Workshop › 2048 › Step 18 of 26

Is there a move left?

What we are doing

The game is not over when the board is full: a full board can still have merges. It is over when there is no empty cell and no two equal tiles side by side or one above the other.

```js
// Any empty cell, or two equal neighbours (checking right and below covers every pair once).
function canMove() {
  for (let row = 0; row < SIZE; row++) {
    for (let col = 0; col < SIZE; col++) {
      const value = board[row][col]
      if (value === 0) return true
      if (col < SIZE - 1 && value === board[row][col + 1]) return true
      if (row < SIZE - 1 && value === board[row + 1][col]) return true
    }
  }
  return false
}
```

What it means

The first empty cell or equal pair found ends the search with return true.
col < SIZE - 1 makes sure there is a right neighbour before looking at it (the last column has none); the same for the row below.
If the loops finish without finding anything, the player is stuck: false.

Your turn

Write the comment and canMove above the comment // Every direction is ..., with an empty line after it.

Skills: Loops

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