Richard moves to N and attacks the centipede in N4:
Attack - (1d20+3)[22]
Damage - (1d6+3)[5]
Confirmation - (1d20+3)[19]
Crit Damage - (1d6+3)[8]
Trip Check - (1d20+2)[19]
Bruce moves to G6 and attacks the centipede in I4, unless it has been killed, in which case he attacks the one in J4.
Attack - (1d20-1)[5]
Confirmation - (1d20-1)[10]
End turn.