From: Pauli Misikangas <pmturune <at> CS <dot> HELSINKI <dot> FI>
Date: 5 mar 2001
Subject: Re: not promoting rook or bishop? (about Sam Sloan HP)

On Mon, 5 Mar 2001, Majewski, Thomas wrote:

> I have seen a game of Tanigawa, where culd not promote his bishop in a tsume
> sequence, because a move later he had to drop a pawn to mate his opponents
> king. If the bishop would have been promoted, the pawn drop would deliver
> mate and therefore illegal. Without the bishops promotion it was just a
> check and the mate came one or two moves later.

This situation may happen with pawns as well, not just rook and bishop.
I have seen some tsume-shogi problems in which the key is to not promote
a pawn (even if possible) to allow dropping a pawn in front of the enemy
king later.

Pauli Misikangas