PLAY

In this Go variant, standard ko rules don't apply. Instead, it's illegal to make a capture if your opponent made a capture on his previous move.

All other rules are the same as in Go. Suicide of one or more stones is not allowed, and area scoring is used.

NOTES

All known forced Go cycles (most of which are described at http://senseis.xmp.net/?Cycle) are impossible with this rule. The nature of the rule itself suggests that forced cycles are either impossible or astronomically rarer than they are in Go when the superko rule is not used.

This implementation uses stone scoring instead of area scoring for code simplicity and efficiency purposes. This means that the game will be won by the player who has more stones on the board at the end. However, you can make Zillions calculate the area score by filling territories manually at the end of the game with the board edit option.

You can place blocks the same way to change the size and shape of the board. As always, right clicking with C key down copies a piece, and right clicking with V key down pastes it. If you then drag the mouse, you can paste onto multiple positions.