The Chalker

You're not throwing. You're the chalker. Watch three darts land, work out the new score in your head, then enter it before the next visit starts. Get it right and play moves on. Get it wrong and the real answer is revealed, so you can see exactly where you went wide.

Every leg is double-out: a visit that would leave you on 1, take you below zero, or finish on anything except a double is a bust, and the score stays exactly where it was. Hit Bust instead of a number if you think that's what just happened.

After a leg-winning checkout, you'll also be asked how many darts it took to finish. A real chalker has to know that too.

Subtract: enter the new score left after each visit. On a bust, tap Bust or enter the score it stays on.

Add up: enter the total of the three darts. The scoreboard does the subtracting for you. You still have to spot a bust: tap Bust instead of a total, or it counts as a miss.

Each has its own leaderboard.

Solo Marker: one simulated player, one running score. The simplest way in.

Match Chalk: two players alternate visits and you keep both columns at once, exactly like a real chalker at a pub board.

The level slider picks from 20 real skill levels, grouped into five tiers from Beginner to Elite. Each level carries its own genuine average and checkout percentage. Higher levels throw more trebles and finish more often, so busts get rarer the further up you go.

Every session builds a ChalkScore: mostly your accuracy, with a bonus for speed and for playing on harder settings. Match Chalk and the less-assisted Chalk Help levels score higher than Solo Marker or Full Call at the same accuracy, since they're genuinely harder to get right.

You need at least 15 graded visits in a session before it counts, so a lucky run of three guesses can't fake a good score.

Boards are split by thrower tier, with All-Time and This Week tabs. Sign in to post your run and see where you land.