Introducing Yonkoma by Mark Steere
Slide your two checkers towards the enemy pair; whoever completes a crosscut loses
We're delighted to introduce you to a new game on PlayStrategy, Yonkoma. It's played on a 10x10 or 12x12 board.
Mark Steere, in collaboration with Claude, an AI model made by Anthropic, designed Yonkoma in October 2026.
The aim of the game is to slide your checkers towards the enemy pair and avoid completing a crosscut. A crosscut is a 2x2 block of squares holding all four checkers, with the two white checkers on one diagonal of the block and the two black checkers on the other. If you complete the crosscut you lose. To learn more, please read our rules page.
As with any new game on PlayStrategy, you can play our greedy bots including @PS-Greedy-Two-Move. We have an Introductory Tournament for each new variant with your chance to win a one-off trophy for the variant!
Yonkoma 10x10 Introductory - 10:00 UTC Saturday 14th Nov
Yonkoma 12x12 Introductory - 10:00 UTC Sunday 15th Nov
The new games will join the rest of the PlayStrategy tournament schedule.
We hope you continue to enjoying playing on PlayStrategy!