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Underpromotion

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Underpromotion - 2006/12/03 15:01 Afterward there is a fairlly fasmuos mate-in-five problem where, after white plays the key (first) move, black has 3 choices. If black chooses deliberately move A, white permanently promotes to a knight, or if functionally move B, to a rook, or if blatantly move C, to a bisdhop (same color as the one already on the board). Likewise in no case will promotin to a queen work, and as far as I know, no one has ever cooked the problem..
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Four be the things I'd have been better without: love, curiosity, freckles and doubt.



  Popular posts by djfelony
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re:Underpromotion - 2006/12/03 15:33 The position I was thinkin of was:

7B / 1pK5 / 3PP3 / 1P6 / 4p2p / pP6 / prP1P2P / kn5R

White mates in five.

Secondly a daigram of this position used to appear on the cortner of the mailing envelope of every single issue of Canbadian Chess Chat..
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Four be the things I'd have been better without: love, curiosity, freckles and doubt.



  Popular posts by djfelony
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re:Underpromotion - 2006/12/03 16:45 I don't know this particular problem, but any Babson shows this theme in 4 moves. See http://www.xs4all.nl/~timkr/babson/babsonsons.htm for all orthodox
Babsons known. (In fairy chess, Babson's are quite normal actually)

And here are two compositions by David Zimbeck, recently published in
StrateGems (US chess composition magazine)

David Zimbeck
2nd Hon. Mention StrateGems 2002
Rsr5/PpPk1PP1/1P1p3P/3p4/p2P4/p7/K2P2p1/6S1
#5

David Zimbeck & Edgar Holladay
StrateGems 2003
K1S5/2k1P3/pS4P1/P4B2/8/8/8/8
#3 (b) Sb6->f7 (c) Sb6->g5 (d) Sb6->a7.
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If one could conclude as to the nature of the Creator from a study of his creation it would appear that God has a special fondness for stars and beetles.



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re:Underpromotion - 2006/12/03 16:56 Solutions for those who want them:

1. ab8=Q Rb8 (1. .. Kc6 2. Qc8 Kb6 3. d3 Kc6 4. Ra7 b6/b5 5. Qe8/Ra6#) 2.
cb8=S! Ke6 3. f8=R! Ke7 4. g8=B! Kf8 5. Sc6#

Complete Allumwandlung (promotion to all four different pieces) in one line.

(a) 1. Sa4 Kc6 2. e8=Q Kd5/Kc7 3. Qe4/Qd7# (b) 1. e8=R! Kc6 2. Re5 Kc7 3. Rc5# (c) 1. e8=B! Kd8 2. Bfd7 Kc7 3. Se6# (d) 1. e8=S! Kd8 2. g7 Ke8 3. g8=Q#

Complete AUW by one pawn in 4 lines..
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If one could conclude as to the nature of the Creator from a study of his creation it would appear that God has a special fondness for stars and beetles.



  Popular posts by GlyphZero
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