From a recent game of mine, white to play. I felt in control the whole game, but now I have a game-ending move. Should be easy!
$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O . O . O X O O . . X . X X . | $$ | . . . . O . . . O X X X O O . . . O . | $$ | . . . O X O . O . X . X X X O . . . . | $$ | . . . O X . X . O X . O . X X O O O . | $$ | . . O X X . . X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------
[go]$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O . O . O X O O . . X . X X . | $$ | . . . . O . . . O X X X O O . . . O . | $$ | . . . O X O . O . X . X X X O . . . . | $$ | . . . O X . X . O X . O . X X O O O . | $$ | . . O X X . . X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
I'll be curious to see what level of player is able to see this easily. My 5k opponent was taken completely by surprise; he said he doesn't recall seeing this move before. I (4k) was able to spot the tesuji very quickly, though I had to be careful to read out all the continuations.
I'm only a (very) weak player, so the following may be totally wrong. But it looks OK to me right now:
I think the move below effectively cuts off black's left-hand clump of stones, and thus kills them:
$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O . O . O X O O . . X . X X . | $$ | . . . . O . . . O X X X O O . . . O . | $$ | . . . O X O . O . X . X X X O . . . . | $$ | . . . O X a X b O X . O . X X O O O . | $$ | . . O X X . 1 X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------
[go]$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O . O . O X O O . . X . X X . | $$ | . . . . O . . . O X X X O O . . . O . | $$ | . . . O X O . O . X . X X X O . . . . | $$ | . . . O X a X b O X . O . X X O O O . | $$ | . . O X X . 1 X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
- essentially a and b seem to be miai to connect or cut (black needing both, so obviously he can't get them). Black can try an atari on 1, but that doesn't seem to change anything.
Assuming this is correct (and I may well have missed something - I'm only 12k on KGS and have lost my last several games there ), it took me quite a long time to see it, but mainly because, in a whole board problem, it takes that long to see what possibilities you have. (I spent most of my time trying to find ways to kill black's enormous dragon, but eventually concluded that it wasn't possible.) This technique seems to occur in a lot of 12k or 15k-rated problems on goproblems.com, so (again, this is assuming I'm right, and it works) I'm surprised a 5k hadn't come across it.
My idea would be to separate the black group from the rest of the board. Spotted within seconds.
$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O . O . O X O O . . X . X X . | $$ | . . . . O . . . O X X X O O . . . O . | $$ | . . . O X O . O . X . X X X O . . . . | $$ | . . . O X . X . O X . O . X X O O O . | $$ | . . O X X . 1 X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------
[go]$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O . O . O X O O . . X . X X . | $$ | . . . . O . . . O X X X O O . . . O . | $$ | . . . O X O . O . X . X X X O . . . . | $$ | . . . O X . X . O X . O . X X O O O . | $$ | . . O X X . 1 X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
Edit: This doesn't seem to be the whole story:
$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O 6 O . O X O O . . X . X X . | $$ | . . . . O 4 . . O X X X O O . . . O . | $$ | . . . O X O 5 O . X . X X X O . . . . | $$ | . . . O X 2 X 3 O X . O . X X O O O . | $$ | . . O X X . 1 X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------
[go]$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O 6 O . O X O O . . X . X X . | $$ | . . . . O 4 . . O X X X O O . . . O . | $$ | . . . O X O 5 O . X . X X X O . . . . | $$ | . . . O X 2 X 3 O X . O . X X O O O . | $$ | . . O X X . 1 X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
Then it will be a capturing race, and I am too exhausted to read it out who will win
Last edited by karaklis on Sun Oct 31, 2010 12:46 pm, edited 1 time in total.
$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O 8 O . O X O O . . X . X X . | $$ | . . . . O 6 . . O X X X O O . . . O . | $$ | . . . O X O 7 O . X . X X X O . . . . | $$ | . . . O X 3 X 2 O X . O . X X O O O . | $$ | . . O X X 4 1 X . . . . O X X O X X . | $$ | O . O X . O 5 . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------
[go]$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O 8 O . O X O O . . X . X X . | $$ | . . . . O 6 . . O X X X O O . . . O . | $$ | . . . O X O 7 O . X . X X X O . . . . | $$ | . . . O X 3 X 2 O X . O . X X O O O . | $$ | . . O X X 4 1 X . . . . O X X O X X . | $$ | O . O X . O 5 . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
My idea would be to separate the black group from the rest of the board. Spotted within seconds.
