[Event "Belgrade"]
[Site "Belgrade"]
[Date "1964"]
[White "Trifunovic, Petar"]
[Black "Spassky, Boris V"]
[Result "1/2-1/2"]
[ECO "A33"]

{Even the future World champion!}

1.d4 
{A40 Queen's Pawn Opening. The Queen's Pawn opening move is somewhat slower than the popular e4, because White will not be
able to castle for three more moves. Its advantage is that it gives White more control over tactical surprises and often
provides more lasting initiative and pressure.} 
1...Nf6 
{A45 Indian Defense. The immediate development of the Knight is the most supple response to the Queen's Pawn opening,
allowing transposition into virtually every type of defense at Black's disposal.} 
2.Nf3 
{A46 Indian Defense / Torre Attack. The Torre Attack is characterized by White's second and third moves, Nf3 and Bg5.
White avoids several defenses that would be possible after 2.c4, and prepares a Kingside attack along the lines of the Colle
opening.} 
2...c5 3.c4 
{A04 King's Indian Attack / Symmetrical Variation (transposed).} 
3...cxd4 4.Nxd4 4...Nc6 
{Out of Opening Book. g6 would have been in the King's Indian Attack / Symmetrical Variation book opening.} 
5.Nc3 e6 6.Ndb5 d5 
{A35 English Opening / Symmetrical Variation / Four Knights System.} 
7.Bf4 d4 
{Out of Opening Book. e5 would have been in the English Opening / Symmetrical Variation / Four Knights System book
opening. Slightly better is e5.} 
8.Nc7{+} 
{Protects White's knight at c3 and forks Black's rook at a8 and Black's king.} 
8...Ke7 
{Moves it out of check and attacks White's knight at c3.} 
9.Qa4 
{Slightly better is Nxa8.} 
9...Nh5 
{Attacks White's bishop at f4.} 
10.Nxa8 Nxf4 
{Takes the knight away from the edge of the board. White wins the exchange (Rook for Bishop).} 
11.Nb5 
{Moves it to safety.} 
11...Bd7 
{Attacks White's knight at a8.} 
12.g3 
{Threatens Black's knight at f4.} 
12...Ng6 
{Moves it to safety.} 
13.Qa3{+} 
{Protects White's knight at a8 and checks Black's king.} 
13...Kf6 
{Moves it out of check and forks White's knight at a8 and White's queen.} 
14.Qf3{+} 
{Moves it to safety, protects White's knight at a8, and checks Black's king.} 
14...Ke7 
{Moves it out of check and attacks White's knight at a8. The game ends in a
draw. 1/2-1/2

Knight fork

White to move and win. E7 to flip board. C8 to get PGN.
This fork #4.4 is explained in ebook "Fork, a common chess pattern" on Amazon.com , by Rodolfo Pardi.

For additional training on patterns, you can visit this page of mine: Patterns

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