## Thursday, March 26, 2015

Black and White Killer Sudoku appeared in Sudoku Surprise test which was held in November 2014 on Logic Masters India website. Author of this test is David McNeill. With this post I want to thank David McNeill for this wonderful set of puzzles for Sudoku Surprise Test.
Today's Black and White Killer Sudoku is slightly different from the one which appeared in Sudoku Surprise test. In the original Sudoku full grid was sub-divided into cages. However in the present Sudoku there are some cells which are not part of cages. I have updated instruction of the puzzle, so that this change is clear.
This Black and White Killer Sudoku is my 102nd contribution for The League of Extraordinary Ladies and Gentlemen
Rules of Black and White Killer Sudoku
Fill numbers from 1-7 so that each row, column and 3×3 box contains the digits 1-7, a black circle and a white circle. In addition, some parts of the grid is sub-divided into cages. Each cage contains exactly one circle and some digits. All cages with a black circle must have the same digit sum. Similarly, all cages with a white circle must have the same digit sum. The respective digit sums may or may not be different. Digits cannot repeat within a cage.
 Black and White Killer Sudoku (Daily Sudoku League #102)

Puzzle: Disparity Sudoku

Solution of
 Classic Sudoku (Mini Sudoku Series #29) Solution