All puzzle solvers
Cube solvers, sudoku and grid puzzles, game positions and number puzzles. Free, no sign-up, nothing leaves your browser.
Cube solvers and timer
Solvers
3x3 cube solverPaint your colors, follow the animated moves2x2 cube solverShortest solution for any pocket cube position4x4 cube solverCenters, edges and parity, solved in stagesSkewb solverOptimal skewb solutions, eleven moves at mostPyraminx solverFewest moves for any pyraminx, tips listed apartSquare-1 solverAny shape back to a solved cube
Learn
How to solve a Rubik's cubeSeven stages, seven algorithms, animated examplesCube notationEvery move letter shown on an animated cubeHow to solve a 2x2Three stages, three algorithms, your own walkthroughHow to solve a 4x4Centers, edge pairing, 3x3 stage and parity fixesHow to solve a 5x53x3 centers, three-piece edges, one parity fixRubik's cube patternsSixteen patterns to make from a solved cubeRubik's cube algorithmsNotation, beginner set, 4-look last layer, famous onesCFOP methodCross, F2L, OLL, PLL with a played example solveF2L algorithmsEvery corner and edge pair case for one slotOLL algorithms57 cases and 2-look OLL with top-view diagramsPLL algorithmsAll 21 last-layer swaps with arrows and practiceRoux methodTwo blocks, corners, then the middle sliceZZ methodOrient every edge first, then turn only R, U, L
Sudoku and grid puzzles
Sudoku family
Sudoku solverType your grid, get every step explainedKiller sudoku solverDraw the cages, enter the sums, solveSudoku X solverDiagonal sudoku with both diagonals checkedJigsaw sudoku solverPaint irregular regions, then solve with hintsSamurai sudoku solverFive overlapping grids solved together16x16 sudoku solverGiant hexadecimal sudoku with 1 to 9 and A to GHow to solve sudokuRules, pencil marks and first techniques, with live gridsSudoku techniquesAll 40 strategies with real example gridsX-wing sudokuRows and columns versions, real solver examples
Other grid puzzles
Kakuro solverSum clues in, digits out, with combinationsNonogram solverPicross and griddlers, solved line by lineFutoshiki solverGreater-than puzzles from 3x3 to 9x9Calcudoku solverMath cage puzzles, 3x3 up to 9x9Logic grid solverWho owns what: clues in, grid and reasoning outSlitherlink solverFind the one loop around the numbersStar battle solverPaint the regions, see where the stars goBinairo solverTakuzu and binary puzzles with 0s and 1sKakuro combinationsEvery sum, every run length, filter by digitFlow Free solverNumberlink paths, every pair connectedSkyscraper solverClues around the grid, heights insideHidato solverNumber path puzzles with diagonal stepsNurikabe solverIslands and one connected black wallHashi solverBridges puzzles, single and double linesPentomino solverTile any shape with the 12 pentominoes
Game solvers
Play
Minesweeper onlineClassic game with a hint and no-guess boardsConnect 4 onlinePlay the computer at four levels, or a friend2048 with AIPlay 2048, watch the AI, or solve your boardPeg solitairePlay English, European or triangle boards, then solveNine men's morrisThe mill game against the computer or a friend
Puzzles to play
Star battlePlace the stars, new grids every dayNonograms onlineFill squares from number clues, reveal a pictureFutoshikiLatin square with greater-than signsKakuro onlineCross-sum grid, a new one every dayCalcudokuMath cages with +, −, × and ÷Skyscrapers puzzleCount the towers you can seeBridges puzzleConnect the islands with bridgesBinairo (takuzu)Balance 0s and 1s, never three in a rowSlitherlinkDraw one loop around the number cluesHidatoNumber path where each step touches the nextSudoku onlineClassic 9x9 grids with explained hintsKiller sudoku onlineCage sums instead of clues, a new grid dailyNurikabeIslands and one connected wallNumberlink (flow)Connect the pairs, fill every squareSudoku XBoth diagonals hold 1 to 9 tooJigsaw sudokuIrregular regions replace the 3x3 boxesLight up puzzlePlace lamps until every square is litHeyawakeShade rooms without blocking the waySamurai sudokuFive overlapping grids in one big puzzle16x16 sudokuBig grid with 1 to 9 and A to G
Solve a position
Chess move calculatorStockfish best move, top lines and mate finderChess analysis boardReview a whole game: graph, grades, best movesConnect 4 solverExact score for every column, win, draw or lossMinesweeper solverSafe cells, certain mines and the oddsMastermind solverEvery code left and the smartest next guessCheckers solverBest move and forced wins in American checkersTic tac toe solverEvery square marked win, draw or lossBlock puzzle solverBest order and spot for your three pieces
Number and logic puzzles
24 game solverEvery way to make 24 from four cardsCountdown numbers gameSix numbers, one target, the shortest workingMagic square solverComplete, check or generate any magic square15 puzzle solverShortest solution for any sliding tile boardLights Out solverFewest presses to switch every light offCipher solverCrack substitution, Caesar, Vigenère and Atbash codesTower of Hanoi solverFewest moves from any disk positionCaesar cipher decoderDecode any shift, or let it find the shift for youCryptogram solverCrack letter-swap puzzles and cryptoquotes, then fix any letterCryptarithm solverAlphametics like SEND + MORE = MONEY, all solutions