ok well the game that you have to play in jail is an old game called cows and bulls,
whilst trying to read up on it one day i can across this solver.
very simple to use...
http://pyva.net/eng/pc/bk.html
16kb. very tiny file.
ok well you have to make the first guess to the guard.
the solver will always say first guess = 0123, but this program wasn't made for VCO so you have to +1 to every digit in the series. so your first gues will be 1234
then the guard will say sometime like 1b2d (cant remember the letters he uses, but there not important)
once you have this answer, you enter it in the program. but only the numbers, the letters you replace with a space.
for the above you would type (space)1(space)2 into the solver.
then you will be given another number from the solver, say it was 3421.
remember add +1 to ever digit, so its 4532,
then the guard will say something like 0b0d, once again you add them to the solver, remembering to replace the letters with a space.
repeat this method and you will be out of jail in no time
if done correctly, you will always win.
Note. if a 9 is given to you to use as a guess, that must be changed to a 1.
ps. VCO frowns upon players using solvers as it "aids" playing. you cant be traced or b caught using this program at all as it runs interdependently to vco, just dont go yelling about it over public chat