Gaming & Probability

Slide tiles together to reach the elusive 2048 tile.

Roll any tabletop dice expression — 4d6kh3, 2d20+5, 1d100, exploding dice.

Sink the randomly-placed fleet on a 10×10 grid.

Basic-strategy lookup chart for blackjack (S17, no surrender).

Check whether a word can be formed on a Boggle board via King-style adjacency.

Score a ten-pin bowling game from standard X / - roll notation.

Probability of drawing N of M target cards from a deck of any size.

Two-dice roll probabilities (2–12) for Catan resource production.

Compute expected score and rating change after a chess game.

Render a chess board from a FEN string.

How many clicks per second can you sustain over 5 or 10 seconds?

Connect Four against a heuristic computer player.

Score a 4-card cribbage hand plus starter card.

Find every word in a list that matches a positional pattern with ? wildcards.

Roll six 4d6-keep-highest-3 ability scores with running modifiers.

Find a valid double-out checkout combination for any remaining darts score.

Simulate single or 10× pulls with a configurable rate, soft pity and hard pity.

Estimate a handicap index from round scores, course ratings and slopes.

Guess the word one letter at a time across 5 categories.

Compute the optimal bankroll fraction to stake from win odds and probability.

Click cells to toggle their cross of lights. Turn them all off.

Weighted random picker for loot tables, names or any custom list.

Odds of winning a 'pick N of M' lottery, with optional bonus ball.

Crack the secret colour code in 10 guesses or fewer.

Generate printable mazes with a guaranteed solution path.

Find every matching pair in a grid of face-down cards.

Classic Minesweeper with selectable beginner/intermediate boards.

Simulate the Monty Hall problem and compare stay vs switch win rates.

Hypergeometric probability of drawing N+ lands in a Magic: the Gathering opening hand.

Play Othello (Reversi) against a greedy computer.

Monte-Carlo hand-vs-hand equity for Texas Hold'em pre-flop matchups.

Find the best 5-card poker hand from 5–7 cards.

Calculate the damage multiplier for an attacking type vs one or two defending types.

Build encounter tables by terrain and roll weighted random encounters.

D&D-style NPCs with name, race, profession, quirk and secret.

One-line random quest seeds for tabletop RPGs and improv writing.

Wait for the box to turn green, then click as fast as you can.

Monte-Carlo probability of an attacker beating a defender in classic Risk.

Payouts, true odds and house edge for European and American roulette.

Compute the standard Scrabble tile score for any word (+ bingo bonus).

Three-reel slot machine with weighted symbols and fake credits.

The classic Snake game — eat dots, grow longer, don't hit the wall or yourself.

Generate Sudoku puzzles at four difficulties — and solve any puzzle you paste in.

Play Tic-Tac-Toe against an easy or unbeatable computer.

Single- or double-elimination bracket structure from any list of players.

Show the optimal Tower-of-Hanoi move sequence for N disks.

Type the passage as fast and accurately as you can — measures WPM.

Unscramble the letters to find the word.

Build printable word-search puzzles from any list of words.

Guess the daily 5-letter word in six tries.

Pick the best dice to keep / reroll based on your current Yahtzee hand.

Score five dice in every Yahtzee category at once.