Author: Moritz Berger
Date: 23:09:54 08/12/98
Here's an easy position - for some programs. I first had thought this would be
too easy but some programs had serious trouble with it:
r2qkb1r/pb1n1p2/2p1p2p/4N3/NpBP2pP/6P1/PP4P1/R2QK2R w KQkq - 0 15
Notable are the big improvement from Junior 4.6 to 5 and the black-outs of
Genius 5 and Crafty 15.17.
M-Chess seems to be unstable in this position as far as evaluations are
concerned but at least is lucky enough to stick to the right move.
Rebel 9 and Rebel 10 are clearly very much different in this position; Rebel 9
is faster but the Rebel 10 Anti-GM option again shows that there's more about it
than mere marketing hype
(note the clear +0.80 evaluation with Anti-GM strong).
Credits for this position go to ChessBase magazine 65 in the annotated Tactics
database.
All times on PII/400 256MB RAM, programs listed in order of solution times:
Shredder 2 Nxf7!
3" -1.12++ depth 7
7.01 0:03.14 -1.13 Qe2 Nxe5 Qxe5 Rg8 O-O-O Bg7 Qf4 (280.241)
7.02 0:03.23 -1.12++ Nxf7 (290.576)
7.02 0:03.50 -0.77++ Nxf7 (317.206)
7.02 0:03.98 -0.30 Nxf7 Kxf7 Qxg4 Qe7 O-O+ Ke8 Qg6+ Kd8 Bxe6 (363.896)
7 -> 0:05.31 -0.30 Nxf7 Kxf7 Qxg4 Qe7 O-O+ Ke8 Qg6+ Kd8 Bxe6 (474.075)
8 -> 0:08.73 +0.06 Nxf7 Kxf7 Qxg4 Qe7 O-O+ Ke8 Bxe6 Bg7 Rac1 (797.052)
9 -> 0:19.34 +0.29 Nxf7 Kxf7 Qxg4 Qe8 O-O+ Ke7 Rae1 Kd8 Rxe6 Be7
(1.821.248)
10 -> 0:53.07 +0.56 Nxf7 Kxf7 Qxg4 Qe8 O-O+ Ke7 Rae1 Kd8 Rxe6 Be7 Qf5
(5.110.841)
Hiarcs 6/Fritz Nxf7!
6" 0.09 depth 6
Hiarcs 6/DOS
6" >12 depth 6
10" 12 depth 6
19" >=44 depth 7
40" 50 depth 7
MCP 7.1 Nxf7!
21" -1.18 depth 6
26" -0.69 depth 6
31" 0.32 depth 7
42" 0.00 depth 7
73" 0.06 depth 8
210" -0.51 depth 9
Fritz 5 Nxf7!
8" -0.66 depth 9
12" -0.56 depth 10
26" -0.41 depth 11
62" -0.09 depth 12
Junior 5/CB 7 Nxf7!
10" -0.21 depth 14
24" 0.09 depth 14
Rebel 9 Nxf7!
30" 0.00 depth 9
67" 0.21 depth 10
Rebel 10 Nxf7!
Anti-GM off Anti-GM strong
58" -0.02 depth 9 46" -0.07 depth 9
69" 0.23 depth 9
118" 0.45 depth 10 139" 0.80 depth 10
Junior 4.6/Fritz 5 Nxf7!
95" -0.19 depth 14
124" 0.51 depth 14
WCrafty 15.17 (96M hash + 20M hashp)
1272" ++ depth 13
1553" 0.48 depth 13
12-> 11:40 -0.55 1. Qxg4 Nxe5 2. dxe5 h5 3. Qf4 Qa5
4. O-O O-O-O 5. b3 Bh6 6. Qe4 c5 7.
Qc2
13 15:36 -0.54 1. Qxg4 Nxe5 2. dxe5 h5 3. Qf4 Qa5
4. O-O O-O-O 5. b3 Kb8 6. Rad1 Rxd1
7. Rxd1 Qc7 8. Qd4
13 21:12 ++ 1. Nxf7!!
13 25:53 0.48 1. Nxf7 Kxf7 2. Qxg4 Qe7 3. O-O Ke8
4. Bxe6 Bc8 5. Qh5+ Kd8 6. Qa5+ Nb6
7. Nxb6 axb6 8. Qxa8 Qxe6 9. Rae1
13-> 27:23 0.48 1. Nxf7 Kxf7 2. Qxg4 Qe7 3. O-O Ke8
4. Bxe6 Bc8 5. Qh5+ Kd8 6. Qa5+ Nb6
7. Nxb6 axb6 8. Qxa8 Qxe6 9. Rae1
Genius 5/DOS
2773" 0.00 depth 10
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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