Author: Slater Wold
Date: 16:46:27 09/01/01
[D]3r3k/2qNb1r1/1p2pn2/pBpbNp2/Q2P1Pp1/P3P3/1PR3P1/2R2K2 b - - What is the correct move here? Had you asked Deep Thought back in 1989, it would say 33...Be4. However I could not get Deep Shredder to see this move in any reasonable amount of time. (10+ minutes.) But is it correct? Well, considering 33...Be4 leads to 34. Rd2 Nd5 35. Re2, then YES, it would be correct. However, are there other moves to stop this? Well at depth 12, and 5+ minutes into evaluation, Deep Shredder would play 34. Rd2 after 33...Be4. That leaves us with: [D]3r3k/2qNb1r1/1p2pn2/pBp1Np2/Q2PbPp1/P3P3/1P1R2P1/2R2K2 b - - This move seems pretty difficult to get also. Deep Shredder looked at Bd5 up to ply 11, and then changed to Rh7 after 2:44 minutes, scoring itself up +0.25. After 4:36 minutes, it scores Rh7 as +0.47. Nd5 secures a little more position, and leads to: [D]3r3k/2qNb1r1/1p2p3/pBpnNp2/Q2PbPp1/P3P3/1P1R2P1/2R2K2 w - - There are several moves that are possible here. From Qb3, Kg1, Re2, Re1, however all are losing. After 3+ minutes, Deep Shredder plays Kg1, scoring itself down -0.58. However, the move that was played, was Re2. I will follow through with the move that was played originally: [D]3r3k/2qNb1r1/1p2p3/pBpnNp2/Q2PbPp1/P3P3/1P2R1P1/2R2K2 b - - Now it becomes clear what moves are best. Deep Shredder scored this +1.41 for itself in 0:00 seconds. After 31 seconds, it drops to +1.16. What about what Shredder wanted earlier, Kg1, would that have saved it? No, it still plays Rh7, and the score is even worse. (Which makes me wonder, how did it think Kg1 was better!) After this, it is a clear win for black. But how did this happen? At move 33 Deep Shredder says that Nxd7 is best, and thinks it's winning by a little over 0.30. Playing a better 33...Be4! and 2 moves later it's +2.00?! With Be4, and a forced Rd2, we know that there is no good response to Nd5 or Rh7, and it's a clear win for black!. This is only 2 moves away! This seems baffling to me, and I hope someone can help explain. 33..Be4 only has one response. And we know after 34. Rd2 it's a simple win for black. So why can't any programs find it? It seems simple. Nxd7 is not the correct move, as it just exchanges pieces, and gives white a better chance to draw. Be4 is winning, clearly. QUESTION: In this postiton, who can find 33...Be4! And find it in a tournament time? (3-5 minutes) [D]3r3k/2qNb1r1/1p2pn2/pBpbNp2/Q2P1Pp1/P3P3/1PR3P1/2R2K2 b - - Here is Deep Shredder eval: position: 10.01 0:01 +0.38 1...Nxd7 2.Bxd7 Qxd7 3.Qxd7 Rxd7 4.Nxd7 cxd4 (474.972) 467.4 11.01 0:02 +0.38 1...Nxd7 2.Bxd7 Qxd7 3.Qxd7 Bxg2+ 4.Rxg2 Rxd7 5.Nxd7 e5 (1.204.841) 478.8 12.01 0:06 +0.38 1...Nxd7 2.Bxd7 Qxd7 3.Nxd7 Rxd7 (3.187.564) 477.7 13.01 0:30 +0.38 1...Nxd7 2.Bxd7 Qxd7 3.Qxd7 Rxd7 4.Nxd7 Bh4 5.dxc5 Bf3 6.gxf3 (13.921.049) 460.6 best move: Nf6xd7 time: 5:12.688 min n/s: 445.376 CPU 199.3% nodes: 139.263.904 Thanks. And good luck! Slate
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