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Block On The Wider Side
Difficulty: Advanced
Keywords: Proverb, Opening, Joseki
This proverb is meant for the situation in this diagram: White has just invaded at the 3-3 point below black's 4-4 point (see ThreeThreePointInvasion). At which side should black block, at A or at B? The general rule is to block where your extension is wider or the potential moyo is larger.
In this diagram the circled move is farther away than the square one (so it is the wider extension), so black blocks at 2 rather than A.
Here the circled and the squared stone are at the same distance, but if one looks beyond it, the upper moyo still extends further than the left one, so again black 2 is the correct move. This is a copy of the living page "Block On The Wider Side" at Sensei's Library. (C) the Authors, published under the OpenContent License V1.0. |