Author: John Merlino
Date: 09:51:23 06/18/04
Go up one level in this thread
On June 17, 2004 at 23:54:25, Jon Dart wrote:
>From a testgame Arasan-Phalanx:
>
>[D] r7/2R2N1r/8/N2k2p1/3Pnp2/4p3/6P1/R5K1 b - -
>
>Black played Rah8. This seems to be quite hard for some engines
>to find: a fairly recent Crafty version didn't select it after
>10 minutes search on my Athlon XP2500+. On other hand, if I
>force Rah8, and then search for White I get a -2.42 score
>under a minute.
>
>--Jon
CM_SKR on an AMD 2500+ finds Rah8 in one second, but then gives it up for g4 at
0:27. It takes a little more than another minute to go back to Rah8:
Time Depth Score Positions Moves
0:00 1/3 0.97 3172 1...Ra6 2.Re7 Rah6
0:00 1/3 0.63 6298 1...Rah8 2.Rd7+ Ke6 3.Nxh8 Rxd7
4.Nc6
0:00 1/3 -0.81 11190 1...Rf8 2.Rd7+ Ke6 3.Nxg5+ Nxg5
0:00 1/4 -0.80 13907 1...Rf8 2.Rb1 Rfxf7 3.Rb5+ Kd6
0:00 1/5 0.00 42769 1...Rf8 2.Re7 Rfxf7 3.Re5+ Kxd4
4.Nc6+ Kd3 5.Nb4+ Kd4 6.Nc6+
0:00 1/6 0.00 71004 1...Rf8 2.Re7 Rfxf7 3.Re5+ Kxd4
4.Nc6+ Kd3 5.Nb4+ Kd4 6.Nc6+
0:00 1/7 0.00 174192 1...Rf8 2.Re7 Rfxf7 3.Re5+ Kxd4
4.Nc6+ Kd3 5.Nb4+ Kd4 6.Nc6+
0:01 1/7 -0.08 313462 1...Rah8 2.Nxh8 Rxc7 3.Ng6 Nc3
4.Nb3 Kc4 5.Ra3 Ne2+ 6.Kf1 Nxd4
0:02 1/8 -0.98 641731 1...Rah8 2.Nxh8 Rxc7 3.Ng6 Ng3
4.Nf8 Ne2+ 5.Kf1 Nxd4 6.Ng6 Rc2
0:06 1/9 -1.05 1690172 1...Rah8 2.Rd7+ Ke6 3.Nxg5+ Nxg5
4.Rxh7 Rxh7 5.Nb3 f3 6.gxf3 Nxf3+
7.Kg2 Rf7 8.Ra8 Kd5 9.Ra5+ Ke4
0:12 1/10 -1.10 3398455 1...Rah8 2.Rd7+ Ke6 3.Nxg5+ Nxg5
4.Rxh7 Rxh7 5.Nb3 Ne4 6.Nc5+ Kd5
7.Nd3 Rf7 8.Ra4 e2 9.Rb4 f3 10.gxf3
Rxf3
0:27 1/10 -1.49 7691877 1...g4 2.Re7 Nc3 3.Re1 Rxa5 4.Re5+
Kxd4 5.Rxa5 Rxf7 6.Rg5 Re7 7.Rxg4
1:12 1/11 -0.35 20789820 1...g4 2.Re7 f3 3.Rxe4 f2+ 4.Kf1
Rh1+ 5.Ke2 Re1+ 6.Rxe1 fxe1=Q+
7.Kxe1 Kxe4 8.Nb3 Rb8 9.Nc5+ Kxd4
10.Ne6+ Kd5 11.Nc7+ Kc6 12.Ne6
Rb1+ 13.Ke2
1:32 1/11 -1.19 26361908 1...Rah8 2.Rd7+ Ke6 3.Nxg5+ Nxg5
4.Rxh7 Rxh7 5.Nb3 Ne4 6.Nc5+ Kd5
7.Nd3 Rf7 8.Rf1 e2 9.Re1 Kxd4
10.Nxf4
2:37 2/12 -1.22 45035587 1...Rah8 2.Rd7+ Ke6 3.Nxg5+ Nxg5
4.Rxh7 Rxh7 5.Nb3 Ne4 6.Nc5+ Kd5
7.Nxe4 Kxe4 8.Ra4 Kd5 9.Rb4 Rc7
10.Kf1 Rc1+ 11.Ke2
jm
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