unferth: <Nova: Surely white could have guarded the g2 pawn and not allow the rook to capture>
the only way to guard the pawn is with the queen on c2, d2, or e2, and after Rxg2 Qxg2 Rxg2 Kxg2, the R+Ps v. B+N+Ps ending looks dead lost for white, I think. Horowitz must have thought his chances for a perpetual or a winning tactical shot were better with the queen on the board.
<I can't help but chuckle at 30...Rb8. In most grandmaster games I have seen, any weak pawns like that pawn would be sacrificed to gain time for an attack. Was Reshevsky's opponent so weak compared to him that he thought he could wait around and let his opponent destroy his own position?>
Horowitz was past his prime but certainly no weakling. my guess is that Reshevsky protected the b pawn because he either (a) saw no immediate attack & thus no advantage to giving away his slim material edge or (b) was in time pressure, from which he suffered perhaps more often than any other top player in history (or both).