- Added solutions by James Smith.
- Added solutions by Feng Chang.
- Added solutions by Luca Ferrari.
- Added solutions by Bob Lied.
- Added solutions by Thomas Kohler.
- Added solutions by Vamsi Meenavilli.
- Added solutions by W. Luis Mochan.
- Added solutions by Dave Jacoby.
- Added solutions by Lubos Kolouch.
- Added solutions by Niels van Dijke.
- Added solutions by Flavio Poletti.
- Added solutions by Peter Campbell Smith.
- Added solutions by Roger Bell_West.
- Added solutions by Paulo Custodio.
- Added solutions by Robbie Hatley.
- Added solutions by Jorg Sommrey.
- Added solutions by David Ferrone.
- Added solutions by Mariano Spadiccini.
- Added solutions by Arne Sommer.
- Added solutions by E. Choroba.
- Added solutions by Carlos Oliveira.
- Added solutions by Pip Stuart.
- Added solutions by Matthew Neleigh.
- Added solutions by Laurent Rosenfeld.
- Added solutions by Robert DiCicco.
- Added solutions by Ulrich Rieke.