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PlayingAGameBackward
PGB271

 

PGB261
   

[Diagram]
Diag.: Position after black 261

Everything on the board is settled and the players have to make the largest yose moves. But it was a fast online game and the minda are still in the midgame, so the moves that are not in the spitrit of the position were made.

I believe that the moment of the transition to yose is very important in the game. The player who makes it first usually wins several points. On the other hand, the player who insists on continuation of chuban loses points.


[Diagram]
Diag.: Moves 262-271 (8 at 2)


To PGB251

White 1 (262) loses points if black play correctly. It is a desparate attempt to squeeze something effective. It was not punished in the game. White knows that his group is dead, but black has an eyeless group squeezed between two white groups, so white seeks his chance.

Black 2 is a sacrifice that allows to kill white group faster. It is necessary sooner or later (or another defensive move in own territory, but is it urgent?

White 3 captures, still hoping for something.

Black 4 makes an atari. The question again if it was urgent.

White 5 takes one outside liberty from black and threatens to close the territory in that region in sente.

Black 6 is a one point move (1/2 miai). Black had bigger moves on the board.

White 7 is sente.

Black 8 is absolutely necessary. White groups are not only dead but cold now.

White 9 is a sente move. White retruned to ordinary yose moves.

Black 10 connects.

Next is PGB251


BillSpight: B 2 is not good. The right local play is at b, to prevent White's eye. With no eye, White poses no threat. B 4 is worse. Black still needs a protective play. B 4 loses one point inside his territory.

But the big play for Black is on the right side, at a.




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