glossaryruleslearn
Backgammon's vocabulary is small, old, and precise. This glossary defines the terms you will actually hear at a board, grouped the way the game is played: the board itself, the race, contact, the doubling cube, and match play. We kept each entry to one or two sentences, plain enough to use tonight.
A note before you start. These words are not jargon, they are compact stories, most of them centuries old. The game will teach them to you faster than any page can, so use this as a reference for the first few evenings, then forget it.
What are the parts of a backgammon board called?
Start with the geography. Twenty four narrow triangles, a raised spine down the middle, six points of home on each side. Everything else in the game is described relative to these.
- Checker: one of the fifteen pieces each player moves around the board. Players also say stone, man, or piece; they all mean the same thing.
- Point: one of the twenty four triangles. Two or more of your checkers on a point make it yours, and your opponent cannot land there.
- Bar: the raised strip dividing the board in half. A checker that gets hit waits on the bar, and its owner can move nothing else until it re-enters in the opponent's home board.
- Home board: the six points where your checkers complete their journey. All fifteen must arrive before the final phase can begin.
- Bear off: to remove a checker from the board once your whole army is home. The first player to bear off all fifteen wins the game.
What is a pip in backgammon, and what counts as a race?
Underneath the checkers, backgammon is a footrace measured in numbers. These are the words for the measuring.
- Pip: one unit of distance, a single step from one point to the next. Your pip count is the total distance all fifteen checkers still have to travel; the lower count is winning the race.
- Race: a position with no contact left, where neither player can be hit. In a pure race only the pip count and the dice matter, which is why serious players count.
- Crossover: moving a checker out of one quadrant of the board and into the next. Counting crossovers is the fast way to see how many rolls of work remain before you can bear off.
What do contact terms like blot, anchor and prime mean?
Contact is where backgammon stops being a race and becomes a fight. Most of the game's famous vocabulary lives here.
- Blot: a single checker alone on a point. Any opposing checker that lands on it sends it to the bar, and its whole journey starts over.
- Hit: to land on an opponent's blot. One hit can swing a game further than any other single event on the board.
- Anchor: a point you own inside your opponent's home board. It gives your rear checkers a safe base, and it keeps your chances alive when the rest of the game goes wrong.
- Prime: several consecutive points all owned by one player, a wall. A full six point prime cannot be passed by any checker trapped behind it.
- Blitz: an all-out attack on the opponent's home board, hitting blots and making points while their checkers sit on the bar. A blitz ends quickly, one way or the other.
- Back game: a defense built on two or more anchors deep in the opponent's home board, waiting for one late shot. Famous, dramatic, and harder to win than it looks.
- Holding game: keeping one strong anchor on a key point and waiting for the opponent to run past it. You hold the door; they have to come through.
A blot is not a word you learn. It is a word that happens to you.
How does the doubling cube work, and what is a take point?
The cube arrived in the 1920s and remade a game already thousands of years old. It turns every position into two questions: who is winning, and by how much.
- Cube: the doubling cube, marked 2, 4, 8, 16, 32 and 64. It is never rolled; offering it asks your opponent to play on for double the value or concede the game as it stands.
- Take and drop: the two legal answers to a double. Take means play on at the new value; drop means concede the game at the old one.
- Take point: the minimum winning chance you need to correctly accept a double. The textbook starting figure is 25 percent, before gammons and cube ownership bend it.
- Beaver: a house rule, not a tournament one. A player who is doubled may instantly redouble while keeping the cube, turning a 2 into a 4 on the spot.
What do gammon, backgammon and the Crawford rule mean?
Some words only earn their keep when you play for points. These decide how much a win is worth, and when the cube sleeps.
- Gammon: a win completed before your opponent has borne off a single checker. It counts double.
- Backgammon: a win while your opponent still has a checker on the bar or inside your home board, with none borne off. It is the game's own name for its harshest result, and it counts triple.
- Match play: playing to a fixed number of points rather than game by game. The score changes what the cube and the gammon are worth, which changes correct play.
- Crawford rule: in match play, the first game after a player reaches match point is played without the doubling cube. One game of shelter, then the cube returns.
That is the working set. There are deeper drawers, duplication, diversification, the Jacoby rule, but these entries carry nearly all of the talk at a real table, and each one will make sense on the day a position demands it.
One last term, ours: provably fair. In Orion the dice are committed before a game and revealed after it, and anyone can recheck a finished game in the browser at orion.arthea.ai/verify, no account needed.