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
Natwarlal 0.14 WB#96  (2359+17
−17		)Quote
Author: Pallav Nawani (India) Released: 2007-03-05Link: Homepage
Issues with this engine: Frequent crashes.
This is the only Natwarlal version we tested.
OpponentEloDiffResultsScoreLOSPerfPond
hit		Eval
diff
–   The Crazy Bishop 00522460+15
−15		(+101)8 − 24
(+4−20=8)
25.0%
8.0 / 32
0.0%
−80
54.3%
2519
0.67
1367
0 0 = 0 0 1 = 0 0 0 1 0 0 = = 0 1 0 0 = 1 0 0 = 0 0 0 0 = 0 0 =
–   Gosu 0.162455+16
−16		(+96)11.5 − 20.5
(+6−15=11)
35.9%
11.5 / 32
0.0%
+4
51.9%
2410
0.92
1251
1 0 1 0 0 = 0 0 1 = = 1 0 = 0 = 1 0 0 = = = 0 = = 0 0 0 0 0 = 1
–   Phalanx XXII Reborn JA2452+15
−15		(+93)12 − 20
(+10−18=4)
37.5%
12.0 / 32
0.0%
−5
50.4%
2657
0.74
1338
0 0 0 1 = 0 1 = 0 = 0 1 0 0 0 1 1 0 0 0 1 1 = 1 0 0 0 1 0 0 1 0
–   Homer 2.012452+17
−17		(+93)18 − 14
(+14−10=8)
56.3%
18.0 / 32
0.0%
+139
54.3%
2087
0.88
1133
1 1 0 1 1 0 1 0 = 1 = = 1 0 = 1 = 0 = 1 1 1 0 1 0 1 0 = = 1 0 0
–   Betsy 6.51 Nobook2450+15
−15		(+91)17.5 − 14.5
(+13−10=9)
54.7%
17.5 / 32
0.0%
+122
56.6%
2583
0.62
1463
= 1 1 1 0 0 1 = = 0 = 0 1 0 0 1 = = 0 1 0 1 0 1 = = = 1 1 1 1 0
–   GNU Chess 5.07.9b 64-bit JA2448+16
−16		(+89)10.5 − 21.5
(+8−19=5)
32.8%
10.5 / 32
0.0%
−45
55.2%
2623
0.79
1447
= 0 1 0 = 0 0 0 1 0 1 0 0 1 0 1 = 0 0 0 = 0 1 1 0 0 0 0 = 1 0 0
–   Amateur 2.822446+15
−15		(+87)10.5 − 21.5
(+8−19=5)
32.8%
10.5 / 32
0.0%
−45
55.3%
2589
1.06
1432
1 = = 0 0 1 0 0 0 0 1 0 0 0 1 0 = 0 0 0 0 0 0 0 1 0 1 1 1 = = 0
–   Tytan 9.32 64-bit2429+17
−17		(+70)11.5 − 20.5
(+8−17=7)
35.9%
11.5 / 32
0.0%
−32
  
0 0 1 1 0 0 = = = = 0 1 0 0 0 = 0 0 1 1 0 = 0 0 0 0 0 0 1 1 = 1
–   Sage 3.532424+19
−19		(+65)18 − 14
(+13−9=10)
56.3%
18.0 / 32
0.0%
+109
55.0%
1940
0.86
1067
0 1 1 0 0 1 0 1 = 1 1 = 1 0 1 = 0 = 0 1 = = 0 0 1 = 1 = = 1 1 =
–   Sorgenkind 0.42421+18
−18		(+62)16 − 16
(+13−13=6)
50.0%
16.0 / 32
0.0%
+62
51.7%
3232
1.26
1671
0 0 1 1 0 1 0 = 0 = = 0 0 1 = 1 = 1 1 = 0 1 1 1 1 0 0 1 1 0 0 0
–   Horizon 4.42419+18
