I’ve picked up a book ‘The Flanders Panel’ which has a retrograde puzzle inside.
What was Black’s last move? Solve that and you solve a murder.
In one of the puzzles you have to find a Rook mate, a Knight mate and a Bishop mate.
Black to play. Look for checkmates in two moves.
Also some RHP examples leading up to this position
Black to play. Spot the shot that was a blunder.
Blog Post 697
@greenpawn34
I found out why it had to be a Knight 🙂
The missing bishop was black
The c-pawn is still on the board, as are the b and d-pawns (the latter on c6 after taking).