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Simon Zeckarias (2010-09-15 17:40:01)
GoPosition (see diagram)
Thibault de Vassal (2010-09-15 18:22:44)
As Black move a3 comes to my mind in micro-seconds, I guess it's not the right move... hmmmm. By the way, is it Black turn or White turn?
Simone Calvello (2010-09-16 09:55:39)
I think I've found a possible solution whoever has to move: 1) If it's Black's turn, a3 and I haven't found a plausible way to save the b3-c3 group; 2) If it's White's turn, a2 and the b2-c2 group falls also, because b1 doesn't work (hoping for a1 and Black plays a3 gaining a1-a2) if White plays a3, and the b2-c2-b1 group is gone. Since my level is really low, I could have made several blunders... :)
Simon Zeckarias (2010-09-16 13:57:26)
Hi, ok, some hint: black lives without ko :-). A3 doesn't work: Black A3;C1; black needs B1 otherwise dies big; A2 is now tesuji and W has to D1; A4; B needs to disconnect white at A5; White E1 and this is ko :-). Enjoy more!
Simon Zeckarias (2010-09-17 15:19:06)
This problem took my 6d friend 1 minute to solve, my 2k friend more than hour. Once you see the move, it is simple.
Quentin Turlot (2010-10-10 21:16:09)
Looks like black has to begin with the empty triangle, then the liberty race is ok and white can't set a dead shape.
Samuel Grguric (2011-03-09 23:53:12)
Yeah that works. b1 or b4 both work for b to play and live.
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