Workshop › Chess › Step 19 of 48

Say whose turn it is

What we are doing

Write whose turn it is centered above the board, in the space TOP left free.

```js
  const message = turn === 'w' ? 'White to move' : 'Black to move'
  ctx.fillStyle = 'white'
  ctx.font = 'bold 17px sans-serif'
  ctx.textAlign = 'center'
  ctx.textBaseline = 'alphabetic'
  ctx.fillText(message, canvas.width / 2, 34)
```

What it means

• The message depends on turn.
• canvas.width / 2 with textAlign = 'center' centers it; y = 34 is in the top margin.
• textBaseline = 'alphabetic' puts text back on the normal line (the pieces set it to 'middle').

Your turn

At the end of draw (under the dot loop, before the last }), leave an empty line and write the message lines.

Skills: Drawing on a canvas

← Click a dot to move The rook slides →

All steps

1. A dark table
2. One row of squares
3. All 64 squares
4. The starting position as text
5. Color and kind
6. Draw the pieces
7. An outline for white
8. Draw again and again
9. The knight's jumps as data
10. A list of moves
11. The king steps too
12. Which square was clicked?
13. Light up the selected square
14. Whose turn is it?
15. Where can it go?
16. Show the targets
17. Play a move
18. Click a dot to move
19. Say whose turn it is
20. The rook slides
21. Bishops and queens
22. Pawns step forward
23. Pawns capture diagonally
24. A pawn becomes a queen
25. Is a square attacked?
26. Attacks from far away
27. Is the king in check?
28. A move that remembers
29. Take a move back
30. Only legal moves
31. Castling moves
32. The rook jumps over
33. Losing the right to castle
34. No castling through check
35. Remember the double step
36. En passant
37. Checkmate and stalemate
38. Check! and the result
39. Click to play again
40. Show the last move
41. A score for a position
42. Thinking ahead
43. Pick the best move
44. Alpha-beta: skip what cannot matter
45. Try the best-looking moves first
46. The computer plays black
47. You are white
48. Build it yourself: the fifty-move rule