I would play Bd4 then; thus the diagonal d4-a1 will be blocked with a pawn or a piece and enables the pawn on a3 to promote.;
2....Bd4 3. Nxd4 a2 -+
I would play Bd4 then; thus the diagonal d4-a1 will be blocked with a pawn or a piece and enables the pawn on a3 to promote.;
2....Bd4 3. Nxd4 a2 -+
RE: Chess problem 78 / Schachaufgabe 78