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| How superko can change a losing position into a winning one http://www.lifein19x19.com/viewtopic.php?f=45&t=17756 |
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| Author: | Gérard TAILLE [ Tue Sep 01, 2020 1:30 pm ] |
| Post subject: | How superko can change a losing position into a winning one |
Black to play and win I suppose we are using AGA rule (SSK) on a 5x5 board. The problem I propose is the following: Starting with an empty board, what is the minimum number of moves you need to build the above position such that black can play and win. Note : if for example you play 44 moves (22 pass for black + 22 white stones played by white) then the above position is a losing one for black because after a black move on "a" the position looks like a strange seki with only one black stone involved! Is this is true then it is a large win for white. You have to find something else and minimise the number of moves! |
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| Author: | Harleqin [ Tue Sep 01, 2020 3:43 pm ] |
| Post subject: | Re: How superko can change a losing position into a winning |
Why would that be a seki? |
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| Author: | Gérard TAILLE [ Wed Sep 02, 2020 1:48 am ] |
| Post subject: | Re: How superko can change a losing position into a winning |
Harleqin wrote: Why would that be a seki? The point is the following: after the sequence  pass on   on   on it follows and here my impression is that black cannot live somewhere on the board. Maybe I am not strong enough to show this and I hope stronger player will be able to confirm my impression. If it is true the position is seki because after we reach the position and now it appears to me that black can live with a better result than the initial position after black 1 |
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