agentic-sudoku.vercel.app

undo_move

Take back the most recent change to the Sudoku board -- exactly what the human's own Undo button does, and reversible by them in the same way. Rows are numbered 1-9 top to bottom, columns 1-9 left to right, and boxes 1-9 in reading order. It always takes back the LAST change, whoever made it: yours or theirs. The result tells you which, so you can say what you just took back. A change that touched several cells at once, such as filling every pencil mark, is taken back whole in a single step. There is nothing to undo on a board where nothing has been changed yet, and the call is refused while the board is paused. There is no redo, so a change you take back is gone. Requires explanation: one or two sentences saying why you are taking this back, which the human sees.

Input schema

{
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "explanation": {
      "type": "string",
      "minLength": 20,
      "maxLength": 240
    }
  },
  "required": [
    "explanation"
  ]
}