|Circe:||Captured units (not Ks) reappear on their game-array squares, of the same colour in the case of pieces, on the file of capture in the case of pawns, and on the promotion square of the file of capture in the case of fairy pieces. If the rebirth square is occupied the capture is normal.|
No. 1653 Aleksey Oganesjan
original - 18.09.2021
b) Sc8→f8; c) Ra8→h8 6+4
Solution: (click to show/hide)
(C+ by Popeye 4.87)
A try in every twin is unlucky because castling is illegal. Only King or Rook
could have executed last Black move because capture b4xc3 or d4xc3 is illegal —
a rebirthed Pc2/Qd1/Ra1/Bc1/Sg1 is not exist on the board!
So in a), there are two sacrifices and rebirths of the Rook to provide one of castlings.
In b) and c), there is a change of sacrifice and a change of White piece kind that captures the Rook (but with the same mating positions).
In total, four different Black sacrifices that accepted by four different White pieces.