Skyscrapers (2 in 1) by Prasanna Seshadri

Skyscrapers by Prasanna Seshadri

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Theme: Sevens

Author/Opus: This is the 142nd puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Standard Skyscrapers Rules, with two grids at the bottom to solve. The top grid indicates the sum of the digits in the bottom two grids in the corresponding positions.

Answer String: For the rightmost grid, enter the 4th row from left to right, followed by a comma, followed by the 6th row from left to right.

Time Standards (highlight to view): Grandmaster = 4:00, Master = 6:30, Expert = 13:00

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

Pentomino (2 in 1) by Prasanna Seshadri

Pentomino by Prasanna Seshadri

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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

Note: Follow this link for other puzzles involving Pentominoes.

Kropki Loop by Prasanna Seshadri

Kropki Loop by Prasanna Seshadri

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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:

Kropki Loop by Thomas Snyder

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

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

Battleships (Myopia) by Prasanna Seshadri

Battleships by Prasanna Seshadri

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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

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.

Nurikabe (Full) by Prasanna Seshadri

Nurikabe by Prasanna Seshadri

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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

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.

Schedule for Next Week

We’re back with new puzzles after taking some time to expand our online e-book store which now has three full books and five puzzle packets. We’ll be adding two more titles in the next month.

The next week is made up of “WPC practice” problems Prasanna prepared prior to last month’s championship.

Monday: Nurikabe (Full)
Tuesday: Battleships (Myopia)
Wednesday: Kropki Loop
Thursday: Pentomino (2 in 1)
Friday: Skyscrapers (2 in 1)
Saturday: Fillomino (Kropki)

Our patrons will also be receiving a bonus Bosnian Snake (Full) by Prasanna Seshadri, access to puzzle solutions, and a video walkthrough of the Saturday puzzle. If you’d like to receive some of these special rewards, please become one of our patrons on Patreon.

Update: Expanded eBook Store

We’ve recently completed an expansion of our eBook store, adding in several titles that up to now were only available to our Grandmaster-level patrons.

Joining our existing titles available in PDF form, The Art of Sudoku and The Art of Puzzles, are these fun collections:

Colossal Cave Collection by Roger Barkan – 100 hand-crafted Cave puzzles with hints to solve all of the puzzles.

Tapa and Variations by Serkan Yürekli – 65 puzzles includes 17 new classic Tapa (including 1 giant), 36 new puzzles spread across 9 variations, and 12 favorites from past puzzle competitions.

Kakuro and Variations by Serkan Yürekli – 77 puzzles includes 13 new classic Kakuro (including 1 giant), 56 new puzzles spread across 7 variations, and 8 favorites from past puzzle competitions.

LOTS O’ LITS by Grant Fikes and Prasanna Seshadri – 41 LITS puzzles including 2 giant puzzles. Also includes hints to help solve all the puzzles.

Fill o’ Fillomino by Grant Fikes – 40 Fillomino puzzles including 5 giant puzzles.

Tapa-Like Loop Collection by Prasanna Seshadri – 34 Tapa-Like Loop puzzles, including one giant puzzle.

We’ll be highlighting some of these titles more in the coming weeks, as well as releasing two more collections before the start of 2017.

Come back on 12/5 for our next week of web puzzles.