Author: Dann Corbit

Date: 10:24:02 04/12/01

Go up one level in this thread

On April 12, 2001 at 10:45:23, Alex Szabo wrote: >What is the accepted list of corrections to the "Win at Chess" problems? > >Here's my list; can anyone suggest additional corrections (or corrections >to my corrections)? > >------------------------------------------------------------------------------ > > Corrections and Notes to Fred Reinfeld's 300 "Win at Chess" Problems > > Compiled by Alex Szabo (alex@accesswest.com) on 12 April 2001 > >------------------------------------------------------------------------------ > > C O R R E C T I O N S > > Problem Solution Change Comment > ======= =============== ======= > > #22 Bc4-a2 additional solution Agree. > > #31 d5xe6 additional solution > g2-g3 additional solution Agree. > > #33 Qe4-f4 additional solution Agree. > > #38 Qc3-d3 additional solution Agree. > > #41 b6-b7 DELETE book solution > Kb5-c5 DELETE book solution > Kb5-c6 DELETE book solution > Kb5-a5 correct solution I have: 1k6/5RP1/1P6/1K6/6r1/8/8/8 w - - bm Ka5 Kc5 b7; id "WAC.041"; > #69 h2-h3 additional solution Agree. > > #92 Nf6xg4 DELETE book solution > Be6xg4 correct solution Agree. > > #98 Nc5-b3 DELETE (2nd) book solution I have: 1r3rk1/5pb1/p2p2p1/Q1n1q2p/1NP1P3/3p1P1B/PP1R3P/1K2R3 b - - bm Nxe4; id "WAC.098"; > > #100 Bd2-e3 additional solution Agree. > > #105 Bd6xg3 additional solution I have: r2r2k1/pb3ppp/1p1bp3/7q/3n2nP/PP1B2P1/1B1N1P2/RQ2NRK1 b - - bm Qxh4; id "WAC.105"; Your solution will require careful testing and analysis by a chess expert. > > #120 Rh1-g1 additional solution Agree. > #123 Re7-c7 additional solution > Re7-e6 additional solution I have: 6k1/1b2rp2/1p4p1/3P4/PQ4P1/2N2q2/5P2/3R2K1 b - - bm Bxd5 Rc7; id "WAC.123"; Re6 will require additional testing and verification by a chess expert. > > #140 Be5-c7 additional solution I have: r2b1rk1/pq4p1/4ppQP/3pB1p1/3P4/2R5/PP3PP1/5RK1 w - - bm Rc7; id "WAC.140"; Bc7 will require additional testing anf verification. > > #142 f5-f6+ additional solution Agree. > > #150 Bd6-a3 additional solution > e4-e3 additional solution Agree. > #152 Nc3-d5 DELETE book solution > Nc3-e4 correct solution Agree. > #157 h3xg4 DELETE book solution > Nd5-e7+ correct solution Agree. > #199 Rc1-d1 additional solution Agree. > #210 Be2-b5 DELETE book solution > Rd1-h1 correct solution Agree. > #216 Nf3-g5 additional solution > a2-a4 additional solution I have: r2qr1k1/1b1nbppp/p3pn2/1p1pN3/3P1B2/2PB1N2/PP2QPPP/R4RK1 w - - bm Nxf7; id "WAC.216"; Your solutions will require additional testing and verification by a chess expert. > #224 e5-e4 additional solution Agree. > #229 Rh5xh4 additional solution Agree. > #230 Rb7-a7 additional solution > Rb7-b5 additional solution > Rb7-b6 additional solution > Rb7-d7 additional solution > Rb7-f7 additional solution > Rb7-g7 additional solution > Rb7-h7 additional solution > Kc6-b5 