Author: Slater Wold
Date: 20:48:02 02/06/01
Go up one level in this thread
On February 06, 2001 at 09:58:57, Jon Dart wrote: >A few more test positions from Arasan games: > >r1b2rk1/pp3pp1/4p2p/2ppP1b1/3Pq3/2P1PNP1/PP2Q2P/R3KB1R w KQ - bm Nxg5; id >"arasan2.19"; >rnb2rk1/pp2bpp1/2ppp1qp/4P3/3P4/2NB1N2/PPPQ1PPP/2KR3R b - - bm f5; id >"arasan2.20"; >1r4k1/p2R1pp1/4p2p/3b4/1P2q3/P4N2/5PPP/3Q2K1 b - - bm Qg6; id "arasan2.21"; >1r5k/p5qp/2pr4/3p1p2/1P1Pn1p1/P2B4/2R1RPPP/2Q3K1 w - - bm Bxe4; id "arasan2.22"; >2r1rbk1/1pq2p1p/2b1pPp1/3pP3/p1pP2P1/P1P2NQ1/1PB4P/1R2R1K1 w - - bm Ng5; id >"arasan2.23"; > >The last one is an example of why computers shouldn't play the French: > >[D] 2r1rbk1/1pq2p1p/2b1pPp1/3pP3/p1pP2P1/P1P2NQ1/1PB4P/1R2R1K1 w - - > >White probably has more than one way to win (in the game, he played h4) but Ng5! >appears to be most decisive. Another question, though: do any programs realize >at this point (before they see the tactics) that Black is in a very bad way, >with his Queen several other pieces locked out of the action, and his King, if >not now unsafe, about to be put in danger? I let Fritz 6e be black, and I played the move you recommended (Ng5). This is what fritz thought, after 4:22 minutes of thinking. Wold,S - Fritz 6 2r1rbk1/1pq2p1p/2b1pPp1/3pP1N1/p1pP2P1/P1P3Q1/1PB4P/1R2R1K1 b - - 0 1 Analysis by Fritz 6: 1...Qxe5-- +- (5.28) Depth: 1/3 00:00:00 1...Qxe5-- 2.Qxe5 +- (8.03) Depth: 1/3 00:00:00 1...Bxa3! +- (4.94) Depth: 1/3 00:00:00 1...Bxa3! 2.bxa3 +- (3.00) Depth: 1/3 00:00:00 1...Bg7! +- (2.78) Depth: 1/4 00:00:00 1...Bh6! +- (2.59) Depth: 1/4 00:00:00 1...Bh6! = (0.09) Depth: 1/4 00:00:00 1...Bh6 2.Nf3 = (0.09) Depth: 2/5 00:00:00 1...Bh6-- ² (0.59) Depth: 3/6 00:00:00 1...Bh6-- ² (0.59) Depth: 3/6 00:00:00 1...Red8! ² (0.56) Depth: 3/8 00:00:00 1...Red8! 2.Qh4 h6 = (0.09) Depth: 3/12 00:00:00 1...Red8 2.Qh4 h6 3.Nf3 = (0.09) Depth: 4/9 00:00:00 1...Red8-- ² (0.41) Depth: 5/11 00:00:00 2kN 1...Red8-- 2.Bxg6 hxg6 3.Qh4 Bd6 4.Qh7+ Kf8 5.exd6 Rxd6 ² (0.59) Depth: 5/11 00:00:00 2kN 1...h6! ² (0.56) Depth: 5/11 00:00:00 3kN 1...h6! 