wwall: This game was annotated by Geller in his book, the Application of Chess Theory and by Zuckerman in Chess Life, January 1969. Both sources say the moves were 6.Nf3 (not 6.h4 as in this game) Nd7 7.h4 h6 8.h5 Bh7 9.Bd3 Bxd3 10.Qxd3.
Geller, Hort, and Zuckerman all say that 26...Kc7 was the losing move, and that 26...Be7 should have been played. Geller would than have played 27.f4.
Geller says that 27...Be7 would have lost as Black is totally forced onto the defensive. But 27...Be7 may be OK. For example, 27...Be7 28.Qxf7 Qxc4+ 29.Kd2 Qd5+ 30.Ke1 Qh1+ 31.Ke2 Kd7 32.Qxf7 Qxh5+ 33.g4 Qh1 34.Bxc5 Qe4+ 35.Be3 Qc2+ 36.Kf3 Qxb2 37.Bxa7 b6, threatening 38...Qxa3 looks drawish.
Instead of 37...Bg3, which looks like the losing move, perhaps 37...b6 38.Ke4 Bb2 39.a4 Qb7+.
Instead of 38.Ke4, perhaps better is 38.Qf5+ Kg8 39.Bxc5, winning a pawn and threatening 30.Bxa6.
Instead of 38...Bh2, perhaps 38...b6 39.Kf5 Qd8, which offers more resistance.
Instead of 39.Kf5, perhaps better is 39.Qf5+ Kg8 40.Qxc5 Qxc5 41.Bxc5, winning a pawn and exchanging queens.
Instead of 40.Bd2, perhaps 40.b4 cxb4 41.axb4 b6 42.Kg6 Be5 43.c5. Geller said that after 40.Kg6 the game would continue 40...Qd6 41.Qxd6+ Bxd6 42.Bc1 Be5, when White still has to work to achieve the win. But after 40...Qd6??, White plays 41.Bxc5! pinning the queen and king. If 41....Qxc5, then 42.Qf7 mate.
Geller says that the game was adjourned after 41...Qf7+ and Hort resigned the next day. Geller and Zuckerman said that 42.Qxf7+ Kxf7 43.Ke4 and 44.Kd5 wins as the White King breaks through to Black's Queenside pawns. It would have been interesting if they had played this game out without adjourning. Black may have some chances to draw after 43...Bg1 or 43...Bg3.