Gaming & Probability

Dice, cards, brackets and probability tools.

47 tools

2048 Slide tiles together to reach the elusive 2048 tile.
Advanced Dice Roller Roll any tabletop dice expression — 4d6kh3, 2d20+5, 1d100, exploding dice.
Battleship Sink the randomly-placed fleet on a 10×10 grid.
Blackjack Basic Strategy Chart Basic-strategy lookup chart for blackjack (S17, no surrender).
Boggle Word Validator Check whether a word can be formed on a Boggle board via King-style adjacency.
Card Draw Probability (Hypergeometric) Probability of drawing N of M target cards from a deck of any size.
Catan Resource Roll Probability Two-dice roll probabilities (2–12) for Catan resource production.
Chess Elo Calculator Compute expected score and rating change after a chess game.
Chess FEN Visualizer Render a chess board from a FEN string.
Click Speed Test How many clicks per second can you sustain over 5 or 10 seconds?
Connect Four Connect Four against a heuristic computer player.
Cribbage Hand Scorer Score a 4-card cribbage hand plus starter card.
Crossword Pattern Matcher Find every word in a list that matches a positional pattern with ? wildcards.
D&D Ability Score Roller Roll six 4d6-keep-highest-3 ability scores with running modifiers.
Gacha Pull Simulator Simulate single or 10× pulls with a configurable rate, soft pity and hard pity.
Hangman Guess the word one letter at a time across 5 categories.
Lights Out Click cells to toggle their cross of lights. Turn them all off.
Loot Table Roller Weighted random picker for loot tables, names or any custom list.
Lottery Odds Calculator Odds of winning a 'pick N of M' lottery, with optional bonus ball.
Mastermind Crack the secret colour code in 10 guesses or fewer.
Maze Generator Generate printable mazes with a guaranteed solution path.
Memory Match Find every matching pair in a grid of face-down cards.
Minesweeper Classic Minesweeper with selectable beginner/intermediate boards.
MTG Mulligan Probability Hypergeometric probability of drawing N+ lands in a Magic: the Gathering opening hand.
Othello / Reversi Play Othello (Reversi) against a greedy computer.
Poker Equity Calculator Monte-Carlo hand-vs-hand equity for Texas Hold'em pre-flop matchups.
Poker Hand Ranker Find the best 5-card poker hand from 5–7 cards.
Pokémon Type Effectiveness Calculate the damage multiplier for an attacking type vs one or two defending types.
Random Encounter Generator Build encounter tables by terrain and roll weighted random encounters.
Random NPC Generator D&D-style NPCs with name, race, profession, quirk and secret.
Random Quest Generator One-line random quest seeds for tabletop RPGs and improv writing.
Reaction Time Test Wait for the box to turn green, then click as fast as you can.
Risk Battle Probability Monte-Carlo probability of an attacker beating a defender in classic Risk.
Roulette Probability Reference Payouts, true odds and house edge for European and American roulette.
Scrabble Score Calculator Compute the standard Scrabble tile score for any word (+ bingo bonus).
Slot Machine Simulator Three-reel slot machine with weighted symbols and fake credits.
Snake The classic Snake game — eat dots, grow longer, don't hit the wall or yourself.
Sudoku Generator & Solver Generate Sudoku puzzles at four difficulties — and solve any puzzle you paste in.
Tic-Tac-Toe Play Tic-Tac-Toe against an easy or unbeatable computer.
Tournament Bracket Generator Single- or double-elimination bracket structure from any list of players.
Tower of Hanoi Solver Show the optimal Tower-of-Hanoi move sequence for N disks.
Typing Speed Test Type the passage as fast and accurately as you can — measures WPM.
Word Jumble Unscramble the letters to find the word.
Word Search Generator Build printable word-search puzzles from any list of words.
Wordle Guess the daily 5-letter word in six tries.
Yahtzee Reroll Suggester Pick the best dice to keep / reroll based on your current Yahtzee hand.
Yahtzee Score Calculator Score five dice in every Yahtzee category at once.