react-chess

{
  "type": "object",
  "properties": {
    "question": {
      "type": "string",
      "description": "Puzzle prompt shown to the student. Task only, no spoiler. Squares MUST be English algebraic: files a–h and ranks 1–8 (e4, f7, h5). Never transliterate squares. Words may be any language. Moves MUST use long algebraic notation (LAN) so hover can draw the arrow from the exact piece: e2-e4, e7-e5, Ng1-f3, Nb8-c6, Bf1-c4. Captures: e4xd5, Bf1xc4. Never write short SAN for a move (not 1.e4, not e5, not Nf3, not Bc4, not Qh5) — that only highlights the destination, as if the piece is unknown. Bare squares (e4, f7) name a location, not a move. Castling may stay O-O / O-O-O."
    },
    "type": {
      "type": "string",
      "enum": [
        "click-square",
        "click-piece",
        "choose-move"
      ]
    },
    "correct": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Acceptable squares such as [\"e5\", \"e4\"]"
    },
    "hint": {
      "type": "string",
      "description": "Optional private nudge to use only after they tap Give me a hint in chat. Never put this in question. Not shown on the chess page. Squares MUST be English algebraic: files a–h and ranks 1–8 (e4, f7, h5). Never transliterate squares. Words may be any language. Moves MUST use long algebraic notation (LAN) so hover can draw the arrow from the exact piece: e2-e4, e7-e5, Ng1-f3, Nb8-c6, Bf1-c4. Captures: e4xd5, Bf1xc4. Never write short SAN for a move (not 1.e4, not e5, not Nf3, not Bc4, not Qh5) — that only highlights the destination, as if the piece is unknown. Bare squares (e4, f7) name a location, not a move. Castling may stay O-O / O-O-O."
    }
  },
  "required": [
    "question",
    "correct"
  ]
}