2.Nf3 = (0.12) Depth: 5/11 00:00:00 4kN 1...h6 2.Nf3 b5 3.g5 Bb7 4.gxh6 Bxh6 = (0.19) Depth: 6/10 00:00:00 8kN 1...h6 2.Nf3 b5 3.g5 hxg5 4.Nxg5 Bb7 5.Rf1 ² (0.34) Depth: 7/17 00:00:00 22kN 1...Kh8! ² (0.31) Depth: 7/23 00:00:00 39kN 1...Kh8 2.Qh4 h6 3.Nf3 Kg8 4.g5 h5 5.Rf1 ² (0.59) Depth: 8/17 00:00:00 63kN 1...h6! ² (0.56) Depth: 8/17 00:00:00 67kN 1...h6! 2.Nf3 b5 3.g5 h5 4.Qh4 Bb7 5.Rf1 ² (0.41) Depth: 8/17 00:00:00 87kN 1...h6-- ± (0.72) Depth: 9/20 00:00:00 177kN 1...h6-- 2.Bxg6 hxg5 3.Bc2 Bg7 4.fxg7 Kxg7 5.Qf3 Kg8 ± (0.87) Depth: 9/20 00:00:00 194kN 1...Kh8! ± (0.84) Depth: 9/20 00:00:00 235kN 1...Kh8! 2.Qh4 h6 3.Nf3 Kg8 4.g5 h5 5.Rf1 Red8 ² (0.59) Depth: 9/20 00:00:00 258kN 1...Kh8-- ± (0.91) Depth: 10/21 00:00:00 365kN 1...Kh8-- 2.Nxh7 Kxh7 3.Qh4+ Kg8 4.Re3 Qxe5 5.Rxe5 Bd6 6.Qh6 +- (6.00) Depth: 10/31 00:00:00 521kN 1...Qb6! +- (5.97) Depth: 10/31 00:00:01 603kN 1...Qb6! 2.Nxh7 Bh6 3.Qh3 Bd2 4.Rf1 Red8 5.Rbd1 Be3+ 6.Qxe3 +- (1.69) Depth: 10/31 00:00:01 891kN 1...Bh6! +- (1.66) Depth: 10/31 00:00:01 975kN 1...Bh6! 2.Nxh7 Kxh7 3.Qh4 Rh8 4.g5 Kg8 5.gxh6 Kh7 6.Rf1 ± (1.00) Depth: 10/31 00:00:01 1048kN 1...Bh6 2.Nxh7 Kxh7 3.Qh4 Rh8 4.g5 Kg8 5.gxh6 Kh7 6.Rf1 ± (0.97) Depth: 11/23 00:00:02 1430kN 1...Bh6-- ± (1.28) Depth: 12/21 00:00:03 2150kN 1...Bh6-- 2.Qh4 Bxg5 3.Qxg5 Qe7 4.fxe7 Rc7 5.Qf6 Rexe7 6.Rf1 +- (9.25) Depth: 12/27 00:00:03 2479kN 1...h6! +- (9.22) Depth: 12/27 00:00:03 2526kN 1...h6! 2.Bxg6 fxg6 3.f7+ Kh8 4.fxe8R Rxe8 5.Nh3 Qg7 6.g5 +- (1.59) Depth: 12/28 00:00:04 2925kN 1...h6 2.Bxg6 fxg6 3.f7+ Kh8 4.fxe8R Rxe8 5.Nh3 Bg7 6.g5 +- (1.62) Depth: 13/26 00:00:09 6336kN 1...h6 2.Bxg6 fxg6 3.f7+ Kh8 4.fxe8Q Rxe8 +- (1.62) Depth: 14/28 00:00:18 12561kN 1...h6 2.Bxg6 fxg6 3.f7+ Kh8 4.fxe8Q Rxe8 5.Nh3 Bg7 6.g5 +- (1.72) Depth: 15/31 00:00:34 24222kN 1...h6 2.Bxg6 fxg6 3.f7+ Kh8 4.fxe8R Rxe8 5.Nf3 Bg7 6.g5 +- (1.69) Depth: 16/36 00:01:13 51694kN 1...h6 2.Bxg6 fxg6 3.f7+ Kh8 4.fxe8Q Rxe8 +- (1.69) Depth: 17/38 00:02:17 95207kN 1...h6 2.Bxg6 fxg6 3.f7+ Kh8 4.fxe8R Rxe8 5.Nf3 g5 6.Rf1 +- (1.62) Depth: 18/41 00:04:22 180887kN (Wold, Houston 06.02.2001) It knew right off, it was in trouble. But after only 2 seconds of thinking, like you said, started to see tactics to make the position more tolerable. I'd be interested to see if Fritz could draw this ugly position, as black. Slate
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