Author: Jim Monaghan
Date: 10:54:15 07/30/04
Hi, I would like some analysis help from the group with those of you with fast machines. I've posted 4 positions below in pgn format so you can simply copy and paste into your favourite engine. If you go up and down the solution tree you might spot a "hole" in the solution. My machine is simply too slow. The positions are fairly intricate. Thanks in advance. This one is a complex attack on the king. [D]5rk1/p1q1ppb1/3p2p1/3P1bBp/1pr4P/5PN1/PPPQ2P1/1KR4R b - - [Event "?"] [Site "?"] [Date "0000.??.??"] [Round "?"] [White "IQ.1027"] [Black "?"] [Result "*"] [SetUp "1"] [FEN "5rk1/p1q1ppb1/3p2p1/3P1bBp/1pr4P/5PN1/PPPQ2P1/1KR4R b - -"] 1... Bc3 2. Qe2 b3 3. axb3 (3. Nxf5 bxa2+ 4. Ka1 Rb4) 3... Ra4 4. Nxf5 (4. bxc3 Qxc3 5. bxa4 Qb3+ 6. Ka1 Qxa4+) 4... Qa5 5. Nxe7+ Kh7 6. bxa4 Rb8 7. Rcf1 Rxb2+ 8. Kc1 Rb1+ * Interesting knight sac with the BK blocked in and weak dark squares. [D]2rq1rk1/pp1bnpbp/4p1p1/3pP1N1/3P2Q1/2PB4/P4PPP/R1B1R1K1 w - - [Event "?"] [Site "?"] [Date "0000.??.??"] [Round "?"] [White "IQ.1031"] [Black "?"] [Result "*"] [SetUp "1"] [FEN "2rq1rk1/pp1bnpbp/4p1p1/3pP1N1/3P2Q1/2PB4/P4PPP/R1B1R1K1 w - -"] 1. Nxh7 Kxh7 2. Qh4+ Kg8 3. Bg5 Re8 4. Re3 Rxc3 5. Rh3 Rxd3 6. Qh7+ Kf8 7. Bf6 Nf5 8. Qh8+ * Transition to a won pawn ending. Does it work? [D]r2r4/pp3p2/4bkpp/8/7P/3B1P2/PP4P1/1K1R3R b - - [Event "?"] [Site "?"] [Date "0000.??.??"] [Round "?"] [White "IQ.1149"] [Black "?"] [Result "*"] [SetUp "1"] [FEN "r2r4/pp3p2/4bkpp/8/7P/3B1P2/PP4P1/1K1R3R b - -"] 1... Rxd3 2. Rxd3 Bf5 3. Rhd1 Rd8 4. Kc2 g5 5. hxg5+ Kxg5 6. g3 h5 7. Kc3 Rxd3+ 8. Rxd3 Bxd3 9. Kxd3 f5 10. Ke3 f4+ 11. Kf2 b5 * Another complex attack on the king. [D]1rb1r1k1/3n1ppp/p1p1p3/q3P3/7P/2N1Q1R1/PPP3P1/2KR1B2 w - - [Event "?"] [Site "?"] [Date "0000.??.??"] [Round "?"] [White "IQ.1182"] [Black "?"] [Result "*"] [SetUp "1"] [FEN "1rb1r1k1/3n1ppp/p1p1p3/q3P3/7P/2N1Q1R1/PPP3P1/2KR1B2 w - -"] 1. Rxd7 Bxd7 2. Bd3 h6 (2... g6 3. h5) (2... Rxb2 3. Kxb2 Rb8+ 4. Kc1) 3. Qf4 Kf8 4. Rxg7 Kxg7 5. Qf6+ Kf8 (5... Kg8 6. Qxh6 Re7 7. Qh7+) 6. Bg6 * The advantages appear way down the tree. The question is whether there a better defense for the weaker side along the way in each of these four cases? Are the solutions correct and unique? Please puruse the lines and post your results. Thanks, Jim
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