Author: Peter Berger
Date: 10:00:26 09/23/01
Go up one level in this thread
On September 23, 2001 at 11:28:19, Miguel A. Ballicora wrote: >On September 23, 2001 at 08:54:02, Gian-Carlo Pascutto wrote: > >>On September 23, 2001 at 05:29:51, Peter Berger wrote: >> >>> >>>2b3k1/p4ppp/7q/2Q5/8/P3r1P1/1r4BP/R3R1K1 b - - bm Bb7; id "ECM.1197"; >>> >>>This one looks wrong. >> >>Nope...Bb7 is the fastest mate. > >I see that both (Rxg2 and Bb7) ends up in checkmate or huge advantage. I do not >think it is a good idea to have this kind of test. Once a program finds a mate >it might stick to it. That does not change at all the strength of a program. In >other words, this position does not test any improvement in stregth IMHO. >I would take it out. Bringer confirms the faster mate with more time - I think this position is a little pointless but both decisions make sense: 0:00:21.4 (11/34) 6371918 18.32 1...Rxg2+ (Mat=-440,50=0) 0:01:32.8 (11/40) 26569158 Matt in 10 1...Rxg2+ (Mat=-440,50=0) 0:06:19.9 (11/40) 103276783 Matt in 9 1...Bb7 (Mat=-100,50=1) > >>>2r1r1k1/pp1nbpp1/4pn1p/q3NN1P/P1pP1B2/2P5/1PQ2PP1/R3R1K1 w - - bm Nxg7; id >>>"ECM.1227"; >>> >>>I think Bringer's solution here is even prettier than the original one ;-) >>> >>>0:00:44.1 (13/40) 12455642 0.00 1.Nxd7 Nxd7 2.Rxe6 >>> >>>Both lead to a forced draw as far as I can see - or is there some hidden win >>>after Nxg7 ? > >White must win here! not a draw! >I am 99% sure that this position is Gaprindashvili - Nikolac. I studied this >game when I was very active and studying chess a lot. I got to be early 80's >or late 70's. I do not have here my collection of informants, otherwise I will >find it because it was in one of those. It was a caro-kann. I might be wrong >but the position was burned in my retina. White won destroying the king >side with Nxg7 and Bxh6+. It looks devastating. >I will try to look at it. >Maybe somebody can find this game? That'll be easier. Yes - it seems this one is a clear win : 1.Nxg7 Kxg7 2.Bxh6+ Kg8 3.Re3 Nxe5 4.de Bf8 5.Rg3+ Kh8 6.Bxf8 Rxf8 7.exf6 Qe5 8.Rg7 Qxh5 9.Qe4 Qh6 10.Rg3 Rg8 11.Qxb7 Rxg3 12.Qxc8+ Rg8 13.Qxc4 Qxf6 14. Rd1 +- Pretty lines start with 2...Kxh6 but look easy for a chessprogram. > >>>r1b2r1k/ppppq1pp/2n1n3/6N1/2B2P2/4B3/PPP3PP/R2Q1RK1 w - - bm Nxh7; id >>>"ECM.1612"; >>> >>>I don't really understand this position. 1.Nxh7 Kxh7 2.Qh5+ Kg8 3.f5 Ne5 4.Bb3 >>>Qe8 5. Qh4 probably ? > >Why Bb3? >4.fxe6! I think is a good move!. >4.fxe6 Nxc4 5.Rxf8 Qxf8 6.Rf1 Qe7 7.Qf7+ Qxf7 8.exf7 Kf8 9.Bd4 and white is won >next move is Bxg7+ with a short mate soon. >sounds like a crushing PV. > Confirmed, I didn't see 4.fxe6! . The Black could try 6...Rxf1+ 7.Kxf1 Nxe3 8.Ke2 dxe6 9.Qe8+ but this is simply dead. > >>>Nice position. 1.Bxe6 dxe6 2.Qd3 g6 3.Rad1 - nice position,too. 1.Qh5 g6 2.Qh6 >>>Qg7 3.Qxg7+ etc as Crafty suggested - not bad either. >>>Is there some original analysis availlable explaining it? >> >>I eliminated this one. White seems to have multiple good moves. > >I would not eliminate this one (at least not yet). The PV I gave above sounds >too good. A quick check with Gaviota, starting from the position after fxe6 >seems to confirm it. > >Regards, >Miguel > That leaves only ECM.1134, ECM.1426 and ECM.1527 to be discussed. Any takers? Cheers. pete
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