Search found 21 matches

by Quadrata
Tue 23 Aug, 2022 4:22 pm
Forum: Puzzle Links
Topic: Quadrata: A Free Puzzle Blog
Replies: 20
Views: 17115

Re: Quadrata: A Free Puzzle Blog

Today is the ten-year anniversary of the first real puzzle I created. To celebrate, here is an anniversary puzzle that combines three of my early designs into one sudoku. Solution and more at: https://quadratablog.blogspot.com/2022/08/10th-anniversary-of-puzzle-creation.html https://blogger.googleus...
by Quadrata
Mon 11 Apr, 2022 5:01 pm
Forum: Puzzle Links
Topic: Quadrata: A Free Puzzle Blog
Replies: 20
Views: 17115

Re: Quadrata: A Free Puzzle Blog

One of my Knight's Sudoku was featured this month on the Wolfram Blog, so I decided to make a few new ones! Here they are. Solutions can be found at my blog here: https://quadratablog.blogspot.com/2022/04/wolfram-blog-and-quadratablog.html https://blogger.googleusercontent.com/img/a/AVvXsEjC9-W8QQ78...
by Quadrata
Thu 15 Jul, 2021 4:53 pm
Forum: Puzzle Links
Topic: Quadrata: A Free Puzzle Blog
Replies: 20
Views: 17115

Re: Quadrata: A Free Puzzle Blog

Here's a puzzle I just made on the graph GP(8,3). Enter 1 through 8 into the large circular cells so that each number appears twice. Adjacent cells must contain different numbers. The clues between cells reveal the sum of those two cells. Numberless clues indicate that the sum is larger than eight w...
by Quadrata
Wed 16 Jun, 2021 3:56 pm
Forum: Puzzle Links
Topic: Quadrata: A Free Puzzle Blog
Replies: 20
Views: 17115

Re: Quadrata: A Free Puzzle Blog

In this puzzle, each row and each column contains the numbers 1 through 6 exactly once, but NO cage is allowed to contain all distinct numbers! Clues when given must equal the sum of the entries in that cage. Solution and more info at: https://quadratablog.blogspot.com/2021/06/non-distinct-partition...
by Quadrata
Wed 19 May, 2021 3:30 pm
Forum: Puzzle Links
Topic: Quadrata: A Free Puzzle Blog
Replies: 20
Views: 17115

Re: Quadrata: A Free Puzzle Blog

Here's another calcudoku/KenKen style of puzzle but with a different twist. What if the entries in each cage are -forbidden- from being distinct? For example, a cage with three entries which add to 9 could be 4,4,1 but couldn't be 2,3,4, since those numbers are all different. Here are some small qui...
by Quadrata
Wed 05 May, 2021 4:07 pm
Forum: Puzzle Links
Topic: Quadrata: A Free Puzzle Blog
Replies: 20
Views: 17115

Re: Quadrata: A Free Puzzle Blog

Here are some small easy versions of a larger puzzle I like to make. Each row and column contains all the numbers 1 through 4, no cage contains duplicate numbers, and the numbers in a cage sum to a clue whenever a clue is given. The solution, more info, a PDF version, and many other larger puzzles c...
by Quadrata
Mon 19 Apr, 2021 4:25 pm
Forum: Puzzle Links
Topic: Quadrata: A Free Puzzle Blog
Replies: 20
Views: 17115

Re: Quadrata: A Free Puzzle Blog

New concept: Place 1 through 6 in the cells so each appears once in every row and column. The entries in each cage must be DISTINCT and sum to the clues when one is given. For more info and a solution visit: https://quadratablog.blogspot.com/2021/04/distinct-partition-puzzle.html https://1.bp.blogsp...
by Quadrata
Wed 31 Mar, 2021 10:46 pm
Forum: Puzzle Links
Topic: Quadrata: A Free Puzzle Blog
Replies: 20
Views: 17115

Re: Quadrata: A Free Puzzle Blog

Here's a new style of puzzle I made for Spring. Arrows point from larger numbers to smaller numbers. A dashed line means the numbers are not far apart (the difference is 1 or 2) and a solid line means the numbers are farther apart (the difference is 3 or 4.) Use each of the numbers 1 through 5 exact...
by Quadrata
Wed 17 Mar, 2021 5:42 pm
Forum: Puzzle Links
Topic: Quadrata: A Free Puzzle Blog
Replies: 20
Views: 17115

Re: Quadrata: A Free Puzzle Blog

The clues in this new style of puzzle depend on the number of primes in the two cells. A numeric clue indicates that exactly one of those numbers is prime and reveals the difference of the two numbers. A numberless clue indicates that either both or neither of those two entries are prime numbers. (R...
by Quadrata
Thu 25 Feb, 2021 5:48 pm
Forum: Puzzle Links
Topic: Quadrata: A Free Puzzle Blog
Replies: 20
Views: 17115

Re: Quadrata: A Free Puzzle Blog

Here's a 'word' puzzle I made where the clues represent the distance between letters in the alphabet. It's also a Sudoku in the sense that each symbol appears the same number of times in each row, column, and cage, even though the cages are now bendy and some symbols are repeated. Clues are given wh...
by Quadrata
Thu 11 Feb, 2021 6:50 pm
Forum: Puzzle Links
Topic: Quadrata: A Free Puzzle Blog
Replies: 20
Views: 17115

