Chalking

Develop your Darts Scoring mental arithmetic, improve your accuracy, increase your speed using the Chalking App.
Based on scoring characteristics of the game of darts, the app simulates successive rounds of darts.
Each round you will see three numbers; alongside each number will be either Single, Double, or Treble, representing the scores of three darts. The round score is the total of the three darts, remembering to multiply by two for Doubles and three for Trebles. You subtract the round-score from the game-score, and the cycle repeats.
You may play the game against the clock, or practice with no time pressure.