$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O . O . O X O O . . X . X X . | $$ | . . . . O . . . O X X X O O . . . O . | $$ | . . . O X O . O . X . X X X O . . . . | $$ | . . . O X . X . O X . O . X X O O O . | $$ | . . O X X . 1 X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------
[go]$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O . O . O X O O . . X . X X . | $$ | . . . . O . . . O X X X O O . . . O . | $$ | . . . O X O . O . X . X X X O . . . . | $$ | . . . O X . X . O X . O . X X O O O . | $$ | . . O X X . 1 X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
Edit: This doesn't seem to be the whole story:
$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O 6 O . O X O O . . X . X X . | $$ | . . . . O 4 . . O X X X O O . . . O . | $$ | . . . O X O 5 O . X . X X X O . . . . | $$ | . . . O X 2 X 3 O X . O . X X O O O . | $$ | . . O X X . 1 X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------
[go]$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O 6 O . O X O O . . X . X X . | $$ | . . . . O 4 . . O X X X O O . . . O . | $$ | . . . O X O 5 O . X . X X X O . . . . | $$ | . . . O X 2 X 3 O X . O . X X O O O . | $$ | . . O X X . 1 X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
Then it will be a capturing race, and I am too exhausted to read it out who will win
$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O 5 O . O X O O . . X . X X . | $$ | . . . . O 4 . . O X X X O O . . . O . | $$ | . . . O X O . O . X . X X X O . . . . | $$ | . . . O X 2 X 3 O X . O . X X O O O . | $$ | . . O X X . 1 X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------
[go]$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O 5 O . O X O O . . X . X X . | $$ | . . . . O 4 . . O X X X O O . . . O . | $$ | . . . O X O . O . X . X X X O . . . . | $$ | . . . O X 2 X 3 O X . O . X X O O O . | $$ | . . O X X . 1 X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
Li Kao wrote:
Complicated...
$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O 8 O . O X O O . . X . X X . | $$ | . . . . O 6 . . O X X X O O . . . O . | $$ | . . . O X O 7 O . X . X X X O . . . . | $$ | . . . O X 3 X 2 O X . O . X X O O O . | $$ | . . O X X 4 1 X . . . . O X X O X X . | $$ | O . O X . O 5 . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------
[go]$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O 8 O . O X O O . . X . X X . | $$ | . . . . O 6 . . O X X X O O . . . O . | $$ | . . . O X O 7 O . X . X X X O . . . . | $$ | . . . O X 3 X 2 O X . O . X X O O O . | $$ | . . O X X 4 1 X . . . . O X X O X X . | $$ | O . O X . O 5 . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O X O . O X O O . . X . X X . | $$ | . . . . O X . . O X X X O O . . . O . | $$ | . . . O X O O O . X . X X X O . . . . | $$ | . . . O X O X X O X . O . X X O O O . | $$ | . . O X X X O X 1 . . . O X X O X X . | $$ | O . O X . O O 2 X 3 X X X O O O X . . | $$ | . . . X O . O O 4 . . X O . O X X . . | $$ | X X X X . O X . 5 O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------
[go]$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O X O . O X O O . . X . X X . | $$ | . . . . O X . . O X X X O O . . . O . | $$ | . . . O X O O O . X . X X X O . . . . | $$ | . . . O X O X X O X . O . X X O O O . | $$ | . . O X X X O X 1 . . . O X X O X X . | $$ | O . O X . O O 2 X 3 X X X O O O X . . | $$ | . . . X O . O O 4 . . X O . O X X . . | $$ | X X X X . O X . 5 O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
Araban found the game line in his last diagram, which I think is the trickiest resistance. Those white stones in the K6 area seemed so amazingly, coincidentally convenient!
$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O . O . O X O O . . X . X X . | $$ | . . . . O . . . O X X X O O . . . O . | $$ | . . . O X O . O . X . X X X O . . . . | $$ | . . . O X . X . O X . O . X X O O O . | $$ | . . O X X . 1 X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------
[go]$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O . O . O X O O . . X . X X . | $$ | . . . . O . . . O X X X O O . . . O . | $$ | . . . O X O . O . X . X X X O . . . . | $$ | . . . O X . X . O X . O . X X O O O . | $$ | . . O X X . 1 X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
Seems like the best way to do it. Haven't read everything out, but I think you win any of the dangerous looking semeai variations.
$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O . O . O X O O . . X . X X . | $$ | . . . . O 5 4 . O X X X O O . . . O . | $$ | . . . O X O 2 O . X . X X X O . . . . | $$ | . . . O X 6 X 3 O X . O . X X O O O . | $$ | . . O X X . 1 X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------
[go]$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O . O . O X O O . . X . X X . | $$ | . . . . O 5 4 . O X X X O O . . . O . | $$ | . . . O X O 2 O . X . X X X O . . . . | $$ | . . . O X 6 X 3 O X . O . X X O O O . | $$ | . . O X X . 1 X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
fwiffo wrote:A lot of people are getting the first move, but nobody's reading out the continuation.
