or solve online (using our beta test of Penpa-Edit tools)
Theme: Mostly themeless
Rules: Standard Consecutive Sudoku rules. Since there are no bars in this grid, this should be considered a Non-Consecutive Sudoku.
Answer String: Enter the 1st column from top to bottom, followed by a comma, followed by the 9th column from top to bottom.
Time Standards (highlight to view): Grandmaster = 6:30, Master = 11:00, Expert = 22:00
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools; use Tab to go between number entry and shading modes)
This is a “Franken-Friday” puzzle variation.
Theme: Crypt-oceanography
Rules: Standard Nurikabe rules, except the size of each island has been encrypted. Each letter in this puzzle stands for a different positive integer, which must be determined while solving the puzzle. (Formatting note: space has been left in the cells for you to write the actual number values beneath each letter.)
Answer String: Enter the length in cells of each of the black segments (the unnumbered, connected “ocean”) from left to right for the marked rows, starting at the top. Separate each row’s entry from the next with a comma.
Time Standards (highlight to view): Grandmaster = 10:00, Master = 15:00, Expert = 30:00
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools; use tab to shift between shading mode and the linex mode where left click+drag draws lines and right click marks X’s)
Theme: Our 95th prescription, for May 9th
Answer String: Enter the length in cells of each of the cave segments from left to right for the marked rows, starting at the top. Separate each row’s entry with a comma.
Time Standards (highlight to view): Grandmaster = 4:00, Master = 8:00, Expert = 16:00
Solution: PDF
Note: Follow this link for other classic Caves. If you are new to this puzzle type, here are our easiest Cave Puzzles to get started on.
or solve online (using our beta test of Penpa-Edit tools; use tab to alternate between ship placement and shading modes. In ship placement mode, right click gives sea, left click gives circle/square, left click and drag for rounded ships.)
Theme: Shipping Lanes
Rules: Standard Battleships rules.
Answer String: For each row from top to bottom, enter the number of the first column from the left where a ship segment appears. If the row is empty, enter 0. Enter these numbers as a single string with no separators.
Time Standards (highlight to view): Grandmaster = 2:30, Master = 5:15, Expert = 10:30
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools in linex mode where left click+drag draws lines and right click marks X’s)
This is a “Twisted Tuesday” puzzle variation.
Theme: Totally symmetric?
Rules: Standard Masyu rules. Also, all possible white and black circles have been given. (In other words, the loop cannot turn in any unlabeled spot and then continue straight in the next two cells as that should be a black circle; the loop also cannot go straight in any unlabeled spot and then turn in one of the adjoining cells as that should be a white circle.)
Answer String: Enter the length in cells of the horizontal loop segments from left to right in the marked rows, starting at the top. If the loop only has vertical segments in the marked row, enter 0. Separate each row’s entry with a comma.
Time Standards (highlight to view): Grandmaster = 2:30, Master = 4:00, Expert = 8:00
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools)
Theme: Middles
Rules: Standard Skyscrapers rules.
Answer String: Enter the 1st row from left to right, followed by a comma, followed by the 5th row from left to right.
Time Standards (highlight to view): Grandmaster = 0:45, Master = 1:15, Expert = 2:30
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools)
Theme: Greek Crosses
Rules: Standard Tile Sudoku rules.
Answer String: Enter the 5th row from left to right, followed by a comma, followed by the 12th row from left to right.
Time Standards (highlight to view): Grandmaster = 5:00, Master = 8:30, Expert = 17:00
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools)
Theme: Don’t Cross the Streams! (Each arrow deflects to avoid a crossing with at least one other arrow.)
Rules: Standard Arrow Sudoku rules.
Answer String: Enter the 3rd row from left to right, followed by a comma, followed by the 4th row from left to right.
Time Standards (highlight to view): Grandmaster = 5:30, Master = 8:30, Expert = 17:00
Solution: PDF
Note: Follow this link for more Arrow Sudoku. If you are new to this puzzle type, here are our easiest Arrow Sudoku to get started on. More Arrow Sudoku puzzles can be found in The Art of Sudoku 2.
or solve online (using our beta test of Penpa-Edit tools)
Theme: Start Small – find your way to fill in those bigger squares.
Rules: Standard Tile Sudoku rules.
Answer String: Enter the 5th row from left to right, followed by a comma, followed by the 9th row from left to right.
Time Standards (highlight to view): Grandmaster = 3:00, Master = 4:45, Expert = 9:30
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools)
Theme: Walls
Rules: Standard Consecutive Sudoku rules.
Answer String: Enter the 2nd column from top to bottom, followed by a comma, followed by the 8th column from top to bottom.
Time Standards (highlight to view): Grandmaster = 3:15, Master = 5:00, Expert = 10:00
Solution: PDF