- Added solutions by Bob Lied.
- Added solutions by Mariano Spadaccini.
- Added solutions by Peter Campbell Smith.
- Added solutions by Luca Ferrari.
- Added solutions by W. Luis Mochan.
- Added solutions by Carlos Oliveira.
- Added solutions by Dave Jacoby.
- Added solutions by E. Choroba.
- Added solutions by David Ferrone.
- Added solutions by Roger Bell_West.
- Added solutions by Simon Green.
- Added solutions by Thomas Kohler.
- Added solutions by Arpad Toth.
- Added solutions by Robbie Hatley.
- Added solutions by Jorg Sommrey.
- Added solutions by PokGoPun.
- Added solutions by Pip Stuart.
- Added solutions by Ali Moradi.
- Added solutions by Robert Ransbottom.
- Added solutions by Ulrich Rieke.
- Added solutions by Robert DiCicco.
- Added solutions by Cheok-Yin Fung.