not the "Boulder Dash" your looking for? try Dodgerock
'Boulder Dash' was the first part of 'Uphill Garden' from the first episode of Takeshi's Castle.
The contestant has to get straight across a hill to the other side to be able to continue on with the game. If they slip down to the bottom of the hill they lose and are out.
To make things difficult, the hill is really muddy so it's very hard to keep your footing and not slide down. The guards also add a further obstacle by throwing rocks and logs down the hill to try and knock the contestants off their feet.