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Craig's M/L/O Puzzle Page
(M/L/O = Math/Logic/Observation)
(Fancy logo pending)

Hello!  Welcome to my second Puzzle page.  My first page, containing my "newswire" where I intermittently post puzzle-related news I come across is currently at  On the other hand, this page will contain assorted useful and/or useless information related to non-language, non-trivia dependent puzzles, with an emphasis on the doings of the World Puzzle Federation (including the World Puzzle Championships), and the types of puzzles used there.  It will also contain puzzles I have created for the WPC's or for my own personal enjoyment, though never very many at once.  I am fortunate enough to be able to sell some of my puzzles, so it's not in my best interest to give away them away by the wheelbarrowful.

If you like the puzzles and musings here, you are encouraged to do one of the following things:
  • Drop me a line.  I can be reached care of:
  • Hire me.  I can construct pretty much any kind of puzzle, for pretty much any kind of solving audience.  In particular, I would enjoy doing some work with Japanese logic puzzle publishers - I like their willingness to innovate and invent new puzzle variations - but that's not nearly the only type of work I'd take.
  • Host me.  To be more precise, host my site.  (This is only important if you mind the ads my free hosting provider inserts into these pages.)
On the other hand, if for some reason you don't like a puzzle or puzzles, let me know, but please tell me why you feel that way.  (In other words, constructive criticism is always welcome.)

Enjoy the puzzles - and watch out for the occasional surprise!

Craig Kasper
Puzzles, for your solving pleasure
April 1, 2003 - It all adds up...
1. Divide the square below into pieces of the same shape and equal area so that the numbers in each piece add up to the same sum.

2.  Replace each letter in the cryptarithm below to make the addition correct.

My next update will be to catch up on answers to previous puzzles.

March 20, 2003 - Better late than never!

1.  My belated Valentine's Day puzzle:  Place the digits 0 through 9 in the diagram below so that no digit is horizontally or vertically adjacent to any other digit more than once.  

2.  My belated St. Patrick's Day puzzle:  
     A.Using any desired quantity of exactly 1 of the pieces below, create an infinitely repeating pattern.  (Or for you mathophiles out there, "tile the plane".)  
     B.Using any desired quantity of exactly 2 of the pieces below, create an infinitely repeating pattern.  
     C.Using any desired quantity of 3 or more of the pieces below, create an infinitely repeating pattern.   

March 10, 2003 - Miscellaneous
I've been busy lately - creating crosswords (and selling them) among other things.  Here is an update to tide me over until I make a proper update.

1.  See if you can figure out this Battleships variation (10x10 grid) with just the following:  EQUALED,  WRAPPER, LACEWINGS, SACKCLOTH, SELFAWARE, ACCORDIONS, FLEAMARKET, LINEBACKER, RURITANIAN, THUMBPRINT.  
Updated:  These are the rules for this Battleships variation:  The words read across and down in the completed grid, one letter per square, with no other restriction (except that where words cross, the squares must contain the same letter).  The B's represent the battleship (4 squares long); the D's the destroyer (3 squares); the C's the cruisers (2 squares), and the S's the submarine (1 square).  The normal rule applies: ships cannot be placed in horizontally, vertically, or diagonally adjacent squares.

2.  What number comes next in this series: ONE, TWO, THREE, TWENTY-FOUR, TWENTY-TWO, _______?

3.  What is the next item in this series:  TALK, SEMI, RING, _____ ?

Answers will be given in an April update.
January 3, 2003 - Happy New Year!
     To complete these puzzles, enter the digits 0 through 4 so that the digits 1, 2, 3, and 4 appear exactly once in each row and column, and the digit 0 appears twice in each row and column. The solutions are unique.  (Error in the middle puzzle corrected Feb. 8, 2003.

December 3, 2002 - Trim the Tree

[Sorry, this puzzle requires a graphical browser to view the tree] Christmas is coming... it's time to trim the tree.

A.  Divide the tree into 8 different pentominoes plus the ornament.  (Pentominoes are shapes that formed by joining 5 squares together along the edges of the squares.  Here, "different" means that each pentomino should be a different shape than the other 7.)   (Answer)

B.  Divide the tree into the ornament plus non-symmetrical pieces which are all of the same size and shape.  How many pieces are required? (Answer)

C.  This one has three parts:
  1. Divide the tree into 5 rotationally symmetric pieces, two squares or larger in size.  (Answer)
  2. As above, only this time, without the square containing the ornament.  (Answer)
  3. If you move the ornament to another square, can you divide the tree into 4 rotationally symmetric pieces plus the ornament?  (Answer)
D.  Starting at the square with the Christmas ornament, and moving like a knight does in chess, visit every square exactly once.  (Answer)

Some of these puzzles may have more than one valid answer in addition to the ones provided.

About the constructor:

Craig Kasper is a Canadian puzzle constructor in his early 30's.  He has a degree in computer science (and accordingly currently works in the IT field).  He has been fascinated with puzzles of various kinds since he was in elementary school, and is capable of constructing and solving puzzles at a high level including crosswords (both US-style and cryptic), wordplay and language-based puzzles, math-based puzzles and logic puzzles.

Craig was a constructor for the World Puzzle Championships in 2000 and 2002, and supplied puzzles for the 2001 and 2002 US Team qualifying tests.  He hopes to someday represent Canada as a competitor.

In March of 2002 Craig was able to attend the American Crossword Puzzle Tournament in Stamford, Connecticut, where he placed 1st in the foreign division, 3rd in the Rookies classifiaction, and 55th overall out of over 400 participants.

Craig's other interests include playing games, reading (mystery novels in particular), recreation sports, walking, and socializing.

A stylized graphic representation of him may be reconstructed from the following PBN signature:
Except as noted, puzzles and articles presented on this page are the copyrighted intellectual property of Craig Kasper.
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