The guards stack up against Sofia and Kismet, two guards each, to overbear and force them back into the courtyard.
The fighter in 0511 gains +3 for overbearing and rolls a modified 21, shoving Sofia back into 0513. This counts as the front fighter's move and attack, costing him 3 AP. The attack causes no damage (he rolls a 1-3=0).
The fighter in 0509 (the leader who was the "big talker" the party hit earlier) steps into 0511 (2 AP), lends his weight to overbearing Sofia (1 AP) then attacks Enrico.
[It is arguable that his helping push Sofia should count as an attack, but I don't think this follows. A military unit's formation must be able to push against an enemy and allow both lines to attack; this would mean the back line must be able to contribute both the force of weight AND an attack]
The leader rolls an 8 against Enrico, missing.
We then repeat this against Kismet. Overbearing, 0411 rolls a 2 and Kismet holds his ground.
This forces the guard behind 0411, who advances into 0411 to help push, to expend his 4th AP to retreat again into 0410. There he stays. Are you fellows following this? Trying to make it as clear as I can.
This leaves 0413 empty. The guard that pushed Sofia has 2 AP left, so he moves into 0413.
Finally, the guard that starts in 0508 can advance to 0509, 0510 and 0511, then use his last 2 AP to get into 0512. That's the end of his move.
The rest of the guards then pile into the alley. The map is cut off at the point the players can reasonably view.
Before taking action, I need to explain that Sofia can feel a distinct vibration in the stones under her feet in 0513. Something seems to be happening underfoot. The other characters cannot feel anything, but the horse seems nervous.
The players can act.
Following their action, the situation appears like this (note the rats):