Originally posted by BowmannAre you serious? We know.
Black draws by 1...Qc4+ when White has two replies.
If White interposes the Pawn by 2. b3, then 2...Qxc2+ which allows perpetual check after 3. Ka1 Qc1+ 4. Ka2 Qc2+ etc.
If, instead, White replies by moving the King to his first rank by 2. Ka1 or b1, 2...Qf1+ then forces White to repeat the position by 3. Ka2 whereupon Black once more checks by 3...Qc4+ and so on.