"Manganoid" by Timsoft (more from this author)

"Miss Mind" by NSG (more from this author)
Ahhh, FINALLY something remotely intellectually challenging. Wait, stay! This
is just mastermind - guessing the right combination. She will give you some
clues: A heart means the number is correct, a question mark means the number
is at the wrong place. Oh, did I mention she will strip everytime you win ?