Deep down I always believed you.
K(7,1) is illegal, the hawk controls that square.
If it was early in the game I'd let you take it back, but you're already crushed and it just prolongs the agony, so goodbye chancellor.
37... Rx(8,3)
There's probably always a better move. With the obvious exception of capturing pieces, I think I've probably made one optimal move, and even then I can't be certain. That move was Q(3,-2).
I'm definitely curious what you saw, but probably best left until the game is over, or at least until the position has changed significantly, for example a trade of queens.
I told ya I'd lose... K(7,1)