After you've mastered the basic way of thinking of life-and-death, the next step is to master, one by one, new techniques. The present problem is a good example. If you don't know the technique involved here, you may not guess it no matter how long you think.
Author vougalar Created 2015-03-07
Difficulty 2 dan (history) Source varius
AVG solve time 31 sec Stars 3.6  (5 votes)
User attempts 209 / 531 Collections The Top Ten Life-and-Death Problems
Genre life and death โ“’ Your attempts N/A
Similar problems
Created 2015-03-07
Source varius
Stars 3.6  (5 votes)
Collections The Top Ten Life-and-Death Problems
Your attempts N/A