992670+19
−19		(+18)16.5 − 7.5
(+13−4=7)
68.8%
16.5 / 24
6.1%
+147
57.8%
1468
0.71
849
1 = 1 0 1 = 1 1 = 1 0 1 1 0 1 0 1 = = = = 1 1 1
–   Hamsters 0.62669+18
−18		(+17)8.5 − 17.5
(+3−12=11)
32.7%
8.5 / 26
6.2%
−92
53.6%
1376
0.56
738
0 = 1 = 0 = 0 0 = = 0 = 0 = 0 0 0 0 = = = 1 = 1 0 0
–   The Baron 2.23 64-bit2669+19
−19		(+17)16 − 16
(+12−12=8)
50.0%
16.0 / 32
6.3%
+17
56.2%
1976
0.79
1110
0 = 0 0 = 0 0 = 0 = 0 1 = 1 = 1 1 1 0 1 1 1 1 0 = 0 1 = 1 0 0 1
–   Booot 4.13.12668+18
−18		(+16)15.5 − 11.5
(+13−9=5)
57.4%
15.5 / 27
7.7%
+72
58.2%
2104
0.59
1224
= 1 0 1 1 = 1 0 1 0 = 0 0 0 0 1 1 1 0 = 0 1 1 1 = 1 1
–   BugChess2 1.5.22661+18
−18		(+9)13 − 9
(+11−7=4)
59.1%
13.0 / 22
20.7%
+78
57.9%
1536
0.66
889
1 1 = 0 1 = 1 1 1 0 0 = = 1 1 1 1 1 0 0 0 0
–   Crafty 21.5 64-bit PS2652+17
−17		(0)11 − 12
(+7−8=8)
47.8%
11.0 / 23
47.1%
−14
50.9%
1634
0.71
831
0 1 0 = 1 1 0 0 0 = 1 = 1 = 0 1 = = = 0 1 = 0
–   The Baron 1.8.12651+18
−18		(−1)13 − 15
(+9−11=8)
46.4%
13.0 / 28
51.8%
−27
50.7%
1740
1.06
882
= 0 0 0 0 0 = 1 1 0 = 0 1 0 = = 0 0 1 1 1 1 1 1 = = = 0
–   Anaconda 2.0.12644+17
−17		(−8)14 − 12
(+8−6=12)
53.8%
14.0 / 26
74.2%
+15
59.8%
1307
0.76
782
0 0 = = = 0 1 = = = = 0 1 1 1 1 1 = = = 0 = 1 = 1 0
–   Movei 00.8.4032643+22
−22		(−9)15.5 − 16.5
(+8−9=15)
48.4%
15.5 / 32
73.2%
−18
53.1%
1512
0.72
803
0 1 1 = 1 = = 0 = 0 = 1 = = 1 0 = = 1 1 = = 1 = = 0 0 0 0 = = 0
–   Fritz 5.322643+17
−17		(−9)12 − 12
(+7−7=10)
50.0%
12.0 / 24
77.3%
−15
57.9%
1479
0.66
857
= 1 = 1 0 = 1 = 0 0 = 0 1 0 = = 0 0 1 = 1 1 = =
–   Ktulu 4.22634+17
−17		(−18)12 − 13
(+8−9=8)
48.0%
12.0 / 25
94.1%
−34
60.4%
1366
0.71
825
= 1 1 0 = = 0 = 1 0 0 = 0 = = 0 1 1 = 1 0 0 0 1 1
–   Thinker 4.7a2634+17
−17		(−18)9.5 − 18.5
(+5−14=9)
33.9%
9.5 / 28
94.1%
−124
52.7%
1736
0.64
915
0 0 1 = = 0 0 = 0 0 0 0 = 0 = 0 0 0 = = 1 0 1 1 0 = 1 =
–   SmarThink 0.17a2633+16
−16		(−19)17.5 − 14.5
(+11−8=13)
54.7%
17.5 / 32
95.9%
+12
54.9%
1883
0.70
1033
= = 0 1 0 = = 0 1 = 0 = 1 = 1 = 1 = 0 1 0 1 1 = 1 0 = 0 1 1 = =
–   Ufim 8.022628+18
−18		(−24)16 − 9
(+14−7=4)
64.0%
16.0 / 25
98.0%
+86
54.0%
2184
0.62
1180
0 1 1 1 0 1 0 1 1 0 1 = 1 1 0 = = 1 0 1 1 = 1 0 1
–   Fritz 6 Light2627+19
−19		(−25)14 − 14
(+10−10=8)
50.0%
14.0 / 28
98.1%
−27
53.9%
1872
0.82
1009
= = 1 1 1 0 1 = 0 0 1 0 = 1 = 0 = = 1 0 0 1 0 0 1 0 = 1
–   Trace 1.37a2622+17
−17		(−30)14 − 13
(+11−10=6)
51.9%
14.0 / 27
99.5%
−19
52.9%
1978
0.75
1046
= 1 = 0 1 = 0 1 1 0 1 1 = 1 = 0 1 1 0 0 0 1 0 0 0 1 =
–   AnMon 5.602621+18
−18		(−31)14.5 − 15.5
(+12−13=5)
48.3%
14.5 / 30
99.6%
−42
51.5%
2544
0.60
1311
0 1 1 0 0 1 0 0 1 0 1 0 1 1 0 1 1 1 = = 0 = 0 = 0 0 1 0 = 1
–   E.T. Chess 18.11.052620+21
−21		(−32)12 − 15
(+8−11=8)
44.4%
12.0 / 27
99.3%
−67
56.3%
1799
0.68
1012
