Kakuro or Kakkuro (Japanese: カックロ) is a kind of logic puzzle that is often referred to as a mathematical transliteration of the crossword. Kakuro puzzles are regular features in many math-and-logic puzzle publications in the United States. In 1966, Canadian Jacob E. Funk, an employee of Dell Magazines, came up with the original English name Cross Sums and other names such as Cross Addition have also been used, but the Japanese name Kakuro, abbreviation of Japanese kasan kurosu (加算クロス, addition cross), seems to have gained general acceptance and the puzzles appear to be titled this way now in most...

Year 859 (DCCCLIX) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. == Events == === By place === ==== Europe ==== January 15 – Battle of Saint-Quentin: Frankish forces led by Humfrid defeat king Louis the German at Saint-Quentin (Northern France). Humfrid is enfeoffed with the County of Autun and appointed Margrave of Burgundy by king Charles the Bald. Summer – The Viking chieftains Hastein and Björn Ironside (a son of Ragnar Lodbrok) begin an expedition and sail from the Loire River with a fleet of 62 ships to raid cities and monaste...