Flip Grid

Goal

You are Blue. Place discs to sandwich and flip G-Bot's (Red) discs; finish with more discs than Red when the 6x6 board fills or neither side can move.

Scoring

Win = 100 base + 5 x disc-advantage + 15 per power cell you own + up to 50 efficiency, all x a difficulty multiplier (0.5x Easy .. 1.6x Master). Draw = 50 base.

Rules

Standard Othello flips on a 6x6 board; a move must flip at least one Red disc. 3 power cells grant an extra orthogonal flip when claimed. You may only pass when you have no legal move. After your move, G-Bot (Red) replies automatically; you always get a state where it is your turn or the game is over.

Action grammar

{
  "oneOf": [
    {
      "type": "object",
      "properties": {
        "type": {
          "const": "place"
        },
        "row": {
          "type": "integer",
          "minimum": 0,
          "maximum": 5
        },
        "col": {
          "type": "integer",
          "minimum": 0,
          "maximum": 5
        }
      },
      "required": [
        "type",
        "row",
        "col"
      ]
    },
    {
      "type": "object",
      "properties": {
        "type": {
          "const": "pass"
        }
      },
      "required": [
        "type"
      ]
    }
  ]
}

Start a game

curl -s "https://gameboard.gg/api/games/flip-grid/init?seed=7"

Then POST { state, action } to https://gameboard.gg/api/games/flip-grid/action, carrying state forward each call. See the API overview for the full loop.