The objective of golf is simple to state and punishing to execute: move the ball from the tee into the hole in the fewest strokes, then repeat across eighteen holes. Each hole has a par of 3, 4 or 5, reflecting the strokes an expert should need, and a player's score is measured against that par. The two fundamental formats are stroke play, where every stroke across a round counts toward a total, and match play, where players compete hole by hole and the contest is decided by holes won rather than strokes.
A round proceeds hole by hole in a fixed order. Players tee off from the teeing ground, advance the ball down the fairway toward the putting green, and finish by rolling it into a 4.25-inch hole marked by a flagstick. The core principle is to play the ball as it lies and the course as you find it, altering neither. Penalty strokes are added for trouble such as water, out of bounds and unplayable lies, and the player or side with the lowest total, or the most holes, is the winner.
Scoring at a glance
Core rules
The teeing ground and order of play
Each hole begins from the teeing ground, a rectangle two club-lengths deep between the tee markers, and the ball may be raised on a tee peg. Only here may a player improve the lie. Order of play matters: on the first tee the honour is decided by draw or ranking, thereafter the player with the lowest score on the previous hole tees off first. Through the green, the ball farthest from the hole, called away, is played first. In casual golf, ready golf is now encouraged to speed up play.
Play the ball as it lies
The defining rule of golf is that you play the ball as it lies and the course as you find it. A player may not improve the lie of the ball, the area of the intended stance or swing, or the line of play by pressing down grass, breaking branches or moving fixed objects. Loose impediments such as leaves and stones may be removed, and movable obstructions relocated, but if the ball moves as a result away from the green there is usually a penalty. This principle underpins the game's integrity.
The scorecard and par
In stroke play a player records the gross number of strokes taken on every hole, and the totals decide the event. Scores are named relative to par: one under par is a birdie, two under an eagle, and three under an albatross; one over is a bogey, two over a double bogey. A hole in one on a par 3 is an ace. Each player is responsible for the accuracy of the score entered for each hole; signing for a score lower than actually taken means disqualification.
Match play
In match play the unit of competition is the hole, not the total strokes. A hole is won by the player or side that holes out in fewer strokes; if both take the same number the hole is halved. The match is described by the margin, for example 3 and 2, meaning a player leads by three holes with only two left to play, so the match ends early. Players may concede a putt, a hole or the entire match at any time, a courtesy unique to this format.
The putting green
On the putting green a player may mark the ball's position, then lift and clean it before replacing it. Damage such as spike marks, old hole plugs and ball marks may be repaired. Since the 2019 rules overhaul the flagstick may be left in the hole while putting with no penalty for striking it, which speeds play. A ball overhanging the lip is given a reasonable time, roughly ten seconds after reaching the hole, to see whether it will fall before it must be holed out.
Bunkers
A bunker is a hazard of prepared sand, and special restrictions apply. Before making a stroke a player may not touch the sand with the hand or club to test its condition, nor ground the club immediately behind or in front of the ball, on penalty of two strokes or loss of hole. Loose impediments may now be removed under the modern rules. Since 2019 a player may also declare a ball unplayable in a bunker and drop outside it, on the far side of the ball from the hole, for a two-stroke penalty.
The fourteen-club rule
A player may carry no more than fourteen clubs during a stipulated round, a limit set in 1938 to end the era of golfers hauling two dozen clubs. The clubs and the ball must conform to the equipment standards published by the R&A and USGA, covering dimensions, groove design and ball performance. A caddie may carry the bag, offer advice and help read greens before the stroke, but only the player may make the stroke. Sharing clubs with a partner is generally not permitted in individual play.
Fouls & penalties
Out of bounds and lost ball
A ball hit beyond the course boundary, marked by white stakes, or one that cannot be found within a three-minute search is treated under stroke and distance: the player adds one penalty stroke and replays from the spot of the previous shot, effectively losing both the stroke and the yardage. A provisional ball may be played to save time if the original might be lost or out of bounds. This is golf's harshest common penalty, costing two shots relative to a good drive.
Penalty areas (water)
Penalty areas, formerly water hazards, are marked with yellow or red stakes. For one penalty stroke a player may play again from the previous spot, or drop on the line from the hole through the point the ball last crossed the margin, extended back as far as desired. Red penalty areas also allow lateral relief within two club-lengths of the crossing point, no nearer the hole. A player may also play the ball as it lies within the area without penalty if it is reachable.
Unplayable lie
A player may deem the ball unplayable anywhere except a penalty area, and is the sole judge of that decision. For one penalty stroke there are three relief options: replay from the previous spot, drop within two club-lengths no nearer the hole, or drop on the line straight back from the hole through the ball. The choice lets a player escape trouble such as a lie against a tree root or deep in a bush, trading a stroke for a clean swing.
Wrong ball and wrong place
Playing a ball that is not yours, a wrong ball, brings the general penalty, two strokes in stroke play or loss of hole in match play, and the mistake must be corrected by then playing the right ball. Similarly, playing from a wrong place, such as taking relief in the incorrect spot, is penalized. Marking your ball clearly with a personal identification mark is the standard defence against these errors, especially in thick rough where two identical balls may lie close together.
General penalty situations
The two-stroke or loss-of-hole penalty covers a range of breaches beyond the obvious ones: giving advice to or asking advice of anyone other than your caddie or partner, testing the condition of a hazard, carrying more than fourteen clubs, capped at four strokes per round, or hitting a moving ball. Pace-of-play policies at professional and elite amateur events can add strokes for repeated slow play. Most breaches carry the same fixed penalty, keeping the code consistent across situations.
Match format
A professional tournament is almost always 72 holes of stroke play over four days, one 18-hole round per day. After 36 holes a cut is applied, typically the top 65 and ties on the men's PGA Tour, and only those players continue for the weekend rounds. The winner is the player with the lowest four-round total. If two or more players tie, a playoff decides it, either sudden death, where the first hole won ends the contest, or an aggregate playoff over a set number of holes, as at the U.S. Open and the Open Championship in their modern formats.
Team and match-play events run very differently. The Ryder Cup and Presidents Cup pit two sides against each other across three days of foursomes, an alternate-shot format, four-balls, a better-ball format, and concluding singles, awarding a half-point for each halved match and the trophy to the side that first reaches the target total. Amateur and club golf leans on the handicap system, which subtracts a player's handicap index from the gross score to produce a net result, letting golfers of any standard compete fairly in both stroke-play and match-play formats.
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