>Dragan,
>
>That's called a "sealed move". It's used primarily in tournaments when play must be suspended due to the end of the playing day, a power outage, time restraint or other non-playing situation; it's also used when players are playing a game by snail mail over long distances without the aid of computers.
>
>This technique was brought to light during the Bobby Fischer - Boris Spassky matches back in the 1970's. Because there were no player clocks used, each move took far longer than a normal game.

Thanks - at least I've learned a new expression. The thread isn't going where I thought it would, so the move seems to be useless.