Author: Slater Wold
Date: 16:19:13 10/09/01
Go up one level in this thread
On October 09, 2001 at 11:24:39, Miguel A. Ballicora wrote: >On October 09, 2001 at 07:49:17, Slater Wold wrote: > >Thanks Slate. > >>1q2kb1r/1r1n1ppp/2Qpp3/8/N7/8/1PP2PPP/R1BR2K1 w - - acd 17; acn 1326517364; acs >>3606; bm Nc5; ce 344; id wcsac0055; pv Nc5 Rc7 Nxd7 Rxc6 Nxb8 Rxc2 b4 Rc8 Na6 >>Be7 b5 Bf6 Rb1 Ke7 b6 Rhd8; > >I remembered this position was a Smyslov game and I was right. Last night >I checked the "My best games" book and it was there. Smyslov-Kottnauer. >Black did not play Rc7 (played dxc5) and lost quickly. The pv is very convincing >and it does not look there is an alternative; so, this position stands. Agreed. > >>rrq1k3/2p2p2/3pb1p1/3N2Pp/p1PpPR2/P2P3P/1P6/K2Q1R2 w q - acd 18; acn 417073342; >>acs 3603; bm Rxf7; ce 398; id wcsac0145; pv Rxf7 Bxf7 Qf3 Be6 Qf8+ Kd7 Qg7+ Kc6 >>Ne7+ Kb7 Nxc8 Rxc8 h4 Rg8 Qxd4 Kc6 Rf6 Kd7 c5 Ra5 c6+ Ke7 Kb1; > >>8/3qNrpk/1bpnRpNp/pp1p1P2/3P2P1/P1P4P/1P2Q1K1/8 w - - acd 16; acn 548239247; acs >>3603; bm Nxd5; ce 325; id wcsac0216; pv Nxd5 cxd5 Rxd6 Qxd6 Qe8 Qd8 Qxf7 Qg8 >>Qxg8+ Kxg8 Ne7+ Kf7 Nxd5 Bd8 Kf3 Ke8 Ke4 Kd7 h4 Kd6; > >Nxd5 is obviously pretty good. >However, I have the feeling that there are alternatives (cooks) in this >position. My program Gaviota did not solve it in a long time, so I let it >run overnight in this position and sticks to 1.g5 with a high score >2.0 >pv was something like 1.g5 fxg5 2.Qd3 Ne4 3.Ne5 and White ended up the exchange >and a good position. > >Can you confirm this? the question is white plays 1.g5, can black find >something to save the game? Nope. After g5: W,S - Deep Junior 7 8/3qNrpk/1bpnRpNp/pp1p1PP1/3P4/P1P4P/1P2Q1K1/8 b - - 0 1 Analysis by Deep Junior 7: 1...hxg5 2.Qh5# +- (#2) Depth: 3 00:00:01 1...a4 2.gxh6 Kxh6 +- (1.58) Depth: 3 00:00:01 1kN 1...fxg5 2.Qe5 Ne4 3.Nxc6 ± (0.82) Depth: 3 00:00:01 2kN 1...fxg5 2.Qe5 Ne4 3.Nxc6 ± (0.82) Depth: 3 00:00:01 2kN 1...fxg5! ² (0.52) Depth: 6 00:00:01 20kN 1...fxg5! 2.a4 Nxf5 3.Nxc6 bxa4 4.Kh1 ² (0.37) Depth: 6 00:00:01 34kN 1...fxg5 2.Ne5 Qxe7 3.Rxe7 Rxe7 4.Qh5 Bc7 5.Qg6+ Kh8 6.f6 gxf6 7.Qxf6+ Rg7 8.Qxh6+ ± (1.39) Depth: 9 00:00:01 392kN 1...Bd8 2.gxh6 gxh6 3.a4 bxa4 4.c4 Bxe7 ± (0.74) Depth: 9 00:00:01 451kN 1...Bd8 2.gxf6 gxf6 3.Qg4 ± (1.01) Depth: 12 00:00:02 2836kN 1...Bd8 2.h4 b4 3.Rxf6 Rxe7 4.Qh5 Qe8 5.Nxe7 Bxe7 6.Qxe8 Nxe8 7.Rf7 ± (1.10) Depth: 15 00:00:16 35007kN 1...Bd8 2.Ne5 fxe5 3.g6+ Kh8 4.gxf7 Bxe7 5.Qh5 Bf8 6.Re8 Qxf7 7.Qxf7 Nxf7 8.Rxf8+ Kh7 9.Rxf7 exd4 10.cxd4 a4 +- (2.76) Depth: 18 00:02:29 305293kN 1...fxg5 2.Ne5 Qxe7 3.Rxe7 Rxe7 4.Qh5 Bc7 5.Qg6+ Kh8 6.f6 gxf6 7.Ng4 Ne4 8.Nxf6 Nxf6 9.Qxf6+ Rg7 +- (2.42) Depth: 18 00:05:23 495513kN (W, 09.10.2001) > > >>1r3r2/1b4kp/1q1p2p1/p1n1P1p1/1p2P3/7P/PPPQNNBK/R4R2 