Author: Uri Blass
Date: 15:34:27 07/20/04
Go up one level in this thread
On July 20, 2004 at 18:19:51, Uri Blass wrote: >On July 20, 2004 at 11:36:05, Omid David Tabibi wrote: > >>http://www.cs.biu.ac.il/~davoudo/pubs/ecmx.epd >> >>Remaining positions that are still unclear (the winning line is not clear): > >>4r2k/3n1Qpp/1pRP1p2/p4P2/1p1P2P1/6rP/P3q1B1/6RK w - - bm Qe6; id "ECM.624"; >>Isn't 1.Rc2 at least as good as Qe6? > >Yes >Seems that Rc2 is better than Qe6 > >>r1b2rk1/1pq2ppp/p1p1p3/2n1P3/2N2P2/3B4/PPP3PP/R2Q1RK1 w - - bm Bxh7+; id >>"ECM.677"; > >After some hours of analysis I get the following tree >Still needs to prove a win in the line of 3...f5 4.exf6 Ne4 5.fxg7 Qxg7 or maybe >there is something better for white after 3...f5 but Fritz seeems to like white >after 5...Qxg7(unfortunately it does not give main lines so it is hard to find >the reason for fail high of it) > >[Event "40'/40"] >[Site "MyTown"] >[Date "????.??.??"] >[Round "?"] >[White "New game"] >[Black "?"] >[Result "*"] >[SetUp "1"] >[FEN "r1b2rk1/1pq2ppp/p1p1p3/2n1P3/2N2P2/3B4/PPP3PP/R2Q1RK1 w - - 0 1"] >[PlyCount "27"] >[TimeControl "40/2400:0"] > >1. Bxh7+ Kxh7 2. Qh5+ Kg8 3. Rf3 Ne4 (3... f5 4. exf6 Ne4 5. fxg7 Qxg7) 4. Re1 >b5 (4... Qd8 5. Rd3 Nf6 6. exf6 Qxf6 7. Rh3) (4... g6 5. Qh6 f5 6. Rxe4) 5. >Rxe4 bxc4 6. Rh3 f5 (6... Qa7+ 7. Kf1 f5 8. exf6 Rxf6 9. Qh8+ Kf7 10. Rg3) ( >6... f6 7. Qh7+ Kf7 8. Rg3) 7. exf6 Rxf6 (7... Qa7+ 8. Kf1 Rxf6 9. Qh8+ Kf7 10. >Rg3 g6 11. Rh3 Ke7) 8. Qh8+ Kf7 9. Rg3 Qb6+ (9... Qa7+ 10. Kf1 g6 11. Rh3 Ke7 >12. Rh7+ Rf7 13. Rxf7+ Kxf7 14. f5 g5 15. fxe6+ Bxe6 16. Qh7+ Kf8 17. Qh6+ Kg8 >18. Qxe6+) 10. Kf1 g6 11. Rh3 Ke7 12. Rh7+ Rf7 13. Rxf7+ Kxf7 14. f5 * > >New game >[D]r1b2rk1/1p4q1/p1p1p3/7Q/2N1nP2/5R2/PPP3PP/R5K1 w - - 0 1 > >Analysis by Fritz 8: > >6.Ne5 Rf5 7.Qe8+ Rf8 8.Qh5 > = (0.00) Depth: 9/9 00:00:00 >6.Ne5 Rf5 7.Qe8+ Rf8 8.Qh5 > = (0.00) Depth: 9/9 00:00:00 >6.Ne5 Rf5 7.Qe8+ Rf8 8.Qh5 > = (0.00) Depth: 9/9 00:00:00 >6.Ne5 Qh7 7.Qg4+ Qg7 8.Qh5 > = (0.00) Depth: 10/24 00:00:00 604kN >6.Ne5 Qh7 7.Qg4+ Qg7 8.Qh5 > = (0.00) Depth: 11/28 00:00:02 2893kN >6.Ne5 Qh7 7.Qg4+ Qg7 8.Qh5 > = (0.00) Depth: 12/29 00:00:09 12671kN >6.Rd1! > = (0.03) Depth: 12/38 00:00:18 24781kN >6.Rd1 e5 7.Nxe5 Bf5 8.Rd4 Qh7 9.Qxh7+ Bxh7 10.h4 Rae8 11.Rd7 b6 > = (0.00) Depth: 13/37 00:00:44 60038kN >6.Rd1 e5 7.Nxe5 Bf5 8.Rd4 Qh7 9.Qxh7+ Bxh7 10.h4 Rae8 11.Nd7 Rxf4 12.Rxf4 > = (0.09) Depth: 14/41 00:02:10 177653kN >6.Rd1! > ² (0.38) Depth: 15/47 00:06:28 535175kN >6.Ne5! > ² (0.41) Depth: 15/47 00:07:48 642211kN > >(, MyTown 21.07.2004) > > >Uri now again Rd1 is the best move with even higher score 6.Ne5 Rf5 7.Qh4 Qf6 8.Qg4+ Qg7 9.Re1 Qxg4 10.Nxg4 Nf6 11.Nh6+ Kg7 12.Nxf5+ exf5 13.Rd3 ² (0.28) Depth: 16/43 00:14:56 1232016kN 6.Rd1! ² (0.31) Depth: 16/44 00:17:47 1468252kN 6.Rd1! ² (0.47) Depth: 16/44 00:20:21 1675645kN (, MyTown 21.07.2004) Uri
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