
or solve online (using our beta test of Penpa-Edit tools)
Theme: Mini Hexes
Author/Opus: This is the 384th 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.
Difficulty: 3.5 stars
Time Standards (highlight to view): Grandmaster = 5:00, Master = 8:00, Expert = 16:00
Solution: PDF; a solution video is also available here.
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, in The Art of Puzzles 2, and in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli.
Our past week of TomTom puzzles is collected in this PDF and the solutions are in this PDF. The Sunday Stumper we just posted will be added to our large puzzle file later this week on our All Weekly PDFs page. There are more TomTom puzzles in these e-books in our store and we will be releasing a new TomTom collection in the next few weeks.
The daily solution videos are on the posts and linked below:
This next week will feature a variety mix of puzzles, all on hexagonal grids. Also, if you haven’t done it yet, this weekend is a Puzzle Grand Prix round co-authored by me and Serkan Yürekli.

or solve online (using our beta test of Penpa-Edit tools)
Theme: Tetrominoes
Author/Opus: This is the 383rd puzzle from Thomas Snyder, aka Dr. Sudoku.
Rules: Standard TomTom rules, using the integers 1-8.
Difficulty: 4 stars
Time Standards (highlight to view): Grandmaster = 11:00, Master = 15:30, Expert = 31:00
Solution: PDF; a solution video is also available here.
Note: Follow this link for classic TomTom and this link for TomTom variations. If you are new to this puzzle type, here are our easiest TomTom to get started on. More TomTom puzzles can be found in the TomTom collection, in The Art of Puzzles, and in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli.
2021 continues to be a year of transition and growth for GMPuzzles. Having brought Serkan Yürekli on-board as Managing Editor last year, and getting more support from the rest of our team, we’ve had the opportunity this year to focus on several different parts of our publishing business. At the start of the year I set our some objectives and key results for GMPuzzles. While this was just a set of internal targets, I wanted to write today to share our goals with our audience, suggest how we think we are doing, and get your feedback on anything more we need to be doing to meet our objectives.
Our past week of Yajilin puzzles is collected in this PDF and the solutions are in this PDF. There are more Yajilin puzzles in these e-books in our store.
The daily solution videos are on the posts and linked below:
This next week will feature TomTom puzzles. There will be a challenging TomTom as a Sunday Stumper for June 20th. I will also be back in the next day or two with the start of a mid-year check-in on our company goals.
Finally, this coming weekend is a Puzzle Grand Prix round co-authored by me and Serkan Yürekli.

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: Four Sight
Author/Opus: This is the 382nd puzzle from Thomas Snyder, aka Dr. Sudoku.
Rules: Standard Battleships rules. Use the indicated fleet.
Difficulty: 4 stars
Time Standards (highlight to view): Grandmaster = 7:15, Master = 11:30, Expert = 23:00
Solution: PDF; a solution video is also available here.
Note: Follow this link for classic Battleships and this link for Battleships variations. If you are new to this puzzle type, here are our easiest Battleships to get started on. More Battleships puzzles can be found in Battleships and Variations, in The Art of Puzzles, and in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli.
This past week of Fillomino puzzles is collected in this PDF and the solutions are in this PDF. If you haven’t had your “fill” of this genre yet, we have more Fillomino in several of our e-books.
We continue to work to improve our puzzle archive. Over the last few weeks, we have added 3+ more years of solution files to old puzzles. All puzzles from 2014+ now have PDFs on the individual puzzles and in the solution packets. We are now working to finish this for our first year 2013 to complete this project. Also, we’ve added Penpa-Edit links for more puzzle styles: Arrow Sudoku, Consecutive Pairs Sudoku, Consecutive Sudoku, and Thermo-Sudoku have been added within the last few weeks. An active list of our completed styles is on our Penpa notes page. By the end of the year we expect “official” supported forms to be posted for most of the puzzles on the site including automatic answer checking.
(Note that we still see some people making their own web versions of puzzles and adding them to the comments. We will only allow these as temporary links if they include the author name and a link back to the site in the digitized form or if we can edit them to add the same; anything else is not in the spirit of our Creative Commons license and some of the outside link aggregators do not credit authors at all which is why we do not want to support links that can separate the author/GMPuzzles from the work. For commenters making their own solving versions, our preference is to use http://gmpuzzles.com/penpa-edit.)
The daily solution videos are on the posts and linked below:
This next week will feature Battleships puzzles.