Sudoku Variant 1: Killer Sudoku

Welcome to Killer Sudoku! Standard sudoku rules apply (each row, column, and 3×3 box contains digits 1–9). Plus each cage (dashed outline) has a target sum — digits inside must add up to that sum with NO repeats within the cage.

🔢 Killer Sudoku — Cages & Sums

💡 Cage sums shown in corners. Each row/col/box + each cage: digits 1–9, no repeats.

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# What Is Killer Sudoku?

Killer Sudoku combines standard sudoku rules with cage sum constraints. Each dashed cage has a target sum — all digits inside must add up to that sum with NO repeats within the cage. Some Killer puzzles give you zero starting numbers, only cage sums!

🧠 Key Strategy: Start with forced cages — sum of 3 in 2 cells = {1,2}, sum of 17 in 2 cells = {8,9}. These forced combinations unlock the entire grid.

# FAQ

Q: Can digits repeat within a cage?
A: No. Each cage has unique digits, same as rows/columns/boxes.

Q: What's the difference from regular sudoku?
A: Killer puzzles often have no given numbers — only cage sums. You deduce everything from the arithmetic.

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