Yep, looks like I was guilty of that. I'd missed some of the ways black could make it difficult - I often do this in games; I guess that's why I'm only 12k
$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O . O . O X O O . . X . X X . | $$ | . . . . O 5 4 . O X X X O O . . . O . | $$ | . . . O X O 2 O . X . X X X O . . . . | $$ | . . . O X 6 X 3 O X . O . X X O O O . | $$ | . . O X X . 1 X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------
[go]$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O . O . O X O O . . X . X X . | $$ | . . . . O 5 4 . O X X X O O . . . O . | $$ | . . . O X O 2 O . X . X X X O . . . . | $$ | . . . O X 6 X 3 O X . O . X X O O O . | $$ | . . O X X . 1 X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
This was the sequence that was actually bothering me at first, but I think it can be remedied with a small preparation made beforehand.
$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X 2 O . . O X . . . . | $$ | . . . O . X . . 1 X . . O . . . . . . | $$ | . . O . O . O . O X O O . . X . X X . | $$ | . . . . O . . . O X X X O O . . . O . | $$ | . . . O X O . O . X . X X X O . . . . | $$ | . . . O X . X . O X . O . X X O O O . | $$ | . . O X X . . X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------
[go]$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X 2 O . . O X . . . . | $$ | . . . O . X . . 1 X . . O . . . . . . | $$ | . . O . O . O . O X O O . . X . X X . | $$ | . . . . O . . . O X X X O O . . . O . | $$ | . . . O X O . O . X . X X X O . . . . | $$ | . . . O X . X . O X . O . X X O O O . | $$ | . . O X X . . X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X B O . . O X . . . . | $$ | . . . O . X 7 . W X . . O . . . . . . | $$ | . . O . O . O . O X O O . . X . X X . | $$ | . . . . O 5 4 . O X X X O O . . . O . | $$ | . . . O X O 2 O . X . X X X O . . . . | $$ | . . . O X 6 X 3 O X . O . X X O O O . | $$ | . . O X X . 1 X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------
[go]$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X B O . . O X . . . . | $$ | . . . O . X 7 . W X . . O . . . . . . | $$ | . . O . O . O . O X O O . . X . X X . | $$ | . . . . O 5 4 . O X X X O O . . . O . | $$ | . . . O X O 2 O . X . X X X O . . . . | $$ | . . . O X 6 X 3 O X . O . X X O O O . | $$ | . . O X X . 1 X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O 5 O . O X O O . . X . X X . | $$ | . . . . O 4 7 . O X X X O O . . . O . | $$ | . . . O X O 6 O . X . X X X O . . . . | $$ | . . . O X 2 X 3 O X . O . X X O O O . | $$ | . . O X X . 1 X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------
[go]$$W $$ --------------------------------------- $$ | . O X X X . . . . O . . X . . . . . . | $$ | . O O O X . O X O . O . O X X . . . . | $$ | . . . O X . O O X O O O X O . X . . . | $$ | . . O X X X X X X , . . X X . X . . . | $$ | . . O X O . . . X . O . . O X . . . . | $$ | . . . O . X . . . X . . O . . . . . . | $$ | . . O . O 5 O . O X O O . . X . X X . | $$ | . . . . O 4 7 . O X X X O O . . . O . | $$ | . . . O X O 6 O . X . X X X O . . . . | $$ | . . . O X 2 X 3 O X . O . X X O O O . | $$ | . . O X X . 1 X . . . . O X X O X X . | $$ | O . O X . O . . X . X X X O O O X . . | $$ | . . . X O . O O . . . X O . O X X . . | $$ | X X X X . O X . . O . X O . O X O X . | $$ | X O O . . O X O . . . X X O X X . . X | $$ | O O . O . O X X X X X X O O O X X X O | $$ | . . . . O X X . O O O O . O X O O O O | $$ | . . . . O . . X O . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
I believe you still need to make that first move to prevent LiKao's example though, I don't see any way out of those complications once you start the cut
Araban found the game line in his last diagram, which I think is the trickiest resistance. Those white stones in the K6 area seemed so amazingly, coincidentally convenient!
That is what good shape does for you.
Still officially AGA 5d but I play so irregularly these days that I am probably only 3d or 4d over the board (but hopefully still 5d in terms of knowledge, theory and the ability to contribute).
Cool move! I'm probably boring, but I probably wouldn't even have looked for it, because white is already leading by 10+ points on the board in late endgame. Thus, any big yose should do the trick just as nicely. Still, it's a nice tesuji if you read it out all the way!
), it took me quite a long time to see it, but mainly because, in a whole board problem, it takes that long to see what possibilities you have. (I spent most of my time trying to find ways to kill black's enormous dragon, but eventually concluded that it wasn't possible.) This technique seems to occur in a lot of 12k or 15k-rated problems on goproblems.com, so (again, this is assuming I'm right, and it works) I'm surprised a 5k hadn't come across it.
