Assassin Kriegspiel

Rules

At the start of the game, the players set their pieces secretly on the first four rows of the board, i.e., white deploys his pieces on rows 1, 2, 3, and 4, and black deploys his pieces on rows 5, 6, 7, and 8. These setups are shown to the referee. In this deployment, a player must put his bishops on differently colored squares, but may place his pawns on the first row. (Pawns on the first row make single step to the second row from which they can doublestep.)

Then, the referee tells both players the position of the king of the opponent.

After that, the game proceeds like kriegspiel, with the following differences:

1. When a player mates the opponent with the queen (who is called assassin in this game), then he wins the game.
2. When a player mates his opponent with a piece, different from the queen (assassin), then he loses the game.
3. Knights are called spies. A knight cannot capture a piece, and a knight does not give check. (So, when a player tries a capturing move with a knight/spy, then the referee tells him this move is illegal.) After a knight move, the referee tells the player the contents of each of the (at most 8) adjacent squares. So, after white moves his knight to a4, the referee tells him what pieces are on a3, a5, b3, b4, and b5. The referee does this in such a way, that the opponent is not aware of the fact that the other player made a knight move.
4. Knights/spies can be captured, but cannot capture themselves.
5. When both assassins are captured, the game is a draw.