• The crosssword is masked by a color scheme that indicates possible letters for each spot.
• Spell valid words to reveal correct letters (R) and incorrect letters (W) for each spot.
• Complete the game to reveal a classic black and white crossword puzzle.

• Tap a tile to give it focus and reveal letter options.
• Incorrect letters are cleared on receiving focus.
• Tap "Enter", or re-tap focused tile, or use shuffle to switch navigation direction (vertical or horizontal).
• Use keyboard arrow keys to move from word to word.
• Use arrow_back_iosand arrow_forward_ios to move from word to word.

Scoring

• Performance is assessed by efficiency in decoding the crossword.
• The fewer letters used, the greater the efficiency.
• Acheive an efficiency of at least 75% to earn a distinction.
• Acheive a distinction within 5 minutes to earn a masterclass.