Turf War

Two players fight over the twenty numbers on the board. A coin toss decides who throws first.

An open number: hit it and it's yours. A single or a double claims it plain. A treble claims it fortified.

Your opponent's plain number: a single knocks it to contested, and a second hit takes it. A double or treble takes it in one dart.

Your opponent's fortified number: every hit counts as one, whatever the ring, so it takes three darts to break. Once it's been hit it shows as cracked until it falls.

Your own number: any hit repairs it, and enough hits fortify it.

The bull: once per leg, each player's bull is a reset. The outer bull wipes all your opponent's numbers back to open. The inner bull wipes the whole board, yours included. After that, your bull does nothing until the next leg. In Bounty, it's once per game.

Misses do nothing. A dart that lands on a number you weren't aiming at still counts, so a miss can take a neighbour.

Domination: end a visit holding 11 of the 20 numbers and you're holding the board. Your opponent then gets one visit to take you below 11. If they can't, you win the leg. The first visit of each leg is a single dart, so throwing first isn't a head start. Best of 3, and the throw alternates each leg.

Bounty: 10 visits of three darts each. At the end of each of your visits you bank 1 point for every number you hold, 2 for each fortified one. Highest total wins.

Reading the board: the numbers run in board order, so neighbours sit side by side. Each number shows its owner's colour, and the marks underneath show how much defence it has left: two for plain, one for contested, three for fortified. A fortified number has a gold outline, dashed once it's cracked.