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| Crazy spot in 9x9 board http://www.lifein19x19.com/viewtopic.php?f=4&t=5812 |
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| Author: | Drewch [ Wed Apr 11, 2012 1:44 pm ] |
| Post subject: | Crazy spot in 9x9 board |
 The Cherio on the stone signifies the last stone played. There is a potential triple Ko here (I think?) Is this a draw? Can someone win here? This is the weirdest spot I've seen in a 9x9. (Note: we're covering up part of a 19x19 board to get our 9x9, so the stones on the right are actually on the edge of the board) |
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| Author: | Joaz Banbeck [ Wed Apr 11, 2012 2:33 pm ] |
| Post subject: | Re: Crazy spot in 9x9 board |
No. W group has only 2 relevant los |
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| Author: | amnal [ Wed Apr 11, 2012 2:53 pm ] |
| Post subject: | Re: Crazy spot in 9x9 board |
I can only get triple ko, nothing better for either player if the other plays right. Edit: Included shoddily constructed sgf. Position appears at move 47 on the second game branch. |
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| Author: | topazg [ Wed Apr 11, 2012 2:58 pm ] |
| Post subject: | Re: Crazy spot in 9x9 board |
Joaz Banbeck wrote: No. W group has only 2 relevant los 3, no? |
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| Author: | emeraldemon [ Wed Apr 11, 2012 3:03 pm ] |
| Post subject: | Re: Crazy spot in 9x9 board |
I think white can live: make an eye in sente and then black can't fill the kos, so white kills from the outside: |
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| Author: | amnal [ Wed Apr 11, 2012 3:08 pm ] |
| Post subject: | Re: Crazy spot in 9x9 board |
emeraldemon wrote: I think white can live: make an eye in sente and then black can't fill the kos, so white kills from the outside: Is it as simple as that? White has big shortage of liberty problems around D2, as per below. But I could be missing something obvious! In the second case, I still keep getting triple ko. Even if white can get D2 and/or get an eye, black has a sort of eye around H9 because of white's inability to play F9 in proper sente. Edit: I thought this worked, but even here it is triple ko but with the top ko moved a bit? (Edit 2: It turns out that this doesn't work, as per below) |
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| Author: | emeraldemon [ Wed Apr 11, 2012 3:13 pm ] |
| Post subject: | Re: Crazy spot in 9x9 board |
Arggh, you're right. I still think H2 might be the best move though: Black has to make a lot of approach moves to win this... |
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| Author: | amnal [ Wed Apr 11, 2012 3:21 pm ] |
| Post subject: | Re: Crazy spot in 9x9 board |
emeraldemon wrote: Arggh, you're right. I still think H2 might be the best move though: Black has to make a lot of approach moves to win this... Yes, I think this works for white, it nicely combines two losing variations I had by playing the moves in the right order 
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| Author: | Joaz Banbeck [ Wed Apr 11, 2012 3:49 pm ] |
| Post subject: | Re: Crazy spot in 9x9 board |
"Liberty County Nightmare", now showing in a double feature with "Attack of the Mutant Spell Checkers". |
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| Author: | Drewch [ Wed Apr 11, 2012 5:42 pm ] |
| Post subject: | Re: Crazy spot in 9x9 board |
Thanks guys, I was so confused I couldn't figure out what was the proper play by both players. |
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