0 1 0 1 0 1 1 0 0 = = 0 0 0 1 0 1 0 = = 0 = = = 1 = 1
–   Little Goliath 3.12 Evolution (TB Off)2614+17
−17		(−38)14 − 16
(+12−14=4)
46.7%
14.0 / 30
99.9%
−63
48.0%
2936
0.87
1410
0 1 1 1 0 = 0 1 = 1 = = 1 0 1 0 1 0 0 1 0 0 0 0 0 1 0 0 1 1
–   Yace 0.99.872609+17
−17		(−43)14.5 − 11.5
(+11−8=7)
55.8%
14.5 / 26
100.0%
−6
55.0%
1879
0.69
1033
1 = 0 1 = 1 0 0 1 0 = 0 1 0 1 = 0 = 0 = = 1 1 1 1 1
–   Little Goliath 3.12 Evolution (TB On)2607+19
−19		(−45)12.5 − 8.5
(+10−6=5)
59.5%
12.5 / 21
100.0%
+21
47.9%
1638
0.78
784
= 1 0 = 1 0 = 1 1 = 1 0 = 1 1 1 0 0 1 1 0
–   Hamsters 0.52595+21
−21		(−57)14.5 − 9.5
(+12−7=5)
60.4%
14.5 / 24
100.0%
+19
54.5%
2088
0.72
1138
1 1 0 1 0 0 = 0 1 0 1 1 1 1 1 = 1 = 1 = 0 1 0 =
–   Pepito 1.59 32-bit2595+19
−19		(−57)21 − 5
(+18−2=6)
80.8%
21.0 / 26
100.0%
+175
53.2%
2131
0.58
1134
1 1 1 1 1 1 1 = 1 1 = 1 1 1 1 1 0 = = 1 = 1 = 1 0 1
–   Bruja 1.9 64-bit JA No-int-book2584+18
−18		(−68)15 − 10
(+11−6=8)
60.0%
15.0 / 25
100.0%
+4
52.9%
1807
0.86
956
1 = 1 1 1 1 = 1 0 1 1 = = 0 0 1 0 0 = 0 = = 1 1 =
–   Green Light Chess 3.002582+17
−17		(−70)12 − 11
(+9−8=6)
52.2%
12.0 / 23
100.0%
−48
55.4%
1682
0.60
932
= 1 0 1 = 0 1 0 0 1 1 0 = 1 1 = 1 = = 1 0 0 0
–   Tao 5.62574+17
−17		(−78)16 − 12
(+12−8=8)
57.1%
16.0 / 28
100.0%
−27
56.5%
1624
0.78
917
= = 1 1 1 0 = = 1 1 1 = 0 1 1 = 1 = 1 0 0 1 0 = 1 0 0 0
–   Cerebro 3.03d2572+19
−19		(−80)23.5 − 8.5
(+20−5=7)
73.4%
23.5 / 32
100.0%
+93
53.5%
2260
0.79
1210
= = 1 1 1 1 1 = 1 1 0 1 1 1 1 0 = 1 0 1 0 1 1 1 = 1 1 1 1 0 = =
–   Twisted Logic 20080404x2568+18
−18		(−84)13 − 11
(+10−8=6)
54.2%
13.0 / 24
100.0%
−54
50.8%
1856
0.66
942
= = = = 1 0 1 0 1 0 1 = 1 0 0 = 0 1 1 0 1 1 1 0
–   Arasan 10.0 64-bit2564+17
−17		(−88)22 − 4
(+20−2=4)
84.6%
22.0 / 26
100.0%
+201
56.2%
2077
0.62
1168
1 1 1 0 1 1 1 1 1 1 1 1 1 1 = 1 1 1 = 1 = = 1 1 1 0
–   Abrok 5.02561+17
−17		(−91)15 − 11
(+12−8=6)
57.7%
15.0 / 26
100.0%
−36
54.6%
1831
0.79
1000
0 0 1 = 0 1 1 1 = 1 1 = = 0 0 0 1 1 = 0 1 0 1 1 1 =
–   Amyan 1.5972552+17
−17		(−100)17.5 − 6.5
(+15−4=5)
72.9%
17.5 / 24
100.0%
+70
53.9%
1644
0.71
886
1 = = 1 = 1 0 1 = = 1 1 0 1 1 0 1 1 1 1 1 1 1 0
–   SpiderChess 0706032546+17
−17		(−106)17.5 − 9.5
(+15−7=5)
64.8%
17.5 / 27
100.0%
+3
54.7%
2021
0.52
1105
= 0 1 1 1 1 = 1 0 1 1 0 1 0 0 1 1 = 1 = 1 0 1 1 0 = 1
–   LambChop 10.992531+17
−17		(−121)17 − 12
(+15−10=4)
58.6%
17.0 / 29
100.0%
−53
56.6%
2445
0.51
1385
0 = = 1 1 1 1 1 1 0 1 0 0 1 0 0 = 0 0 0 1 = 1 0 1 1 1 1 1
1382 games in total: 508 wins, 494 losses, 380 draws (27.5%), score: 50.5%
Average opponent: −5.4 (2646.6), average distance to opponent: 46.4

Performance

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

Perf = C − 0.138 [±0.344] * 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