Author: Anthony Cozzie
Date: 15:24:32 02/17/03
Go up one level in this thread
On February 17, 2003 at 17:57:53, Art Basham wrote: >Here black plays the simple Rf6... >then Rg6, and then later Rg4....and of course wins...! >...(If white tries to play h4, etc, Rxh4 mates).. > >[D]5rk1/1p1r2p1/1Qp1p2p/2P4q/3P3P/2R1PbP1/PP3P2/5RK1 b - h3 0 4 > >There may be other ways to win, but I wonder if any computer program >finds....Rf6..? 1...Be2 2. Rcc1 Qg4 3. Kh2 Bxf1 4. Rxf1 Rdf7 5. Kg2 = (3.25) Depth: 10 00:00:06.92 1122kN 1...Qg4 2. Kh2 Bd5 3. Ra3 Qe2 4. Kg1 Rxf2 5. Ra1 + (3.75) Depth: 11 00:00:11.48 1986kN 1...Qg4 2. Kh2 Bd5 3. Qa7 Qf3 4. e4 Qxe4 5. f3 Qe2 6. Kg1 Qxb2 7. Ra3 = (3.98) Depth: 11 00:00:14.99 2572kN 1...Qg4 2. Kh2 Bd5 3. Qa7 Qf3 4. e4 Qxe4 5. f3 Qe2 6. Kg1 Qxb2 7. Ra3 Bc4 + (4.48) Depth: 12 00:00:17.17 2972kN 1...Qg4 2. e4 Qh3 3. Rxf3 Rxf3 4. Qb4 Rd3 5. Qa5 Kh7 6. Qa8 Rf3 = (4.39) Depth: 12 00:00:45.13 7641kN 1...Be4 2. Qb3 Qg4 3. Kh2 Qf3 4. Qxe6 Rdf7 5. Qh3 Qe2 6. Rc4 Qxc4 7. g4 + (4.89) Depth: 13 00:01:24.99 14728kN 1...Be4 2. Qb3 Qg4 3. Kh2 Qf3 4. Qxe6 Rdf7 5. Qxe4 Qxe4 6. f4 Rb8 7. a3 b6 8. cxb6 = (5.96) Depth: 13 00:02:23.50 24908kN Be2, Qg4, and Be2 all appear to win. Zappa believes Be4 is the most precise. After forcing Rf6: 1. e4 Bxe4 2. Re3 Qg4 3. f4 Rxd4 4. Qxb7 Qh3 5. Qc8 Rf8 6. Qa6 = (-2.87) Depth: 11 00:00:30.79 6299kN 1. e4 Qg4 2. Kh2 Qxe4 3. Qb3 Bh1 4. Rd1 Rxf2 5. Kh3 - (-3.37) Depth: 12 00:01:18.46 16161kN 1. e4 Qg4 2. Kh2 Qxe4 3. Re3 Qxd4 4. Qb3 Qg4 5. Rg1 Kh7 = (-3.49) Depth: 12 00:01:37.31 20292kN I think you underestimated the ability of computer programs to throw away pieces to avoid mate. Black wins of course, but not immediately. Or I didn't let Zappa run long enough :) anthony
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