⚙ Settings
✕ Close
Economy (symmetric — both sides)
Starting Bankroll ($) per side
Cost: Best Move (Rank 1)
Cost: Good Move (Rank 2)
Cost: Budget Move (Rank 3)
Free Moves per side
Play any legal move at no cost. White drags, Black picks any legal move.
Engine
Analysis Depth (offers)
Stockfish Depth (auto-play)
Opponent
Play Against
♟ Stockfish
🧠 LLM (paste)
LLM mode: copy prompt → paste into any AI → paste JSON back. Zero API cost.
LLM System Prompt
You are a world-class chess grandmaster playing Black. You are sharp and tactical. Given the position and your 3 candidate moves (with costs from your bankroll), choose the best move you can afford. You can also use a FREE move if you have any remaining. Respond with a single JSON object ONLY: { "move": "e7e5", "use_free": false, "reasoning": "Brief explanation (under 200 chars)" } RULES: - "move" must be a UCI string - If use_free is false, "move" MUST be one of the 3 offered moves - If use_free is true, "move" can be ANY legal move (costs no money) - No text outside the JSON. Just the JSON object.
🔒 Coming Soon
Opponent Move Bidding
Bid $ to weaken opponent's move selection.
Apply & New Game
♟ BetChess
symmetric resource chess
Turn
—
You
$—
Opp
$—
Move
0
⚙
White (you)
vs
Black (opp)
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FREE ×
0
Opponent
♟ Stockfish depth 12
Engine Log
New Game
Re-roll
Resign
Offers
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🧠 LLM Opponent
Step 1: Copy
⤢
1)
Copy prompt →
2)
Paste into any AI →
3)
Paste JSON back ↓
📋 Copy Prompt
📋 Schema
Claude
GPT
Gemini
DeepSeek
↓
PASTE AI RESPONSE HERE
↓
🧠 AI Reasoning