Late Yose Problems
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Usually professional games records do not include the last 10 to 30 moves. In most cases these dame filling and consolidating moves are completely obvious.
But about 10% of close games include nice tesujis (or reinforcements to prevent them). Also finding the correct order of moves that gives an optimum result is quite a challenging problem for beginners like me.
I started to look for finished professional games to test automatic go scoring algorithms. Since game records end before the dame are filled, I had to finish them myself by adding the last moves. Only these last "obvious" moves are not always easy to find. Here I will put some example of games that require a special attention.
- Late endgame exercise - Fujitsu 8 Game 6 - half-point win
- Late endgame exercise - Fujitsu 8 Game 9 - seki or not seki
- Late endgame exercise - Fujitsu 4 Game 16 - semeai
- Late endgame exercise - Amateur game 1
Sometimes I have been unable to understand how the recorded score was obtained. There are at least three possible explanations:
- I missed a tesuji or needed reinforcement - some records are very puzzling, see below,
- one of the player did not play the perfect moves because a less risky move won the game anyway - I have heard that this happens sometimes, but is very unlikely because professionals can easily play the perfect last endgame moves,
- there is a mistake in the game record.
Here are some examples of puzzling scores, that are still a mystery for me (I am sure someone will be able to explain these):
- Fujitsu 3 game 5 - winner inversion?
- -- more later --
--jvt
See also:
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