or solve online (using our beta test of Penpa-Edit tools in edgex mode where left click+drag draws lines and right click marks X’s)
Theme: Windmill
Rules: Standard Slitherlink rules.
Answer String: Enter the length in cells of each of the internal loop 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 = 1:35, Master = 2:15, Expert = 4:30
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools)
Theme: 64
Rules: Standard Nurikabe rules.
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 = 1:00, Master = 2:00, Expert = 4:00
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)
Theme: Almost Twisted Symmetry
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 = 0:45, Master = 1:00, Expert = 2:00
Solution: PDF
(View image directly for larger form.)
or solve online (using our beta test of Penpa-Edit tools)
Theme: Clue symmetry and logic
Rules: Standard Yajilin rules.
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 = 8:30, Master = 12:00, Expert = 24:00
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools)
Theme: Two by Three by Four
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 = 3:15, Master = 4:30, Expert = 9:00
Solution: PDF
Note: Follow this link for other classic Sudoku. If you are new to this puzzle type, here are our easiest Sudoku to get started on. More classic Sudoku puzzles can be found in The Art of Sudoku, The Art of Sudoku 2 and in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli.
or solve online (using our beta test of Penpa-Edit tools)
Theme: Logical
Rules: Standard Yajilin rules.
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 = 3:30, Expert = 7:00
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools)
Theme: Paired Islands
Rules: Standard Nurikabe rules.
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 = 1:00, Master = 1:20, Expert = 2:40
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools)
Theme: Almost All Two Easy!
Rules: Standard Yajilin rules.
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 = 0:55, Master = 1:10, Expert = 2:20
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)
Theme: TC
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 = 1:00, Master = 1:30, Expert = 3:00
Editor’s Note: Today we add Tom Collyer to our list of Contributing Puzzlemasters. A noted sudoku solver and puzzle author, Tom’s Friday Puzzles have been an online puzzle mainstay for many years — not to be confused with Thomas‘s Friday Puzzle which started around the same time.
Solution: PDF