Octo Puzzles are a combination between Sudoku and Kakuro and comes in Octo Puzzle Books by Doug Gardner
The goal of an Octo puzzle is to place the numbers 1 to 8 in each of the octagons such that the numbers are not repeated in any octagon, row, column, or diagonal. As clues, you get the numbers in the triangles at the beginning and end of the shorter diagonals, which are the sum of the four or six numbers in that diagonal. The number in the diamond is a different clue–it’s the sum of the four numbers that directly border the diamond.
More tip and techniques to solve Octo puzzles can be found on the Octo Puzzle Website.
Buy your Octo Puzzle Books at Amazon. Happy Puzzling!