High heat from the outset
- Killer cages
- Kropki dots
- Thermometers
- Quadruples
The brief
Normal sudoku rules apply. Place the digits 1-9 once each in every row, column and 3x3 box. Digits in a dotted cage sum to the total given in the top left corner of the cage without repeat. Digits on a thermometer must rise from the bulb end. Cells separated by a black dot has a 1:2 ratio. Digits in a circle must be in one of the cells it touches and may repeat.