No friends on a hot day
- Killer cages
- Thermometers
- Negative constraint
- Kropki dots
The brief
Normal sudoku rules apply. Place the digits 1-9 once each in every row, column and 3x3 box. Digits on a thermometer must rise from the bulb end. Digits in a dotted cage without repeat sum to the total given in the top left corner of the cage. Cells separated by a black dot has one digit double the other (1:2 ratio) ALL dots are given.