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 Sudoku rules. Also, there are some numbered shapes that must be put into the grid. Shapes can be rotated, but cannot be reflected.
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