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mirrored listing x402 eip155:8453eip155:137eip155:42161

Chess Daily tactics puzzle — solve a deterministic UTC daily position from a pinned CC0 Li

Chess Daily tactics puzzle — solve a deterministic UTC daily position from a pinned CC0 Lichess subset using legal UCI moves.

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Claim this listing
5000 (raw units)
price
7
calls / 30d
4
unique payers
2026-09-15
updated

Provider

agent-arcade.use.x402atlas.com · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "5000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "5000",
    "maxTimeoutSeconds": 300
  }
]

Output schema

{
  "bazaar": {
    "category": "games",
    "info": {
      "input": {
        "method": "GET",
        "type": "http"
      },
      "output": {
        "example": {
          "attribution": {
            "dataset_sha256": "f4b9105b75d4a99557625016c69f5bcc2b60ce3664f0c74071b426e62f5f3294",
            "dataset_version": "lichess-puzzles-v1",
            "license": "CC0-1.0",
            "snapshot_date": "2026-07-29",
            "source": "Lichess puzzle database"
          },
          "challenge_id": "sha256:50697ebea7b2cc5947da85e12fe2069f49983c4ba3d206b09540d80733c0153a",
          "date": "2026-07-01",
          "difficulty": "normal",
          "game": "chess",
          "generation_version": "v1",
          "prompt": {
            "answer_format": "uci_move_array",
            "fen": "r4rk1/5ppp/1np2q2/p1b5/2p1B3/P7/1P3PPP/R1BQ1RK1 w - - 2 18",
            "puzzle_id": "00143",
            "rating": 1825,
            "side_to_move": "white",
            "themes": [
              "advantage",
              "middlegame",
              "short"
            ]
          },
          "rules": {
            "complete_principal_line_required": true,
            "maximum_moves": 16,
            "notation": "uci"
          }
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "additionalProperties": false,
              "description": "Chess Daily takes no query parameters; it always returns today's UTC tactics puzzle.",
              "properties": {},
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "additionalProperties": false,
              "description": "Chess Daily tactics challenge envelope.",
              "properties": {
                "attribution": {
                  "additionalProperties": false,
                  "description": "Chess Daily pinned dataset provenance.",
                  "properties": {
                    "dataset_sha256": {
                      "description": "SHA-256 of the packaged Chess Daily subset.",
                      "pattern": "^[0-9a-f]{64}$",
                      "type": "string"
                    },
                    "dataset_version": {
                      "description": "Pinned Chess Daily dataset version.",
                      "type": "string"
                    },
                    "license": {
                      "description": "Source dataset license.",
                      "type": "string"
                    },
                    "snapshot_date": {
                      "description": "Pinned source snapshot date.",
                      "format": "date",
                      "type": "string"
                    },
                    "source": {
                      "description": "Chess Daily puzzle source.",
                      "type": "string"
                    }
                  },
                  "required": [
                    "source",
                    "license",
                    "snapshot_date",
                    "dataset_version",
                    "dataset_sha256"
                  ],
                  "type": "object"
                },
                "challenge_id": {
                  "description": "Canonical content-addressed Chess Daily challenge identity.",
                  "pattern": "^sha256:[0-9a-f]{64}$",
                  "type": "string"
                },
                "date": {
                  "description": "UTC Chess Daily challenge date.",
                  "format": "date",
                  "type": "string"
                },
                "difficulty": {
                  "description": "Chess Daily challenge difficulty.",
                  "enum": [
                    "normal"
                  ],
                  "type": "string"
                },
                "game": {
                  "description": "Chess Daily game identity.",
                  "enum": [
                    "chess"
                  ],
                  "type": "string"
                },
                "generation_version": {
                  "description": "Pinned Chess Daily dataset-selection version.",
                  "enum": [
                    "v1"
                  ],
                  "type": "string"
                },
                "prompt": {
                  "additionalProperties": false,
                  "description": "Chess Daily solver position and puzzle metadata.",
                  "properties": {
                    "answer_format": {
                      "description": "Chess Daily expects an array of UCI moves.",
                      "enum": [
                        "uci_move_array"
                      ],
                      "type": "string"
                    },
                    "fen": {
                      "description": "FEN after the upstream setup move; the solver is on move",
                      "type": "string"
                    },
                    "puzzle_id": {
                      "description": "Pinned Lichess puzzle identifier.",
                      "type": "string"
                    },
                    "rating": {
                      "description": "Source puzzle rating.",
                      "type": "integer"
                    },
                    "side_to_move": {
                      "description": "Side the Chess Daily solver must play.",
                      "enum": [
                        "white",
                        "black"
                      ],
                      "type": "string"
                    },
                    "themes": {
                      "description": "Source tactical themes.",
                      "items": {
                        "type": "string"
                      },
                      "type": "array"
                    }
                  },
                  "required": [
                    "puzzle_id",
                    "fen",
                    "side_to_move",
                    "rating",
                    "themes",
                    "answer_format"
                  ],
                  "type": "object"
                },
                "rules": {
                  "additionalProperties": false,
                  "description": "Chess Daily legal-UCI and complete-principal-line requirements.",
                  "properties": {
                    "complete_principal_line_required": {
                      "const": true,
                      "type": "boolean"
                    },
                    "maximum_moves": {
                      "enum": [
                        16
                      ],
                      "type": "integer"
                    },
                    "notation": {
                      "enum": [
                        "uci"
                      ],
                      "type": "string"
                    }
                  },
                  "required": [
                    "notation",
                    "complete_principal_line_required",
                    "maximum_moves"
                  ],
                  "type": "object"
                }
              },
              "required": [
                "challenge_id",
                "game",
                "generation_version",
                "date",
                "difficulty",
                "prompt",
                "rules",
                "attribution"
              ],
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    },
    "tags": [
      "chess-puzzle",
      "chess-tactics",
      "daily-chess",
      "fen",
      "uci",
      "agent-game",
      "reasoning"
    ]
  }
}

Use it

curl

curl "https://agent-arcade.use.x402atlas.com/chess/daily"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://agent-arcade.use.x402atlas.com/chess/daily");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://agent-arcade.use.x402atlas.com/chess/daily")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Machine-readable

Everything on this page is also available as clean JSON at /resources/2220.json, and this resource appears in /discovery/resources and /discovery/search.