# Algo Sniffer 4

 Author dllu Submission date 2011-05-21 22:52:39.233978 Rating 4747 Matches played 7689 Win rate 40.6

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

## Source code:

import random
#hopefully fixes a stupid bug in Algo Sniffer 3.2, 3.1 and 3
#guesses the algorithm that the opponent is using
#should always beat play last input, beat last input, always play rock, and skynet2
if not input:
nummoves = 0
urmoves = ['R','P','S']
mode = 0
lastoutput = 0

if nummoves<3: #for the first 3 moves, play R, P, S.
if nummoves==0:
lastoutput = output = 'R'
elif nummoves==1:
lastoutput = output = 'P'
urmoves[0]=input;
elif nummoves==2:
lastoutput = output = 'S'
urmoves[1]=input;
nummoves += 1
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=5
#print "urmoves:"
#print urmoves
#print "mode:"
#print mode

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]
else:
lastoutput = output = {'R':'P', 'P':'S', 'S':'R'}[input]

#print "ur"
#print input
#print "my"
#print output