TsumegoFromGames127/Attempts

Sub-page of TsumegoFromGames127
[Diagram]

White to move, Black played black+circle

Herman: After W3, a and b are miai, as are c and d

tapir: This W1 gives black the chance to correct his mistake and save the four stones. Black can't cut anyway (he can cut, but white will live on the edge). W1 at W3 is my solution. Simple but nice.

[Diagram]

White to move, Black played black+circle

Herman: With B4, black can make ko here. Now if white a, black b results in ko for the life of the group on the right, while white b, black a results in a ko for the status of all the circled stones. Not an easy ko for black, but better than just defending with B4. So it is up to white, really. If white needs those center stones to win the game, he should play your W1 and get into this ko. If he just needs to live, then my W1 is better :-)

Herman: Ah, and on a further note: white will only get into this ko if he he needs the center stones to win the game. Which also means that after W5 takes the ko, B6 at a is probably a valid ko threat, because white cannot afford to let black save those stones...

tapir: Oh. :)


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