Author: Howard Exner
Date: 09:31:11 03/04/98
Go up one level in this thread
On February 23, 1998 at 10:58:22, Amir Ban wrote: > >The latest installment in this best seller: Better late than never to reply. I've been tied up with home renovations. > > >No. 681 (Rxh7): > >This is a bad one: Rxh7 Qxd1+. Worse, the simple Qh2 wins easily (h5 >Be2). > >Recommend: Changed key to Qh2. Agree > > >No. 683 (Rxh2): > >I don't know about this. The continuation I analyze is 1... Rxh2 2.Kxh2 >Qh8+ 3.Kg1 Nxg4 4.Rf7 Qh2+ 5.Kf1 Qh1+ 6.Ke2 Qxg2+ (not Qxc1 7.Rf1) 7.Kd3 >Nf2+ 8.Rxf2 is unclear. > >Recommend: Drop it. Agree > > >No. 684 (Nxh7): > >I don't find a continuation for this knight sacrifice. > >Recommend: Investigate. [FEN "2rq1rk1/pp1bnpbp/4p1p1/3pP1N1/3P2Q1/2PB4/P4PPP/R1B1R1K1 w - - 0 1"] 1. Nxh7 Kxh7 2. Qh4+ Kg8 3. Bg5 Re8 4. Re3 Rxc3 5. Rh3 Kf8 * keep it > > >No. 686 (Bxh7+): > >Maybe it works but I cannot find better than a draw after 1.Bxh7+ Kxh7 >2.Qh5+ Kxg7 3.Rd1 > >Recommend: Investigate. [FEN "r2qn1k1/pb4Pp/1pn5/2p5/2P2p2/P1PB4/5PPP/R2Q1RK1 w - - 0 1"] 1. Bxh7+ Kxh7 2. Qh5+ Kxg7 3. Rad1 Qc8 4. Rfe1 Kg8 5. Rd3 Ng7 6. Qd5+ Kh7 7. Rh3+ Kg6 8. Qd6+ Kf7 9. Rh6 Qd8 10. Qg6+ Kg8 11. Rh7 Qd7 12. h4 this is a long one. > > >No. 687 (Bxh7+): > >I think it's bad: 1.Bxh7+ Kxh7 2.Nxf7 Kg6 is better than it seems, >though 3.h4 Qc6 4.h5+ Kh7 5.g6+ Kg8 6.h6 is scary. > >Recommend: Drop it. [FEN "r4rk1/pp1n1ppp/3qp3/3nN1P1/b2P4/P2B1Q2/3B1P1P/1R2R1K1 w - - 0 1"] 1. Bxh7+ Kxh7 2. Re4 Kg8 3. Rh4 Nxe5 4. dxe5 Qxe5 5. Qh5 f6 6. Qh8+ Kf7 7. Rxb7+ keep it unless there is a flaw in the above. > > >No. 693 (Bxh7+): > >1.Bxh7+ Nxh7 2.g6 Nf8 black seems fine. > >Recommend: Investigate. book missed Nf8. drop it > > >No. 698 (Bxh2+): > >It's probably bad 1...Bxh2+ 2.Kh1! and black is in trouble. > >Recommend: Drop it. yes, drop it as there are many defensive errors in the book. > > >No. 699 (Bxh2+): > >I think I see a problem here: 1...Bxh2+ 2.Kxh2 Qh4+ 3.Kg1 Bxg2 4.Kxg2 >Rc6 5.Bf4! and white holds. > >Recommend: Drop it. [FEN "3qr1k1/1br2ppp/p2b4/8/PpNp4/3P4/1PP2PPP/R1BQ1RK1 b - - 0 1"] 1... Bxh2+ 2. Kxh2 Qh4+ 3. Kg1 Bxg2 4. Kxg2 Rc6 5. Bf4 Qxf4 6. Rg1 Rf6 looks ok to keep it. > > >No. 702 (Rxg7+): > >Rxg7+ is right, but Rxf7 is just as good (Kxf7 Rf5+). > >Recommend: Add Rxf7. > > >No. 706 (Rxg7): > >There seems to be something wrong with Rxg7, but fxe6 is clearly >winning: fxe6 Bxe6 Rxf6 game over. > >Recommend: Change key to fxe6. [FEN "2r2r1k/3b1pb1/p3pp1p/q2p1P1B/8/2N2RR1/P1PQ2PP/7K w - - 0 1"] 1. Rxg7 Kxg7 2. Rg3+ Kh7 3. Bg6+ Kg7 4. Bh7+ Kxh7 5. Rh3 this mates so Rxg7 is best. > > >No. 712 (Nxg2): > >This is bad: 1...Nxg2 2.Nxb7. A nice refuation on the opposite side of >the board. > >Recommend: Drop it. yes > > >No. 718 (Rxg7+): > >How is this supposed to work ? I see: 1.Rxg7+ Bxg7 2.Rg1 Rc8 3.Bxe4 Kf8 >4.Rxg7 b3! how does white improve on this ? > >Recommend: Investigate. [FEN "r4rk1/5ppp/p2pbb2/3B3Q/qp2p3/4B3/PPP2P1P/2KR2R1 w - - 0 1"] 1. Rxg7+ Bxg7 2. Rg1 Rfc8 3. Bd4 Kf8 4. Rxg7 b3 Note the big book blunder Bd4 missing Qxc2 mate! Drop this one for