Forbidden Move Game
A 'forbidden move game' is an experimental game.
In addition to common rules, each player has to name a move the opponent is not allowed to play.
Thus each player can delay an immediate counter-threat, but he has to reveal the counter-move he is most afraid of.
A 'forbidden move game' example: http://www.dragongoserver.net/game.php?gid=22767
More 'forbidden move game' examples: (I had to give it a try, too)
13x13
http://kgs.kiseido.com/games/2005/4/8/Namii-Nu0li.sgf
9x9
http://kgs.kiseido.com/games/2005/4/9/Namii-Wraith.sgf
5x5
http://kgs.kiseido.com/games/2005/4/8/Namii-Nu0li-2.sgf
- Kuolema
Dieter: Just a thought: any alteration of the rules can make for an interesting new game. The Go variants I am interested in most are those that can train a certain aspect of the game so that your overall game improves. Examples include the shape game, free placement handicap, komi handicap, rengo, or predefined opening such as Sunjang Baduk. The variant suggested here in my opinion can lead you more astray of proper Go play than lead towards it. Worth a try on congresses and the likes to have some fun.