House rules:
the order of the party is 2 in front, 2 in the middle, 2 in the back
In passages and also in rooms type A only the 2 characers in the front fight against 2 monsters.
When entering a room, in the first round of combat only the 2 front characters and 2 mosnters fight. In second round of combat and subsequent ones all characters and monsters can fight.
If you get monsters in a passage roll 1d6. On a 6 the monsters surprise you from the back so only the 2 heroes on the back fight.