|Resignation Trap: The endgame starting at White's 60th move is a tablebase draw, according to http://www.shredderchess.com/online... .|
Nevertheless, this game reaches a critical point after 63.h4:
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Now, 63...Kf6, 63...Ke6 and 63...Rh8 should all draw. For example,
63...Rh8 64.f4 Kf6 65.Rg5 Kf7 66.h5 Ra8 67.Kg4 Ra1 =.
After Black's 63...Ra1?, Keres played the winning 64.h5! and never gave his opponent another chance to draw.
A few rounds later in the same tournament, Smyslov successfully defended the same endgame: Gligoric vs Smyslov, 1947 .
Of this particular endgame with +f+h vs. , Borislav Ivkov wrote: "While Smyslov was able to draw several times with the weaker side, Keres always won when he had the two pawn advantage. Who is to be trusted?"