Newsletter #1 – August 2009
With a couple of months delay, I’ve created my first newsletter. It is available here. These newsletters will be sent out monthly by e-mail to those who sign up. You can sign up by submitting your e-mail address in the…
Author: djape
Traveler. Tanguero. Sailor. Puzzle maker. PhD student. Computer Scientist. Author of over 70 puzzle books.
My first Nurikabe puzzle (a difficult one)
Another addition to my portfolio of various number/logic puzzles are Nurikabe puzzles. I think these puzzles are being undeservedly somewhat neglected in the puzzle world and I intend to change that. The number of solving techniques and approaches that can…
How to solve Hitori: basic techniques
Solving Hitori puzzles is about recognizing patterns. I will show you some examples of those patterns. They can be split into two groups, one of those that depend solely on the initial positioning of numbers, and another group of patterns…
CalcuDoku clarification
In order to avoid any further confusion with KenKen(R) and KenDoku(TM) trademarks of Nextoy, LLC, I have changed the name of these puzzles to CalcuDoku. This name is also used by other publishers but it is not trademarked.
Weekend Special – CalcuDoku Samurai (Gattai-5) puzzle
This is my largest CalcuDoku puzzle so far. Previously I published a CalcuDoku Samurai 7×7, but this time the puzzle is even larger: 8×8 CalcuDoku Samurai for Saturday, February 28, 2009. Questions, comments and suggestions are more than welcome!
Hitori
UPDATE: After some debate with udosuk (see comments), I’ve decided to adopt the rule that every cell must be either black or white, it can’t be left “undecided”. I’ve changed the original puzzle accordingly so you can download it now.…
Sudoku Forum
Unfortunately the Sudoku forum on this website has been deleted. Perhaps it will be back at some point. Until then, feel free to comment bellow every post and page.
Sudoku Straights
It’s only Wednesday, but I decided to present you with another Sudoku Straights puzzle. Remember that they are shown every Friday on the Daily Sudoku variants page. The rules: 1. Use numbers 1-9. Numbers cannot be repeated in rows/columns. 2.…
Daily Hidoku
As you all may have noticed, I’ve finally started posting Hidoku puzzles on a daily basis! They can be found every day, Monday to Friday, on the Hidoku page!
Happy New Year!
I hope you all had a nice Christmas and that you are enduring the cold weather well. Well, those in the Northern hemisphere anyway. 🙂 Let me tell you about the changes that I plan for 2009: There will be…