additional solution > Kc6-b6 additional solution > Kc6-d7 additional solution > Bc8-d7 additional solution > a5-a4 additional solution > Rb7-c7 additional solution No way. Rb4 is the only winning move, and it is a winning move. All the others are foolish time wasters. > #232 Qa6-b5 additional solution Agree. > #249 d4-d5 additional solution Agree. > #264 Rd8xd4 DELETE book solution > Ra8-b8 correct solution Agree. > #273 g4-g3 additional solution Agree. > #275 b7-b5 additional solution > Nd7-c5 additional solution I have: r1b2rk1/1p1n1ppp/p1p2q2/4p3/P1B1Pn2/1QN2N2/1P3PPP/3R1RK1 b - - bm Nxg2 b5; id "WAC.275"; Your solution Nc5 will require additional testing and verification by a chess expert. > #277 Rg8xg2 additional solution Agree. > #278 (none) add black knight on c6 Here is what I have: [D]r2qkb1r/pppb2pp/2np1n2/5pN1/2BQP3/2N5/PPP2PPP/R1B1K2R w KQkq - bm Bf7+; id "WAC.278"; > #279 Rb3-c3 additional solution I have: r7/4b3/2p1r1k1/1p1pPp1q/1P1P1P1p/PR2NRpP/2Q3K1/8 w - - bm Nxf5; id "WAC.279"; Your solution Rc3 will require additional testing and verification by a chess expert. > #294 Bd6-f8 additional solution > Qg4-f4 additional solution Agree. > > #296 Rd8-d4 DELETE book solution > Bc6-d7 correct solution I have: 3r4/1p2k2p/p1b1p1p1/4Q1Pn/2B3KP/4pP2/PP2R1N1/6q1 b - - bm Rd4+ Rf8; id "WAC.296"; This one is pretty topsy-turvy compared with your notes. Hence it will need analysis and verification. > #297 Bc6xg2 additional solution Agree. Most of your corrections are well known. >------------------------------------------------------------------------------ > > N O T E S > ============= > >#22 Ba2 also wins a pawn. > > [Nxe6, Qe2, Qh5, Bb5+, and Bf1 also recover the pawn; however, the > book solution Nxf7 (and Ba2 to a lesser extent) are positionally > better.] > > >#30 [Qc3+ is not as good as the book solution Nxd6.] > > >#31 dxe6 also wins. For example, 1. dxe6 fxe6 2. Ng5 Bxh2+ > 3. Kxh2 Qf4+ 4. Kg1 Rf8 5. Nf3 and white is a piece ahead. > > g3 also wins. For example, 1. g3 Bd6 (1... Bxg3 is better) > 2. dxe6 Rd8 3. Ng5 and white is winning. > > >#33 Qf4 also wins. > > >#38 Qd3 also wins the queen for the rook. > > >#41 The book solutions b7, Kc5, and Kc6 are NOT the most economical; > Ka5 is the most economical method. > > >#52 [c4 is not as good as the book solution Re7.] > > >#60 [Qh7+ also mates, but not as economically as Qh8+.] > > >#69 h3 also wins. For example, 1. h3 Qd1+ (1... Qh4 2. Re8+ Rd8? > 3. Qe6+ Kb8 4. Qd7! and white mates) 2. Kh2 Rd6 (if 2... Rd8 > 3. Re7 wins, if 2... b6 3. Qe4 wins, if 2... c6 3. Re8+ Rd8 > 4. Rd7 Re7 5. Qd6 wins) 3. Qh8+ Rd8 4. Re8 and white wins. > > >#90 [Nxh6+ is not as good as the book solution Nxg7.] > > >#92 The book solution Nxg4 does NOT win a pawn. The refutation is > 1... Nxg4? 