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.

HTH.


>>SCHOOL in the US – 1957 vs. 2008
>
>In chess, there's an expression which I can't translate... "to put a move in envelope". That's what I'm doing now. I wrote down my prediction. I may be back to see whether the move was right.