This a Correspondence Game A Correspondence Game means if both The players are Very far away from playing the game The game will be Announced to the players so it was very far away so they Used this Technique to Play . They used Post card and delivered them to the player
and it also cause Money And time So Alan Had a Trick He sent the Two moves in One Postcard
To save Money and time so he sent the post card and was shocked since he had sent his Second move White Played... Bishop to H6 Since Black has already sent his 2nd move now he cannot capture the Bishop because he had already sent his 2nd move so White Will happily