Champion Of Champions (part six)

HERE is the tournament bracket after five matches.

Round of 16               Quarter-Finals
1. Steinitz
v----------------------------Carlsen
16. Carlsen (+102.5)

8.Tal (+8.5)
v----------------------------Tal
9.Petrosian

6. Botvinnik (+66)
v----------------------------Botvinnik
11. Fischer

13. Kasparov
v----------------------------Alekhine
4. Alekhine (+21.5)

3. Capablanca
v----------------------------Kramnik
14. Kramnik (+12)

5. Euwe
v--------------------------
12. Karpov

7. Smyslov
v--------------------------
10. Spassky

15. Anand
v--------------------------
2. Lasker

Round of 16
Match Six: Euwe v Karpov
Game One
Max Euwe - Anatoly Karpov
Nimzo-Indian
1.d4 Nf6 2.c4 e6 3.Nc3
The first time in this tournament White has allowed a Nimzo-Indian.
3...Bb4 4.Qc2 0-0 5.Bg5!?

Karpov has not faced 5.Bg5!?

Stockfish11 and Komodo11.01 are unimpressed with Euwe's opening play, evaluating the position as dead-equal, giving the Dutch world champion an uphill task in game two.

Game Two
Anatoly Karpov - Max Euwe
QGD Semi-Tarrasch
1.d4 Nf6 2.c4 e6 3.Nf3
No Nimzo-Indian this time.
3...d5 4.Nc3 c5!?
Aggressive play by Euwe. He preferred this over 4...c6 by 17 games to 16 in ChessBase's 2020 Mega database.
5.cxd5 Nxd5 6.e4 Nxc3 7.bxc3 cxd4 8.cxd4 Bb4+
Euwe reached the position after 8.cxd4 twice as Black, playing 8...Nc6 in a 1932 draw against Flohr and the text in a 1937 draw against Alekhine. The text is chosen on tiebreak by having been played more recently.
9.Bd2 Bxd2+ 10.Qxd2 0-0 11.Rc1

As far as we can go

The engines give Karpov an averaged advantage of +11.5, meaning he wins the match by the same score.
Here is the updated tournament bracket.

Round of 16               Quarter-Finals
1. Steinitz
v----------------------------Carlsen
16. Carlsen (+102.5)

8.Tal (+8.5)
v----------------------------Tal
9.Petrosian

6. Botvinnik (+66)
v----------------------------Botvinnik
11. Fischer

13. Kasparov
v----------------------------Alekhine
4. Alekhine (+21.5)

3. Capablanca
v----------------------------Kramnik
14. Kramnik (+12)

5. Euwe
v----------------------------Karpov
12. Karpov (+11.5)

7. Smyslov
v--------------------------
10. Spassky

15. Anand
v--------------------------
2. Lasker