Mutual Blindspot

SOMETIMES a drawing line is staring both players in the face, but neither can see it.

White to make his 32nd move in Marcelo Garcia Pastor (1703) - Spanton (1934), Benidorm U2000 Round 5

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32.Rxe2? Rxb4 (0-1, 51 moves)
Certainly White had to avoid 32.Rb1?? Rd1. But he had excellent drawing chances with 32.a3 Rd3 33.Rxe2 Rxa3 34.Re8+ Kg7 35.Rb8, although Stockfish10 and Komodo10 reckon Black maybe has a slight edge after the further moves 35...a5 36.Rxb7 axb4 37.Rb6!