From: Pieter Stouten <stouten <at> SHOGI <dot> NET>
Date: 12 apr 2000
Subject: Re: Checkmate

On 00/04/12 at 13:56 +0200, Majewski, Thomas wrote:

>[...] I deduct,
>that you can survive giving checkmate with a hanging flaf on the clock,
>because you do not have to take the king with your next move. But
>delivering checkmate and your flag is falling exectly than might be
>another story. Does everybody agree to this?
>
As was mentioned before the move is made when the piece has been
released. Since a move cannot be taken back, this means that the game
has ended the moment the mating move was made, even before the clock
was ticked.

Now the question is: what happens if the mate-giving player does not
notice it? No problem, as play continues and the mate-giving player
will lose on time.

The real issue here is: how can one be sure that the mate-giving
player actually notices that it is mate? It is conceivable that under
serious byoyomi-pressure, a player might not notice he has delivered
mate. Is the mate-giving player required to announce it is mate? This
is not the practice in tournaments I have participated in, so what
rule should govern this situation?

Ciao,

Pieter