Magic Summer
Rules[edit]
Place in the grid digits from 1 to N so that each row and column contains each digit exactly once. Numbers outside the grid show the total of all numbers appearing in corresponding rows and columns. These numbers are separated by at least one empty cell.
(Rules and example (N=5) from the 11th 24hPC IB[1])
History of the puzzle[edit]
Invented by Vladimir Portuglaov (Belarus). First appeared on forsmarts Puzzle Book 4 (2007)[2].
Appearances in the past WPCs[edit]
- WPC 2015/Round 9 by Vladimir Portugalov
- WPC 2014/Round 1