Pick any two boxers from a roster of three hundred — champions, contenders and the legends of the last century — set the distance, and let real 2026 ratings fight it out round by round, on three scorecards, with a knockout that can land at any second.
Full Camp: Eight to twelve weeks, sparring partners picked for this opponent, a game plan drilled.
Late Replacement: Stepped in on short notice. No opponent-specific sparring and a half-built engine; it shows in the championship rounds.
Made Weight: On the limit with something to spare and a healthy rehydration overnight. Chin and legs intact.
Weight-Drained: Boiled down to the limit or fighting under a rehydration clause. A drained man's chin goes first and his legs go with it; he is stopped more often.
Active: Two or three fights a year. Timing, distance and the jab are all sharp.
Ring Rust: A year or more out - a layoff, a suspension, a retirement undone. Timing and accuracy go before the legs do; power and chin travel.
Neutral: Las Vegas, Riyadh, a neutral arena. Nobody's judges.
Hometown: Fighting at home, in front of his own crowd - and his own scorecards. A small lift in the ring, a bigger one on a close decision: the visitor has to win it clearly.
Full Camp: Eight to twelve weeks, sparring partners picked for this opponent, a game plan drilled.
Late Replacement: Stepped in on short notice. No opponent-specific sparring and a half-built engine; it shows in the championship rounds.
Made Weight: On the limit with something to spare and a healthy rehydration overnight. Chin and legs intact.
Weight-Drained: Boiled down to the limit or fighting under a rehydration clause. A drained man's chin goes first and his legs go with it; he is stopped more often.
Active: Two or three fights a year. Timing, distance and the jab are all sharp.
Ring Rust: A year or more out - a layoff, a suspension, a retirement undone. Timing and accuracy go before the legs do; power and chin travel.
Neutral: Las Vegas, Riyadh, a neutral arena. Nobody's judges.
Hometown: Fighting at home, in front of his own crowd - and his own scorecards. A small lift in the ring, a bigger one on a close decision: the visitor has to win it clearly.
Lead story
Twelve rounds, ten-point must, and a knockout that can land at any second. The Boxing Sim runs the bout instead of comparing two numbers.
Pick any two of 300+ professional boxers — champions, contenders, prospects and the legends of the last century — set the distance at four, six, eight, ten or twelve rounds, and let the engine fight it out. Every boxer carries twelve ratings taken from how they actually fight: power, hand speed, accuracy, work rate, the jab, body work, defense, footwork, inside fighting, chin, stamina and ring IQ. The simulator does not average them into one score. Power is checked against the other man's chin and defense; work rate is paid for out of stamina in the late rounds; a southpaw earns his awkwardness against an orthodox opponent who rarely sees one.
The result is a fight you can read like a report from the press row: the round it ended, whether it was a clean knockout, a stoppage on cuts or a corner retirement, or three scorecards that went to a unanimous, split or majority decision — and, sometimes, a draw. Run the same bout a hundred times and the numbers tell you how much of the pick was skill and how much was the puncher's chance.
Use it as a fight predictor for this weekend's card, a dream-fight machine for the arguments that never got settled — Robinson at 160 against the modern middleweights, Tyson against the giants of today — or a straight custom matchup tool: any two boxers, any weight class, a 20-foot ring or a small one, full camp or a late replacement.
Ratings are grouped into what wins fights rather than summed: skill (jab, accuracy, ring IQ), pressure (work rate, body work, inside game), defense (guard, footwork, chin) and engine (stamina, speed). Each round is scored from those matchups with the noise a real round has, so an 8-4 favourite still loses one bout in three and a 40-0 record can end on one right hand.
Cross-division dream fights are priced by the pound: every ten pounds of weight limit the smaller man gives away costs him a little on the cards and more against a puncher. It is why a great flyweight is a fair fight against a great bantamweight and a mismatch against a great heavyweight — the engine says so in the odds before the first bell.
Every rating on the site is our own model built from records, opposition, knockout ratios and how each boxer actually fights, updated for 2026. They are not official statistics and the simulations are not betting advice. We are an independent fan project with no connection to any sanctioning body, promoter or broadcaster — a fight page, not a sportsbook.
This is a boxing sim rather than a fighting game: nothing to download, no account, no controller. Press simulate and the bout plays out as a live boxing game on the page, one round at a time, with the knockdowns, the cuts and the scorecards as they happen, then the verdict and the reasons. It runs in any browser, on a phone, a Chromebook or a work PC, which is why it doubles as a free boxing game online for a lunch break. Want more than one fight? The career mode makes you the fighter and Boxing Manager puts you behind the desk; the whole shelf, with pages for unblocked, mobile and PC play, is under free boxing games.