Elementary ko
Problem 1
Black to play.
Interactive Puzzle
Problem 2
Black to play.
Problem 1
Black to play.
Problem 2
Black to play.
Problem 1
Black to play.
Problem 2
White to play.
Problem 1
Black to play.
Problem 2
Black to play.
Problem 1
Black to play.
Problem 2
White to play.
Problem 1
Black to play.
Problem 2
White to play.
Problem 1
Black to play.
Problem 2
White to play.
Problem 1
White to play.
Problem 2
White to play.
Problem 1
White to play.
Problem 2
Black to play.
Problem 1
Black to play.
Problem 2
Black to play.
Problem 1
Black to play.
Problem 2
White to play.
Problem 1
White to play.
Problem 2
White to play.
Problem 1
Black to play.
Problem 2
Black to play.
https://homepages.cwi.nl/~aeb/go/games/games/Shusai/index.html
Problem 1
Black to play.
Problem 2
White to play.
Problem 1
White to play.
Problem 2
White to play.
… you guess what
Problem 1
White to play.
Problem 2
Black to play.
Problem 1
White to play.
Problem 2
White to play.
Problem 1
Black to play.
Problem 2
White to play.