- Added solutions by Mark Anderson.
- Added solutions by Lubos Kolouch.
- Added solutions by Niels van Dijke.
- Added solutions by Humberto Massa.
- Added solutions by Conor Hoekstra.
- Added solutions by Laurent Rosenfeld.
- Added solutions by Luca Ferrari.
- Added solutions by David Ferrone.
- Added solutions by W. Luis Mochan.
- Added solutions by Thomas Kohler.
- Added solutions by Dave Jacoby.
- Added solutions by Packy Anderson.
- Added solutions by Athanasius.
- Added solutions by PokGoPun.
- Added solutions by E. Choroba.
- Added solutions by Steven Wilson.
- Added solutions by Peter Meszaros.
- Added solutions by Matthew Neleigh.
- Added solutions by Ali Moradi.
- Added solutions by Bob Lied.