−18		(+60)12.5 − 19.5
(+10−17=5)
39.1%
12.5 / 32
0.0%
−22
49.9%
2726
1.33
1360
0 = 0 1 = 1 0 1 0 0 1 0 1 1 = 0 0 1 1 0 1 0 0 0 = 0 0 1 0 = 0 0
–   Thor's Hammer 2.28 32-bit2417+15
−15		(+58)14 − 18
(+12−16=4)
43.8%
14.0 / 32
0.0%
+7
56.6%
2263
1.06
1281
1 0 0 1 1 0 0 1 = 1 0 0 1 0 = 0 = 1 0 = 1 0 0 1 0 0 1 1 0 0 1 0
–   Arion 1.72415+16
−16		(+56)14 − 18
(+9−13=10)
43.8%
14.0 / 32
0.0%
+11
59.9%
2542
0.86
1522
= = 0 0 0 0 = 0 1 1 1 0 1 = 1 = 1 0 0 0 1 = 0 = 1 = 0 1 0 = = 0
–   AICE 0.99.22411+16
−16		(+52)14.5 − 17.5
(+10−13=9)
45.3%
14.5 / 32
0.0%
+19
51.7%
2361
0.85
1221
= = 1 = 0 1 0 = 1 1 0 0 1 0 = 0 1 = = 0 1 0 = 0 = 1 0 1 0 0 0 1
–   Chezzz 1.0.32409+15
−15		(+50)11.5 − 20.5
(+8−17=7)
35.9%
11.5 / 32
0.0%
−53
54.9%
2687
0.70
1475
0 0 = 1 0 0 = 1 0 1 = 1 1 = 1 0 1 = 0 0 = 0 1 0 = 0 0 0 0 0 0 0
–   Asterisk 0.62402+17
−17		(+43)14 − 18
(+11−15=6)
43.8%
14.0 / 32
0.0%
−2
54.1%
2453
0.81
1327
0 0 = = 1 0 0 0 = 1 1 0 0 1 0 0 0 = 1 0 0 0 0 1 1 1 = 1 0 1 = 1
–   Resp 0.19 64-bit JA Nobook2402+16
−16		(+43)17 − 15
(+14−12=6)
53.1%
17.0 / 32
0.0%
+68
55.1%
2686
0.92
1480
1 0 1 1 = 1 0 0 1 0 1 1 1 0 = 1 0 1 1 = 0 0 = 0 1 = = 0 1 0 1 0
–   Averno 0.812396+15
−15		(+37)13.5 − 18.5
(+11−16=5)
42.2%
13.5 / 32
0.0%
−24
55.1%
2657
0.83
1463
0 1 = = 1 0 0 0 0 0 1 0 = 1 0 0 0 0 0 0 0 1 1 0 = 1 0 1 = 1 1 1
–   Scidlet 3.61 64-bit JA2390+15
−15		(+31)16.5 − 15.5
(+12−11=9)
51.6%
16.5 / 32
0.2%
+40
60.1%
2320
0.70
1394
0 1 0 1 1 1 0 1 = = 0 = 1 = 0 = 0 1 0 = = 1 0 = 0 1 0 1 = 1 0 1
–   KnightX 1.922385+15
−15		(+26)11 − 21
(+10−20=2)
34.4%
11.0 / 32
1.0%
−103
55.1%
2948
0.83
1623
0 0 0 1 0 0 0 = 1 0 0 0 1 0 0 0 0 1 0 = 1 0 1 0 0 0 0 1 1 1 1 0
–   Eeyore 1.482384+15
−15		(+25)16 − 16
(+10−10=12)
50.0%
16.0 / 32
1.0%
+24
56.2%
2465
0.83
1386
0 = 0 = = 0 0 = 1 1 1 0 = = 0 0 1 1 = 0 1 = 1 = = 1 = 1 1 0 0 =
–   Ayito 0.2.9942371+16
−16		(+12)12.5 − 19.5
(+10−17=5)
39.1%
12.5 / 32
13.6%
−71
55.7%
2706
0.84
1508
1 = 0 0 0 0 = 0 0 0 1 1 1 0 1 = 0 0 1 1 1 1 1 0 = 0 0 0 = 0 0 0
