NNfix_4_0.9_0.2

 Author tk2 Submission date 2013-06-23 15:36:58.506685 Rating 6852 Matches played 642 Win rate 70.4

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

Source code:

``````import random
import math

def ans(hand, i):
return 1.0 if hand == i else 0.0

def value(j, k):
return +2.0 if history[j][k // 3] == k % 3 else -1.0

def action():
for i in range(3):
pred[i] = -thr[i]
for j in range(size):
if history[j][1] == -1:
break
for k in range(6):
pred[i] += weight[i][j][k] * value(j, k)
pred[i] = 1.0 / (1.0 + math.exp(-pred[i]))
g = max(0.0, pred[1] - pred[2])
c = g + max(0.0, pred[2] - pred[0])
p = c + max(0.0, pred[0] - pred[1])
if p == 0.0:
return random.choice(['R', 'P', 'S'])
r = p * random.random()
if r < g:
return 'R'
elif r < c:
return 'S'
else:
return 'P'

def result(mine, others):
p = 0.0
q = 0.0
for i in range(3):
r = ans(others, i) - pred[i]
s = r * pred[i] * (1.0 - pred[i])
p += r * r
q += s * s
scale = eta * p / max(0.001, q) / (12.0 * size + 2.0)
for i in range(3):
df = scale * (ans(others, i) - pred[i]) * pred[i] * (1.0 - pred[i])
thr[i] *= decay
thr[i] -= df
for j in range(size):
if history[j][0] == -1:
break
for k in range(6):
weight[i][j][k] *= decay
weight[i][j][k] += value(j, k) * df
tmp = history[size - 1]
for i in range(size - 1, 0, -1):
history[i] = history[i - 1]
history[0] = tmp
history[0][0] = mine
history[0][1] = others

if input == '':
size = 4
decay = 0.9
eta = 0.2
weight = [[[random.gauss(0.0, 0.1) / size for k in range(6)] for j in range(size)] for i in range(3)]
thr = [random.gauss(0.0, 0.1) / size for i in range(3)]
history = [[-1 for k in range(2)] for j in range(size)]
pred = [0.0 for i in range(3)]
elif input == 'R':
result(old_mine, 0)
elif input == 'S':
result(old_mine, 1)
elif input == 'P':
result(old_mine, 2)
print(history)
output = action()
if output == 'R':
old_mine = 0
elif output == 'S':
old_mine = 1
elif output == 'P':
old_mine = 2``````