White: Olaf Ulvestad
Black: Herman Steiner
U.S. Open, 1946, Pittsburgh, PA

1  Nf3   f5
2  c4    Nf6
3  Nc3   e6
4  g3    d5
5  cxd5  exd5
6  Bg2   c6
7  d4    Bd6
8  Bf4   Bxf4
9  gxf4  Ne4
10 e3    Nd7
11 Qc2   0-0
12 0-0-0 Ndf6
13 Ne5   Qa5
14 Bxe4  fxe4
15 Rhg1  Be6
16 Kb1   Rac8
17 Qa4   Qc7
18 Qa3   Rfd8
19 Rc1   a6
20 Na4   Ne8
21 Qb4   Nd6
22 Nb6   Rb8
23 b3    Re8
24 Rg5   Rbd8
25 Rcg1  Re7
26 h4    Nf5
27 h5    Qd6
28 Qa5   Rf8
29 Na4   Qa3
30 Qb6   Bc8
31 Nc3   a5
32 h6!

   Did Black miss this?  If 32...Nxh6 33 Nxd5! crashes through.  After
   32...g6 Ulvestad gives 33 Rxg6+! hxg6 34 Nxg6 winning back at least a
   whole rook, due to the threat of 35 Nxf8+ Kxf8 36 Qd8+.

32 ...   Qb4
33 hxg7!

   If now 33...Qxb6 34 gxf8Q+ Kxf8 35 Rg8 mate.

33 ...   Nxg7
34 Nxd5  Qxb6
35 Nxe7+

   35 Nxb6 was fine, but White goes for more.

35 ...   Kh8
36 N5g6+!

   It may seem that 36 Rxg7 is adequately met by 36...Be6.  But then 37 Rf7!
   drives the last nail in the coffin:  37...Bxf7 38 Nxf7+ Rxf7 39 Rg8 mate,
   or 37... Rxf7 38 Rg8 mate, or 37...Qd8 38 N5g6+ hxg6 39 Rh1+ Bh3
   40 Rxh3 mate.  The text move ought to have worked, too.

36 ...   hxg6
37 Rh1+??

   37 Rxg6 with threats of 37 Rh6 mate or 37 Rh1+ is crushing.

37 ...   Nh5
38 Rxg6  Qb5
39 Ka1??

   "A hallucination" according to Ulvestad, who gives the drawing line 39 Rg5
   Qd3+ (but not 39 ... Qxg6 40 fxg5 Bg4 41 Ng6+ Kg7 42 Nxf8 Kxf8 43 Rc1 and
   White cleans up).

39 ...   Kh7
40 Rg5   Qxg5
41 fxg5  Bg4
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