crwdns2934241:0crwdne2934241:0 E W

crwdns2934249:0crwdne2934249:0:

The irony is that downward pressure on the back of the tile increases the force of friction between the front and back making opening the tile harder.  The key to success of any of the suggested approaches is to get some sort of grip on the tile faces without exerting too much force pressing them together.

crwdns2915684:0crwdne2915684:0:

open