When Black has six stones in a row, White can not kill the stones. -
fails after
.
Bill: doesn't look too good to me. How about white "a" or white "b"?
SGBailey: ' at a appears to be handled by
' between a and 6. There are potential throw-ins and other complicated stuff depending what path White wriggles with.
Bill: I think White can kill, then.
torij?: Actually, if white wants to do something it is better to play w1 at b2 and make a gote seki. Since playing here is gote for either side, black most like as not lives in endgame.
SGBailey: ' at b gets
' at a.
Kevin?: Title says 'Six Live' but these sequences only show death or seki for black. Quite confusing.
Bill: The sequence that Steve and I discussed last had no diagram. I just put it in, along with another diagram for life. Besides, seki is a form of life.
Can someone show how to live or kill with five ?
Isn't this an application of the above? With 5, whomever has sente can effectively reduce it to 4 or expand to 6. No?
Slowman: How about this? (Please check it :-))
zephi? Unfortunately, 5 on the 3rd line dies even if b has sente. After 6, b can't get 2 eyes. (note: playing b5 one space to the left doesn't work either)
nachtrabe: Sure that isn't a seki?
Chris Hayashida: at
? Then when the outside liberties are filled, White can atari from the inside and make a bulky five shape, killing Black.
kevinwm: The shape shown first is a sente seki for w. Playing 6 at 7 makes it death. Stones 8 and 9 below are miai for seki.
SGBailey: The comb formation lives.
torij?: The gote move of 4 in SGBailey's diagram seems to be the wrong approach. Aiming for the vital point before playing a hane is key. Black has a difficult time answering this because 'a' becomes a ko and anything that doesn't reduce white's liberties will allow white to play 'b'.