This Sudoku puzzle Book presents 500 puzzles to test your solving skills. They are ALL rated HARD (3.0-3.9 per sudokusnake.com rating system - Author not affiliated). At this difficulty level, other basic 'beginner' Sudoku solving techniques are required to solve these puzzles - Techniques that are mostly required for these puzzles -1) Hidden Singles (by Cell/Box), 2) Hidden Singles, 3) Naked Singles, 4) Pointing, and 5) Claiming. The problems are a bit more challenging but after a few solved puzzles are part of you repertoire, you will be well under way to advance your solving techniques and perhaps continue on to be a MASTER of Sudoku. Each page contains 2 puzzles, side by side, landscape orientation. The grid size is 4.25"x4.25" on 8-1/2"x11" page size, which provides enough space in each box to write your candidates to assist in solving the puzzles. So many puzzles to solve, so little time, oh my
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