Leon Chen 4p’s Tsumego Challenge

Location Online
Director(s) Leon Chen (陳禧) 4p, Stephen Hu
Eligibility Open
Open or Invitational? Open


Leon Chen 4p’s Tsumego Challenge consists of 40 tsumego (life-and-death problems) of varying difficulty, generally ranked from easiest to most difficult. As a new side event of this year’s e-Go Congress, the Tsumego Challenge is designed to encourage all Go players to participate in problem-solving, improve their reading skills, and discover new methods and strategies which may help transform their game to the next level.

The 40 tsumego are divided into five levels: Elementary (20-11 kyu), Normal (10-6 kyu), Intermediate (5-1 kyu), Expert (1-4 dan) and Ultimate (5 dan and above), spanning over the course of eight days - one puzzle of each level will be posted per day. Participants have most of the day to work on the puzzles, submit their answers and (optionally) provide a brief justification of their thought processes. Solutions will be posted every evening during the live broadcasts on the official AGA Twitch channel, and the best challengers will be rewarded with free copies of Leon Chen 4p’s original tsumego collections.


Time and Date


Entries can be submitted here (possibly via Google Forms, link TBD).


Up to 10 prizes will be given out to the best-performing challengers, according to the following criteria:


Each prize-winning challenger will be granted a free copy of Spindrift and Planet, two original tsumego collections (136 puzzles each) by Leon Chen 4p and Stephen Hu. A valid OGS account will be required to access both collections. Further details TBD