Bicycle Station
- Entropy windows
The brief
- Normal sudoku rules apply, i.e. each row, column, and 3x3 region has to contain the digits from 1 to 9 once each.
- Global Entropy: In the finished grid, each 2x2 box has to contain at least one low (1, 2, 3), one middle (4, 5, 6) and one high digit (7, 8, 9).
- Split Pea Lines: The sum of the digits on a line strictly between two circles is equal to a concatenation of the two values in the circles, in some order. For instance, 3_346_1 could be a valid split pea line, as 3+4+6=13, which is 1 concatenated with 3.