8th World Chess Composing Tournament of the FIDE

Questions and Answers 10

Section F (selfmates)

Are virtual lines considered thematic?
For example: In the 1st black move, a white piece is captured. After this
capture, a white line-piece can NOT move onto a square which is located (either
orthogonally or diagonally) behind the black thematic piece, because after
a 2nd move of this black piece, a line would be emerging which would cause
a damage.

Reply: Yes, "virtual" lines of this kind are considered thematic.

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