LongestLadderProblem/Solution

The answer is "no!".

[Diagram]
The first side.  

Note the opening sequence, which is forced. Then a is the only direction, which works.

[Diagram]
The next 3 sides...  

The key to the puzzle is seeing that White can turn Black back against the stones again... into a spiral. If you haven't read ahead for the rest yet, do so before scrolling down, it's very rewarding to have read that many moves ahead!

[Diagram]
The pattern emerges... read the rest of the way!  
[Diagram]
Atari!  

hotcoffee: Black probably regrets not tenuki-ing after the very first white move...

Harry Fearnley: When White plays atari at _1_, why does Black not simply capture all the white stones by playing at _a_?

fractic: When White plays W1 the white chain has two liberties left. One at a and the other one under B2.


LongestLadderProblem/Solution last edited by fractic on August 31, 2008 - 03:59
RecentChanges · StartingPoints · About
Edit page ·Search · Related · Page info · Latest diff
[Welcome to Sensei's Library!]
RecentChanges
StartingPoints
About
RandomPage
Search position
Page history
Latest page diff
Partner sites:
Go Teaching Ladder
Goproblems.com
Login / Prefs
Tools
Sensei's Library