or solve online (using our beta test of Penpa-Edit tools)
Theme: Triple Play
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 = 4:00, Master = 6:30, Expert = 13:00
Solution: PDF
(View image directly for larger form.)
or solve online (using our beta test of Penpa-Edit tools; use tab to shift between shading mode and the composite Yajilin mode where left click marks cells, right click marks dots in cells or X’s on edges, left click+drag draws lines.)
Theme: Logical
Answer String: Enter the length in cells of each of the shaded segments 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 = 8:30, Master = 14:00, Expert = 28:00
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools; use tab to alternate between a composite mode for line/edge drawing and a letter entry mode.)
Theme: Logical
Rules: Variation of Fillomino rules where regions with the same shape must avoid each other instead of regions with the same size (all regions in a pentominous puzzle are pentominoes). See an earlier Pentominous puzzle here.
Specifically, divide the grid into 45 pentominoes so that no two pentominoes of the same shape (including rotations/reflections) share an edge. A cell with a letter in it must be part of the pentomino shape normally associated with that letter as given below the grid. Not all pentomino shapes need appear.
Answer String: Enter the letter associated with the pentomino occupying each cell in the marked rows from left to right, separating the rows with a comma. Use CAPITAL LETTERS!
Time Standards (highlight to view): Grandmaster = 6:30, Master = 10:30, Expert = 21:00
Solution: PDF
Note: Follow this link for other puzzles involving Pentominoes.
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: Dominoes — in both the clues and the variation rules
Rules: Standard Cave rules. Also, the exterior of the cave (the cells not seen by the numbers) must be divisible into dominoes (1×2 rectangles) in at least one way.
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 = 4:15, Master = 9:00, Expert = 18:00
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 shift between shading mode and the composite Yajilin mode where left click marks cells, right click marks dots in cells or X’s on edges, left click+drag draws lines.)
Theme: Logical
Answer String: Enter the length in cells of each of the shaded segments 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 = 5:00, Master = 7:45, Expert = 15:30
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools)
Theme: Clue Symmetry and Logic
Rules: Variation of Skyscrapers rules. Place digits 1-6 into the grid so that no digit is repeated within a row or column. Digits outside the grid indicate the number of buildings that can be seen from the corresponding direction. The buildings form two-digit numbers and the relations between some numbers are shown with a greater than/less than sign.
Or, see here.
Answer String: Enter the 3rd row from left to right, followed by a comma, followed by the 4th column from top to bottom.
Time Standards (highlight to view): Grandmaster = 5:15, Master = 7:30, Expert = 15:00
Solution: PDF
View image directly for a larger form.
or solve online (using our beta test of Penpa-Edit tools)
Theme: 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 = 12:00, Master = 22:30, Expert = 45:00
Solution: PDF
or solve online (using our beta test of Penpa-Edit tools; use tab to alternate between ship placement, shading, and number entry modes. In ship placement mode, right click gives sea, left click gives circle/square, left click and drag for rounded ships.)
Theme: Logical
Rules: Hybrid of Battleships and Criss-Cross (Nansuke) puzzles:
Place the given fleet into the grid so that no two ships touch, even diagonally. In the remaining unused cells, place the given numbers criss-cross style so that they can be read from left to right or from top to bottom. All possible entries with two or more connected digits are given.
Answer String: Entry the contents of the two marked columns from top to bottom, using a capital X for any cell with a ship segment.
Time Standards (highlight to view): Grandmaster = 4:00, Master = 10:30, Expert = 21:00
Solution: PDF
(view image directly for a larger format.)
or solve online (using our beta test of Penpa-Edit tools; use tab to shift between shading mode and the composite Yajilin mode where left click marks cells, right click marks dots in cells or X’s on edges, left click+drag draws lines.)
Theme: Group Think
Answer String: Enter the length in cells of each of the shaded segments from left to right for the marked rows, starting at the top. Separate each row’s entry from the next with a comma. A double-digit number should have both digits entered.
Time Standards (highlight to view): Grandmaster = 2:15, Master = 4:30, Expert = 9:00
Solution: PDF
Editorial Note: If you have been enjoying Serkan’s puzzles, you may want to try SudokuCup 10 this weekend where he has provided all the sudoku puzzles. And daily Tapa puzzles continue to be at Logic Masters India for the Classic Tapa Contest. Serkan is indeed the Puzzle Robot.
or solve online (using our beta test of Penpa-Edit tools)
This is a “Franken-Friday” puzzle variation.
Theme: Logical
Rules: Standard Skyscrapers rules. Also, the digits do not repeat along the two main diagonals.
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 = 3:30, Master = 5:15, Expert = 10:30
Solution: PDF