–   Matilde 2008 64-bit2368+15
−15		(+9)14 − 18
(+12−16=4)
43.8%
14.0 / 32
18.7%
−39
57.8%
3549
0.65
2051
1 0 1 1 0 0 1 1 0 0 = 0 0 0 0 = 1 0 1 = 0 1 = 0 1 0 1 0 1 0 0 1
–   EXchess 5.01 beta 64-bit JA2355+14
−14		(−4)16.5 − 15.5
(+12−11=9)
51.6%
16.5 / 32
63.1%
+5
58.6%
2009
0.75
1178
= 1 = 1 0 1 1 0 1 1 0 1 = = 1 0 1 = = 0 = 0 1 1 0 0 0 0 = = 1 0
–   Zeus 1.292346+16
−16		(−13)14 − 18
(+10−14=8)
43.8%
14.0 / 32
86.9%
−55
53.1%
3058
1.08
1624
0 1 0 = 0 1 0 1 0 0 = 1 0 1 0 = 0 = 1 0 1 0 0 = = = 1 1 0 1 0 =
–   Esc 1.162345+15
−15		(−14)16 − 16
(+13−13=6)
50.0%
16.0 / 32
90.1%
−15
57.6%
2366
0.71
1363
1 0 0 1 0 1 1 = 0 1 0 0 1 1 0 0 0 1 0 1 = = 0 1 1 1 = = 0 1 0 =
–   Popochin 3.22341+19
−19		(−18)16 − 16
(+12−12=8)
50.0%
16.0 / 32
92.5%
−19
61.1%
2276
0.56
1391
1 = 1 0 0 = = 1 0 1 = 0 0 = 1 0 = 1 1 1 0 0 0 1 1 0 1 = 0 = 1 0
–   ANT 2006-F2333+16
−16		(−26)17 − 15
(+14−12=6)
53.1%
17.0 / 32
98.7%
−1
52.4%
2584
0.79
1353
= 1 0 0 1 0 1 = 0 1 1 0 0 1 0 1 1 1 1 0 1 = 0 = 0 1 0 1 1 = = 0
–   Anechka 0.082320+16
−16		(−39)21.5 − 10.5
(+17−6=9)
67.2%
21.5 / 32
100.0%
+79
54.8%
2231
1.05
1223
= 1 = 1 1 1 0 = 0 = 0 1 1 1 = 0 1 = 1 = 1 1 1 1 1 1 0 1 0 = = 1
–   Dorky 3.482308+16
−16		(−51)19 − 13
(+16−10=6)
59.4%
19.0 / 32
100.0%
+17
58.3%
2626
0.94
1531
1 0 1 1 0 1 1 = = 0 1 1 1 0 1 1 1 1 1 0 = = = 0 1 0 = 0 0 1 1 0
–   CyberPagno 2.1 32MB2295+16
−16		(−64)16 − 16
(+12−12=8)
50.0%
16.0 / 32
100.0%
−64
55.9%
2895
0.68
1618
= 0 = 1 1 0 1 = 0 0 1 = 1 0 = 1 0 0 1 0 1 0 0 = 0 1 = = 0 1 1 1
–   Latista (Sinobyl) 1.52289+16
−16		(−70)20.5 − 11.5
(+17−8=7)
64.1%
20.5 / 32
100.0%
+32
54.2%
2547
0.69
1380
1 1 0 0 = 1 1 0 1 1 = = 0 1 = 1 0 1 = 1 1 1 0 1 1 1 0 = 1 = 0 1
–   Madeleine 0.22285+15
−15		(−74)22 − 10
(+20−8=4)
68.8%
22.0 / 32
100.0%
+72
54.1%
3035
1.14
1642
1 0 1 1 = 1 1 0 0 1 1 1 1 1 = 1 = 1 1 0 0 1 = 1 1 0 1 1 1 0 1 0
–   Chispa 4.0.32273+14
−14		(−86)18 − 14
(+10−6=16)
56.3%
18.0 / 32
100.0%
−50
56.6%
1595
0.80
903
= 1 = = 1 1 = 1 = 1 0 0 1 = 1 1 = = = = = 1 = 1 0 0 = = 0 = = 0
