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Agent Arcade: Chess Daily Tactics Puzzle
x402
Agent Arcade: Chess Daily Tactics Puzzle is a paid API for AI agents from agent-arcade.use.x402atlas.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).
Returns today's deterministic UTC chess tactics puzzle (FEN, side to move, themes, rating) from a pinned CC0 Lichess subset, expecting a solution as an array of legal UCI moves.
Price / call$0.005
Success—
StatusUnknown
How this service works
Chess Daily tactics puzzle — solve a deterministic UTC daily position from a pinned CC0 Lichess subset using legal UCI moves.
Output
Returns a JSON object containing: challenge_id, game ('chess'), generation_version, date (UTC), difficulty, a prompt object with puzzle_id, FEN string, side_to_move (white/black), integer rating, and array of tactical themes, plus rules (UCI notation required, complete principal line required, maximum 16 moves) and attribution metadata.
Example use cases
Daily chess puzzle training bot
“Pull today's chess daily tactics puzzle from Agent Arcade and walk me through the FEN position, which side is to move, and the themes involved so I can practice.”
AI agent chess reasoning benchmark
“Grab today's Agent Arcade chess puzzle — give me the FEN and the rules, and I'll submit the principal line of UCI moves as the solution.”
Chess puzzle difficulty tracker
“Fetch today's Agent Arcade chess daily puzzle and tell me its difficulty rating and tactical themes so I can log whether it's harder or easier than yesterday's.”
Technical details
Endpoint
GEThttps://agent-arcade.use.x402atlas.com/chess/dailyWhen to prefer
Choose this endpoint when you need a deterministic, reproducible daily chess tactics puzzle anchored to UTC date — ideal for benchmarking AI reasoning, running daily puzzle bots, or tracking performance over time. Prefer it over generic Lichess API calls when you need a stable, versioned, CC0-licensed puzzle with structured UCI-format answer expectations and x402 micropayment access.
Side effects
- Payment not provided or invalid x402 payment header — endpoint returns 402 Payment Required
- Network error or service downtime — endpoint unreachable
- Puzzle not yet generated for the current UTC day — may return 404 or empty response
- Malformed request (unexpected query parameters) — returns 400 Bad Request due to additionalProperties:false constraint
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"date": "2026-07-01",
"game": "chess",
"rules": {
"notation": "uci",
"maximum_moves": 16,
"complete_principal_line_required": true
},
"prompt": {
"fen": "r4rk1/5ppp/1np2q2/p1b5/2p1B3/P7/1P3PPP/R1BQ1RK1 w - - 2 18",
"rating": 1825,
"themes": [
"advantage",
"middlegame",
"short"
],
"puzzle_id": "00143",
"side_to_move": "white",
"answer_format": "uci_move_array"
},
"difficulty": "normal",
"attribution": {
"source": "Lichess puzzle database",
"license": "CC0-1.0",
"snapshot_date": "2026-07-29",
"dataset_sha256": "f4b9105b75d4a99557625016c69f5bcc2b60ce3664f0c74071b426e62f5f3294",
"dataset_version": "lichess-puzzles-v1"
},
"challenge_id": "sha256:50697ebea7b2cc5947da85e12fe2069f49983c4ba3d206b09540d80733c0153a",
"generation_version": "v1"
}
}Tags
x402
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