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A case where a player should have made a Go Seigen group, but did not and paid the price. Whilst a completed GSG group is bullet-proof, if it is incomplete it is in a rather precarious state, squeezed between two enemy positions.
This was Kim Il-hwan taking White against Seo Pong-su in 1988. The pro commentary said White 22 should have been haengma at A. That looks pretty high level, doesn't it?! Also (for when you look at the full game), note forcing at 50 was said to be safer at 94. Incidentally, you will see from this that haengma (an important Korean concept), can often be translated as 'making good shape', though 'developing in good shape' retains more of the Korean flavour. Also for when you go into study mode, the commentary said White 72 was amazingly big and Black 97 was a brilliant move. Seo won after just 185 moves. Consider the impact of the north-east White group. Zilch, really, because it ended up running gasping for breath instead of being a beating heart. Rob van Zeijst's QARTS theory is relevant here: a hunted weak group without eyes loses 20 points and a hunted weak group with room for one eye (as here) loses up to 10 points.
The full game in sgf form: © John Fairbairn & T Mark Hall (GoGoD), London 2007. |
