Retroanalyse im Schach
in der Retroanalyse
34 - Lord Dunsany
Fairy Chess Review, 1943
10+9. Matt in 2 Zügen
What was black's last move? It can't have been with Bb1 or Pa2. It
can't have been d6xe5 either, because this would require 8 captures
by black. If the last move was d7xc6, then the bishop on b1 is promoted.
For this, the g-pawn needs to capture once, and promote on f1. Bust
this requires 7 captures. It can't have been e7-e5: pawn on c6 and the
pawn on a2 account for all black captures. But all those captures were
on white squares, and white misses his black-squared bishop too. So
black's last move was with his king or his rook.
1. Ke6 ~ (OOO?) 2. Rh8#
Solution by Philippe Schnoebelen