In 1993, AISE organized a `Grand Prix' tournament (played by postal mail) on Shatar. In later years, more Shatar tournaments were held in this game.
The first move of the game is obligatory: 1. d2-d4, followed by 1. d7-d5.
There are different types of check: Shak is given by queen, rook or knight; Tuk is given by a bishop, and zod is given by a pawn. As written above, a mate with a knight is forbidden. Moreover, one may not mate except by a shak (i.e., checking by queen or rook), or by a mate that is followed after a series of checks that included at least one shak. E.g., if we mate the opponent after checking with a knight, then in the next move with a pawn, and then mating with a bishop, then the game is won. If one mates the king without fulfilling the criterium, i.e., with a bishop or pawn, or after a series of bishop and pawn checks, then the game is a draw - this is called Niol. Also, if a player has only a king and no other pieces left, then the game is a draw - this is called Robado.