The "everybody are welcome" contest

Problems

Name Solved / Tries Average tries Average tries to solve
A Tomography 0/0 (0%) -- --
B Association for Computing Machinery 0/0 (0%) -- --
C Troll Hunt 0/0 (0%) -- --
D Moving Pianos 0/0 (0%) -- --
E The King of the North 0/0 (0%) -- --