BQM 223

  Difficulty: Intermediate   Keywords: Question
[Diagram]

gassan's move



revo: This is from a KGS game between gassan(6d) and SuiYi?(4d) ([ext] http://files.gokgs.com/games/2005/5/20/gassan-SuiYi.sgf Move #149). My question is, is W1 there really so much better than the solid connection at a, that it's worth leaving a four point ko threat at b? (The threat is probably even bigger since it could completely kill the white corner). Maybe I should have shown a bigger part of the board, but let's assume white is shut in, so it's also a question of life and death. But I think, a would make life quite the same way, but without leaving a ko threat.
I see moves like this made very often by players of all strength. I play them myself frequently, because it looks like better shape. But if I look at this closely now, I think a would be a really better move. However, the 6d white didn't think so and I hope someone can explain why.

Thanks for your comments.


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