b - - acd 18; acn 623805900; >>acs 3606; bm Rxf2; ce -223; id wcsac0257; pv Rxf2 Rxf2 Nxe4 Qd4 Qxd4 Nxd4 Nxf2 >>Ne6+ Kh6 exd6 Bc8 Nc5 Bf5 Rf1 Rc8 d7 Bxd7 Nxd7 Rxc2 Kg3; >>r1q2rk1/pbpnbppp/1p6/4p3/2P5/1PQ2NP1/PB2PPBP/R2R2K1 w - - acd 20; acn 656525154; >>acs 3606; bm Rxd7; ce 442; id wcsac0325; pv Rxd7 Qxd7 Nxe5 Bf6 Bxb7 Rad8 Nxd7 >>Bxc3 Bxc3 Rxd7 Kg2 Rfd8 Kf3 h5 Kf4 Kh7 e3 g6 e4; >>2qrr1n1/3b1kp1/2pBpn1p/1p2PP2/p2P4/1BP5/P3Q1PP/4RRK1 w - - acd 15; acn >>976000576; acs 3603; bm Qh5+; ce 32748; id wcsac0398; pv Qh5+ Nxh5 fxe6+ Kg6 >>Bc2+ Kg5 Rf5+ Kg6 Rf6+ Kg5 Rg6+ Kh4 Re4+ Nf4 Rxf4+ Kh5 g3 Bxe6 Rh4#; > >This position is certainly a solid test, ends up in mate and no other >alternative can come closer (I think). Agreed. > >>r4rk1/1bp3pp/p3Pp2/1pb2P1Q/5B1N/1Pq1p1PK/P6P/R2R4 w - - acd 15; acn 226843577; >>acs 3603; bm Rd7; ce 388; id wcsac0408; pv Rac1 Qb4 Rd7 Bc8 Rxc7 Be7 Bxe3 Qa3 >>R1c5 Qxa2 Rxe7 Qxb3 Bf4 Qd3; > >I can see that this position is problematic. Rd7 is certainly the best move >when I checked it, >IIRC 1... Qxa1 2. Rxg7+ Kxg7 3. Bh6+ Kh8 4. Ng6+ hxg6 5. fxg6 and White threats >Bg7 and black cannot stop it but delaying it throwing material). >However, Rac1 is a winner too. The only problem is that I like this position >because I believe that we can see if a program has more or less problems with >horizon effects. I will check if I can modify slightly the position to avoid >the cook (I will try a white pawn in c2 rather than in a2) Ok. Becuase I believe Rac1 is a cook also. > >>r4k1r/ppp1n2p/2n2N2/4p1N1/1q1b2Q1/8/P4PPP/R1B1R1K1 w - - acd 12; acn 615027542; >>acs 3603; bm Ba3; ce 347; id wcsac0429; pv Ba3 Qc4 Nfxh7+ Rxh7 Nxh7+ Ke8 Qg7 Kd7 >>Rad1 Qxa2 Rxd4+ exd4 Nf6+ Kc8 Qf8+ Ncd8 Bxe7; >>4r2k/p2qr1pp/1pp2p2/2p1nP1N/4R3/1P1P2RP/1PP2QP1/7K w - - acd 19; acn 941499465; >>acs 3602; bm Rxg7; ce 302; id wcsac0442; pv Rxg7 Rxg7 Nxf6 Qe7 Nxe8 Rg8 Qf4 Rxe8 >>f6 Qd6 f7 Rf8 Rxe5 a5 g4 a4 Rf5 Qxf4 Rxf4 axb3; >>r2r2k1/1b2bp1p/p4npQ/1p1Pp1N1/Pnq1P3/R5N1/5PPP/1BBR2K1 w - - acd 13; acn >>1530814052; acs 1057; bm Nh5; ce 32754; id wcsac0450; pv Nh5 gxh5 Rg3 Qc3 Bd3 >>Qxd3 Rdxd3 Bf8 Nxh7+ Kh8 Nxf8+ Nh7 Qxh7#; > >The rest of the positions looks good. I will look at them again tonight. >Once we are happy with this 10 (or less if we throw out one) we can move to >another 10. >Hopefully, we can get at least 30 good clean tactical test positions that are >not extremely easy or difficult out of the 44 I selected from WCSAC. The test >"as is" with the 1000 positions is unusable. 800 positions are too easy >and there are _many_ with cooks and transpositions. Ok, sounds fine. Just let me know. > >Regards, >Miguel > > > >> >> >> >>Slate
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