–   Uralochka 1.1b2272+18
−18		(−87)18 − 14
(+15−11=6)
56.3%
18.0 / 32
100.0%
−39
54.7%
2494
1.01
1365
1 1 1 = 0 0 1 1 0 0 0 1 0 0 = = = 1 1 1 0 0 = 1 1 0 1 1 0 1 = 1
–   Atlas 2.202271+17
−17		(−88)21.5 − 10.5
(+18−7=7)
67.2%
21.5 / 32
100.0%
+37
  
1 = 1 = 1 1 0 0 1 1 0 1 0 1 = = 1 1 1 0 1 1 = = 1 1 1 0 1 1 = 0
–   Genesis 2.02247+16
−16		(−112)19.5 − 12.5
(+17−10=5)
60.9%
19.5 / 32
100.0%
−29
57.1%
2974
0.84
1697
0 1 1 1 0 0 1 1 = 1 0 1 0 = 1 = = 1 0 0 0 1 1 0 1 1 1 1 1 0 1 =
–   Lime 662241+18
−18		(−118)22.5 − 9.5
(+19−6=7)
70.3%
22.5 / 32
100.0%
+32
54.7%
2166
1.04
1185
1 1 1 1 1 0 = 1 1 0 0 = 1 0 1 0 0 1 1 1 = 1 1 = = 1 = = 1 1 1 1
–   InmiChess 3.06N2241+15
−15		(−118)24 − 8
(+21−5=6)
75.0%
24.0 / 32
100.0%
+75
56.3%
2562
0.76
1443
0 = 1 1 1 = = 1 1 1 0 1 1 1 1 1 = = 1 1 0 1 1 1 0 1 1 1 1 = 0 1
–   Nesik 0.7.0 alpha2237+16
−16		(−122)17.5 − 14.5
(+13−10=9)
54.7%
17.5 / 32
100.0%
−89
56.7%
1974
0.92
1120
1 1 = 1 0 = = 0 0 = = 1 1 1 = 0 0 1 0 0 1 = 1 = 0 0 = 1 1 1 0 1
–   NagaSkaki 5.122232+18
−18		(−127)15.5 − 16.5
(+11−12=9)
48.4%
15.5 / 32
100.0%
−137
55.3%
2082
0.96
1152
0 0 = 0 1 0 0 1 0 = 0 0 1 = 0 = = 1 = 1 1 = 0 1 1 1 0 = = 1 1 0
–   Sunsetter C10.3 64-bit JA2232+16
−16		(−127)23 − 9
(+19−5=8)
71.9%
23.0 / 32
100.0%
+30
53.0%
2676
0.95
1418
1 1 1 0 = 1 0 1 1 1 1 1 1 0 1 = 1 1 = = 1 1 = 0 1 1 1 = 0 1 = =
–   Alarm 0.93.12226+16
−16		(−133)23 − 9
(+22−8=2)
71.9%
23.0 / 32
100.0%
+55
56.1%
2500
1.03
1402
0 1 0 1 1 1 1 = 1 1 1 0 1 1 1 0 1 = 1 1 1 1 0 1 0 0 1 0 1 1 1 1
–   WJChess 1.642215+16
−16		(−144)20 − 12
(+17−9=6)
62.5%
20.0 / 32
100.0%
−50
58.0%
2334
0.84
1354
1 1 1 1 1 1 0 0 1 1 1 1 0 = 1 0 = 1 0 1 = 0 0 1 1 = 0 = 1 0 = 1
1408 games in total: 561 wins, 538 losses, 309 draws (21.9%), score: 50.8%
Average opponent: −6.5 (2352.5), average distance to opponent: 67.8

Performance

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

Perf = C + 0.105 [±0.231] * 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