Im working through All about L&D again. I try to look at some deviations of the explained main lines and wanted to have a place where i can put some doubtful insights, so others can have my doubts too.
Im beginning with a standard fail attack on the haned L+1 Group with leg on the short side.
$$W $$ -------------- $$ | 5 . . b X . . $$ | 2 1 X X O O . $$ | 3 a X O . . . $$ | 4 X X O . . . $$ | . O O O . . . $$ | . . . . . . .
[go]$$W elsewhere $$ -------------- $$ | O . . 3 X . . $$ | c O X X O O . $$ | O X X O . . . $$ | X X X O . . . $$ | 1 O O O . . $$ | . . . . . . .[/go]
And now at c fights the ko: An one approach move ko If White plays at 3 first :
$$W at and at $$ -------------- $$ | O 2 3 1 X . . $$ | . O X X O O . $$ | O X X O . . . $$ | X X X O . . . $$ | . O O O . . $$ | . . . . . . .
[go]$$W at and at $$ -------------- $$ | O 2 3 1 X . . $$ | . O X X O O . $$ | O X X O . . . $$ | X X X O . . . $$ | . O O O . . $$ | . . . . . . .[/go]
$$W Lives in double ko $$ -------------- $$ | O . O 6 X . . $$ | . O X X O O . $$ | O X X O . . . $$ | X X X O . . . $$ | . O O O . . $$ | . . . . . . .
[go]$$W Lives in double ko $$ -------------- $$ | O . O 6 X . . $$ | . O X X O O . $$ | O X X O . . . $$ | X X X O . . . $$ | . O O O . . $$ | . . . . . . .[/go]
The other variant with b in the first diagram:
$$W elsewhere fights the ko $$ -------------- $$ | O 2 3 X X 5 . $$ | . O X X O O . $$ | O . X O . . . $$ | X X X O . . . $$ | 1 O O O . . . $$ | . . . . . . .
[go]$$W elsewhere fights the ko $$ -------------- $$ | O 2 3 X X 5 . $$ | . O X X O O . $$ | O . X O . . . $$ | X X X O . . . $$ | 1 O O O . . . $$ | . . . . . . .[/go]
In both cases we have an approach move ko and the only difference is the sacrifice point at .
One of my late night games ended in an interesting fight. I sure did some serious bad thing to let me split that easily. I tried to get my way out somehow and tried every turn. At move 93 my opponent somehow stumbled. I tried to find the right answer afterwards, but only with mediocre results.
30 and 32 seem a bit sheepish. There's no sense in giving atari at B13 if you don't plan to play the ko, right? After 32, you've taken gote twice, but you've gotten a worse result than if you had, for example, played B13 at B12.
Im doing the graded Go problems 3 at the moment, cause i only want to bruise through problems right now and am too lazy to think hard. Still funny what mistakes i can make with these ddk problems. Today I had to stop and think at one problem for fifteen minutes to get it wrong after all.
[go]$$B Soulution 2 11 at a $$ +---------------------+ $$ | . 5 . 6 a . . . . . | $$ | 9 1 4 O 3 . . . . . | $$ | 8 2 . O X . X . . . | $$ | 7 O O X X . . . , . | $$ | 0 X X . . . . . . . | $$ | . . . . . . . . . . | $$ | . X . . . . . . . . | $$ | . . . . . . . . . . | $$ +---------------------+[/go]
I thought the first to be better cause no outside assumptions are needed one space down left. I looked at the solution and mine wasn't there. (deviation at at soution 1). If you like, refute. My tries are somewhat doubtful, like always at these damn corners.
$$Bc Refutation ? $$ +---------------------+ $$ | . 5 b . . . . . . . | $$ | 4 1 3 O a . . . . . | $$ | . 2 . O X . X . . . | $$ | . O O X X . . . , . | $$ | . X X . . . . . . . | $$ | . . . . . . . . . . | $$ | . X . . . . . . . . | $$ | . . . . . . . . . . | $$ +---------------------+
I really had problems against the 8 kyus on wbaduk, but now i beat up the 6 kyu's like i did with the nerds in school. must be a mood thing. Today winnig is fashion, Maybe tomorrow is a losin day.
at c fights the ko: An one approach move ko
at 
fights the ko
.
.
at soution 1). If you like, refute. 
also live is just 3 points smaller.