Sum Grid: Killer Sudoku

Killer Sudoku without guessing. Every puzzle has exactly one solution, checked to be solvable by logic alone before it reaches you. No ad ever interrupts a puzzle. The only ad you don't ask for comes after you finish. Climb to the Summit: every solved level lays a block in one of ten monuments. Sum Grid is the classic Killer Sudoku: Sudoku rules plus cages whose digits must add up to their sum. Every board is checked for a unique solution, then solved end to end by the same logic engine that powers the hint button. When you are stuck, there is always a next logical step. WHY IT IS DIFFERENT • Verified, no guessing — one solution per puzzle, reachable by logic alone • Cages you can read — soft tinted trays with the sum on a tab, clearly apart from the box lines. Prefer the newspaper look? Classic lines are one switch away • Hints that explain — the next step names the technique (cage…