PDF

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

Theme: JH (for Jamie Hargrove)

Author/Opus: This is the 263rd puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Variation of LITS. Shade exactly four cells in each outlined region to form an S, L, I, C, or Y tetrahex. When all regions have been shaded, the following conditions must be true:
1) All shaded cells will be connected through a network of adjacent shaded cells;
2) No three shaded cells will share a common vertex;
3) When two tetrahexes share an edge in adjacent regions, they must not be the same type (S, L, I, C, or Y), regardless of potential rotations or reflections.

Answer String: Enter the length in cells of each of the shaded segments from lower left to upper right for the marked rows. Separate each row’s entry from the next with a comma.

Time Standards (highlight to view): Grandmaster = 4:45, Master = 8:00, Expert = 16:00

Solution: PDF

Note: Follow this link for more variations of LITS and this link for classic LITS. If you are new to this puzzle type, here are our easiest LITS to get started on. More LITS puzzles can be found in LOTS O’ LITS by Grant Fikes and Prasanna Seshadri.

Our last week of puzzles from guest contributors can be found in this PDF.

This upcoming week is another “Patrons’ week”, featuring requested puzzle styles from our top patrons. As usual for these patrons’ weeks, the difficulty is on the higher end.

Monday: Tapa (Borders) by Murat Can Tonta
Tuesday: Castle Wall by Prasanna Seshadri
Wednesday: Fillomino by Grant Fikes
Thursday: SLICY by Thomas Snyder
Friday: Arrow/Shape/Thermo-Sudoku by Prasanna Seshadri
Saturday: Japanese Sums by Serkan Yürekli

Our supporters will also be receiving a bonus LITS by Carl Worth, access to puzzle solutions, and a written walkthrough of the Saturday puzzle. If you’d like to receive some of these special rewards, please click here for more info.

PS: Our webmaster has been working on the solver widget and it looks like it may be back online again. Please tell us if you are having any issues with the widget and, if so, what browsers you are using. You might have to clear your cache or do a hard refresh (Ctrl+F5) to see the updated widget.

Our recent Colossal Cave Collection week can be found in this PDF.

This week features a mix of guest contributions to the website. We get a lot of great submissions every year, and think you’ll enjoy the selections we have for you this time.

Monday: Slitherlink by Walker Anderson
Tuesday: Fillomino by Izak Bulten
Wednesday: Balance Loop by Bryce Herdt
Thursday: Country Road by Bryce Herdt
Friday: Cave by Walker Anderson
Saturday: Sum Star by Dan Adams

Our supporters will also be receiving a bonus Tapa by Prasanna Seshadri, access to puzzle solutions, and a video walkthrough of the Friday puzzle. If you’d like to receive some of these special rewards, please click here for more info.

Our last week of puzzles, including Balance Loop and Tapa (Islands), can be found in this PDF.

This week marks a new paperback book release for us. The Colossal Cave Collection by Roger Barkan, which has been in our e-store for several months, is now available in print at Amazon, Barnes and Noble, and other fine retailers. We’ll be posting some puzzles from the book, as well as one special new variation from Roger, throughout the week.

We are planning to release Logic Puzzles 101 and then The Art of Puzzles in paperback form this February and March. Besides print versions of existing titles, we are on track to release ~12 e-books this year. This weekend our grandmaster patrons received an early release of the first section (Yajilin and Double Yajilin) from The Art of Puzzles 2: Double Trouble. The e-book will be in our store soon, but if you want to be sure to get all our e-books early then please click here for more info.

Our first week of puzzles from 2017 can be found in this PDF.

This week will feature two “mini-weeks” with these variations: Balance Loop, and Tapa (Islands). The puzzles are harder than usual (probably starting at mid-week difficulty).

Our supporters will also be receiving a bonus Fillomino by Murat Can Tonta, access to puzzle solutions, and a video walkthrough of the Friday puzzle. If you’d like to receive some of these special rewards, please click here for more info.

PDF

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: Just One

Author/Opus: This is the 262nd puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Standard Battleships rules. Use the indicated fleet.

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 just the last digit for any 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 = 2:45, Master = 3:30, Expert = 7:00

Solution: PDF

Note: Follow this link for other 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.

We’re starting January with Just One week of puzzles. How often will we publish on the web in 2017? Only time will tell.

Monday: Nanro by Grant Fikes
Tuesday: Castle Wall by Serkan Yürekli
Wednesday: Battleships by Thomas Snyder
Thursday: Cross the Streams by Serkan Yürekli
Friday: Pata by Serkan Yürekli
Saturday: Pentominous by Carl Worth

Our supporters will also be receiving a bonus Cave by Murat Can Tonta, access to puzzle solutions, and a video walkthrough of the Saturday puzzle. If you’d like to receive some of these special rewards, please click here for more info.

All of the puzzles selected by our solvers as the “Best of 2016” are gathered in this PDF. You can read more about them in our other “Best of” posts.

Here are our best Shading puzzles of 2016, now our second most frequent category behind Loop/Path with 50 posts this past year.

Leading off this list was an Easy as LITS variation from Serkan that had a super high FAVE/solve ratio as a patron bonus puzzle. [Note: this is one of two supporter bonuses to win a Best Of award this year, but they’ll stay blurred on this site for non-patrons.]

Prasanna was our shading puzzle master this year, including this surprise of a Nurikabe variation prepared as practice for the WPC with a clean logical theme.

Prasanna also created a new Nanro variation “by accident” this year, which we call Nanro (Signpost). This early Spiral-themed example was well reviewed.

But the two best shading puzzles of this year were a kind of call and response from Prasanna and our audience, based around a “Windows” variation Prasanna experimented with. This Tapa in particular got high scores from the Windows week.

And then inspired guest contributor Jack Lance to make another version, this time with overlapping windows.

Basically tied in votes and clearly connected in origin, these Tapa (Windows) together are the best Shading Puzzle of 2016.

Here are our best Region Division puzzles of 2016, selected from the 39 web posts in this category.

While we didn’t have as many guest contributions in 2016 as in earlier years with the site, there were still some stand-out puzzles from our guests including this magnificent Cave by Bryce Herdt with Fibonacci Spiral theme.

Another Cave, this time a Diagonal variation from Prasanna Seshadri, also got top marks from many solvers.

Carl Worth demonstrated the quality that earned him a contributing puzzlemaster position this year with a tough Fillomino puzzle with a dominoes theme.

The best Region Division puzzle this year though went to this combination of Pentominous and Star Battle by Grant Fikes that gave solvers a unique kind of logical challenge.