Author: Dirk Frickenschmidt
Date: 10:14:15 09/10/98
Go up one level in this thread
On September 09, 1998 at 19:07:29, blass uri wrote: Hi Uri, > >On September 09, 1998 at 14:36:21, Dirk Frickenschmidt wrote: > >>The first loss for Junior5 in this series! >> >>One more peculiar endgame: Rebel played strong the whole game, but after Junior5 >>had double rooks on white's 2nd row, I thought the thing could possibly become a >>draw. But no way: Rebel9 brought this home in a very tough and patient way: >> >>Rebel9 - Junior5 [C06] >>40/120 Wuppertal, 09.09.1998 >>[DF] >> 44096kB, jun-book.ctg=351287 pos >>1.e4 e6 2.d4 d5 3.Nd2 Nf6 4.e5 Nfd7 5.Bd3 c5 6.c3 Nc6 7.Ne2 cxd4 8.cxd4 f6 >>9.exf6 Nxf6 10.Nf3 Bd6 11.0-0 Qc7 12.Bg5 0-0 13.Rc1 Ng4 14.Ng3 g6 15.Nd2 aus dem >>Buch 15...Nf6 16.Nb3 e5 17.dxe5 Bxe5 18.Qd2 Qb6 19.Be2 Qb4 20.Rfd1 a5 21.Bf3 >>Qxd2 22.Rxd2 a4 23.Nc5 Nd4 24.Bd1 Ne6 25.Nxe6 Bxe6 26.Bf3 Ra5 27.Re1 Nd7 28.Ne2 >>Re8 29.Nf4 Bxf4 30.Bxf4 Kf7 31.Bd6 Rb5 32.Ba3 Nb6 33.Rd4 Nc4 34.h4 Nxa3 35.bxa3 >>Re7 36.Rxa4 Rb2 37.Rd1 Kf6 38.Bxd5 Bxd5 39.Rxd5 Re1+ 40.Kh2 Ree2 41.Rd7 Rxf2 >>42.Rg4 h5 43.Rd6+ Ke5 44.Rgxg6 Rfc2?? > >Junior5 missed a simple draw by 44...Rxg2+ >Junior5 could find it if it had more time(10 minutes per move was enough) but >other programs like Genius or Fritz5 can find 44...Rxg2+ in 0 seconds. >Junior5 believed that in pawn endings a pawn advantage is a big advantage >It is right in most of the times but not in this position. > >Uri Thanks for the hint, Uri! You are completely right. I missed this in fast replay the in the morning after the game. I guess this position is a very valuable testing position for Amir and Shay to recheck the Junior5 endgame/hash tables. Junior gets the right track finally after manually playing 4...Rxg2 45.Rxg2 Rxg2 46.Kxg2 Kxd6. Even then it still needs about 1'40 (don't remember the exact seconds) on my 200MMX (while Fritz5 gets a 0.00 evaluation *very* fast). So that's definitely too slow to find the draw in the critical position. Since Junior5 is very fast in many other middlegame and endgame positions, perhaps Amir and Shay find a way to make it faster in this one? I guess they will appreciate the hint. Thanks again for replaying, Uri. Kind regards from Dirk
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