2. Bxg7 Qh5 3. Bxg4 Bxg4 4. Qd4! > > Bxg4 does win a pawn. For example, 1... Bxg4 2. Bxg4 Nxg4 > 3. Bxg7 Qh5 and black will regain his piece a pawn ahead. > > >#98 Both book solutions (Nxe4 and Nb3) win; however, Nxe4 is the most > economical. > > >#100 Be3 also wins. For example, 1. Be3 Bd6 (1... Kb6? 2. Bxf5!) > 2. Ka5 Bc7+ 3. b6+ Bxb6+ 4. Kb5 Bc7 5. Bxc5+ Ka8 6. Be3 > and white wins; or 1. Be3 Bb6 2. Bf2 Ka8 3. Be1 Bc7 > (3... Kb8 4. Ba5 Ka7 5. Bxb6+ Kxb6 6. Ka3 Ka7 7. Kb3 Kb6 > 8. Ka4 Ka7 9. Ka5 and white wins) 4. Ba5 Bxf4 5. b6 Be3 6. Kb5 > and black is soon mated. > > >#104 [Qe4 and Qg4 also mate, but not as economically as Qxh5.] > > >#105 Bxg3 also wins, if not as cleanly. > > >#120 Rhg1 also wins. For example, 1. Rhg1 Qg6 2. Nh4 Rxf6 > 3. Nxg6 Rxg6 4. Qh4 and white has won the queen for two pieces. > > >#123 Rc7 also wins. > > Re6 wins most economically. For example, 1... Re6 2. Qb5 g5 > 3. Qd3 Re1+ 4. Rxe1 Qxd3 and white's game is collapsing. > > >#130 [After 1... Qh6 2. Bxe3 Qxh3 3. Re2 Rh6! black wins easily; > however, after 2. Rxe3! fxe3 3. Qxe3 Qxe3 4. Bxe3 Rf3 5. Bg5 Rxh3 > 6. Kf2 the win is not straightforward.] > > [Qh8 does not work, as should be clear from the above line.] > > >#136 [Qf6 and Nxg7 also mate, but not as economically as Rc8+.] > > >#140 Bc7 also wins. For example, 1. Bc7 Rf7 2. h7+ Kh8 3. Qxf7 Be7 > 4. Qxe7 and white is ahead a rook and a bishop with an easy win. > > >#142 f6+ also wins. For example, 1. f6+ Qxf6 2. Rh7+ Kxh7 3. Qxf6 > does the job. > > >#146 [Bd3 and Bh3 also win, but not as economically as Bc8.] > > >#149 [1... Bxg2 2. Re3 Rxe3 3. Qxe3 f4! wins decisively.] > > >#150 [1... Bf8 2. Bc4 Bxh6 3. Qxg6+ Qg7 4. Bxf7+ Kh8 5. Rc7 Qxg6 > 6. Bxg6 Re5 7. Rh7+ Kg8 8. Rxh6 Kg7 9. Bxe4 Rxe4 and black wins.] > > Ba3 also wins. For example, 1... Ba3 2. Rc6 Kh7 3. Qe3 Qxa2 > and black wins. > > e3 wins most economically. For example, 1... e3 2. Bxe3 Qxe2 > 3. Qxd6 Rxe3 and black wins easily. > > >#152 Ne4 is stronger than the book solution (1. Nd5?! Nxd5!). For example, > 1. Ne4 Bc6 2. Nxf6+ gxf6 3. Bxf6 and white is ahead. > > >#157 The book solution hxg4 does NOT win a piece. The refutation is, > 1. hxg4 bxc2+ 2. Bxc2 (if 2. Kc1 Rd1+!) Rxd5! 3. Qh4 Rb8 > and black is holding his own. > > Ne7+ does win a piece. For example, 1. Ne7+ Kh8 2. hxg4 bxc2+ > (if 2... Qxg3? 3. Rxh7+! Kxh7 4. Rh1+ with mate to follow) > 3. Bxc2 Ba2+ 4. Kxa2 Qxe7 5. Qc3 leaves white up a piece. > > >#158 [Qe6+ also mates, but not as economically as Rxg7+.] > > >#160 [Ne6+ also mates, but not as economically as Qxd7+.] > > >#161 [Qh6 and Qh3 also mate, but not as economically as Qxd8+.] > > >#171 [Bxd5 is not as good as the book solution Bh6+.] > > >#180 [Nxd5 does not win a pawn. The refutation is, 1... Nxd5 > 2. Nf5! Bxf5 3. exf5 Qb7 4. O-O Rfe8 5. Qc4 e4 6. Bxe4 Nxe4 > 7. Qxe4 and the material is equal. Nevertheless, the book solution, > Nxd5, is still the best move positionally.] > > >#183 [Rc5 is not as good as the book solution Bf6.] > > >#193 [Qd5 (1... Qd5 2. Bd4 Qf3 3. e4 Rxd4) is not as good as the book > solution Qxe3.] > > >#199 Rcd1 also wins. > > >#204 [1. Rxe5 Qxe5 2. Ng6 hxg6! 