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or solve online (using our beta test of Penpa-Edit tools).

Theme: Logical

Author/Opus: This is the 141st puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Place six pentominoes into each of the two top grids so that all twelve pentominoes are in one of the grids. Pentominoes can be rotated and reflected, but cannot touch each other not even diagonally. The numbers outside the grids indicate how many cells are used by pentominoes in that row/column. The shaded cells in the bottom grid must be part of a pentomino in one of the two top grids; the unshaded cells cannot be part of a pentomino in either grid.

Answer String: Enter the length in cells of each of the shaded pentomino segments from left to right for the marked rows, starting with the two marked rows in the left grid and then with the two marked rows in the right grid. Separate each row’s entry from the next with a comma.

Time Standards (highlight to view): Grandmaster = 3:30, Master = 6:45, Expert = 13:30

Solution: PDF

Note: Follow this link for other puzzles involving Pentominoes.

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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: Anti-symmetry

Author/Opus: This is the 140th puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Draw a single closed loop that passes vertically and horizontally through all cells. The loop must go through all of the given dots. When passing through a white dot, the number of cells on one side of the dot before turning must differ by 1 from the number of cells on the other side before turning. When passing through a black dot, the number of cells on one side of the dot before turning must be twice the number of cells on the other side before turning. (Not all possible dots are given; if a line crosses two dots, ignore the other dot and count cells as if it is not there.)

Also, see this example:

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 = 4:00, Master = 5:45, Expert = 11:30

Solution: PDF

Note: Follow this link for other less common Loop variations.

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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: Clue Symmetry and Logic

Author/Opus: This is the 139th puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Standard Battleships rules. Also, the arrows point at the closest ship segment(s) from that cell. No ship segment can be placed in a cell with an arrow.

Answer String: For each row from top to bottom, enter the number of the first column from the left where a ship segment appears (enter both digits if a two-digit number). 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 = 4:00, Expert = 8:00

Solution: PDF

Note: Follow this link for more variations on Battleships and this link for classic Battleships. If you are new to this puzzle type, here are our easiest Battleships to get started on. More Battleships puzzles can be found in The Art of Puzzles collection.

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or solve online (using our beta test of Penpa-Edit tools)

Theme: Logical

Author/Opus: This is the 138th puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Variation of Nurikabe. Shade some of the numbered cells so that the grid is divided into white regions, with each cell in such a region containing a number identical to the area of the region. Two white regions may only touch diagonally. All shaded cells must be connected with each other, but no 2×2 group of cells can be entirely shaded black.

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 = 2:15, Master = 3:30, Expert = 7:00

Solution: PDF

Note: Follow this link for classic Nurikabe puzzles on this website and this link for other variations on Nurikabe puzzles. If you are new to this puzzle type, here are our easiest Nurikabe puzzles to get started on. More Nurikabe puzzles can be in The Art of Puzzles collection.

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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: Clue Symmetry and Logic

Author/Opus: This is the 137th puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Standard Tapa rules.

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 = 3:00, Master = 4:45, Expert = 9:30

Solution: PDF

Note: Follow this link for other classic Tapa. If you are new to this puzzle type, here are our easiest Tapa to get started on.

PDF

or solve online (using our beta test of Penpa-Edit tools; use the tab key to alternate between shading and number entry modes)

Theme: Clue Symmetry and Logic

Author/Opus: This is the 137th puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Standard Nanro rules. Also, an even number of cells must be filled with a number in each row and in each column.

Answer String: Enter the length in cells of each of the segments labeled with numbers 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 = 7:30, Master = 9:30, Expert = 19:00

Solution: PDF

Note: Follow this link for other Nanro variations and this link for classic Nanro. If you are new to this puzzle type, please first try out our easiest Nanro to get started.

PDF

or solve online (using our beta test of Penpa-Edit tools in akari mode; left click to place a light bulb and right click to mark an unused cell with a dot; clicking and dragging draws lines for “seen” cells).

Theme: Logical (for patron Valvino)

Author/Opus: This is the 135th puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Add a light bulb to exactly one cell in each bold bordered white cell region so that each white cell is lit up. Each light bulb illuminates the cell it is in, as well as any horizontally and vertically adjacent cells, stopping at any black cells. No bulb can illuminate another bulb.

Answer String: For each row from top to bottom, enter the number of bulbs in that row. Enter these numbers as a single string with no separators.

Solution: PDF

Time Standards (highlight to view): Grandmaster = 1:15, Master = 2:15, Expert = 4:30

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Theme: Doubled Pairs

Author/Opus: This is the 134th puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Standard Kurotto rules.

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 with a comma.

Time Standards (highlight to view): Grandmaster = 2:45, Master = 4:00, Expert = 8:00

Note: Follow this link for other Kurotto puzzles. If you are new to this puzzle type, here are our easiest Kurotto to get started on.

Our subscribers receive access to bonus puzzles each week. We make these posts so those supporters have a space to comment on these puzzles, mark as FAVES, or log their solving. If you are interested in subscribing, click here for more info.

Theme: Clue Symmetry and Logic

Author/Opus: This is the 133rd puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Standard Tapa rules.

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 = 2:15, Master = 3:15, Expert = 6:30

Note: Follow this link for other classic Tapa. If you are new to this puzzle type, here are our easiest Tapa to get started on.

PDF

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 mark the black squares.)

Theme: No Zeroes

Author/Opus: This is the 132nd puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Variation of Sudoku. Instead of the digits 1 through 9, this puzzle uses the digits 1 through 7 as well as two black squares in each row, column, and bold region. Clues outside the grid indicate the sum of all digits between the black squares in that row/column.

Answer String: Enter the 2nd row from left to right, followed by a comma, followed by the 8th row from left to right. Use a capital X for all black squares.

Time Standards (highlight to view): Grandmaster = 8:30, Master = 10:30, Expert = 21:00

Solution: PDF

Note: Follow this link for other less common variations of Sudoku and this link for classic Sudoku. If you are new to this puzzle type, here are our easiest Sudoku to get started on.