Logic Masters Deutschland e.V.

Title: Flight
Type: Irregular Sudoku
Link: CTC App link to Flight Sudoku
Link: F-puzzles link to Flight Sudoku
Variants: German Whispers, Entropic Lines, Kropki Pairs

0) Irregular Sudoku

• Place the digits 1 through 9 once each in every row, column, and region.

1) German Whispers

• Adjacent numbers along the green German Whispers line must have a difference of 5 or greater.

2) Entropic Lines

• Any 3 consecutive digits along the blue line must contain one digit from each of the following three groups: low {123}, middle {456}, and high {789}. e.g. 2 3 8 or 1 5 6.

3) Kropki Pairs

• 2.1) Two cells adjacent to a white dot have a difference of 1 and are consecutive.
• 2.2) Two cells adjacent to a black dot have a ratio of 1 to 2.
• 2.3) Not all dots have been given. There is no negative constraint.