3. Qxe5 cxd6 and it is not clear that > white is winning.] > > >#210 Rh1 is better than the book solution Bb5. After 1. Rh1 f6 > (1... h6 2. Nf6+!) 2. Qxh7+ Kf7 3. Qh5+ Kg8 4. f5 Ng5 5. Bc4 > white is clearly winning. However, after 1. Bb5 Nxf4 2. gxf4 Qe6 > black can still play. > > >#216 Ng5 also wins a pawn. For example, 1. Ng5 Nxe5 2. dxe5 Ne4 > 3. Nxe4 dxe4 4. Bxe4 Bxe4 5. Qxe4 with the extra pawn on c3. > > a4 also wins a pawn. For example, 1. a4 Nxe5 2. dxe5 Nh5 > 3. Bd2 g6 4. axb5 axb5 5. Bxb5 with a passed pawn on the b-file. > > >#223 [1. Nxe4 Bf5! 2. Qxb4 Qd5! 3. Nf3 Nc6 4. Qxb7 Bxe4+ 5. Ka1 Ne7 > and the material is equal.] > > >#224 e4 also wins. > > >#229 Rxh4 also wins. For example, 1... Rxh4 2. gxh4 g3 3. fxg3 b4 > 4. h5 c3+! 5. bxc3 bxa3 and black wins. > > >#230 [Rb4 does not win. The main line is, 1... Rb4!? 2. cxb4 a4 > 3. b5+ Kxb5 4. Ba3 c3 5. Re2! Kc4 6. f4 Kxd4 7. f5 exf5 8. e6 Kd3 > 9. e7 Bd7 10. Kf3 d4 11. Rh2 Kc4 12. Rh8 b2 13. Rb8 d3 > 14. Bxb2 cxb2 15. Rxb2 a3 16. Rb7 Be8 17. Ra7 Kb3 18. Ke3 a2 > 19. Kxd3 Kb2 20. Rb7+ Kc1 21. Ra7 =] > > Ra7, Rb6, Rb5, Rd7, Rf7, Rg7, Rh7, Bd7, Kd7, Kb6, Kb5, a4, and Rc7 > are just as good as the book solution Rb4 -- they all hold the game. > > >#232 Qb5 also wins. For example, 1. Qb5 Rc1+ 2. Kf2 Rc2+ 3. Kf1 Rc1+ > 4. Ke2 Rxe4+ 5. Kd2 and black's game collapses. > > >#235 [Qe4 is not as good as the book solutions Rxf7+ or Qxf7+.] > > >#244 [Rxd5+ also mates, but not as economically as Qxc5+.] > > >#246 [e5 also mates, but not as economically as Qh5+.] > > >#249 d5 also wins a piece. > > >#253 [c7+ also mates, but not as economically as Qe8+.] > > >#258 [1. Bxg6! Qxg6! and the win is not clear.] > > >#264 Rab8 is better than the book solution Rxd4. After 1... Rab8 > 2. Rxe7 Rxb2 3. Rf1 Rxd4 black is winning. However, after > 1... Rxd4 2. Qxd4 Qxb7 3. Be4 Qb8 4. Rb1 Qd8 5. Bd5 > white may have sufficient compensation for the piece. > > >#273 g3 also wins. For example, 1... g3 2. Bf6 Qd7 and white doesn't > have any good moves to meet Qh6. > > >#275 [After 1... Nxg2 2. Ne2! holds blacks's advantage to two pawns.] > > b5 also wins. For example, 1... b5 2. Be2 Nc5 3. Qc2 b4 > 4. Nb1 Bg4 5. Rfe1 Nxe2 6. Qxe2 Bxf3 7. gxf3 Nxa4 > and black is up two pawns and winning. > > Nc5 also wins. For example, 1... Nc5 2. Qc2 Nxg2 3. Ne1 Nxe1 > 4. Rfxe1 Bg4 5. Be2 Be6 6. Ra1 Qg6+ 7. Kh1 Bb3 8. Qb1 Rad8 > and black is also up two pawns and winning. > > >#277 Rxg2 also wins. > > [In both cases (Rg3 and Rxg2) white holds the loss to a pawn.] > > >#278 [The book diagram has a typo -- there should be a black knight on c6. > The book solution is correct, with or without the knight on c6.] > > >#279 Rc3 also wins. > > >#284 [Qf2 (1. Qf2 Qxf2 2. Kxf2 Nxc1 3. Bxc1) is not as good as the book > solution Nf5 (1. Nf5 Qg5? 