Author: Sune Larsson
Date: 02:01:22 06/22/01
Go up one level in this thread
On June 21, 2001 at 23:45:21, Dann Corbit wrote: >On June 21, 2001 at 17:15:59, Sune Larsson wrote: > >> >> [D]4k2r/rp5p/pR4p1/4qp2/3pp1PQ/8/2P4P/R5K1 w k - 0 28 >> >> >> This position is from IM Berg-GM Hector, Sigeman tournament - Malmo. >> These two very tactical skilled Swedes had battled it out just like >> old masters did in the 19th century. Young Emanuel Berg sacked one >> pawn after another but, as it looked, in vain. Now, all good stories >> give some glory to the brave one and that is also what happened here. >> In the above position white, 4 pawns less, has the resource 28.Ra5!! - >> with the point 28.-Qxa5 29.Qf6! (not 29.Re6+ Kd7). At the present >> moment it looks like this 28.Ra5!! is good enough to draw the game >> for white. >> >> >> Test 1: Can your program find the move 28.Ra5!! - evals? > >It's a terrible [definitely losing] blunder, throwing away the rook for no >compensation: No, no, no Dann! After 28.Ra5!! Qxa5 I gave the move *29.Qf6!*, not the terrible (yes!) 29.Rxg6?? After 28.Ra5!! Qxa5 29.Qf6, white's threats are so strong that the present GM opinion is that black probably has to settle for a draw with something like: 29.-Qe1+ 30.Kg2 Qe2+ 31.Kg1 Qxg4+ 32.Kh1 Qd1+ 33.Kg2 Qxc2+ 34.Kg1 Qd1+ 35.Kg2 and black has perpetuals. > >[D] 4k2r/rp5p/pR4p1/R3qp2/3pp1PQ/8/2P4P/6K1 b k - acd 15; acn 532177870; acs >1000; ce 1126; pv Qxa5 Rxg6?? hxg6 Qxh8+ Kf7 Qxd4 Qe1+ Kg2 Qe2+ Kg1 Qxg4+ Kf1 Qf4+ >Kg2 Ra8 Qd5+ Kf8 c4 Qf3+ Kg1 Qe3+ Kg2 Qe2+ Kg1 Ra7; This is a very bad variation. As stated above, the correct move for white is 29.Qf6! not 29.Rxg6?? > >> >> Test 2. After 28.Ra5!! Qxa5 can your program find 29.Qf6! - evals? >> >> >> In the game Hector chose 28.-Qg7 which resulted in a draw. See further down. >> >> >> Sune >> >> >> >>[Event "Sigeman & Co"] >>[Site "Malmoe SWE"] >>[Date "2001.06.18"] >>[Round "7"] >>[White "Berg, E."] >>[Black "Hector, J."] >>[Result "1/2-1/2"] >>[ECO "C34"] >>[WhiteElo "2474"] >>[BlackElo "2546"] >>[PlyCount "85"] >>[EventDate "2001.06.12"] >> >>1. e4 e5 2. f4 exf4 3. Nf3 Nf6 4. e5 Ne4 5. d4 d5 6. Bxf4 c5 7. Bd3 Qb6 8. O-O >>cxd4 9. Nbd2 Bf5 10. Nb3 Bc5 11. a4 a6 12. a5 Qa7 13. Nxc5 Qxc5 14. b4 Qxb4 15. >>Bc1 Nc6 16. Ba3 Qxa5 17. Bf8 Qc7 18. Bxe4 Bxe4 19. Bd6 Qd7 20. Ng5 f6 21. Nxe4 >>dxe4 22. Qh5+ g6 23. Qh4 f5 24. g4 Qe6 25. Rfb1 Ra7 26. Rb6 Nxe5 27. Bxe5 Qxe5 >>28. Ra5 Qg7 29. Re6+ Kd7 30. Rae5 Kc8 31. Re8+ Rxe8 32. Rxe8+ Kd7 33. Qd8+ Kc6 >>34. Re6+ Kc5 35. Qb6+ > >OOPS! This one is a little less obvious. It's even more devastating than the >evaluation shows (of course, I'm no chess genius, so I might be wrong). And yet >I am sure that this move (Re7 instead of Qb6+) wins: Here I agree that 35.Re7 looks very interesting. I think we can presuppose severe time trouble...;) > >[D] 3Q4/rp4qp/p3R1p1/2k2p2/3pp1P1/8/2P4P/6K1 w - - acd 14; acn 644893273; acs >1001; ce 423; pv Re7 Qxe7 Qxe7+ Kc6 Qe8+ Kb6 Qd8+ Kc6 Qb8 d3 cxd3 Kb6 Qd6+ Kb5 >Qd5+; > > >>Kc4 36. Qb3+ Kc5 37. Qb6+ Kc4 38. Qxa7 Qh6 39. Qxb7 Qe3+ >>40. Kf1 Qf3+ 41. Kg1 Qxg4+ 42. Kf1 Qd1+ 43. Kg2 1/2-1/2 > > >In short, both players had it won. Both passed it up and ended with a draw. >But all in all, the most entertaining game I have seen in months. I intend to >analyze the whole thing in painstaking detail. That will be interesting! Sune
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