1.c4
e6
2.Nf3
d5
3.d4
Nf6
The Queen's Gambit Declined
4.Nc3
Be7
5.Bg5
0-0
6.e3
Nbd7
7.Bd3
c5
8.0-0
cxd4
9.exd4
dxc4
10.Bxc4
Nb6
11.Bb3
Bd7
12.Qd3
Nbd5
13.Ne5
Bc6
14.Rad1
Nb4
Diagram Moving the Nd5-b4 making the way to exchange the "bad" Bc6 on d5
White's queen is under ttack from the Nb4. Botvinnik plans a magnificent attack, based upon his control of e5 and f2-f4-f5 with the Rf1 in support.
15.Qh3
Supporting f4-f5
15...Bd5
Exchanging the bad bishop.
16.Nxd5
Nbxd5
Maintaining a piece on d5 to blockade the white d4-pawn
17.f4
launching the kingside attack
17...Rc8
A natural move, placing the rook on the open file, but there are no entry squares at c1, c2, c3, or c4
18.f5
Two attacks upon the e6-pawn
18...exf5
undermining black's support for d5
19.Rxf5
Do you see the threat?
19...Qd6
Diagram
20.Nxf7!
Rxf7
[20...Kxf7
21.Bxf6
And the pinned Nd5 will fall.]
21.Bxf6
Bxf6
[21...Nxf6
22.Rxf6
Exposing the Qh3xc8 threat]
22.Rxd5
Qc6
23.Rd6
Black's house is crumbing. Qxd6 meets Qxc8+
23...Qe8
24.Rd7
winning the Rf7 1-0