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L & D for professionals http://www.lifein19x19.com/viewtopic.php?f=15&t=1426 |
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Author: | Magicwand [ Thu Aug 19, 2010 4:54 am ] |
Post subject: | L & D for professionals |
for those who want to solve professional level LD problem. top professionals in Korea(choi chulhan, kim jisuk, and few more) could not solve this problem for 20 minute and gaveup. but someone claimed that there is an answer to this problem. lets see if anyone here can solve this problem. edit: i cound not solve this and i dont have answer. i am hoping someone or i can comeup with correct answer soon. |
Author: | gowan [ Thu Aug 19, 2010 5:41 am ] |
Post subject: | Re: L & D for professionals |
Magicwand wrote: for those who want to solve professional level LD problem. top professionals in Korea(choi chulhan, kim jisuk, and few more) could not solve this problem for 20 minute and gaveup. but someone claimed that there is an answer to this problem. lets see if anyone here can solve this problem. Black to play right? |
Author: | kirkmc [ Thu Aug 19, 2010 6:06 am ] |
Post subject: | Re: L & D for professionals |
How do you know it's even solvable? In other words, assuming it's black to play, are you sure that black can kill? |
Author: | Magicwand [ Thu Aug 19, 2010 6:37 am ] |
Post subject: | Re: L & D for professionals |
gowan wrote: Black to play right? yes black to play. i saw the video and many professionals tried ![]() |
Author: | Magicwand [ Thu Aug 19, 2010 6:39 am ] |
Post subject: | Re: L & D for professionals |
kirkmc wrote: How do you know it's even solvable? In other words, assuming it's black to play, are you sure that black can kill? i am pretty sure there is an answer. according to the video one website made a page dedicated to this problem. i am thinking they will not do that if it has no solution. |
Author: | prokofiev [ Thu Aug 19, 2010 7:56 am ] |
Post subject: | Re: L & D for professionals |
A few thoughts that are perhaps obvious: It seems that if you don't play O19, White gets an easy eye: Edit: Nevermind. I had some idea about ignoring M19, but it clearly does not work... |
Author: | Numsgil [ Thu Aug 19, 2010 10:29 am ] |
Post subject: | Re: L & D for professionals |
Hmm, when you dig in to this problem there are some interesting half-sequences to consider. Consider the usual fundamentals for L&D: reduce eye space to a killable shape and then play the vital point. So let's consider the hane on the right. Anyway, those are my thoughts. Maybe a stronger player can take them and run with it. |
Author: | prokofiev [ Thu Aug 19, 2010 10:54 am ] |
Post subject: | Re: L & D for professionals |
Numsgil: In your last diagram, white can play 2 at J17 and make an eye easily. |
Author: | Cassandra [ Thu Aug 19, 2010 11:09 am ] |
Post subject: | Re: L & D for professionals |
Numsgil wrote: Hmm, when you dig in to this problem there are some interesting half-sequences to consider. Consider the usual fundamentals for L&D: reduce eye space to a killable shape and then play the vital point. So let's consider the hane on the right. White will not die with the sequences shown. |
Author: | Numsgil [ Thu Aug 19, 2010 11:43 am ] |
Post subject: | Re: L & D for professionals |
@Cassandra: @prokofiev: |
Author: | ethanb [ Thu Aug 19, 2010 10:17 pm ] |
Post subject: | Re: L & D for professionals |
Q18 is interesting. How does white respond? |
Author: | unkx80 [ Thu Aug 19, 2010 11:10 pm ] |
Post subject: | Re: L & D for professionals |
I haven't found any solution yet. @ethanb: How do you deal with the following? |
Author: | Cassandra [ Thu Aug 19, 2010 11:15 pm ] |
Post subject: | Re: L & D for professionals |
@Numsgil: You have to mind the order of moves ![]() |
Author: | ethanb [ Thu Aug 19, 2010 11:54 pm ] |
Post subject: | Re: L & D for professionals |
unkx80 wrote: I haven't found any solution yet. @ethanb: How do you deal with the following? At least I never claimed to not be an idiot ![]() But I still feel good about Q18 - I'm going to study it some and see if there's a non-obvious sequence after Q17. Under the stones eye stealing or something, maybe. |
Author: | Cassandra [ Fri Aug 20, 2010 2:54 am ] |
Post subject: | Re: L & D for professionals |
ethanb wrote: But I still feel good about Q18 - I'm going to study it some and see if there's a non-obvious sequence after Q17. Under the stones eye stealing or something, maybe. Preventing White's Sente on the left immediately ... |
Author: | ethanb [ Fri Aug 20, 2010 11:10 pm ] |
Post subject: | Re: L & D for professionals |
Cassandra wrote: Preventing White's Sente on the left immediately ... |
Author: | Cassandra [ Sat Aug 21, 2010 12:25 am ] |
Post subject: | Re: L & D for professionals |
ethanb wrote: "@ Cassandra: '... are you sure?'" Yes. |
Author: | cyclops [ Sat Aug 21, 2010 2:10 pm ] |
Post subject: | Re: L & D for professionals |
prokofiev wrote: A few thoughts that are perhaps obvious: It seems that if you don't play O19, White gets an easy eye: Edit: Nevermind. I had some idea about ignoring M19, but it clearly does not work... I'm not sure what is wrong with your B1. B5&r19 next in your diagram seems to kill W. Or?? |
Author: | Joaz Banbeck [ Sat Aug 21, 2010 3:38 pm ] |
Post subject: | Re: L & D for professionals |
ethanb wrote: |
Author: | Cassandra [ Sun Aug 22, 2010 12:19 am ] |
Post subject: | Re: L & D for professionals |
cyclops wrote: I'm not sure what is wrong with your B1. ... |
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