27 May 2015

Zero Sum

Title: Zero Sum
Rating: 3/5



In the first of three consecutive alternate puzzles, here's a sum puzzle with one small tweak.  Check out the new first rule.

The official rules:

  • The digits 0 through 8 appear in each row and each column exactly once.
  • Digits in each shaded region must add to the indicated sum.   
  • Squares with multiple colors contain a number that’s used in the sum for adjacent regions of each of those colors.
  • Remember: numbers can repeat within a shaded region if that doesn't violate the first rule.

20 May 2015

Monkey Gland

Title: Monkey Gland
Rating: 2/5 

Mainly a mixture of gin and orange juice, this 1920s drink also contains drops of absinthe and grenadine.

The official rules:

  • The digits 1 through 9 appear in each row and each column exactly once.
  • Digits in each shaded region must add to the indicated sum (denoted by +) or multiply to the indicated product (denoted by *).   
  • Squares with multiple colors contain a number that’s used in the sum/product for adjacent regions of each of those colors.  
  • Remember: numbers can repeat within a shaded region if that repetition doesn't violate the first rule.

13 May 2015

Circuitry

Title: Circuitry
Rating: 3/5
Back in October, I posted the first puzzle that had a "toral board." The additional rule is highlighted at the bottom, but it relies on the mathematical idea of a fundamental region.  I haven't consider any other fundamental regions as puzzle boards yet.

The official rules:

  • The digits 1 through 9 appear in each row and each column exactly once.
  • Digits in each shaded region must multiply to the indicated product.   
  • Squares with multiple colors contain a number that’s used in the product for adjacent regions of each of those colors.  
  • Remember: numbers can repeat within a shaded region if that doesn't violate the first rule. 
  • The board is a “toral board,” that is, cells at the end of one row are considered adjacent to those at the beginning of the same row; cells at the end of one column are considered adjacent to those at the beginning of the same column, and all corner cells are considered adjacent.

06 May 2015

Castle Wall

Title: Castle Wall
Rating: 3/5



It could be that I watched one too many Middle Earth movies around the naming of this one, but for whatever reason the shapes reminded me of ramparts.

The official rules:

  • The digits 1 through 9 appear in each row and each column exactly once.
  • Digits in each shaded region must add to the indicated sum.   
  • Squares with multiple colors contain a number that’s used in the sum for adjacent regions of each of those colors.
  • Remember: numbers can repeat within a shaded region if that doesn't violate the first rule.

29 April 2015

Planter's Punch

Title: Planter's Punch
Rating: 4/5 

Among the ingredients in this drink that are three of the main colors of the puzzle are the dark rum, Grenadine syrup, and lemon juice.  The drink is meant to be served on the rocks, which accounts for the final color.

The official rules:

  • The digits 1 through 9 appear in each row and each column exactly once.
  • Digits in each shaded region must add to the indicated sum (denoted by +) or multiply to the indicated product (denoted by *).   
  • Squares with multiple colors contain a number that’s used in the sum/product for adjacent regions of each of those colors.  
  • Remember: numbers can repeat within a shaded region if that repetition doesn't violate the first rule.

22 April 2015

Contour Map

Title: Contour Map
Rating: 2/5


This product puzzle reminded me of what are called level sets in a multivariable Calculus class.  If you haven't taken such a course, you might think of the regions as those in a topography map.

The official rules:

  • The digits 1 through 9 appear in each row and each column exactly once.
  • Digits in each shaded region must multiply to the indicated product.   
  • Squares with multiple colors contain a number that’s used in the product for adjacent regions of each of those colors.  
  • Remember: numbers can repeat within a shaded region if that doesn't violate the first rule. 

15 April 2015

Six is Afraid

Title: Six is Afraid
Rating: 1/5



And why, you might ask, is six afraid of seven?  The puzzle contains the answer several times.

The official rules:

  • The digits 1 through 9 appear in each row and each column exactly once.
  • Digits in each shaded region must add to the indicated sum.   
  • Squares with multiple colors contain a number that’s used in the sum for adjacent regions of each of those colors.
  • Remember: numbers can repeat within a shaded region if that doesn't violate the first rule.