Shape Sudoku by Serkan Yürekli
or solve online (using our beta test of Penpa-Edit tools; use tab to alternate between Sudoku number entry mode and a shading mode to manage the shape inventory.)
Theme: Four Squares (Originally on 2017 Brand’s Sudoku Open)
Author/Opus: This is the 167th puzzle from our contributing puzzlemaster Serkan Yürekli.
Rules: Standard Shape Sudoku rules.
Answer String: Enter the 5th row from left to right, followed by a comma, followed by the 7th row from left to right.
Time Standards (highlight to view): Grandmaster = 4:15, Master = 11:45, Expert = 23:30
Solution: PDF
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.
21:12.GM time looks out of this world !