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.
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. Match the sum clues in the black cells and avoid duplicate digits in a run.
Connect the dots into a single closed loop that satisfies the numbers in the cells. 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 Latin square with numbers and satisfy the arithmetic sum and product clues per colored region.
Divide the board into contiguous patches of equal size so that each patch contains exactly the shown colored symbols.
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.
Draw a single smooth zipper from start to end that perfectly satisfies all numbered step clues along the route.
Fill the board with suns and moons. Ensure equal counts, triplet exclusion, and satisfy all relation markers.
Place one queen per row, column, and colored region without touching each other (not even diagonally).
Connect matching colored dots with continuous lines. Cover the entire grid without crossing lines.
Combine 6 numbers with addition, subtraction, multiplication, and division to reach the target. Achieve it within 30 seconds!