Jev vs. Stockfish Chess Harness

Ryan Fitzpatrick tried a harness for Jev to play chess against Stockfish, but Jev had no chance. He is still exploring uses for Jev beyond replacing behavior trees for enemy AI.

View on X

Ryan Fitzpatrick@rfitzpatrick_io𝕏

I tried a harness for jev to play chess against stockfish, jev had no chance. Still trying to figure out what to do with jev, other than replacing behavior trees for enemy AI.

Sep 23, 2026X postsView on X

Also filed under Games & real time

Game Agents Powered by Jev
Pitofui integrated Jev into a game and ran it alongside Sonnet Fast.
Jev Plays DOOM
Jev reads structured state exported by the game and selects targets and behaviors, while a controller executes specific actions.
Jev Plays The King of Fighters
Jev decides moves for a computer-use agent playing The King of Fighters from Steam on Windows. Sai navigates to start the game and chooses a character, while Jev decides the next move.
DiffusionGemma-Jev Solves Solitaire
Espen JD built DiffusionGemma-Jev, a Jev-style classifier using DiffusionGemma and vLLM, that solved solitaire on an RTX PRO 6000 in 22 seconds.