The Logical Brain
A beautiful collection of logic puzzle games. Free, offline, and completely in English.
Reveal a hidden image by filling cells based on sequences next to rows and columns. Drag to mark multiple cells at once.
Clear the board by matching pairs of identical tiles. A tile can only be taken when nothing lies on it and its left or right side is open.
Drag paths across a 3x3 grid of numbers and operators. Reach the target value exactly.
Place tents next to trees so that row and column counts match. Tents may not touch each other.
Fill irregular regions with numbers 1-5. Adjacent cells must never contain the same digit.
Fill the grid with zeros and ones. Equal counts per row/column, no three-in-a-row, and all rows unique.
Fill the grid with numbers. Ensure each row/column contains unique digits and satisfy greater-than and less-than signs.
Fill the white cells with digits 1-9. Every run adds up to the sum in the black cell before it, without repeating a digit.
Connect the dots into a single closed loop. A number says how many sides of that cell are part of the loop. No crossings or branches.
Connect islands with straight bridges so each island gets its shown number of bridges. All islands must be connected.
Fill the grid with digits without repeating one in a row or column. The digits in each outlined cage together give the outcome shown in its corner.
Divide the board into rectangular patches. Every patch holds exactly one clue, which can give the shape, the number of cells or both.
Slide the cars and trucks out of the way until the red car can drive out of the exit. Every vehicle only moves forwards or backwards.
Pour the coloured water from tube to tube until every tube holds one colour. Water only goes onto the same colour or into an empty tube.
Drag the points until no two lines cross each other.
Turn the tiles until all pipes form one network from the source, without loops or loose ends.
Colour the map with four colours, so that no two regions that share a border have the same colour.
Split the board into galaxies that each hold one dot and look the same when turned half round about it.
Put bulbs in the white cells until every cell is lit, without one bulb lighting another.
Draw one loop through every pearl: it turns on the black ones and goes straight through the white ones.
Link every cell into one path from 1 to the star: each cell points with its arrow at the next one.
Place every suspect in the house, one in every row and column, by their clues. The murderer was alone with the victim.
Open every cell without a mine. A number says how many mines lie around that cell. Every board can be solved with logic: you never have to guess.
The traditional 9x9 number puzzle. Fill the grid so that each row, column, and 3x3 block contains the digits 1-9 exactly once.
Fill the 6×6 grid with numbers 1-6. Each row, column, and marked 2×3 block must contain unique digits.
An exciting variant where the two main diagonals from corner to corner must also contain unique digits 1-9.
A challenging variant with four extra highlighted 3x3 squares (windows) that must each also contain unique digits 1-9.
Forget the standard 3x3 squares! In Jigsaw Sudoku, the 9 regions are irregularly shaped pieces of 9 cells each.
A sudoku without given digits. Every cell shows the candidates it can still hold: cross them off until one is left.
A sudoku without given digits. The digits in each cage add up to the sum in its corner, without repeating a digit.
Draw a single path that starts at 1, passes all numbers in order and fills every cell of the grid. Walls cannot be crossed.
Fill the board with suns and moons. Equal counts per row/column, no three-in-a-row, no two rows or columns alike, and every = and × sign satisfied.
Place one queen per row, column, and colored region without touching each other (not even diagonally).
Connect dots of the same color with a pipe. Pipes may not cross, and together they must fill the entire grid.
Crack the secret color code. After each guess you see how many pegs have the right color in the right place and how many only have the right color.
Combine 6 numbers with addition, subtraction, multiplication, and division to reach the target. Achieve it within 30 seconds!