user18029: Bobby Fischer's openings in the 1972 World Chess Championship are said to have taken Spassky completely by surprise:

Fischer played always e4 as his opening move, in football terms he had a very limited playbook, he always played the same opening moves, and (in 1972 WCC) he defied the Russians (and the world) to beat him. From the age of 12 - 29, he played exactly the same opening moves.

In the 1972 World Chess Championship, how many new openings did Fischer use against Spassky, and across how many games did he use them?

user24963: Fischer kept changing the openings quite a bit:

Game 3 (black) he played a Benoni (slight surprise).
Game 6 (white) he played c4 for the third time in a serious game (transposed to -QGD).
Game 8 (white) he played c4 again and it was a proper English
Game 9 (black) Queens Gambit Declined - Semi Tarrasch (slight surprise)
Game 10 (white) he played c4 again (transposed to QGD Orthodox)
Game 13 (black) he played Alekhine's defense.
Game 14 (white) he played c4 (QGD)
Game 17 (black) he played the Pirc Defense for the first time in his career
Game 19 (black) he played Alekhine's defense again
Game 21 (black) he played a line of the Sicilian (Taimanov) that was new to him.

You can check the list of opening here:
https://en.wikipedia.org/wiki/World_Chess_Championship_1972
And here are the list of Fischer's most played openings:
https://www.chessgames.com/perl/chessplayer?pid=19233

18029: <p>Bobby Fischer's openings in the 1972 World Chess Championship are said to have <a href="https://www.youtube.com/watch?v=oSyMmleisQM#t=26m30s" rel="nofollow noreferrer">taken Spassky completely by surprise</a>:</p>
<blockquote>
<p>Fischer played always e4 as his opening move, in football terms he had a very limited playbook, he always played the same opening moves, and (in 1972 WCC) he defied the Russians (and the world) to beat him. From the age of 12 - 29, he played exactly the same opening moves.</p>
</blockquote>
<p>In the 1972 World Chess Championship, how many new openings did Fischer use against Spassky, and across how many games did he use them?</p>
 24963: <p>Fischer kept changing the openings quite a bit:</p>
<ul>
<li>Game 3 (black) he played a Benoni (slight surprise).</li>
<li>Game 6 (white) he played c4 for the third time in a serious game (transposed to -QGD).</li>
<li>Game 8 (white) he played c4 again and it was a proper English</li>
<li>Game 9 (black) Queens Gambit Declined - Semi Tarrasch (slight surprise)</li>
<li>Game 10 (white) he played c4 again (transposed to QGD Orthodox)</li>
<li>Game 13 (black) he played Alekhine's defense.</li>
<li>Game 14 (white) he played c4 (QGD)</li>
<li>Game 17 (black) he played the Pirc Defense for the first time in his career</li>
<li>Game 19 (black) he played Alekhine's defense again</li>
<li>Game 21 (black) he played a line of the Sicilian (Taimanov) that was new to him.</li>
</ul>
<p>You can check the list of opening here:
<a href="https://en.wikipedia.org/wiki/World_Chess_Championship_1972" rel="noreferrer">https://en.wikipedia.org/wiki/World_Chess_Championship_1972</a></p>
<p>And here are the list of Fischer's most played openings:
<a href="https://www.chessgames.com/perl/chessplayer?pid=19233" rel="noreferrer">https://www.chessgames.com/perl/chessplayer?pid=19233</a></p>
