西洋雙陸棋

Backgammon is one of the oldest known board games, combining strategy and luck through dice. Two players move their 15 checkers around a board of 24 triangular points according to dice rolls, racing to be the first to bear off all pieces.

Move all 15 of your checkers around the board and bear them off before your opponent does the same.

Each player starts with 15 checkers in a specific arrangement: 2 on the 24-point, 5 on the 13-point, 3 on the 8-point, and 5 on the 6-point. Players sit on opposite sides and move in opposite directions around the board.

1. Roll two dice at the start of each turn. Each die can be used to move one checker.
2. Checkers always move forward toward your home board (the inner quadrant).
3. You may move one checker for each die, or use both dice for one checker if the intermediate point is open.
4. Doubles are special: you play the number four times instead of twice.
5. You cannot land on a point with two or more enemy checkers (it's blocked).
6. Landing on a point with exactly one enemy checker 'hits' it, sending it to the bar (center).
7. Checkers on the bar must re-enter in your opponent's home board before other moves.
8. Once all your checkers are in your home board, you may begin bearing off (removing them from the board).
9. When bearing off, you can remove a checker from the point matching the die roll, or move a checker from a higher point.

The first player to bear off all 15 checkers wins. A 'gammon' (double win) occurs if the opponent hasn't borne off any checkers. A 'backgammon' (triple win) occurs if the opponent still has checkers on the bar or in your home board.

• *Make points (two or more checkers) to block your opponent's movement.
• *Building a 'prime' (six consecutive blocked points) traps enemy checkers behind it.
• *Balance between aggressive blitzing (hitting) and building strong defensive positions.
• *Don't leave too many blots (single checkers) exposed to being hit.
• *The doubling cube adds a strategic layer - know when to double and when to accept/decline.
• *Getting your back checkers (runners) moving early prevents being trapped.
• *In bearing off, avoid leaving gaps that waste pips.

Backgammon's ancestors date back 5,000 years to Mesopotamia. The modern game developed in the 1920s-1970s, with the doubling cube adding a gambling/strategic element.