7 Types of logic puzzles

Sudoku: A number puzzle where the player must fill a grid with digits so that each column, each row, and each of the nine 3×3 sub-grids that compose the grid contains all of the digits from 1 to 9.

Kakuro: A number puzzle that is similar to a crossword, but with numbers. The player must fill in the blank squares with digits in order to add up to the number provided in the clue above or to the left.

Hitori: A number puzzle where the player must blacken some of the squares in a grid such that no two blackened squares are adjacent horizontally or vertically and that every number appears once in each row and column.

Nonogram: A puzzle where the player must color in a grid according to the numbers on the top and left sides, which indicate how many consecutive squares of that color are in each row and column.

Slitherlink: A puzzle where the player must draw lines around the dots on a grid so that the number of lines around each dot equals the number inside the dot, and that the lines form a single loop with no intersections.

Grid Deduction: A puzzle where the player must deduce the positions of different elements in a grid (e.g. houses, people, color) based on clues or constraints given.

Cryptarithmetic: A mathematical puzzle where a mathematical equation must be formed by replacing a number of letters by digits.