# Algo Sniffer 4.4

 Author dllu Submission date 2011-05-22 00:30:15.486028 Rating 4251 Matches played 7327 Win rate 40.17

Use rpsrunner.py to play unranked matches on your computer.

## Source code:

``````import random
#guesses the algorithm that the opponent is using
#should always beat:
#play last input
#beat last input
#always play rock
#skynet2
#algo sniffer 3.2, 3.3, 3.4, 3.4v, 3.4vv, 4
if not input:
nummoves = 0
urmoves = ['R','P','S']
mode = 0
lastoutput = 0
loserness = 0

if nummoves<3: #for the first 3 moves, play R, P, something
if nummoves==0:
lastoutput = output = 'R'
elif nummoves==1:
lastoutput = output = 'P'
urmoves[0]=input;
elif nummoves==2:
lastoutput = output = 'R'
urmoves[1]=input;
else:
if mode==0:
urmoves[2] = input
if urmoves == ['P','R','P']: #you are play last input
mode=1
elif urmoves == ['P','P','S'] or urmoves == ['R','P','S']: #you are beat last input
mode=2
elif urmoves == ['R','R','R']: #you are always play rock
mode=3
elif urmoves == ['S','S','R']: #you are skynet2
mode=4
else: #I don't know who you are but I'll always beat your last input
mode=-1

if mode==1:
lastoutput = output = {'R':'P', 'P':'S', 'S':'R'}[lastoutput]
elif mode==2:
lastoutput = output = {'R':'S', 'P':'R', 'S':'P'}[lastoutput]
elif mode==3:
lastoutput = output = 'P'
elif mode==4:
lastoutput = output = {'R':'R', 'P':'P', 'S':'S'}[lastoutput]
elif mode==5:
lastoutput = output = random.choice(["R", "P", "S"])
else:
lastoutput = output = {'R':'P', 'P':'S', 'S':'R'}[input]
if nummoves>10 and nummoves<110 and mode!=5: #if we are losing most of the time, just go random
if input == {'R':'P', 'P':'S', 'S':'R'}[lastoutput]:
loserness+=1;
if loserness > 53:
mode = 5;

nummoves += 1``````