Author: Alex Szabo

Date: 07:45:23 04/12/01

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 #31 d5xe6 additional solution g2-g3 additional solution #33 Qe4-f4 additional solution #38 Qc3-d3 additional solution #41 b6-b7 DELETE book solution Kb5-c5 DELETE book solution Kb5-c6 DELETE book solution Kb5-a5 correct solution #69 h2-h3 additional solution #92 Nf6xg4 DELETE book solution Be6xg4 correct solution #98 Nc5-b3 DELETE (2nd) book solution #100 Bd2-e3 additional solution #105 Bd6xg3 additional solution #120 Rh1-g1 additional solution #123 Re7-c7 additional solution Re7-e6 additional solution #140 Be5-c7 additional solution #142 f5-f6+ additional solution #150 Bd6-a3 additional solution e4-e3 additional solution #152 Nc3-d5 DELETE book solution Nc3-e4 correct solution #157 h3xg4 DELETE book solution Nd5-e7+ correct solution #199 Rc1-d1 additional solution #210 Be2-b5 DELETE book solution Rd1-h1 correct solution #216 Nf3-g5 additional solution a2-a4 additional solution #224 e5-e4 additional solution #229 Rh5xh4 additional solution #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 #232 Qa6-b5 additional solution #249 d4-d5 additional solution #264 Rd8xd4 DELETE book solution Ra8-b8 correct solution #273 g4-g3 additional solution #275 b7-b5 additional solution Nd7-c5 additional solution #277 Rg8xg2 additional solution #278 (none) add black knight on c6 #279 Rb3-c3 additional solution #294 Bd6-f8 additional solution Qg4-f4 additional solution #296 Rd8-d4 DELETE book solution Bc6-d7 correct solution #297 Bc6xg2 additional solution ------------------------------------------------------------------------------ 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
**Jeremiah Penery***12:06:03 04/12/01*- Re: WAC Corrections
**Alex Szabo***17:09:44 04/12/01*- Possible alternative analysis for WAC.230...
**Dann Corbit***21:39:03 04/12/01*- Re: Possible alternative analysis for WAC.230...
**Dann Corbit***22:27:48 04/12/01*

- Re: Possible alternative analysis for WAC.230...

- Possible alternative analysis for WAC.230...

- Re: WAC Corrections
- Re: WAC Corrections
**Dann Corbit***10:24:02 04/12/01*- 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*

- Re: WAC Corrections

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