Life In 19x19

I have never encountered such an interesting ko fight, and having gone through some of the possibilities, found a superko option and some other very interesting options as well, i'd love to see what some higher level players think. starts at move 239.



EDIT: fixed

First of all, this was a really stupid ko for white to get into in the first place, as it was easily avoidable.

Based on counting, black could have ignored the ko threat at A13 and won the game.

Then black makes a huge mistake and blows his undeserved opportunity at move 255.

Then moves 257, 261, 263, 265, 267, 269, 271, and 273 don't do anything. 257 and 273 actually lose points, and 265 and 271 both seem ignorable. Of course, white is clearly winning, so it doesn't hurt him to respond.

I don't see the triple ko you are talking about - care to show me?

DIV wrote:EDIT: can't seem to figure out why it's not working, but hopefully can get some comments on it, i'll try to fix tomorrow.

I copied-and-pasted your SGF data inline and it worked.
See "How to post SGF files," http://www.lifein19x19.com/forum/viewto ... ?f=5&t=833

yea coming back to it this morning it's less impressive to me, amateur game with amateur mistakes, haha. I could have sacrificed the four stones potentially cut by N19 to take that chunk and still keep life up top. Superko variant I found was due to some bad play, haha. Forget about that I suppose. White could definitely have stopped this whole issue by just playing to connect, but he didn't. I think it was a good learning experience concerning Ko for me.

i didnt really count but not answering 252 would've gave you a win.
when your opponent gives you free win..make sure to take them..then it will make you stronger

thanks for the commentary guys, and to Dusk Eagle specifically: With all those useless moves I guess I was just trying to find a move that he had to reply to twice, haha, so that I could take something else or get that large group in the ko fight. Thanks again all.