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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Scorpio 2.0 32-bit WB#9  (2754+23
−23		)Quote
Author: Daniel Shawul (Ethiopia) Released: 2007-10-30Links: WBEC, Jim Ablett's compile
Scorpio is using 3 to 5-piece bitbases of its own format in this tournament (379 MB).
This engine is stable and runs without issues.
This is one of the 2 Scorpio versions we tested: Compare them!
OpponentEloDiffResultsScoreLOSPerfPond
hit		Eval
diff
–   Fruit 2.3 32-bit2888+23
−23		(+134)9.5 − 18.5
(+6−15=7)
33.9%
9.5 / 28
0.0%
+20
59.6%
2041
0.63
1217
0 0 0 0 = 0 = 1 0 1 0 = 0 1 = = 0 = = 0 0 0 0 0 1 0 1 1
–   Spike 1.2 Turin2842+23
−23		(+88)10 − 13
(+4−7=12)
43.5%
10.0 / 23
0.0%
+51
57.9%
1124
0.64
651
1 = 1 0 1 0 = = = = = 0 = 1 0 = = = 0 0 = = 0
–   Glaurung 2.0.1 64-bit2838+23
−23		(+84)8.5 − 16.5
(+3−11=11)
34.0%
8.5 / 25
0.0%
−16
56.5%
1448
0.76
818
0 = 0 0 0 0 0 = = 1 1 = = = 0 = = = 0 = 0 = 0 0 1
–   Frenzee Feb08 64-bit2810+24
−24		(+56)14.5 − 17.5
(+10−13=9)
45.3%
14.5 / 32
0.0%
+22
52.6%
2629
0.79
1382
0 1 = 1 0 0 = = 1 = = 0 1 0 0 0 0 0 1 = 1 0 = 0 = 1 0 1 = 1 1 0
–   Delfi 5.42801+24
−24		(+47)13 − 19
(+10−16=6)
40.6%
13.0 / 32
0.1%
−23
61.4%
2593
0.71
1593
0 0 0 0 0 0 1 1 0 1 0 0 = = 1 1 0 = 0 1 1 1 1 = 0 1 = = 0 0 0 0
–   Naum 2.0 64-bit2793+21
−21		(+39)8.5 − 17.5
(+5−14=7)
32.7%
8.5 / 26
0.3%
−78
58.2%
1922
0.74
1119
0 0 = 0 = 0 0 0 0 1 1 0 1 = 0 1 0 = 0 1 = = 0 0 = 0
–   Bright 0.2c2786+23
−23		(+32)14.5 − 13.5
(+11−10=7)
51.8%
14.5 / 28
1.6%
+43
53.1%
2631
1.05
1398
1 0 1 0 1 0 1 0 = 1 1 0 0 = 0 0 0 = 1 = 1 = 0 1 1 1 = =
–   Alaric 7072768+22
−22		(+14)11.5 − 14.5
(+9−12=5)
44.2%
11.5 / 26
15.8%
−31
57.9%
2169
0.74
1256
= = 1 0 1 0 = 1 1 0 0 0 1 0 0 1 = = 1 0 0 1 0 0 0 1
–   E.T. Chess 13.01.082733+21
−21		(−21)12.5 − 12.5
(+7−7=11)
50.0%
12.5 / 25
93.8%
−18
59.4%
1149
0.60
682
= 0 0 = = 1 0 = = = 1 0 0 0 = = 1 = 1 = 1 1 1 = 0
–   WildCat 82730+22
−22		(−24)19.5 − 12.5
(+16−9=7)
60.9%
19.5 / 32
95.7%
+56
56.0%
2402
0.76
1345
1 0 0 = = 1 1 1 0 = = 1 1 1 = 1 1 0 1 1 0 = 1 1 1 0 0 0 0 = 1 1
–   Alfil 8.1.1 Optimized2723+21
−21		(−31)17 − 10
(+13−6=8)
63.0%
17.0 / 27
98.7%
+59
57.9%
1776
0.93
1029
= 1 = 1 1 0 0 0 = 0 0 1 1 = 1 1 1 1 1 = 1 0 1 1 = = =
–   Movei 00.8.438 (10-10-10)2722+21
−21		(−32)14.5 − 9.5
(+8−3=13)
60.4%
14.5 / 24
99.1%
+25
59.8%
971
0.81
581
0 1 0 = 0 1 = 1 = 1 = = = 1 = 1 = 1 = 1 = = = =
–   Pro Deo 1.62719+22
−22		(−35)14 − 10
(+9−5=10)
58.3%
14.0 / 24
99.4%
+17
55.2%
1267
1.09
700
= 1 = = 1 1 = = 0 1 1 = 0 = 0 1 = 0 = 0 1 1 = 1
–   Delfi 5.22718+21
−21		(−36)11 − 15
(+7−11=8)
42.3%
11.0 / 26
99.5%
−85
59.6%
1767
0.73
1054
1 0 = 0 0 1 0 1 = 0 = 1 0 = 1 = 0 0 1 1 0 = = 0 0 =
–   WildCat 72718+19
−19		(−36)15.5 − 10.5
