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Problem 3900
tesuji
4-4 (hoshi) Joseki

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This problem is meant for weaker players, and is by no means a challenge for higher-level players. Oh well, I preposterously assumed it was not that hard.

During this well-known variation of San-san invasion, Black builds up a wall, said to be uncuttable. White tries to probe this claim, backed up from far away. Assume all ladders work for White.

Thanks to Andre Engels for variations

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