change log for P0000004 (close)

datetimeuserobjecttablefieldtypeoldnew
2021-04-1916:24:12James Malcom P0000004 problems solution  updateRetro: 1. g2! (1. g3/hxg4/Nb6? will only lengthen the game) Nh6 2. Nb6 N-49. Nc8 N-! (49. ... b7/b6? 50. Rb5 & 1. Rxb7/axb6#) 50. Nb6 N- 51. Nc8 & 1. axb6ep#!! only this possibility of ep at the first move justifies 100 subsequent half-moves (preceding the retro-key) without a draw. R: 1. g2-g4! Sh6-g8 2. Sb6-c8 Sg8-h6 3. Sc8-b6 Sh6-g8 4. Sb6-c8 Sg8-h6 ... 49. Sc8-b6 Sh6-g8 50. Sb6-c8 Sg8-h6 51. axb6ep# Retro: 1. g2! (1. g3/hxg4/Nb6? will only lengthen the game) Nh6 2. Nb6 N-49. Nc8 N-! (49. ... b7/b6? 50. Rb5 & 1. Rxb7/axb6#) 50. Nb6 N- 51. Nc8 & 1. axb6ep#!! only this possibility of ep at the first move justifies 100 subsequent half-moves (preceding the retro- key) without a draw. R: 1. g2-g4! Sh6-g8 2. Sb6-c8 Sg8-h6 3. Sc8-b6 Sh6-g8 4. Sb6-c8 Sg8-h6 ... 49. Sc8-b6 Sh6-g8 50. Sb6-c8 Sg8-h6 51. Sc8-b6 Sh6-g8 52. axb6ep# 
2021-04-1916:23:23James Malcom P0000004 problems solution  updateRetro: 1. g2! (1. g3/hxg4/Nb6? will only lengthen the game) Nh6 2. Nb6 N-49. Nc8 N-! (49. ... b7/b6? 50. Rb5 & 1. Rxb7/axb6#) 50. Nb6 N- 51. Nc8 & 1. axb6ep#!! only this possibility of ep at the first move justifies 100 subsequent half-moves (preceding the retro-key) without a draw. R: 1. g2-g4! Sh6-g8 2. Sb6-c8 Sg8-h6 3. Sc8-b6 Sh6-g8 4. Sb6-c8 Sg8-h6 ... 49. Sc8-b6 Sh6-g8 50. Sb6-c8 Sg8-h6 51. Sc8-b6 axb6ep# Retro: 1. g2! (1. g3/hxg4/Nb6? will only lengthen the game) Nh6 2. Nb6 N-49. Nc8 N-! (49. ... b7/b6? 50. Rb5 & 1. Rxb7/axb6#) 50. Nb6 N- 51. Nc8 & 1. axb6ep#!! only this possibility of ep at the first move justifies 100 subsequent half-moves (preceding the retro-key) without a draw. R: 1. g2-g4! Sh6-g8 2. Sb6-c8 Sg8-h6 3. Sc8-b6 Sh6-g8 4. Sb6-c8 Sg8-h6 ... 49. Sc8-b6 Sh6-g8 50. Sb6-c8 Sg8-h6 51. axb6ep# 
2021-04-1916:23:05James Malcom P0000004 problems solution  updateRetro: 1. g2! (1. g3/hxg4/Nb6? will only lengthen the game) Nh6 2. Nb6 N-49. Nc8 N-! (49. ... b7/b6? 50. Rb5 & 1. Rxb7/axb6#) 50. Nb6 N- 51. Nc8 & 1. axb6ep#!! only this possibility of ep at the first move justifies 100 subsequent half-moves (preceding the retro-key) without a draw. R: 1. g2-g4! Sh6-g8 2. Sb6-c8 S-h6 3. Sc8-b6 S- 4. Sb6-c8 S- ... 49. Sc8-b6 S- 50. Sb6-c8 S-! Sc8-b6; axb6ep# Retro: 1. g2! (1. g3/hxg4/Nb6? will only lengthen the game) Nh6 2. Nb6 N-49. Nc8 N-! (49. ... b7/b6? 50. Rb5 & 1. Rxb7/axb6#) 50. Nb6 N- 51. Nc8 & 1. axb6ep#!! only this possibility of ep at the first move justifies 100 subsequent half-moves (preceding the retro-key) without a draw. R: 1. g2-g4! Sh6-g8 2. Sb6-c8 Sg8-h6 3. Sc8-b6 Sh6-g8 4. Sb6-c8 Sg8-h6 ... 49. Sc8-b6 Sh6-g8 50. Sb6-c8 Sg8-h6 51. Sc8-b6 axb6ep#