04 May 2016

Modernista

Title: Modernista
Rating: 3/5 

The final modular puzzle is named after a drink made from gin, dark rum, lemon juice, absinthe, orange bitters, and a maraschino cherry. 


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 *)--both mod 9.   
  • 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.

27 April 2016

Elasticity

Title: Elasticity
Rating: 3/5


After last week's mod 9 sum, this week is a mod 9 product.

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 (mod 9).   
  • 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.  

20 April 2016

Modular Lightning

Title: Modular Lightning
Rating: 2/5



In the first of three puzzles of this type, modular arithmetic plays an important rule.  Here, all the sums are given mod 9.

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 (mod 9).   
  • 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. 

13 April 2016

Missouri Mule

Title: Missouri Mule
Rating: 2/5 

The titular drink is destined to provide a kick.  Created by Harry Truman, it's a combination of bourbon, Applejack, lemon juice, Campari, and Cointreau


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.

06 April 2016

Discontinuity

Title: Discontinuity
Rating: 1/5


The title comes from the overlapping regions in the center square.  Note that the number in the center is part of both the horizontal and the vertical regions through that square.

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.  

30 March 2016

Cocktail Ring

Title: Cocktail Ring
Rating: 3/5 

This puzzle is so named because of the extra rule (see the end of the list) that adds to the challenge: it's a toral board puzzle (like Prorus, Circuitry, Fundamentals, and Toral Rorschach)


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.
  • 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.