I would not call this puzzle "easy," and if you missed ...Rh8!!; then:

a.) You did not correctly solve the puzzle.

b.) You missed the point of the whole problem.

c.) I also found ...Qf4; but missed the idea of trapping the Queen. (With the amazing ...Rh8!!)

d.) To me, it is an extremely unusual idea, the "slow-motion" idea ... and the fact that White is so helpless to prevent it.

Z. Domnitz (2350) - GM Ludek Pachman (2510)
[C75] / Netanya-A, (R9) / 1973.

1.e4 e5; 2.f3 c6; 3.b5 a6; 4.a4 d6!?; 5.c3 d7; 6.d4 ge7;

The Steinitz Defense, (Opening Explorer ) - to the RL.

(The improved of 'deferred' version, as many books like to call it. See MCO-14, beginning on page 53; for more details.)

7.b3 h6; 8.bd2 g6; 9.c4,
<(White is better.)>

9...e7;

All this has been played ...
many times ... (before and since this game was played). There are 114 games in the CB on-line DB with this position.

For an example of a good way to play this line for White, please see Smyslov vs Reshevsky, 1948.

10.dxe5 dxe5; 11.e3 g5; 12.0-0 xe3; 13.xe3 f6; 14.d2,

White had a big edge out of the opening, but now it has almost completely evaporated.

< [Maybe better was 14.Bd5 or 14.Ne1.] >

14...f4; 15.xf4!?,
White gives Black a doubled pawn, but loses a lot of his ability to control the dark squares with this move.

< [ Maybe better was:
15.Bd5 0-0-0!?; 16.Qb3, (uclr)
when White might have a slight edge. ] >

White now gets adventurous with his Queen. (When it works, it is praised as bold; when it fails; it is condemned as foolish.)

15...exf4!; 16.h5!? 0-0; 17.f3 fe8; 18.fe1, Lackluster.

18...e5!!;
Not even most programs will seriously consider this deep exchange sacrifice.

An early version of Fritz considers 18...Ne5 to be nearly forced here, that line may have only resulted in a draw.

19.xe5 xe5; 20.d1!?, ('?!')
In my mind, this is probably dubious, 20.h3 looked like a simpler solution. (It is also this one clumsy move that is at the root of all of White's problems in this game.)

20...d8; 21.e2?!,
This is probably the losing move of the game. White already has some difficulties, but would avoid the loss of his Queen by withdrawing it to the e2-square.

("24.Be2?" - D. Minic, Informant # 16.)

21...h7!; 22.g4 f3; 23.g5 f4!; 24.f1 h8!!; " " White resigns. (The WQ is doomed.)

For example: 25.Rad1, g6!; 26.QxP/h6+, Kh8.

A pleasing miniature. - A.J. Goldsby

Well no, not completely as i looked for a second, maybe 10 but not much more, about trapping the queen but soon left the idea. Instead i went for 23. ...g6.

If gxf6 then gxh5 and white probably has to give up his bishop due to the threat of Rg8. If 24. Qh4 then fxe2 with the threat of Nf3.

<(The improved of 'deferred' version, as many books like to call it. See MCO-14, beginning on page 53; for more details.)>

The "of" here - in the above passage - should (obviously) be "or," I hope that did not throw anyone off.