Author: Roy Eassa
Date: 08:53:00 06/27/02
Go up one level in this thread
On June 27, 2002 at 04:04:07, Vincent Diepeveen wrote:
>Hello,
>
>Several positions in WM test the solutions given aren't the
>objective best moves.
>
>For example i get impression that at position 16:
>
>
>r1k4r/1b1q1pp1/p6p/3n4/1B3Pn1/1P1B4/P1PQ3P/2KRR3 w - - bm Ba5; id "CSS WM-Test
>16) Lb4-a5 (K)";
>
>Undoubtfully Ba5 is a good move, but completely material
>winning is c2-c4 here. You get directly a rook at the 7th rank,
>swallow f7 + g7, and black is completely immobilized the rest of
>the game. Soon also Rd1-e1-e7 happens and it's a mate in XXX soon
>then.
>
>I can imagine why a human plays Ba5 here and doesn't take a risk (note
>the chessprograms want this all initially too), but let's look objective
>to the position. Not finding c4 soon means a program is a tactical joke.
>
>As a human i wouldn't find c4 so soon either. I would go for Ba5, because
>i know how much i suck in tactics.
>
>Best regards,
>Vincent
[d] r1k4r/1b1q1pp1/p6p/3n4/1B3Pn1/1P1B4/P1PQ3P/2KRR3 w - -
I think the point of 1.Ba5 is to play c4 NEXT, when it is even more effective.
Here are some possibilities:
1.Ba5!
[1.c4 Nxb4 2.Qxb4 Nf6
(2...Kb8 3.Re7 a5 4.Qe1 Qc8 5.h3 Nf6 6.Qe5+ Ka7 7.Qd4+ Kb8 8.Qd6+ Ka7
9.c5 Rd8 10.Qb6+ Kb8 11.Rxb7+ Qxb7 12.Qxd8+ +-)
3.Re7 Qc6 4.Rxf7
(4.Bf5+ Kb8 5.Rd6 a5 6.Qb6 Qxb6 7.Rxb6 Ra7 8.Rxf7 +=)
4...a5
(4...Kb8 5.Rxg7 Rd8 6.Bf1 Rxd1+ 7.Kxd1 Qf3+ 8.Be2 Qh1+ 9.Kc2 +-)
5.Qc3 Re8
(5...Qe6 6.Rxg7 Re8 7.Bg6 Rf8 8.Qd4 Kb8 9.Bf5! Qxf5 10.Qd6+ Ka7
11.Rxb7+ Kxb7 12.Qe7+ +-)
6.Bg6 Qc5
(6...Kb8 7.Rxg7 Re2 8.Rd8+ Bc8 9.Bf5 +-)
7.Rxf6
(7.Qd3 Rg8 8.Bh7 Rh8 9.Rxg7 Kb8 10.Bg6 Ra6 =)
7...Re2 8.b4 axb4 9.Qd3 Kb8 10.Qxe2 gxf6 +=]
1...Kb8
[1...Bc6 2.c4 Ndf6 3.h3 Bf3 4.Bf5 Qxf5 5.Re7 +-]
[1...h5 2.c4 Nc7 3.Qb4 Ne6 4.Bf5 Qc6 5.Rd6 +-]
2.c4! Nde3 3.Rxe3 Nxe3 4.Qxe3 Re8 5.Be4 Qc8 6.Qb6 Ra7 7.Bb4 Ka8 8.Bc5 Qb8 9.Rd7
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