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Killer sudoku

A sudoku where the clues are sums. Each dotted cage shows the total of its squares, and no digit repeats inside a cage, as well as the usual rows, columns and boxes.

Every puzzle is proved by a solver that knows the cage rules to have exactly one solution. None uses a one-square cage, which would just be a given digit in disguise, and each says honestly whether it has any given digits at all.

Killer sudoku 1

Cages only, no given digits.

Killer sudoku239151310149813191114411111716133112015817139101417910712
Show the answersKiller sudoku 1, answer key

Killer sudoku 2

1 given digit as well as the cages.

Killer sudoku111472411926111517131010171217151211171311513891517711177
Show the answersKiller sudoku 2, answer key

Killer sudoku 3

Cages only, no given digits.

Killer sudoku1291330108111618161610129916916136151011248135166512183
Show the answersKiller sudoku 3, answer key

Killer sudoku 4

1 given digit as well as the cages.

Killer sudoku 4
Show the answersKiller sudoku 4, answer key

Killer sudoku 5

1 given digit as well as the cages.

Killer sudoku 5
Show the answersKiller sudoku 5, answer key

Killer sudoku 6

1 given digit as well as the cages.

Killer sudoku 6
Show the answersKiller sudoku 6, answer key

Killer sudoku 7

1 given digit as well as the cages.

Killer sudoku 7
Show the answersKiller sudoku 7, answer key

Killer sudoku 8

1 given digit as well as the cages.

Killer sudoku 8
Show the answersKiller sudoku 8, answer key