Interesting Puzzle

For those who miss the regular hum of Yale chess meetings during the lazy summers, there is a fun chess problem and story on ChessBase today for you to solve. Apparently, it was from a real game, and quotes four players contradicting each other, two claiming a win for Black, two insisting on a victory for White. Classic!

Ultimately, White resigns, thinking the position lost, but his stronger opponent then points out a winning sequence. Naturally, they’re both wrong ;). The resignation sequence is reminiscent of an amusing anecdote IM Jeremy Silman gave in his The Amateur’s Mind — he resigned after suffering for most of his game, only for his grandmaster opponent to remark, “I was about to offer a draw. You have an immediate perpetual check!” (pg 311). Not exactly the same, but similar to this puzzle…

Analysis (spoiler)