Yajilin ebook and another update

Dear solvers,

We just added a Yajilin ebook from Murat Can Tonta and Prasanna Seshadri to our web store. This is a really great collection of 50 loop puzzles that we shared with subscribers this Spring but had not posted to the store yet. For those looking for more GMPuzzles challenges during our web hiatus, check out this book and our other collections in the store.

Besides posting this book, I have not been doing any puzzle solving or editing over the last month due to a lot of science work (another of the many projects my team plays a role in was just announced publicly). So it might be too optimistic to think that web-posting will restart in early 2020. But I am moving forward with the planning of responsibilities for a first hire for the company, and have some interesting new project ideas coming together that could form new outlets for our puzzles.

A new plan for me and GMPuzzles

Dear fans and subscribers: I’m just back from a fun trip to the World Puzzle Championship in Kirchheim, Germany. It was a successful trip in many respects (the US team was victorious for the first time since 2013, the last year before I took a three-year break off the team, and I was the 7th place individual). And it was good to see many friends in puzzles including regular subscribers and contributors to GMPuzzles.

This WPC followed an incredibly busy three month stretch for me in science (and I’m already right back into it as I write this morning). And without much time on weekends, I have been doing just enough to keep the web-side of this site going but have fallen pretty far behind on book editing and other tasks. This recent stretch has forced me to rethink how I should be spending my time in life, including what are the most critical pieces to make Grandmaster Puzzles into a successful company. So I have a five point update for you. While #1 may be tough to accept, I hope the promise of #2-5 keep you all as fans and subscribers as we move forward on a new plan for our publishing.

1. For at least the next 3 months, and possibly longer, we will not have any more free web weeks of puzzles on the site and we will be pausing subscription rewards in their current forms.

2. We will continue to release new books of puzzles; I will take advantage of some of the extra time from not having to do web posting to catch up on old titles like The Art of Sudoku 2 that are still unfinished, and also launch a new Grandmaster Puzzles Quarterly series that will be released every 3 months.

3. The most important and new change is tied to me rethinking how I focus my time and money with GMPuzzles. I am going to seriously invest my money in GMPuzzles over the next couple years, with an immediate plan within 3 months to hire a Managing Editor and then eventually part-time or full-time help in graphic design, web design, and software engineering to advance the work we can do.

4. This new team — particularly me and the Managing Editor — will define an updated business plan for GMPuzzles. This will likely include making the website much easier for new customers to find and get into our puzzles (an early concept, far from a finished design, to introduce an unfamiliar person to Tapa is here — we will do much better, but even this demo is 1000% better than the experience of landing on gmpuzzles.com/blog today). This business plan will almost certainly also include a digital plan to distribute our puzzles for a new generation of puzzle solvers via an enhanced web or app experience. Our audience is small but all of you are passionate, loyal, and dedicated fans of our puzzles. We need at least 10x if not 100x this audience to be a successful business, and we will try to crack more into the mainstream while not losing any of the quality and originality of our puzzle design that has grabbed your interest.

5. A big milemarker for us will be the 2021 World Puzzle Championship. I have co-organized a bid to host this tournament in Toronto and, if accepted, we will dedicate part of our Grandmaster Puzzles work both before and around the championship to bringing more attention to logic puzzles and competitive puzzling.

Arrow Sudoku by Murat Can Tonta [Bonus]

Our master+ subscribers receive access to two bonus puzzles each week in addition to other rewards. 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 and seeing these bonus puzzles, click here for more info.

Arrow Sudoku by Murat Can Tonta

Theme: Clue Symmetry and Logic

Author/Opus: This is the 162nd puzzle from our contributing puzzlemaster Murat Can Tonta.

Rules: Standard Arrow Sudoku rules.

Answer String: Enter the 1st row from left to right, followed by a comma, followed by the 6th row from left to right.

Time Standards (highlight to view): Grandmaster = 4:15, Master = 5:45, Expert = 11:30

Note: Follow this link for more Arrow Sudoku. If you are new to this puzzle type, here are our easiest Arrow Sudoku to get started on.

Frameless Sudoku by Prasanna Seshadri

Frameless Sudoku by Prasanna Seshadri

PDF

Theme: Empty Inside

Author/Opus: This is the 179th puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Standard Sudoku rules. Additionally, the numbers outside the grid indicate the sum of the first N cells in that row/column from that direction, for some value of N from 1 to 9.

Answer String: Enter the 8th row from left to right, followed by a comma, followed by the 5th column from top to bottom.

Time Standards (highlight to view): Grandmaster = 12:00, Master = 18:00, Expert = 36:00

Note: Follow this link for other 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.

Thermo-Sudoku by Ashish Kumar

Thermo-Sudoku by Ashish Kumar

PDF

Theme: Clueless; World Puzzle Championship (WPC)

Author/Opus: This is the 41st puzzle from our contributing puzzlemaster Ashish Kumar.

Rules: Standard Thermo-Sudoku rules.

Answer String: Enter the 4th row from left to right, followed by a comma, followed by the 8th row from left to right.

Time Standards (highlight to view): Grandmaster = 8:00, Master = 11:30, Expert = 23:00

Note: Follow this link for more Thermo-Sudoku puzzles. If you are new to this puzzle type, here are our easiest Thermo-Sudoku to get started on.

Even/Odd Sudoku by Ashish Kumar

Even Odd Sudoku by Ashish Kumar

PDF

Theme: Logical (originally in Ashish’s book “Enthralling Sudoku“)

Author/Opus: This is the 40th puzzle from our contributing puzzlemaster Ashish Kumar.

Rules: Standard Sudoku rules. Also, cells with a square contain an even digit; cells with a circle contain an odd digit.

Answer String: Enter the 5th row from left to right, followed by a comma, followed by the 9th row from left to right.

Time Standards (highlight to view): Grandmaster = 7:00, Master = 9:30, Expert = 19:00

Note: Follow this link for other Even/Odd Sudoku. Follow this link for classic Sudoku.

Sudoku with Dutch Snake by Serkan Yürekli

Frameless Sudoku by Serkan Yürekli

PDF

Theme: Clue Symmetry and Logic

Author/Opus: This is the 279th puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Standard Sudoku rules. Additionally, locate a snake (a 1-cell wide path) that connects the grey circles marked with 1 and 9. The snake cannot touch itself, even diagonally. All cells marked with white circles must be part of the snake. Along the path, the snake must pass straight through any cell with an odd number from the sudoku, and must make a 90-degree turn in any cell with an even number from the sudoku.

Answer String: Enter the 2nd row from left to right, followed by a comma, followed by the 5th row from left to right.

Time Standards (highlight to view): Grandmaster = 5:15, Master = 9:00, Expert = 18:00

Note: Follow this link for other 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.