chessjev-byte-v1

Chess-specialized one-pass option scorer. Architecture follows the public jevlike interface (context + N text options → N probabilities) with an original ChessJev implementation.

This is not TypeSafe Jev and is not OpenJev 4B. It is a small byte-embedding model trained on synthetic chess rows (FEN context, legal UCI options, label = heuristic/tactical teacher). No Elo or calibration claim versus Jev.

Files

• model.pt — PyTorch checkpoint (OptionAttentionScorer)
• config.json — architecture hyperparameters

Use

from pathlib import Path
from chess_jev.model import load_checkpoint

model = load_checkpoint(Path("model.pt"))

Train:

PYTHONPATH=src python -m chess_jev.train --data data/chessjev --output checkpoints/chessjev-byte-v1/model.pt