Longest Ladder Problem

The following problem called "Labyrinth" was created by Ralf Gering (at this time 5 Kyu) in 1984 and published in the Deutsche Go-Zeitung. Ralf also invented Magnetic Go.

The difficulty is to make the capturing sequence at least 300 moves long.

Black to play. Can he save his marked stone?  

The solution, which looks more like a spiral than a ladder, takes 314 moves.

/Solution

Black to play. Can he save his marked stone?  

Another spiral ladder setup