15 votes

Wanted: Sudoku data in CSV

From the SO answer to the essentially same question (test cases for Sudoku solver): You can find some large datasets for Sudoku benchmarking and testing in this project: https://github.com/t-dillon/...
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  • 10.6k
10 votes

How do you decrypt a keyword transposition cipher without keyword?

NOTE: This is a guide to solving polyalphabetic cryptograms as it says in the question, and not transposition ciphers like it says in the title This is called cryptanalysis. Defined as 'the art ...
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8 votes
Accepted

Seeking lists of words formed from an existing word

You can use Qat with a query like AB;A.B;|A|=0-;|AB|=7 Explanation: A and B are by default non-empty strings. AB The ...
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  • 14.5k
6 votes
Accepted

Origin of the "Ages of Three Children" puzzle (Census-taker problem)

After doing a lot of (possibly not quite legal) digging, I think I've found the rough birth of the problem. The problem seems to have evolved in around 1940, from the M.I.T campus during World War II. ...
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6 votes

Where can I get free words list for my word games?

Take a look at words. It's a list of English words. Free to use, even for commercial purposes. The license can be found here. It begins: The collective work is ...
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4 votes

CiSRA Puzzle Hunt Backups?

Mezzacotta (the successor to CiSRA) posted the 2007-2013 CiSRA puzzles on their site a couple days ago: https://www.mezzacotta.net/puzzle/cisra/
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  • 141
4 votes

Seeking a list of words formed from existing words

In Qat this is A;B;AB: A is a string of letters which must be a word B is a string of ...
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  • 9,085
4 votes

How many unique "miracle sudokus" are there?

An un-enlightening brute force computer search yielded the following 5 solutions, excluding rotation, reflection, and inversion. Inspecting these solutions, it turns out that 1 and 9 are never ...
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  • 191
3 votes
Accepted

Good resource for daily Sudoku Puzzles

Web Sudoku has huge amounts of puzzles across five difficulty levels. You don't even have to wait a day for new ones.
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  • 555
3 votes
Accepted

CiSRA Puzzle Hunt Backups?

The Wayback Machine seems to work for other years -- here's the link to 2012, for instance. The site (including the archive of puzzles) seems to be completely usable to me through the Wayback Machine.
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  • 136k
2 votes
Accepted

References - In what order should I start reading the books by Raymond Smullyan?

I suggest By date published because that's the order he wrote them in, which makes the most sense to read them in, like a trilogy. His mind would develop new ideas with each book, and they are ...
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  • 35.4k
2 votes

Good resource for daily Sudoku Puzzles

In case you are looking for printable Sudoku puzzles and variations you can checkout www.FunWithPuzzles.com Sudoku Variations page is as given below http://www.funwithpuzzles.com/2017/02/sudoku-...
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2 votes
Accepted

any tools/sites/algorithms to decipher garbled text based on improper hand position on a keyboard?

Dcode has an engine for cracking "Keyboard shift" ciphers, which is a systematic shift of all intended letters along a particular keyboard layout. You can specify both language and keyboard ...
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  • 585
1 vote

How to arrange the colored cells in game grid?

You can solve the problem via mixed integer linear programming as follows. Let $I$ be the set of rows, $J$ the set of columns, and $C$ the set of colors. For $c\in C$, let $J_c \subseteq J$ be the ...
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  • 7,384
1 vote

Listing of New York Times celebrity crosswords?

The search function on the NYTimes site helped with this, I couldn't find a full list only the short ones on the wiki page. (Same goes for other sites, they just cherry-pick the ones they like). ...
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1 vote

Where can I find diagramless fill-in puzzles?

Believe it or not, there are two books of Diagramless Fill-Ins (I have both of them myself) that exist. You can purchase both of them on Amazon. https://www.amazon.com/Diagramless-Fill-Ins-I-Richard-...
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  • 11
1 vote

Where can I find diagramless fill-in puzzles?

Some Penny Press puzzle variety books have one or two of the diagramless fill-in puzzles. I also like them and have a hard time finding them. For the Penny Press puzzles, they have a list of words ...
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  • 11

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