sure. > > >No. 719 (Nxg2): > >I can't see anything decisive out of the key. Qe6 looks like the best >move (+108). The threat of Qg4 wins a pawn at least. > >Recommend: Change key to Qe6. [FEN "4q1k1/1b3r1p/p4pp1/1p6/2P2n2/1P3N2/1B3PPP/R2Q3K b - - 0 1"] 1... Nxg2 2. Kxg2 Rd7 3. Qc2 Qe6 4. h3 Bxf3+ 5. Kxf3 Qxh3+ 6. Ke2 Re7+ 7. Kd2 Qf3 looks like Nxg2 should be kept as best. > > >No. 722 (Rg3): > >1.Rg3 Bd7 2.Rxg7+ Kxg7 and what comes next ? > >Recommend: Investigate. [FEN "r3r1k1/p3bppp/q1b2n2/5Q2/1p1B4/1BNR4/PPP3PP/2K2R2 w - - 0 1"] 1. Rg3 Bd7 2. Rxg7+ Kxg7 3. Qg5+ Kf8 4. Qh6+ Kg8 5. Rf3 Bg4 6. Qg5+ Kf8 7. Qxg4 bxc3 8. Qh5 Looks good. > > >No. 725 (Rxg2+): > >Black can choose between two winning moves: Bh3 and Qf3, both look >better than the key. > >Recommend: Drop it. > > >No. 730 (Nxf7): > >I get Nxd7 (Nxd7 Bd6 +114). Nxf7 doesn't look less convincing. > >Recommend: Drop it. [FEN "3q1r2/1p1b1pk1/pn5p/3pN1pQ/3P3P/2r3B1/P4PP1/3RR1K1 w - - 0 1"] 1. Nxf7 Rxf7 2. Be5+ Rf6 3. hxg5 hxg5 4. Qxg5+ Kf7 5. Qh5+ Kg8 6. Rb1 the final move here is noteworthy. Keep it. > > >No. 754 (Bxf7+): > >I can't find a winning line: 1.Bxf7+ Kxf7 2.Qb3+ Ke8 3.Nd5 Bd6 > >Recommend: Investigate. drop it. Korchnoi as black made some errors in defense against Petrosian, one of my favourite players. > > >No. 758 (Bxf6): > >I am guessing that the intent is 1.Bxf6 gxf6 2.Nxf7 Kxf7 3.Qh7+ but I >don't see that this leads to a win. > >Recommend: Investigate. drop it > > >No. 762 (Nxf7): > >I don't know how this is supposed to work. E.g. 1.Nxf7 Kxf7 2.Qe6+ Kf8 >3.Bb3 Nd5. > >Recommend: Investigate. [FEN "r3r1k1/pbq1ppbp/1pp2np1/4N3/3P4/2P5/PPB1QPPP/R1B1R1K1 w - - 0 1"] 1. Nxf7 Kxf7 2. Qe6+ Kf8 3. Bb3 Nd5 4. Re3 Bf6 5. Bxd5 cxd5 6. Rh3 Kg7 7. Bh6+ Kh8 8. Qf7 Qd7 9. Re1 Very difficult. Check this line out also as I deviate slightly from the book, which gives 9.Bg5 instead but misses the reply Bg7 (only gives Bxg5?) > > >No. 764 (Nxf7): > >I have a bad position. White has three knights ? > >Recommend: Find the right position. [FEN "r2rn3/1p3pk1/p1pNn1pp/q3P3/P7/1PN4P/2QR1PP1/3R2K1 w - - 0 1"] 1. Nxf7 Rxd2 2. Qxd2 Kxf7 3. Qd7+ Kf8 4. Qxe6 Qxc3 5. g3 Qc2 6. Rd7 Qf5 > > >No. 766 (Nxf2): > >The best moves looks to be Bxh3 (Bxh3 Qh4). > >Recommend: Change key to Bxh3. [FEN "r1b1r1k1/pp2qpbp/2p3p1/2P5/3NnB2/7P/PPQ1PPB1/2RR2K1 b - - 0 1"] 1... Nxf2 2. Kxf2 Qh4+ 3. Kf3 Bxh3 4. Bxh3 Qxh3+ 5. Kf2 Qh4+ 6. Kf3 Be5 7. e3 Bxf4 8. exf4 Qh3+ 9. Kf2 Re3 Looks ok to keep Nxf2. > > >No. 767 (Bxf7+): > >This is unclear. Bxf7+ is the best move, but how does it win ? (1.Bxf7+ >Kxf7 2.Rxf5+ Kg7 3.d7 Nxd7 4.Qxd7+ Kh8). > >Recommend: Investigate. Drop it as 2. ... Kg7 was missed. > > >No. 769 (Bxf7): > >Be7+ is clearly better (Kg8 Bd6). > >Recommend: Change key to Be7+. > > >No. 799 (Nxg6+): > >Rxf5+ is better (exf5 Nd7+). > >Recommend: Change key to Rxf5+. [FEN "2b1rk2/r6p/1pP1p1p1/p2pNnR1/5Q2/P1B4q/1PP2P1P/1K4R1 w - - 0 1"] 1. Nxg6+ hxg6 2. Rxg6 Qh7 3. Qg5 This gives white a big plus. Rxf5 is also good though. Maybe two key moves here?
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.