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Ongoing Game 1 Move 249
Path: Endgame · Prev: CountingProblem1 · Next: OngoingGameOneUpperRightYose
Difficulty: Beginner Keywords: EndGame, Ongoing game
In Ongoing Game 1 Black 249 is a response to White's one-point sente play. It is obviously large enough to require a response, but it still may be instructive to evaluate it. :-)
Black can reply at a, making ko. The ko is complicated, but does not seem to gain anything on average, by comparison with simply filling. The worst that Black threatens is to take Now let's look at the follow-ups.
After
White takes away the rest of the points at stake. Now we can make a game tree: A / \ / \ 5 B / \ 2 0 A stands for the original position, B stands for the position after White plays. We reckon that Black has 1 point of potential territory at B, the average of the result of Black's gote and White's gote. Each gote play from B gains 1 point, so they have a miai value of one point. Similarly, we reckon that Black has 3 points of potential territory at A, and that a play at A is worth 2 points. (Note: B is actually ambiguous. Instead of taking gote White can simply play at 3 with sente. Well, sort of sente. The position after White 3 is also ambiguous. None of that affects the value of B, or A.) -- Bill Spight Path: Endgame · Prev: CountingProblem1 · Next: OngoingGameOneUpperRightYose This is a copy of the living page "Ongoing Game 1 Move 249" at Sensei's Library. ![]() |