Re: Quadrata: A Free Puzzle Blog

With the success of the Queen’s Gambit, I’ve been getting requests for chess puzzles. I figured it was time to post a Queen’s Sudoku. Each row, column, and three-by-three cage must contain exactly three Queens. Some Queens are given, and the clues attached reveal the number of other pieces they can ...
by Quadrata
Wed 23 Dec, 2020 8:49 pm
Forum: Puzzle Links
Topic: Quadrata: A Free Puzzle Blog
Replies: 20
Views: 17115

Re: Quadrata: A Free Puzzle Blog

I just made a snowflake puzzle for the holiday this year. Consecutive numbers are numbers which are one apart such as 1 and 2, or 4 and 5. A lettered dot between diamonds means the numbers in those diamonds are consecutive, and a blank dot means they are not. In addition, the letter is ‘L’ for low i...
by Quadrata
Wed 09 Dec, 2020 5:58 pm
Forum: Puzzle Links
Topic: Quadrata: A Free Puzzle Blog
Replies: 20
Views: 17115

Re: Quadrata: A Free Puzzle Blog

Another new concept: Dots between cells indicate consecutive numbers, and the colors indicate the size. Dots are also placed whenever possible between cells of the same cage, so lack of a dot means something! Solution, PDFs, black and white version and lots more information at: https://quadratablog....
by Quadrata
Wed 25 Nov, 2020 5:21 pm
Forum: Puzzle Links
Topic: Quadrata: A Free Puzzle Blog
Replies: 20
Views: 17115

Re: Quadrata: A Free Puzzle Blog

Here's a larger version of my last puzzle, now in full 9x9 glory! If you’re new to prime numbers you only need to know that the first seven primes are 2, 3, 5, 7, 11, 13, and 17 to try it. The numbers in this puzzle reveal the sum of the entries in adjacent cells only when exactly one of those numbe...
by Quadrata
Thu 12 Nov, 2020 3:45 pm
Forum: Puzzle Links
Topic: Quadrata: A Free Puzzle Blog
Replies: 20
Views: 17115

Re: Quadrata: A Free Puzzle Blog

This next puzzle is a little mathy in the sense that it uses the primes, but really all you need to know is that the first three prime numbers are 2, 3, and 5. Basically, if you see a number between cells then exactly one of those cells contains a prime, and that number tells you the sum. A diamond ...
by Quadrata
Wed 28 Oct, 2020 10:00 pm
Forum: Puzzle Links
Topic: Quadrata: A Free Puzzle Blog
Replies: 20
Views: 17115

Re: Quadrata: A Free Puzzle Blog

Here's a puzzle I designed for a math conference that took place last weekend. You don't need to know much more than which numbers divide 2020 to attempt it, so I figured I would share it here as well. For more details and a solution visit my blog here: https://quadratablog.blogspot.com/2020/10/2020...
by Quadrata
Wed 07 Oct, 2020 4:26 pm
Forum: Puzzle Links
Topic: Quadrata: A Free Puzzle Blog
Replies: 20
Views: 17115

Re: Quadrata: A Free Puzzle Blog

Here's a Sudoku with clues based around the products of numbers in adjacent cells. Even products are fully revealed but odd products result in a numberless dot. Solution and more at: https://quadratablog.blogspot.com/2020/10/even-product-sudoku.html https://1.bp.blogspot.com/-_GzX3rayeak/X33ni8yOTLI...
by Quadrata
Wed 23 Sep, 2020 3:38 pm
Forum: Puzzle Links
Topic: Quadrata: A Free Puzzle Blog
Replies: 20
Views: 17115

Re: Quadrata: A Free Puzzle Blog

Here are some smaller 6x6 versions of my last puzzle, the even sum Sudoku. They start easy and get harder as they go. Rules are on the puzzle and the solution and PDF can be found at my blog here: https://quadratablog.blogspot.com/2020/09/even-sums-rokudoku.html https://1.bp.blogspot.com/-BqO288ZpOh...
by Quadrata
Thu 10 Sep, 2020 3:57 pm
Forum: Puzzle Links
Topic: Quadrata: A Free Puzzle Blog
Replies: 20
Views: 17115

Re: Quadrata: A Free Puzzle Blog

Here's a 9x9 Sudoku where the clues tell you what the sum is of the two adjacent cells. The catch is that the numbers are only given when they are even. Thus a numberless dot reveals that the sum is odd without telling you what that sum is. https://1.bp.blogspot.com/-UBG-tGsv9YU/X1bhOB088aI/AAAAAAAA...
by Quadrata
Wed 26 Aug, 2020 4:08 pm
Forum: Puzzle Links
Topic: Quadrata: A Free Puzzle Blog
Replies: 20
Views: 17115

Re: Quadrata: A Free Puzzle Blog

Here are some small puzzles based around divisibility, with arrows revealing which number divides which. Dots indicate that neither divides the other. The first puzzle is solved to give you a visual instruction. The next three puzzles increase with difficulty as they go. For solutions, PDFs, other v...
by Quadrata
Wed 12 Aug, 2020 6:27 pm
Forum: Puzzle Links
Topic: Quadrata: A Free Puzzle Blog
Replies: 20
Views: 17115

Quadrata: A Free Puzzle Blog

Just wanted to let everyone here know about a puzzle website that I maintain. I post new original puzzle varieties there about twice a month. Today I posted three Sudoku variants where the clues are the greatest common divisors of the numbers in adjacent cells. This puzzle is below, and the solution...