"Russian Dolls" CrackME
You will quickly find "good boy" and "bad boy" message.
The decision is based on one call. No tricks.
The call is to the "Russian Dolls" verification function. (Russian dolls are those dolls where there's like one inside another, and one inside that, and so on...)
You'll quickly see the similarity of how this verificationi function executes and the dolls that the crackme name refersi to.
Write a keygen and a tutorial!