Please rate the puzzles if you like them. I also appreciate any feedback about the collection, or about missing move sequences in the puzzles. Thanks!

This collection collects all 900 Cho Chikun Encyclopedia of Life and Death (Elementary) problems and solutions in one single place.

This follows the partial collections compiled by several people on OGS:

• Problems 1 - 189 by sunspark (not actively maintained anymore)
• Problems 190 - 312 by pi314ever
• Problems 350 - 428 by ovijol (solutions only up to problem 410)
• Problems 500 - 699 by ovijol
• Problems 700 - 810 by Wasser Bjorn

For now I am concentrating on the missing puzzles (starting with 313-349) and trying to make annotated solutions (much like in pi134ever’s puzzles) for puzzles 1 to 189. For the puzzles I cover, I am also trying to provide more explanations to some of the solutions, such as describing the follow-up moves for both players after a Ko.

WORK IN PROGRESS

Currently done with puzzles 1-117, 170, 188, 218, 313-317, 533.

This is a bit time consuming; I am not sure how far I will go with this.

notes to self: 203, 219 (https://online-go.com/demo/view/346700)