Game Helpers Tools
Trackers, pairings, generators and probability for the games you play away from the screen.
How many Swiss rounds a field needs, how long it will take, and — the number that actually matters — how many players will be tied on the cut line.
Win Rate & Confidence Interval CalculatorWinning 7 of 10 is not a 70% win rate. See the range your record actually supports, using the Wilson interval rather than the one that breaks at the edges.
Initiative & Combat TrackerTurn order, hit points and condition durations that survive combatants joining and dying mid-fight. Nothing is stored anywhere but this browser.
Loot & Random Table BuilderTurn weighted entries into die ranges that use every face exactly once — no gaps, no overlaps. Nested tables, no-repeat draws, printable.
Board Game Score Pad & Turn TimerScores across rounds for any game, with ties ranked the way a tournament ranks them, plus a per-player turn timer. Nothing leaves the browser.
Swiss Tournament PairingPairs each round by backtracking search, so nobody meets twice while a rematch-free pairing exists — and it says so plainly when one does not.
RPG Character & NPC GeneratorNames, trades, quirks, wants and secrets — plus ability scores from a curve computed exactly rather than guessed at. No game system assumed.
Go Liberties & Capture TrainerLiberties, capture, suicide and ko on a real board. Groups with one liberty are ringed, so you can see atari rather than being told about it.
Games Night LeaderboardScore a games night across games that do not share a scale. Three ways to combine them, side by side, and a warning when they pick different winners.
Juggling Siteswap CheckerCheck any juggling siteswap and see why it works or does not. The collision test worked out beat by beat, plus every valid pattern of a given length.
Dice Probability CalculatorType any dice notation and see the exact odds of every total — worked out, not sampled. Handles advantage, keep-highest and modifiers.
Elo Rating CalculatorWork out what a game or a whole event does to your rating, with the right K-factor applied and a performance rating that is not the crude one.
Word Game HelperFind every word your tiles can play, sorted by score, with blanks handled properly — plus a scorer for checking a finished board.
Sudoku Solver & GeneratorGenerate new Sudoku puzzles at several difficulties or solve any puzzle instantly, with an explanation of how the solving actually works.
About these game helpers tools
Almost everything in this category exists because games produce small samples and people read them as certainties. Winning seven of ten is not a seventy per cent win rate; it is a record consistent with anything from about forty to ninety, and the honest interval is wide enough that most players would rather not see it. The same gap turns up everywhere here. An Elo change after one event tells you far less than the number of decimal places suggests, because the rating is an estimate being nudged rather than a measurement being taken. A run of bad dice feels like a broken die and is almost never one, since the chance of some unlikely-looking streak appearing somewhere in an evening is high even when every roll is fair. Tournament pairings have the opposite problem: they look like bookkeeping and are actually a constraint-satisfaction puzzle, which is why a naive pairing strips out rematches until the last round and then discovers it has painted itself into a corner. The tools here try to be specific about which kind of number they are handing you. Where something is exact — the odds of drawing a card, the ranges in a die table, the pairing that provably avoids a rematch — it is computed rather than sampled, and says so. Where something is an estimate, it comes with the range around it rather than a single confident figure. That distinction is the whole reason these are separate from the games themselves: a game is played, but a helper is trusted, and being trusted is a higher standard.