Jev Chess Lab

# Jev Chess Lab

Six recorded chess experiments with TypeSafe Jev via OpenRouter: independent play,
a tactical filter, Stockfish assistance, and a return to Jev-only play.

**The Stockfish-assisted system won. Independent Jev still blunders pieces.
Assisted results are not evidence that Jev became a strong chess player.**

**[Watch all games](https://denikuchero.github.io/jev-chess-lab/)** ·
[Research notes (Русский)](docs/RESEARCH_RU.md) · [Usage (Русский)](docs/USAGE_RU.md)

## Watch directly on GitHub

Full-game looping GIFs, one ply per second. These are rendered replays, **not real-time recordings**.
Click a GIF to open the interactive board with step-by-step controls.

### 06 — Jev proposes, reviews three moves, then chooses (new)

No chess advisor. Jev changed its first choice on 16/23 turns, but still lost
by checkmate. 115 API calls, $0.008995; no reliable strength gain established.

[](https://denikuchero.github.io/jev-chess-lab/games/06-jev-review-loop/replay.html)

### 05 — Jev alone: explicit piece descriptions

Stopped at the 60-call budget, **unfinished**, not a draw. Jev still blundered
pieces and repeatedly moved its rook between d1 and e1. This prompt experiment
did not establish a playing-strength improvement.

[](https://denikuchero.github.io/jev-chess-lab/games/05-pure-explicit-pieces/replay.html)

### 02 — Jev with a tactical filter (assisted)

This version discarded some blunders in code; it does not represent unaided Jev.

[](https://denikuchero.github.io/jev-chess-lab/games/02-guarded/replay.html)

### 01 — Jev alone: original prompt

[](https://denikuchero.github.io/jev-chess-lab/games/01-raw/replay.html)

### 04 — Jev alone: longer instructions and full history

[](https://denikuchero.github.io/jev-chess-lab/games/04-pure-history/replay.html)