(+11−6=9)
59.6%
15.5 / 26
99.7%
+26
57.2%
1484
0.83
849
1 0 1 1 = 1 1 1 1 = = = = 1 0 = 1 0 0 1 = = 0 = 0 1
–   Zappa 1.1 64-bit2717+19
−19		(−37)13.5 − 10.5
(+10−7=7)
56.3%
13.5 / 24
99.7%
+9
53.9%
1722
0.81
929
= 1 1 1 = 1 1 0 0 0 = 0 1 = = = 1 0 = 1 1 0 1 0
–   Slow Chess Blitz WV2.12716+19
−19		(−38)16 − 10
(+12−6=8)
61.5%
16.0 / 26
99.8%
+41
58.8%
1844
0.87
1085
1 0 1 = 0 1 0 = 1 1 0 = 1 = 1 0 = 1 = 1 1 0 = = 1 1
–   Frenzee 3.0 64-bit2711+19
−19		(−43)15 − 11
(+11−7=8)
57.7%
15.0 / 26
99.9%
+11
52.7%
1872
0.76
987
0 = 1 = 1 1 1 = 0 1 1 0 0 1 0 0 1 = = = = 1 = 1 0 1
–   Colossus 2007d2707+20
−20		(−47)12 − 12
(+8−8=8)
50.0%
12.0 / 24
100.0%
−50
56.7%
1650
0.73
936
1 1 1 0 1 0 = 1 0 1 = = 1 = 0 = 0 = 0 = = 0 1 0
–   Pharaon 3.5.12704+19
−19		(−50)14 − 11
(+11−8=6)
56.0%
14.0 / 25
100.0%
−13
56.5%
1592
1.07
899
0 0 1 1 1 0 1 1 1 0 1 0 1 = = = = = 1 0 1 0 = 1 0
–   List 5.122699+18
−18		(−55)18.5 − 8.5
(+15−5=7)
68.5%
18.5 / 27
100.0%
+78
58.3%
1548
0.92
902
1 0 = = = = 0 1 1 1 = 1 1 = 1 0 1 1 0 1 = 1 1 1 0 1 1
–   SOS 5.12697+18
−18		(−57)16 − 11
(+11−6=10)
59.3%
16.0 / 27
100.0%
0
56.1%
1881
0.98
1056
= = = 0 0 = 1 1 = 1 1 1 0 1 1 = 1 1 = 1 = = 0 1 0 0 =
–   Colossus 2007c2694+19
−19		(−60)16 − 13
(+10−7=12)
55.2%
16.0 / 29
100.0%
−28
60.5%
1607
0.94
973
0 0 = = 1 = 0 = 0 1 = = = = 1 = 1 1 0 = 0 = 0 = 1 1 1 1 1
–   Ruffian 1.0.52687+17
−17		(−67)15.5 − 13.5
(+9−7=13)
53.4%
15.5 / 29
100.0%
−45
62.8%
1521
0.64
955
1 1 = 1 = = 0 0 = = 0 1 0 0 = = = 1 0 1 = 0 = 1 = = 1 1 =
–   Petir 4.392682+18
−18		(−72)10.5 − 13.5
(+6−9=9)
43.8%
10.5 / 24
100.0%
−110
57.7%
1711
0.88
987
1 = = 0 1 = 0 0 1 0 0 = 1 = 0 1 0 1 = 0 = = = 0
–   Pseudo 0.7c2680+18
−18		(−74)12.5 − 11.5
(+10−9=5)
52.1%
12.5 / 24
100.0%
−59
61.3%
1975
0.86
1211
1 = = 0 0 1 1 1 1 1 = = 0 0 1 0 = 1 1 1 0 0 0 0
–   Aristarch 4.502671+18
−18		(−83)20.5 − 8.5
(+15−3=11)
70.7%
20.5 / 29
100.0%
+47
56.1%
1194
0.85
670
0 1 = = 1 = 1 1 1 = = 0 = = 1 1 = 1 1 1 1 = 1 1 1 1 = 0 =
–   Petir 4.9999992670+19
−19		(−84)18 − 6
(+14−2=8)
75.0%
18.0 / 24
100.0%
+82
60.5%
1525
1.27
923
1 1 1 1 1 0 = = 1 = = 1 = 1 1 = 1 0 1 1 1 = = 1
–   The Baron 2.23 64-bit2669+19
−19		(−85)21 − 11
(+15−5=12)
65.6%
21.0 / 32
100.0%
+15
57.2%
1471
0.91
841
1 = = 0 1 = 1 1 1 1 0 0 = = = 1 = 1 1 1 = 1 0 1 = = 1 = 0 = 1 1
–   Booot 4.13.12668+18
−18		(−86)15.5 − 12.5
(+9−6=13)
55.4%
15.5 / 28
100.0%
−53
59.8%
1638
0.70
980
= = = 0 = = 0 = 1 1 0 = = 1 = = 0 = = 0 1 0 1 1 = 1 1 1
802 games in total: 295 wins, 240 losses, 267 draws (33.3%), score: 53.4%
Average opponent: −21.6 (2732.4), average distance to opponent: 55.1

Performance

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

Perf = C + 0.078 [±0.315] * 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