OMICRON SIGMA PHIst
- Killer cages
- Kropki dots
- Thermometers
- Arrows
- Minimum and maximum cells
- Fortress
The brief
Normal Sudoku rules apply. Numbers on arrows sum to the number in that arrow's circle. Numbers on arrows DECREASE as you move away from the circle, except the red arrow does not follow this rule. All arrow circles that are greater than all adjacent cells have a blue maximum marking. Numbers in cages sum to the number in the top left corner of the cage. Numbers with a white dot between them are consecutive. Not all dots are given.