Duck Chess

It's like chess, only with a duck.

The duck occupies one square on the chess board at all times, and acts as a blocker. It cannot be moved through or taken, and the square it occupies is for the duck alone.

You move a chess piece, then move the Duck.

Every chess move must be followed by a Duck move.

The Duck can be moved to any square on the board.

So, a game might start:

1. e4/De6 (preventing 1...e5 and 1...e6)
1...c5/De2 (preventing developing of Queen or Bishop)
2. Nf3/Dc6
2...e6/De2 (as above)
3.g3/De7 Nc6/Dg2

A move is not complete until the duck has been moved.

The position after the duck has moved must be legal under Duck Chess rules, but can include things like:

1.e4/De6 f6/Dd4
2.Qh5/Dg6 e5/Df7

The Black King was not and is not in check!

You win by taking the King (there is no 'checkmate' claim). Do announce checks, as the position must be legal.

Because the Duck can intervene, you will probably succeed in taking the enemy King only by moving next to the King first, or by using a Knight. The other way to win is by Zugzwang e.g. with bK on e8 between bRd8 and bBf8 and with, 1.Qe6/De7 will win as Black must move the Duck next move, exposing the King to the Queen's glare.

All other normal rules of chess apply.

We have recently invested in a modest quantity of small rubber ducks, all the better to play this game.

I don't know the author or anything else about this game, but I'd like to.

Chess Quotes

"Flip-Coin Chess: Does not pay attention to all (or sometimes even any!)
of the threats generated by the opponent's previous move.

Hope Chess: Does pay attention to all the threats generated by the
opponent's previous move, but, before making their current move, does
not check to make sure that all checks, captures, and threats by the
opponent on the next move (in reply to that move) can be safely met.

Real Chess: Not only deals with opponent's threats from the previous
move but, before making their move, also makes sure that the opponent