Tag Archives: INSANE

Saturday Special – Extra Groups Kakuro

Rules: Solve the puzzle so that the numbers in every horizontal and vertical region add up to the sum indicated for that region. Numbers CAN NOT be repeated in any region. Additional Rule: The yellow groups of 3×3 blocks contain the numbers 1-9 once and only once.  It took me about 10 hours spread out […]
Posted in Free sample puzzles, Kakuro | Also tagged , , , | 10 Responses

Non-Consecutive Sudoku Compendium

To the best of my knowledge, no book exists with non-consecutive sudoku puzzles. Well, that’s about to change NOW! I’ve prepared 150 Non-Consecutive Sudoku puzzles and put them in a book called “Non-Consecutive Sudoku Compendium”. This sudoku compendium is available as a paperback and can be purchased on Amazon. In this book you will find: […]
Posted in Puzzle books, Sudoku Variants | Also tagged , , , , , , , , , , , , , , | 11 Responses

Revenge of Killer Sudoku: 150 puzzles

About a year after my first Killer Sudoku book, I am ready to present you with a completely new book with my Killer Sudoku puzzles: Revenge of Killer Sudoku: 150 puzzles has been released! (click on the cover page to go to lulu and buy!) US $5.99 or £3.30 or €4.82 (PDF e-book) (payable by […]
Posted in General, Killer Sudoku, Puzzle books | Also tagged , , , , , , , , , , , , , , , , | 6 Responses

Weekly Kakuro (Cross Sums) #2

To celebrate the 2nd anniversary of my first truly “INSANE” Killer Sudoku, posted on September 27, 2005, this week’s Kakuro is rather large and fairly difficult. Let me know how you like it. Rules: Solve the puzzle so that the numbers in every horizontal and vertical region add up to the sum indicated for that […]
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Insane Killer Sudoku

Ok, a few regular readers have requested an INSANE Killer Sudoku puzzle so I had to respond. This puzzle should be very difficult to solve. In fact, it might require some trial&error attempts to be solved. Do not attempt to solve this puzzle unless you are willing to accept that! Click on the puzzle thumbnail […]
Posted in Free sample puzzles, Killer Sudoku | Also tagged , , , | 7 Responses

Daily Consecutive/Non-consecutive puzzles

Well, it’ time to revive the “Daily Sudoku variants” page. First of all, that page has been renamed to “(Non)consecutive”. Since this variation of Sudoku puzzles has proven to be more popular than odd/even and greater/less than, I have decided to give you one such puzzle every day, Monday to Friday. Hardest puzzles (IQ/Insane) will […]
Posted in General, Killer Sudoku, Sudoku Variants | Also tagged , , , , , , , , , , , , , | 3 Responses

First INSANE September 27 anniversary

Well, folks, one year has passed since I posted my first INSANE Killer Sudoku puzzle. Although it wasn’t “perfect” (it contains singleton cages), most probably this site wouldn’t become popular if it hadn’t been for that puzzle. It was by far the most difficult Killer Sudoku puzzle that the world had seen at that time […]
Posted in Free sample puzzles, Killer Sudoku | Also tagged , | 14 Responses
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