Sudoku Download Killer Sudoku PDFs
Each PDF contains multiple killer sudoku puzzles with cage sums and complete solutions. Choose your difficulty!
Easy Killer Sudoku
Small cages with straightforward sums — a gentle introduction to killer logic.
Download PDFMedium Killer Sudoku
Larger cages and trickier sums requiring cage combination analysis.
Download PDFHard Killer Sudoku
Complex cages demanding Rule of 45, innies/outies, and advanced deduction.
Download PDFExpert Killer Sudoku
The hardest killer puzzles — multi-step cage logic and advanced strategies required!
Download PDFPrintable Killer Sudoku: arithmetic meets logic
Killer sudoku (also called sum sudoku) uses a standard 9×9 grid, but instead of pre-filled numbers, you get dotted cages — groups of cells with a small target number. The digits in each cage must sum to that target, with no repeats within a cage. Combined with the standard row, column, and box constraints, this creates a deeply satisfying blend of arithmetic and deduction.
Killer sudoku was first published in Japan in 2005 under the name "samunamupure" (sum number place). Despite the intimidating name, it's actually quite approachable once you learn a few key cage-sum combinations.
📋 Why print killer sudoku?
- Notation space — Killer sudoku requires lots of pencil marks. Paper gives you room to write cage-sum possibilities beside each cage.
- No given digits — Most killer puzzles start completely blank, so there are no "easy" placements. Every digit must be deduced.
- Mental arithmetic — Great for keeping your addition and subtraction skills sharp alongside logical reasoning.
- Multiple difficulty levels — From gentle 4-cell cages to brutal 5+ cell cages with many possible combinations.
Memorise the "magic numbers": a 2-cell cage summing to 3 can only be {1,2}, a cage summing to 17 can only be {8,9}. These forced combinations are your fastest route into any killer puzzle.
🧠 Key strategies for killer sudoku
- Cage combination analysis — List all possible digit sets for each cage sum and size, then cross-reference with row/column/box constraints.
- Rule of 45 — Each row, column, and box sums to 45. If you know all but one cage in a unit, the remaining cage total is determined.
- Innies and outies — Cells that "stick out" of or "poke into" a row/column boundary reveal individual cell values through subtraction.
These strategies build naturally on classic sudoku skills. If you enjoy killer, try X-Sudoku for another constraint-based variant.
🎮 Play Killer Sudoku Online
Can't wait for the printables? Play Killer Sudoku online right now with instant cage-sum checking and hints. Or explore printable samurai sudoku for a multi-grid challenge.