Author: Dirk Frickenschmidt
Date: 02:55:23 05/17/98
In CBM 63, in the 'Fritz forum', I found a nice game illustrating king security problems. Fritz5,P (2500) - Golubev,M (2520) [E98] Sparkassen Open rapid (7), 1998 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 0-0 6.Be2 e5 7.0-0 Nc6 8.d5 Ne7 9.Ne1 c5 10.dxc6 bxc6 11.b4 d5 12.Bg5 d4 13.Bxf6 Bxf6 14.Na4 Bg7 15.Nc5 h5 16.f4 exf4 17.Ned3 h4 18.Rxf4 a5 19.b5 cxb5 20.cxb5 a4 21.Rb1 Bh6 22.Rf1 Be3+ 23.Kh1 f5 24.Bf3 fxe4 25.Bxe4 Nf5 The critical position. On rapid chess level Fritz5 did not see the danger for white fast enough and lost the game. I had a look at this position on a Pentium 200MMX/48MbHash. *Fritz5* needs about 7 minutes to 'smell' the danger of being mated and switches to 26. b6 This looks sufficient to me to keep a decisive advantage. Black seems to find no hole to cause big white problems. After more than 14 minutes Fritz5 preferred 26.g4! forcing black to put the cards on the table immediately. The black mate attack does not work in this case, and there are no tactical chances left to him this way: 26.g4 Ng3+ (26...hxg3 27.Bxa8 Qh4 28.Rb2 Bf2 29.Rbxf2 gxf2 30.Rxf2 Ng3+ 31.Kg1 Rxf2 32.Nxf2) 27.hxg3 hxg3 28.Rxf8+ Qxf8 29.Kg2 [Fritz, checked by Schulz,A] *Junior 4.6* (same configuration) smelled the mating dangers even faster in this case: After 2'30 it saw big problems for white taking on a8, after 3'20 it switched to b6. It did not switch to g4 or anything else within 15 minutes. The Fritz5 rapid game ended this way: 26.Bxa8 Ng3+ 27.hxg3 hxg3 28.Rxf8+ Qxf8 29.Bd5+ Kh8 30.Qh5+ [30.Bf3 Qh6+ 31.Bh5 Qg5 and mate in 4 (Schulz,A)] 0-1 The whole thing is a nice example concerning king safety issues. Maybe I will post some more results from other programs concerning this position. In the meantime all of you who like testing could post the results *you* get. How do all the other programs manage to handle these positions? Kind regards from Dirk
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