Calcudoku, 121 Advanced Puzzles: volume IV

After a three year wait there finally is a 4th volume of the ＂Calcudoku, Advanced Puzzles’＂ series. If you’re looking for the most challenging Calcudoku puzzles, then look no further.

Included are: puzzles using zero, negative numbers, modulo and exponentiation operators, puzzles without operators (called no-op’’ or mystery’’ Calcudoku), twin puzzles, and many extra large puzzles (10x10 to 15x15), and even one 17x17 puzzle! New in this volume: more puzzle variations andmore puzzles with binary operators (including the new AND operator).

This voume IV has 121 completely new puzzles, explanations for the various puzzle variations, solving strategies, and all solutions.

You can submit puzzle solutions online at www.calcudoku.org and score points for each correct solution.