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		A Ray is part of a line from a starting square in one particular direction. Lines are either the orthogonal ranks and files or the diagonal lines, diagonals and anti-diagonals. The length of a ray varies from zero until seven squares.
The Enlightenment [1]

Ray Directions

Following Compass rose gives the directions and single step increments of an 8x8 Board:

  northwest    north   northeast
  noWe         nort         noEa
          +7    +8    +9
              \  |  /
  west    -1 <-  0 -> +1    east
              /  |  \
          -9    -8    -7
  soWe         sout         soEa
  southwest    south   southeast

See also

• Anti-Diagonals
• Diagonals
• Direction
• Files
• Intersection Squares
• Ranks
• Sliding Piece Attacks
  On an empty Board
  • Negative Rays
  • Positive Rays
• Vector Attacks
• X-ray
• X-ray Attacks (Bitboards)

Forum Posts

• Extract direction (ray) informations from two squares by Mathieu Pagé, CCC, June 18, 2013 » Direction, Square Attacked By
• Table-less bitboards (bitrays?) by Harm Geert Muller, CCC, June 18, 2013 » Board Representation

External Links

• Ray from Wikipedia
• Stingray from Wikipedia
• Michael Brecker Band - Original Rays, Wiesen, Austria, July 9, 1989, YouTube Video
  Michael Brecker, Mike Stern, Joey Calderazzo, Jeff Andrews, Adam Nussbaum
  

References

1. ^ Photo by Gerd Isenberg, September 18, 2016, detail of the Flottmann gate, Art Nouveau theme of Dragon and Sun designed by Carl Weinhold, art director of blacksmith and foundry Füssmann und Fleeth, Essen, exposed at the industrial and trade exhibition 1902 in Düsseldorf, and baught by Heinrich Flottmann as gate for his jackhammer factory, today adjacent to the exhibition and event space Flottmann-Hallen in Herne, North Rhine-Westphalia, Germany, and part of The Industrial Heritage Trail of the Ruhr area, "In the upper center of the gate is a symbol of The Enlightenment, a female head with a ray ring." from Flottmann-Tor – Hün un Perdün, see also Image from the archive of the city of Herne, and Flottmann-Hallen - Historie (German)

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