Typical game:

+SCISSORS =PAPER +PAPER +ROCK =SCISSORS =ROCK +SCISSORS +PAPER -SCISSORS =SCISSORS =PAPER +PAPER +PAPER -ROCK +ROCK +SCISSORS +SCISSORS

win @ repeat: 5, win @ change: 5, loss @ repeat: 0, loss @ change: 2, draw @ repeat: 1, draw @ change: 4

First 5 throws are 100% predictable and its results are used by the program for subsequent predictions. It's too easy to set up traps.