[sdz]

Then you'd want to set maxslots to 14 and change the mode in reservedslots.

sm_reserved_slots = 2
sv_visiblemaxplayers = 12
sm_hide_slots = 1
sm_reserve_type = 0

If that doesn't work and you're really trying to start fires, best I could offer you in terms of advice is to fiddle around with the code working in conjunctions to sm_reserve_maxadmins