Hammer: The Golf Game Where Every Hole Can Double
Hammer is the golf game that borrows the doubling cube from backgammon. Every hole starts as a small bet. At any point, either side can hammer — double the stake — and the other side has to decide on the spot: accept the new price, or concede the hole at the old one. That's the entire rulebook. It is also the reason Hammer can turn a one-dollar hole into a sixteen-dollar hole before anyone has putted.
The basic rules of Hammer
Hammer is usually played one-on-one or two-on-two, match play style, with each hole scored separately. Lowest score on the hole wins it. Ties push. Nothing carries over.
- Base unit. Every hole starts at one unit — a dollar, five dollars, whatever the group sets. Pick it deliberately, because this number gets multiplied.
- The hammer. At any time during a hole, the side holding the hammer can call "hammer." The bet on that hole doubles.
- Accept or fold. The other side either accepts — the hole is now worth two units — or declines and concedes the hole at the current value, one unit.
- The hammer changes hands. Once a hammer is accepted, only the side that accepted it can hammer next. That's the rule that makes the game strategic rather than a shouting match.
- It keeps doubling. Two, four, eight, sixteen. Each hammer is a new decision for the other side: accept and take the hammer back, or fold and pay the price on the table.
A quick hole. You both find the fairway. Your opponent hits it to twelve feet and calls hammer. You're in a bunker, so you fold and pay one unit. Next hole. You stripe a drive, they pull one into the trees, and now you call hammer. They accept — two units — and blast a miracle punch onto the green. They hold the hammer now. They hammer back to four. You accept, because you've got a wedge in your hand. You make par, they make bogey. Four units to you.
Who holds the hammer at the start of a hole?
This is the setting most groups forget to declare, and it matters more than the base unit. Three common conventions:
- Loser holds it. Whoever lost the previous hole starts the next one with the hammer. It's the most popular version because it keeps the trailing side dangerous and stops one hot player from steamrolling the round.
- Either side can open. Nobody holds it at the start; the first side to call hammer takes the opening double, and it alternates from there. Faster and more chaotic.
- Honors hold it. The side with the tee starts with the hammer. Rewards the previous hole's winner, which makes runs longer and swingier.
Pick one on the first tee. If you play "loser holds it," decide what happens after a tied hole — most groups leave the hammer where it was.
Timing: when can you hammer?
A hammer can be called at any point in the hole, but it has to be called before the next shot is struck. You can't hammer while your opponent's ball is in the air, and you can't hammer after the hole is decided. The clean version: the hammer is live from the moment the previous shot comes to rest until the next player starts their swing.
Some groups ban hammering before the tee shots are hit — "no hammer on the tee" — so the opening double reflects something that actually happened. Others allow it and treat a first-tee hammer as pure intimidation. Either works, but say which one you're playing.
Accept or fold: the decision that decides the round
Every hammer is a small math problem. Folding costs you the current stake for certain. Accepting risks double the current stake but keeps you alive — and hands you the hammer, which is worth something on its own.
The rough rule: accept if you'd win the hole from here more than a third of the time. If your opponent is twelve feet away for birdie and you're in the water, that's not a third, and you fold. If they're twelve feet away and you're twenty feet away, it's close to a coin flip, and folding is giving money away.
Where beginners go wrong is folding out of fear rather than math. A player who folds every hammer loses a unit on almost every hole and never gets a chance to win the big ones. A player who accepts everything gets crushed on the holes where they're genuinely dead. The good Hammer players are the ones who can look at a lie and honestly price their chances.
Strategy: swinging the hammer
- Hammer after their mistake, not after your good shot. A great shot of yours can be matched. A ball in the hazard can't be un-hazarded. The highest-value hammer is the one you call the second their ball disappears into trouble.
- Hammer the short par 3. If you're on the green and they're off it, the odds swing hard and there's not much hole left for variance to save them.
- Don't hammer with the putter unless you're sure. A hammer on the green hands them the hammer for a low-variance situation. If they accept and drain it, you've doubled the bet and lost the initiative.
- Holding the hammer is an asset. Sometimes the right play is to accept a hammer you'd rather not, because it gives you the only weapon in the hole. Use it when your opponent is about to hit the shot they're worst at.
- Watch the running total. A player who is way down will accept everything, because the only way back is a doubled hole. Hammer them when they're dead, not when they're merely behind.
The caps that keep it a golf game
Uncapped Hammer is a bad idea in almost every group. A base of five dollars becomes eighty after four doubles, and the fourth double usually gets called by someone who is annoyed rather than someone who has an edge. Standard protections, all first-tee declarations:
- Cap the doubles. Three hammers per hole is the common ceiling — eight times the base unit at most. Two is fine in a group that's new to it.
- Cap the round. Agree on a number nobody can lose more than for the day. It turns the last few holes into a real game instead of a stubbornness contest.
- Play it net. Hammer between a 4 and a 16 is a mugging without strokes. Apply handicap strokes where they fall on the card — here's how that works — and the accept-or-fold decisions get honest.
- Ties push. Don't let a hammered hole carry over. A carried, hammered hole is how a round ends in a fistfight.
Hammer for foursomes
Two-on-two Hammer is played as a better-ball match, and partners hammer as a team — one voice, one decision. It plays faster than the singles version because there's usually one player in position, and it's the format most groups use on a regular Saturday. Rotate partners every six holes, Sixes-style, if you want to keep any one pairing from carrying the hammer all day.
Why Hammer works
Most golf bets settle on the scorecard after the fact. Hammer puts a decision in the middle of the hole — right when someone is standing over a tough shot, someone else gets to ask "how sure are you?" That's the same instinct Flip It is built around: giving players a way to raise the stakes on one specific shot, at the moment it matters, instead of waiting eighteen holes to find out who won. Hammer doubles the money; Flip It hands the shot back. Both make the boring shots matter.
The bookkeeping
Hammer's bookkeeping is easy on any one hole and miserable across eighteen: a per-hole stake that changes mid-hole, who won, who held the hammer, whether a fold happened at two or four. Nobody remembers by the turn. Write the hole's final value down as you walk off the green, or track it in an app, and settle the total before the parking lot.