or solve online (using our beta test of Penpa-Edit tools)
Theme: Powers of Two
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 = 1:15, Master = 1:45, Expert = 3:30
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools)
Theme: Mostly themeless, except for the logical solving path
Rules: Standard Cross the Streams rules.
Answer String: Enter the length in cells of each of the black segments from top to bottom for the marked columns, going in order from A to B to C to D and separating each entry with a comma.
Time Standards (highlight to view): Grandmaster = 6:00, Master = 10:00, Expert = 20:00
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools)
Theme: Star Battle of LITS (the shading is for decorative purposes only, but matches that on the author’s board game logo)
Rules: Standard Star Battle rules. Two stars per row, column, and region.
Answer String: For each row from top to bottom, enter the number of the first column from the left where a star appears. Enter these numbers as a single string with no separators.
Time Standards (highlight to view): Grandmaster = 2:45, Master = 4:45, Expert = 9:30
Solution: PDF
Note: Follow this link for other classic Star Battles and this link for Star Battle variations. If you are new to this puzzle type, here are our easiest Star Battles to get started on. More Star Battle puzzles can be found in The Art of Puzzles, in the book Star Battle by JinHoo Ahn, and in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli.
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: Threes Frame (and recommended soundtrack for the puzzle)
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 = 1:00, Master = 1:45, Expert = 3:30
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools; use tab to alternate between Sudoku = big entries and Number candidate = small entries in the corners of cells.)
Theme: Diagonals
Rules: Standard Tight Fit Sudoku rules. Range is 1-8.
Answer String: Enter the 1st column from top to bottom, followed by a comma, followed by the 6th column from top to bottom. (Note: for the tight fit cells, enter the top before the bottom as would be normal for the read order.)
Time Standards (highlight to view): Grandmaster = 0:50, Master = 1:15, Expert = 2:30
Solution: PDF
Note: Follow this link for other Tight Fit Sudoku puzzles on this website. If you are new to this puzzle type, here are our easiest Tight Fit Sudoku to get started on. More Tight Fit Sudoku can be found in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli and in The Art of Sudoku 2.
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 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)
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