Mazzel Sudoku

Normal Sudoku Rules apply: place the digits 1 to 9 in each row, column and 9×9 box.

• German Whisper Lines (green): adjacent digits must have a difference of at least 5
• Dutch Whisper Lines (orange): adjacent digits must have a difference of at least 4
• Region Sum Lines (blue): these lines have the same value in each 3×3 box they intersect (different lines have different values)
• Thermo Lines (grey): digits along the thermometer must strictly increase from the bulb
• Killer Cages: digits in a cage must sum to the small number in the top-left corner
• Black Kropki Dots: digits have a 2:1 ratio

Normal Sudoku Rules apply: place the digits 1 to 9 in each row, column and 9×9 box.

• German Whisper Lines (green): adjacent digits must have a difference of at least 5
• Region Sum Lines (blue): these lines have the same value in each 3×3 box they intersect
• Parity Thermo Lines (red): digits along the thermometer must strictly increase from the bulb. Digits must alternate between odd and even on these lines.
• Entropic lines (peach): every set of 3 consecutive digits must contain one low (123), one medium (456), and one high (789) digit.
• Killer Cages: digits in a cage must sum to the small number in the top-left corner, digits cannot repeat within a killer cage
• Black Kropki Dots: digits have a 2:1 ratio
• White Kropki Dots: digits are consecutive

Normal Sudoku Rules apply: place the digits 1 to 9 in each row, column and 9×9 box.

• Dutch Whisper Lines (orange): adjacent digits must have a difference of at least 4
• Tokyo Whisper Lines (red): adjacent digits must have a difference of at least 6
• Region Sum Lines (blue): these lines have the same value in each 3×3 box they intersect
• Thermo Lines (grey): digits along the thermometer must strictly increase from the bulb
• Killer Cages: digits in a cage must sum to the small number in the top-left corner. digits CAN repeat in killer cages if allowed by other sudoku rules.

Normal Sudoku Rules apply: place the digits 1 to 9 in each row, column and 9×9 box.

• German Whisper Lines (green): adjacent digits must have a difference of at least 5
• Tokyo Whisper Lines (red): adjacent digits must have a difference of at least 6
• Thermo Lines (grey): digits along the thermometer must strictly increase from the bulb
• V's and X's: digits separated by a V must sum to 5, digits separated by a X must sum to 10
• Little Killers: numbers outside the grid indicate the sum of the digits on the diagonal in the direction of the arrow
• Negative ratio constraint: neighboring digits cannot have a ratio of 5:1

Normal Sudoku Rules apply: place the digits 1 to 9 in each row, column and 9×9 box.

• German Whisper Lines (light green): adjacent digits must have a difference of at least 5
• Tokyo Whisper Lines (red): adjacent digits must have a difference of at least 6
• Region Sum Lines (blue): these lines have the same value in each 3×3 box they intersect
• Modular Lines (dark green): every set of three sequential digits along a modular line must contain a complete set of one digit from {1,4,7}, one from {2,5,8} and one from {3,6,9}
• Black Kropki Dots: digits have a 2:1 ratio
• Maximum Cells (grey): maximum cells contain a digit that's bigger than all orthogonal adjacent cells

Normal Sudoku Rules apply: place the digits 1 to 9 in each row, column and 9×9 box.

• German Whisper Lines (green): adjacent digits must have a difference of at least 5
• Dutch Whisper Lines (orange): adjacent digits must have a difference of at least 4
• Region Sum Lines (blue): these lines have the same value in each 3×3 box they intersect
• Thermo Lines (grey): digits along the thermometer must strictly increase from the bulb
• Palindrome (purple): digits along a palindrome line must read the same forwards and backward (i.e. the line is symmetrical)
• Killer Cages: digits in a cage must sum to the small number in the top-left corner

Normal Sudoku Rules apply: place the digits 1 to 9 in each row, column and 9×9 box.

• Tokyo Whisper Lines (red): adjacent digits must have a difference of at least 6
• Dutch Whisper Lines (orange): adjacent digits must have a difference of at least 4
• Region Sum Lines (blue): these lines have the same value in each 3×3 box they intersect (different lines have different values)
• Killer Cages: digits in a cage must sum to the small number in the top-left corner
• Black Kropki Dots: digits have a 2:1 ratio
• White Kropki Dots: digits are consecutive

Normal Sudoku Rules apply: place the digits 1 to 9 in each row, column and 9×9 box.

• German Whisper Lines (green): adjacent digits must have a difference of at least 5
• Tokyo Whisper Lines (red): adjacent digits must have a difference of at least 6
• Region Sum Lines (blue): these lines have the same value in each 3×3 box they intersect (different lines have different values)
• Killer Cages: digits in a cage must sum to the small number in the top-left corner
• Black Kropki Dots: digits have a 2:1 ratio
• Little Killers: numbers outside the grid indicate the sum of the digits on the diagonal in the direction of the arrow