Checksum

  • strict warning: Only variables should be assigned by reference in /mnt/web118/d3/21/540721/htdocs/sachsentext/sites/all/modules/links/links_related.module on line 197.
  • strict warning: Only variables should be assigned by reference in /mnt/web118/d3/21/540721/htdocs/sachsentext/sites/all/modules/links/links_related.module on line 433.
  • strict warning: Only variables should be assigned by reference in /mnt/web118/d3/21/540721/htdocs/sachsentext/sites/all/modules/links/links.inc on line 1450.
  • strict warning: Only variables should be assigned by reference in /mnt/web118/d3/21/540721/htdocs/sachsentext/sites/all/modules/links/links.inc on line 1450.

Place numbers 1 to 4, each once, in only white cells of each row and column. Numbers in gray cells are sum of orthogonally adjazent white cells.

Puzzle:

Checksum