15 October 2014

Appreciation

Title: Appreciation
Rating: 2/5



In the continued vein of how things get named, I'm hoping you'll be able to cheer about the name for this one.  There are a few areas to be careful of, though.  Make sure to check out the rules below.

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.
  • Cells at the following positions belong to the regions that go horizontally and vertically through that cell: (2,2), (2,8), (8,2), (8,8), (4,4), (4,6), (6,4), (6,6).  The (light purple) color of these cells is the RGB-average of the colors from the horizontal and vertical regions that intersect there. 
  • Remember: numbers can repeat within a shaded region if that doesn't violate the first rule.

08 October 2014

Bronx

Title: Bronx
Rating: 3/5 


Typically made with gin, sweet red vermouth, dry vermouth, and orange juice, the Bronx has unclear origins dating before Prohibition. 

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.

01 October 2014

Prorus

Title: Prorus
Rating: 3/5

Not your typical product puzzle this week.  The board is what I call a "toral board," so named because the board is meant to be viewed not as a big square, but as what's called a fundamental region.  In this case, imagine folding the sides of the square together to get a cylinder.  Then fold the ends of the cylinder together, and you get what's called a torus (a donut, if you will).  Those associations (between left and right, between top and bottom, and, hence, between all corners) are reflected in the rules below.

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.

24 September 2014

A Four Color Problem

Title: A Four Color Problem (original)
Rating: 4/5





On the last sum puzzle, I had no inspiration for the title.  This week's puzzle is the first sum puzzle I created.  The second was published in MAA Focus; so consider this a two-for-one week.

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.

17 September 2014

Papa Doble

Title: Papa Doble
Rating: 2/5 

Mix rating 2
Also known as the Hemingway Daiquiri, this is made with white rum, the juice of limes and grapefruit, and some maraschino liqueur. 

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.

10 September 2014

Churn

Title: Churn
Rating: 2/5

product rating 2
Only a little bit of agitation in this product puzzle, unlike the last one.

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.

03 September 2014

Pending

Title: Pending
Rating: 3/5

sum rating 3




Sometimes the puzzle just doesn't come out looking like anything to me.  As one of the few times that's happened, this sum puzzle got an generic title.

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.