Number Logic Puzzle 1625
Less Than (or Greater Than) Sudoku has no given clues (digits). Instead, there are "greater than" (>) or "less than" (<) signs between adjacent cells, which signify that the digit in one cell should be greater than or less than another.
The goal is to fill a grid with digits so that each column and each row contain the digits only once.
This puzzle has Irregular Blocks, also known as cages. Every cage contains each of the digits only once.