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Subject: Re: Testposition from Smirin - ChessTiger

Author: John Merlino

Date: 17:44:10 04/28/02

Go up one level in this thread


On April 28, 2002 at 16:53:14, Gian-Carlo Pascutto wrote:

>[D]r4k2/1p2q2p/1Q2bp1P/rP2p1p1/P2pP3/2bP2P1/3N1PBK/R1R5 b - - 0 29
>
>Avoid mode : Bxa1
>
>27 seconds to fail low for Sjeng, 57 to find a new move. I do
>not know if it is really better though.
>
>Ilya Smirin - Gambit Tiger
>r4k2/1p2q2p/1Q2bp1P/rP2p1p1/P2pP3/2bP2P1/3N1PBK/R1R5 b - - 0 1
>
>Analysis by Sjeng 12.12:
>
>29...Bxa1 30.Rc7 Qd8 31.Qxe6 Qxc7 32.Qxf6+ Qf7 33.Qh8+ Qg8 34.Qf6+ Ke8 35.Qxe5+
>Kd8
>  -+  (-3.18)   Depth: 8/22   00:00:04  1314kN
>29...Bxa1 30.Rc7 Qd8 31.Qxe6 Qxc7 32.Qxf6+ Qf7 33.Qh8+ Qg8 34.Qf6+ Ke8 35.Qxe5+
>Kd8
>  -+  (-3.18)   Depth: 8/26   00:00:06  2204kN
>29...Bxa1 30.Rc7 Qd8 31.Qxe6 Qxc7 32.Qxf6+ Qf7 33.Qh8+ Qg8 34.Qf6+ Ke8 35.Qxe5+
>Kd7 36.Qf5+ Kd8
>  -+  (-3.22)   Depth: 9/26   00:00:06  2721kN
>29...Bxa1 30.Rc7 Qd8 31.Qxe6 Qxc7 32.Qxf6+ Qf7 33.Qh8+ Qg8 34.Qf6+ Ke8 35.Qxe5+
>Kd7 36.Qf5+ Kd8
>  -+  (-3.22)   Depth: 9/30   00:00:11  5091kN
>29...Bxa1 30.Rc7 Qd8 31.Qxe6 Qxc7 32.Qxf6+ Qf7 33.Qh8+ Qg8 34.Qf6+ Ke8 35.Qxe5+
>Kd7 36.Qf5+ Kd8 37.e5 Rxa4 38.Bxb7
>  -+  (-2.99)   Depth: 10/30   00:00:12  5988kN
>29...Bxa1 30.Rc7 Qd8 31.Qxe6 Qxc7 32.Qxf6+ Qf7 33.Qh8+ Qg8 34.Qf6+ Ke8 35.Qxe5+
>Kd7 36.Qf5+ Kd8 37.e5 Rxa4 38.Bxb7
>  -+  (-2.99)   Depth: 10/30   00:00:25  14201kN
>29...Bxa1
>  -+  (-2.49)   Depth: 11/30   00:00:27  15486kN
>29...Bf7 30.Bh3 R5a7 31.Nf3 g4 32.Bxg4 Bxa1 33.Rxa1 Rxa4 34.Rxa4 Rxa4 35.Bc8 Ra3
>  -+  (-2.61)   Depth: 11/30   00:00:57  33290kN
>29...R5a7 30.Nf3 g4 31.Nh4 Bxa1 32.Rc7 Bd7 33.Nf5 Qe6 34.Qxe6 Bxe6 35.Rxh7 Rxa4
>36.Rxb7
>  -+  (-2.98)   Depth: 11/32   00:01:26  51315kN
>29...R5a7 30.Nf3 g4 31.Nh4 Bxa1 32.Rc7 Bd7 33.Nf5 Qe6 34.Qxe6 Bxe6 35.Rxh7 Rxa4
>36.Rxb7
>  -+  (-2.98)   Depth: 11/35   00:02:13  81141kN
>
>--
>GCP

Chessmaster 9000, on a PIII-600, needs 0:32 to see that Bxa1 is not as good as
originally thought, 1:09 to see that R5a7 is better, and 1:27 to see that g4 may
be even better than that:

Time	Depth	Score	Positions	Moves
----	----	----	----		----
0:00	1/3	-1.49	970		29...Bxd2 30.Rc7 Bd7 31.Qxb7 Rxa4
0:00	1/3	-2.08	1639		29...Bxa1 30.Rc7 Bd7 31.Qxb7
0:00	1/3	-2.13	2946		29...Kf7 30.Rxc3 dxc3 31.Nb1
0:00	1/4	-1.85	5099		29...Kf7 30.Rxc3 dxc3 31.Nb1 c2
					32.Nc3
0:00	1/4	-2.11	7131		29...Bxa1 30.Rc7 Bd7 31.Qxb7 Rd8
0:00	2/5	-2.07	12593		29...Bxa1 30.Rc7 Bd7 31.Qxb7 Rd8
					32.Bh3
0:00	2/6	-2.47	32068		29...Bxa1 30.Rc7 Qe8 31.Rxh7 Qh5+
					32.Kg1 Qd1+ 33.Nf1
0:01	3/7	-2.13	130978		29...Bxa1 30.Rc7 Qd8 31.Qxb7 Rb8
					32.Qc6 Rxa4 33.Rxh7
0:05	3/8	-2.25	424598		29...Bxa1 30.Rc7 Qd8 31.Qc5+ Kg8
					32.Qb6 Qe8 33.Qxb7 Qh5+ 34.Kg1 Qxh6
0:12	4/9	-2.27	944211		29...Bxa1 30.Rc7 Qd8 31.Qxb7 Rb8
					32.Qc6 Rxa4 33.Rxh7 Qb6
0:32	4/10	-0.99	2487926		29...Bxa1 30.Rc7 Qd8 31.Nc4 Rxa4
					32.Rxh7 Qxb6 33.Nxb6 Ra2 34.Nxa8
					Rxa8 35.Rxb7 Bc3
1:09	4/10	-2.04	5200873		29...R5a7 30.a5 Bxa5 31.Rxa5 Rxa5
					32.Rc7 Rxb5 33.Rxe7 Rxb6 34.Rxh7
					Ra2
1:27	4/10	-2.09	6528268		29...g4 30.Kg1 R5a7 31.a5 Rxa5
					32.Rab1 Ba2 33.Nc4 Bxb1 34.Rxb1
					Ra2 35.Rc1
3:16	5/11	-1.94	15227519	29...g4 30.Rab1 Rxa4 31.Nb3 Ra3
					32.Nc5 Ba2 33.Nd7+ Qxd7 34.Qxf6+
					Kg8 35.Qg5+ Kf7 36.Qg7+ Ke6 37.Qxg4+
					Kd6

jm



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