[Event "Nice"]
[Site "Nice"]
[Date "1930"]
[White "Maroczy, Geza"]
[Black "Duchamp, Marcel"]
[Result "1-0"]
[ECO "B18"]
[PlyCount "37"]

{A game from the famous artist Marcel Duchamp, who quit art to become a chess player}

1.e4 
{B00 King's Pawn Opening. The King's Pawn opening move is both popular and logical. It controls the center, opens lines
for both the Queen and the Bishop, and usually leads to an open game in which tactics, rather than slow maneuvering,
predominates.} 
1...c6 
{B10 Caro-Kann Defense. The Caro-Kann Defense may be compared to the Slav Defense against the Queen's Pawn:  It strives
for defense of the strong-point at d5 and development of the Queen's Bishop.} 
2.d4 
{B10 Caro-Kann Defense. 1.e4 c6 2.d4 is the start of the Caro-Kann Defense, a defense of long-standing merit. Black
quietly stakes out a share of the center via support for the ...d5-pawn, and will use the half open c-file  (after the exchange
on d5) for his counterplay. If Black avoids the exchange on d5, Black will then play ...c5 later, undermining White's center.} 
2...d5 3.Nc3 dxe4 4.Nxe4 Bf5 
{B18 Caro-Kann Defense / Capablanca Variation - Main Line. With the development of the Queen's Bishop at f5 or g4,
Black solves his positional problems.} 
5.Ng3 Bg6

6.f4 
{B18 Caro-Kann Defense / Capablanca Variation - Main Line / Maroczy Attack.} 
6...e6

7.Nf3 Nd7 8.Bd3 
{Out of Opening Book. Enables the short castle.} 
8...Ne7 9.O-O Bxd3 
{Threatens White's rook at f1.} 
10.Qxd3 
{Removes the threat on White's rook at f1. White wins a bishop for a bishop. Material is even.} 
10...g6 11.Ne4 
{Threatens mate (knight to d6).} 
11...Bg7 
{Leads to 12.Nd6+ Kf8 13.Ng5 Nb6 14.Ndxf7 Qxd4+ 15.Qxd4 Bxd4+ 16.Kh1 h6 17.Nxh8 hxg5 18.fxg5+ Kg8 19.Nf7 Rf8 20.Nh6+
Kg7 21.Rxf8 Kxf8, which wins a queen, a rook, a knight, and a pawn for a queen, two rooks, and two pawns. Better is Nf5, leading
to 12.Bd2 Be7 13.Rae1 O-O 14.g4 Nd6 15.Nxd6 Bxd6 16.f5 exf5 17.gxf5, which wins a knight and a pawn for a knight and a pawn.} 
12.Nd6{+} 
{Forks Black's king and Black's pawn at b7.} 
12...Kf8 
{Forced. Moves it out of check.} 
13.Ng5 
{Blocks Black's pawn at g6.} 
13...Qb6 
{Pins White's pawn at d4 and removes the threat on Black's pawn at b7.} 
14.c3 
{Slightly better is Ndxf7.} 
14...c5 
{Threatens White's knight at d6.} 
15.Ndxf7 
{Threatens Black's rook at h8 and isolates Black's pawn at e6. White wins a pawn. White is up a pawn.} 
15...Rg8 
{Moves it to safety.} 
16.Ne5 
{Threatens Black's knight at d7 and blocks Black's pawn at e6.} 
16...Nf6 
{Leads to 17.Nxh7+ Ke8 18.Nxf6+ Bxf6 19.Nd7 c4 20.Nxb6 cxd3 21.Nxa8 Kd7 22.Rf3 Rxa8 23.Rxd3, which wins a queen and
two knights for a queen, a rook, a knight, and two pawns. Better is Nxe5, leading to 17.fxe5+ Ke8 18.Rf6 Bxf6 19.exf6 Rh8
20.fxe7 cxd4 21.cxd4 Rc8 22.Ne4 Kxe7, which wins a rook, a knight, and two pawns for a bishop, two knights, and a pawn.} 
17.Qc4 
{Slightly better is Nxh7+.} 
17...cxd4 
{Danger! Leads to 18.Nxe6+ Ke8 19.Nc7+ Qxc7 20.Qxc7 Rd8 21.cxd4 Nd7 22.Qxb7 Nxe5 23.dxe5 Rd7 24.Qb8+ Kf7 25.Qb3+ Nd5,
which wins two knights and a pawn for a queen, a knight, and three pawns. Much better is Ke8, leading to 18.dxc5 Qa5 19.Nxe6 b5
20.Nxg7+ Rxg7 21.Qe6 Nd5 22.Rd1 Rd8, which wins a knight for a bishop and two pawns. This was black's key blunder. Black was
never able to recover and eventually resigned.} 
18.Nxe6{+} 
{Checks Black's king and isolates Black's pawn at d4. White wins a pawn for a pawn. White is ahead by a pawn.} 
18...Ke8 
{Moves it out of check.} 
19.Nc7{+} 
{Forks Black's rook at a8 and Black's king. Black
resigns.}

Knight fork

White to move and win. C8 to get PGN
A game from the famous artist Marcel Duchamp, who quit art to become a chess player

This fork # 5.2 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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