Author: Daniel Jackson
Date: 10:00:10 07/09/04
Go up one level in this thread
On July 09, 2004 at 10:11:52, Anthony Cozzie wrote: >On July 09, 2004 at 09:37:20, Daniel Jackson wrote: > >>The Uzbekistani GM was low on time and had played a very incautious move (Rd6). >>After checking the lines for a few minutes Adams struck out: 31.Rxb4! axb4 >>32.Ne7+ Qxe7 33.Qxd6. Now instead of defending the b-pawn (with 33...Qxd6 >>34.Rxd6 Rb8 or even 33...Qe4) Kasimdzhanov went for 22...Qe2 after which Adams >>could pick up the second pawn with 34.Rd4 h5 35.Qxb4. Everone expected Black to >>resign, but Kasimdzhanov fought on desperately until the time control and a few >>moves after that. 35...Qf3 36.h4 Rc8 37.Qd2 Rc3 38.Rf4 Qc6 39.Kh2 Rxb3 40.Qd8+ >>Kh7 41.Qd1 Rb7 42.Qxh5+ Kg8 43.Rd4 Qf6 44.Rd2 Ra7 45.a5 g6 46.Qb5 Kh7 47.Qb6 >>1-0. >> >>A resulting position had Kasimdzhanov exchanged Queens and played 34..Rb8. >> >>The play that would have ensued, 35.Rd5!..Kf8. Does your engine find (36.Rb5!!)? >> >>[D]1r3k2/5ppp/8/3R4/Pp6/1P4P1/5P1P/6K1 w - - 0 36 >> >>Daniel > >It looks like Black will be in zugzwang after Rb5 Rxb5 axb5 Ke7 Kf1 Kd6 Ke2 Kc5 >Kd3 Kxb5 Kd4, but it depends who gets the move after the pawn pushes on the >kingside. > >I would play Rd7 in blitz and expect to win easily. White would win the b-pawn >long before black could extricate his king. > >anthony Rd7 certainly wins, and computers would choose that move, is my guess, I know S8 does. I haven't tested my other programs. S8 will first look at Rd5 a move earlier then switch to Rd7. Rd5! and Rb5! are "Human" moves, and lead to the simplest win. Computers focus on what is the highest value returned, unless there is specific "knowledge" to tell them otherwise. In blitz many people would play Rd7 as it's clear, it wins. However, with experience, people are still likely to play Rd5! and Rb5! winning the ending after Rooks come off the board. Years ago Rd7 would have been my choice as well, today Rd5! with the idea Rb5! and winning the ending appears first in my mind, so even at blitz I would play it. You said, "It looks like Black will be in zugzwang after Rb5 Rxb5 axb5 Ke7 Kf1 Kd6 Ke2 Kc5 Kd3 Kxb5 Kd4, but it depends who gets the move after the pawn pushes on the kingside." Now look at the position. How can Black's K-Side pawns ever hope to defeat White's? Of course Black is in zugzwang. You don't need to calculate it, to realize this. [D]8/5ppp/8/1k6/1p1K4/1P4P1/5P1P/8 b - - 0 41 This is something that remains untouchable by computers, intuition. When programs can emulate that, then machines will take our last refuge in supremacy at chess. Daniel
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