Definitions: (click to show/hide)
Andernach Chess: A piece (excluding King) changes its color after any capturing move. Rooks on a1, h1, a8 and h8 can be used for castling, provided the usual other rules for that move are satisfied.
Isardam: Any move, including capture of the King, is Isardam illegal if a Madrasi-type paralysis would result from it. (Madrasi: Units, other than Kings, are paralysed when they attack each other. Paralysed units cannot move, capture or give check, their only power being that of causing paralysis.)
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No.1083 Peter Harris
South Africa
original – 12.06.2016
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Solutions: (click to show/hide)
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white kg4 qe4 re6
black kb8 qc1 rh2
hs#3.5 2 solutions (3+3)
Andernach Chess
Isardam
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1...Rh2-b2 2.Re6-h6 Rb2-b4 3.Rh6-h4 Qc1-b2 4.Qe4-b7 + Kb8*b7 #
1...Kb8-a7 2.Qe4-b4 Qc1-h1 3.Re6-g6 Rh2-g2 + 4.Qb4-b7 + Ka7*b7 # {
(C+ by Popeye 4.75)}
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Nice idea… Pity it is 4.Qb7+ both times though from different squares.