Theme: Big Circle
Author/Opus: This is the 7th puzzle from guest contributor Rajesh Kumar.
Rules: Standard Sudoku rules. Additionally, if a grey circle is given between two adjacent cells, then the two numbers in those cells must be consecutive. (Note: not all grey circles are given; adjacent cells without a circle may contain either consecutive numbers or nonconsecutive numbers.)
Difficulty: 3 stars
Time Standards (highlight to view): Grandmaster = 3:45, Master = 6:00, Expert = 12:00
Solution: PDF; a solution video is also available here.
Note: Follow this link for other variations of Sudoku and this link for classic Sudoku. If you are new to this puzzle type, here are our easiest Sudoku to get started on.