2. Qxd8+! Qxd8 3. Rc8! with mate in not > more than 8 more moves).] > > >#294 Bf8 also wins (1. Bf8 Rxf8 2. Nf5). > > Qf4 wins most economically. For example, 1. Qf4 f5 2. Be5+ f6 > 3. Bxf6+ Rg7 4. Bxg7+ Kg8 5. Qg5 Kf7 6. Qxd8 Kxg7 7. exf5 > and white wins easily. > > >#296 Rd4+ does NOT win. The main line is, 1... Rd4+ 2. Qxd4 Qh2 > 3. Bxe6+! Ke7 4. Qb4+ Ke8 5. Qe1 Bb5 6. Rc2 e2 7. Rc8+ Ke7 > 8. Qb4+ Kxe6 9. Qe4+ and white will draw by perpetual check. > > Examining variations off the main line: > 3... Kxe6 4. Nf4+ clearly wins for white; > 3... Ke8 or 3... Kf8 loses to 4. Qh8+ Ke7 5. Qxh7+ and 6. Qxg6; > 4... Kxe6 5. Nf4+ Kf7 6. Qc4+ still wins for white as the > threatened mate by ...Bd7+ is covered; > 4... Kd8 5. Qe1 Bb5 6. Rc2 Qd6 and white makes use of the > king on d8 by 7. Qa5+ Ke8 8. Rc8+ Ke7 9. Qa3 winning; > Similarly, if black tries 6... Qe5 or 6... e2, white plays > 7. Qa5+ followed by the exchange of queens on c7; > If on the 5th move black tries anything but ...Bb5 then 6. Nxe3 > or Rxe3 as appropriate wins for white; > 6... Qe5 7. Rc8+ Ke7 8. Qb4+ Kxe6 9. Qe4 Bd7 10. Rc7 > wins for white; > 6... Bd3 7. Rc8+ Ke7 8. Qb4+ Kxe6 9. Re8+ Kd7 10. Qe7+ Kc6 > 11. Rc8+ Kd5 12. Nxe3+ Kd4 13. Rd8+ and mate next move; > 6... Bf1 allows white to mate in 8 as above; > 6... Qd6 7. Kh3 Qxe6+ (7... Bf1 8. Bc8 Nf4+ (8... e2 > 9. Rxe2+ Bxe2 10. Qxe2+ Kd8 11. f4 Kxc8 12. Qe8+ Kc7 > 13. Qe5 +/-) 9. Kg4 +/-) 8. Kh2 e2 9. Qc3 Qd6+ 10. Kg1 Qd1+ > 11. Ne1 Qd6 12. a4 +/-. > > Bd7 does win. The main line is, 1... Bd7 2. Kh3 Qh1+ 3. Kg4 b5 > 4. Bb3 Ke7! 5. Nxe3 Qg1+ 6. Kh3 Rf8 7. Nd5+ Ke8 8. Nf6+ Rxf6 > 9. Qb8+ Kf7 10. gxf6 Qf1+ 11. Rg2 Qh1+ 12. Qh2 Nf4+ 13. Kg3 Qxg2+ > 14. Qxg2 Nxg2 15. Kxg2 winning for black. > > [The book position is correct -- the black king is on f7. This > position is from the game Muller-Stahlberg, Zurich, 1934. After > 32. Bc4 the game ended 32... Re8 1/2-1/2 -- Reinfeld's book > combination was never played.] > > >#297 Bxg2 also wins. For example, 1... Bxg2 2. Kxg2 Qg5+ 3. Kf3 Rde8 > 4. Rg1 Qf4+ 5. Kg2 Re2 6. Nf3 Rxc2 7. Rxc2 Qg4+ 8. Kf1 Qxf3 > with an easy win for black. > >------------------------------------------------------------------------------

- Re: WAC Corrections
**Dann Corbit***20:03:23 04/12/01* - Re: WAC Corrections
**Alex Szabo***17:23:15 04/12/01*- Re: WAC Corrections
**Dann Corbit***19:32:40 04/12/01*

- Re: WAC Corrections
- Re: WAC Corrections
**Miguel A. Ballicora***12:48:29 04/12/01*- Re: WAC Corrections
**Dann Corbit***17:03:11 04/12/01*

- Re: WAC Corrections
- Re: WAC Corrections
**Gian-Carlo Pascutto***12:24:21 04/12/01*- Re: WAC Corrections
**Alex Szabo***16:59:29 04/12/01*

- Re: WAC Corrections
- Re: WAC Corrections
**Gian-Carlo Pascutto***12:04:07 04/12/01* - Re: WAC Corrections
**Gian-Carlo Pascutto***11:42:14 04/12/01*

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