Logic & Deduction
Use clues and elimination to find hidden answers. Train systematic reasoning.
Crack the Code
Use logic clues to guess the secret 3-digit combination. Can you unlock the padlock?
Code Breaker
Guess the secret 4-color pattern using logic clues. Classic Mastermind-style deduction puzzle.
Bulls and Cows
Guess the secret number using logic clues. Classic pencil and paper deduction game.
Nonogram
Also known as Picture Logic. Use row and column clues to reveal a hidden pixel picture.
Zebra Puzzle
Solve Einstein's famous riddle. Use clues to deduce who owns what.
Lights Out Puzzle
Toggle lights to turn them all off - every click flips its neighbors too. Classic logic puzzle.
Tents and Trees
Pitch one tent beside every tree — tents never touch and the row and column counts must match. Camping logic puzzle.
Star Battle
Place one star in every row, column, and colored region — no two stars touching. Same format as the Queens puzzle.
Sliding & Spatial
Move pieces, plan paths, and manipulate space. Train spatial reasoning.
Classic 15-Puzzle
Slide numbered tiles to restore the correct order. Classic spatial reasoning challenge.
Sokoban
Push boxes onto target spots in this classic warehouse puzzle. Plan your moves carefully — no pulling allowed.
2048 Game
Slide and merge numbered tiles to reach 2048. Train strategic planning and spatial reasoning.
Pentomino Puzzle
Fit all 12 pentomino pieces into the frame. Each piece is 5 connected squares. Classic spatial puzzle.
Mahjong Solitaire
Match pairs of identical tiles to clear the board. Classic Shanghai-style tile matching puzzle.
Tower of Hanoi
Move the entire disk stack to another peg, one disk at a time. Larger disks cannot be placed on smaller ones.
Peg Solitaire
Jump pegs over each other to remove them. Leave only one peg.
Rush Hour
Slide blocking vehicles to free the red car. Classic traffic jam puzzle.
Numerical Logic
Use arithmetic and number constraints to solve grids. Train mathematical reasoning.
Sudoku
Fill the 9×9 grid so every row, column, and box contains 1-9. The world's favorite logic puzzle.
KenKen
Fill the grid with unique numbers per row/column. Cages must equal their target.
Sumplete
Delete numbers so each row and column adds up to its target sum. Number logic puzzle.
Futoshiki
Fill the grid with unique numbers per row/column following inequality signs.
Hidato
Connect consecutive numbers in a path through the grid. Fill the missing numbers.
Countdown Game
Combine numbers using +, −, ×, ÷ to reach the target. Classic TV show puzzle format.
Killer Sudoku
Sudoku with cage sums and no starting digits. Fill the grid using arithmetic and pure logic.
Binairo
Fill the grid with 0s and 1s — equal counts per line, no three in a row, no repeated lines. Also called Takuzu.
Cross Sums
Fill in the missing numbers in this arithmetic crossword.
Word & Decoding
Decode ciphers and unscramble letters. Train pattern recognition.
Word Scramble Game
Unscramble letters to form valid words. Train verbal fluency and vocabulary with 5-7 letter anagrams.
Cryptogram
Decode encrypted quotes by substituting letters. Classic cipher puzzle.
Word Search
Find hidden words in a grid of letters. Scan horizontally, vertically, and diagonally.