Author: Joachim Rang
Date: 06:44:08 03/03/04
[D]rnbqk2r/1p3ppp/p7/1NpPp3/QPP1P1n1/P4N2/4KbPP/R1B2B1R b kq - 0 1 Nolot's analysis as reported by Baudot: Malaniouk - Ivantchouk, Moscow 1988 13... axb5!! offers a rook to keep the white queen out of play. 14.Qxa8 Bd4 15.Nxd4 cxd4 16.Qxb8 0-0! 17.Ke1 Qh4 18.g3 Qf6 19.Bf4 g5? (Ivantchouk would have won much faster had he found 19...d3!, a move he found during the analysis. Tasc R30 inds 19...d3! in 2 1/2 hours. But to find 13...axb5 it would probably need a couple of centuries...) 20.Rc1 exf4 21.Qxf4 Qd4 22.Rd1 bxc4 23.e5 Qc3+ 24.Rd2 Re8 25.Bxd3 cxd3 26.0-0 Nxe5 -+ Last minute info from Pierre, 19...Bf5!! is even stronger than d3 What does DT think about move 19 for black, and in how much time, asks Pierre.* Comments by Feng-Hsiung Hsu: Ivanchuk played 1. ... ab5! which appears to be a sound positional sacrifice. Calling this position a tactical one, however, is a little unfair on Pierre's part. Ivanchuk, by the way, could not find the best continuations over the board, but won it anyway due to Melaniuk's inaccurate defence. Could not solve it in one hour. Probably a home preparation. The same move was replayed 3 years later in some random tournament. Later omments by Feng-Hsiung Hsu: First, 19. ... Bf5 was played instantly (at 6 ply) by both DT-1 and DT-2, and within 30 seconds, both thought that black is winning big. A interesting line is instead of playing 17. Ke1 as in the game, playing 17. c5!?. Black's attack looks menacing, but there is no obvious win. 13. ... ab5!! seems clearly the best move in the position, even though Ivanchuk did not see all the complications over the board, and we cannot establish that it necessarily wins. It probably would tie down the machine for a few days to find the move. Perhaps we will try it sometime later. ----------------------------------------------------------------------------- I let Shredder 8 analyze this position for 64 hours on an AMD 64 3000+, but unfortunately it was not able to find the correct move. Perhaps it will find it on iteration 26 which I had to abort. Fritz 8 on the other hand find's axb5 almost instantly, although with a plus-score for white. I do not know whether they hardcoded something about that position in Fritz. No other engine I tried found axb5 in a few hours. After a little analysis, it seems, that most program can see the win for black after 13... axb5!! 14.Qxa8 Bd4 the line with 15. Nxd4. But after 15. Ra2 neither Shredder nor Fritz return an advantage for black in at least 24 hours (on Athlon 1500 MHz). Can some expert show some Variations after 15. Ra2 how black can achieve advantage? Thanks in advance regards Joachim
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