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The Advanced Pawn
P-K5 to Chase the King Knight (1 of 2)

Point Count Chess, NO.31, p52
Keres v. Szabo, 1955

The purpose of White's Advanced Pawn at K5 (e5) is usually to chase away Black's King Knight (Nf6), as that removes the strongest single Piece that typically defends the Black King, when Castled Kingside.

H&M-S say this chasing away of Black's Nf6 is often the sign that White is about to attack the defences surrounding Black's Kingside-Castled King.

Beneath the ChessFlash viewer, you'll find my analysis of the position featured in Point Count Chess:
  1. PCC, p.52, No.31, after 9...a6
  2. Result of the P-K5 to Chase the King Knight (1 of 2).
  3. Summary of the P-K5 to Chase the King Knight (1 of 2).
  4. PGN

P-K5 to Chase the King Knight (1 of 2)
My Analysis

Position #1, My Analysis
PCC, p.52, No.31, after 9...a6

After: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bg5 e6 7.Qd2 Be7 8.O-O-O O-O 9.f4 a6

Point Count Chess - IE - Diagram 31 - Page 52
After: 9...a6

1. The first Pawn trade: White's d-Pawn for Black's c-Pawn

Point Count Chess - IE - Diagram 31 - The Advanced Pawn, P-K5 to Chase the King Knight (1 of 2), After 1.e4 c5
The Advanced Pawn,
P-K5 to Chase the King Knight
(1 of 2), After 1.e4 c5
After 1.e4 c5, Black's c-Pawn advance in the Sicilian Defence (1...c7-c5), paves the way for the first Pawn exchange -- White trades his d-Pawn, to neutralize the threat from Black's c-Pawn.
Point Count Chess - IE - Diagram 31 - The Advanced Pawn, P-K5 to Chase the King Knight (1 of 2), After 2.Nf3 Nc6
The Advanced Pawn,
P-K5 to Chase the King Knight
(1 of 2), After 2.Nf3 Nc6
After 2.Nf3 Nc6, White's King Knight (2.Ng1-f3) and Black's Queen Knight (2...Nb8-c6) are developed to focus on the d4-square.

White intends to provoke an exchange of Pawns, and his King Knight is positioned, ready to complete the trade.

Black's Knight won't recapture, due to the ready-to-retaliate White Queen (Qd1).
Point Count Chess - IE - Diagram 31 - The Advanced Pawn, P-K5 to Chase the King Knight (1 of 2), After 3.d4 cxd4 4.Nxd4
The Advanced Pawn,
P-K5 to Chase the King Knight
(1 of 2), After 3.d4 cxd4 4.Nxd4
After 3.d4 cxd4 4.Nxd4, the first Pawn exchange is completed; White provokes the swap (3.d2-d4) and Black is content to enter into the exchange (3...c5xd4).

White's King Knight completes the trade (4.Nf3xd4).
Point Count Chess - IE - Diagram 31 - The Advanced Pawn, P-K5 to Chase the King Knight (1 of 2), After 4...Nf6
The Advanced Pawn,
P-K5 to Chase the King Knight
(1 of 2), After 4...Nf6
After 4...Nf6, Because of the threat from White's Qd1, Black chooses not to capture White's Nd4, but instead to develop his King Knight (4...Nb8-f6).

Black's Nf6 is the one that will be chased away, by White's f-Pawn (when it relocates to e5, from the f4-square).

2. The second Pawn trade: White's e-Pawn for Black's d-Pawn

Point Count Chess - IE - Diagram 31 - The Advanced Pawn, P-K5 to Chase the King Knight (1 of 2), After 5.Nc3 to 8...O-O
The Advanced Pawn,
P-K5 to Chase the King Knight
(1 of 2), After 5.Nc3 to 8...O-O
After 5.Nc3 to 8...O-O, there is a period of further development, without any material being captured.

White develops his Queenside Knight (5.Nb1-c3), which currently provides sole support to his e-Pawn. Meanwhile, his dark-Bishop (6.Bc1-g5) is sent out to apply a Pin to Black's Nf6. And, White's Queen and Queen Rook form a Battery along the d-file (7.Qd1-d2). Castling (8.O-O-O) takes place, which puts White's Queen Rook into the Battery.

Black develops his d- & e-Pawns to the 6th Rank (5...d7-d6 » 6...e7-e6). His dark-Bishop is developed (7...Bf8-e7) to clear the back rank, ready for Castling Kingside (8...O-O).

Specific mention goes to White's decision to Castle Queenside (8.O-O-O) ...

Point Count Chess - IE - Diagram 31 - The Advanced Pawn, P-K5 to Chase the King Knight (1 of 2), After 1.x
The Advanced Pawn,
P-K5 to Chase the King Knight
(1 of 2), After 8.O-O-O
After 8.O-O-O. Because White intends to take his f-Pawn off the f-file, and onto the e-file (where it will become the Advanced Pawn and chase away Black's Nf6), it will result in the Kingside Pawn Guard being numerically reduced to just 2x Pawns.

Furthermore, as Black intends to Castle Kingside, White intends to advance at least one of the two remaining Kingside Pawns, to attack Black's King.

Due to the weakening of his own Kingside Pawn structure, and the location of Black's King (once Castled), White opts to Castle Queenside, where the three Pawns all remain intact, on the second rank (a2, b2, and c2), to act as full-strength cover for White's King.

Point Count Chess - IE - Diagram 31 - The Advanced Pawn, P-K5 to Chase the King Knight (1 of 2), After 9.f4
The Advanced Pawn,
P-K5 to Chase the King Knight
(1 of 2), After 9.f4
After 9.f4, White advances his f-Pawn to the front line (9.f2-f4), in preparation for its relocation onto the e-file, where it will complete the last Pawn trade (White's e-Pawn for Black's d-Pawn), to become the Advanced e5-Pawn and Nf6-chaser.
Point Count Chess - IE - Diagram 31 - The Advanced Pawn, P-K5 to Chase the King Knight (1 of 2), After 10.e5 dxe5
The Advanced Pawn,
P-K5 to Chase the King Knight
(1 of 2), After 10.e5 dxe5
After 10.e5 dxe5, White pushes his e-Pawn into the Advanced position (10.e4-e5), and offers it to the waiting Black d-Pawn, which captures instantly (10...d6xe5).
Point Count Chess - IE - Diagram 31 - The Advanced Pawn, P-K5 to Chase the King Knight (1 of 2), After 11.Nxc5 bxc6
The Advanced Pawn,
P-K5 to Chase the King Knight
(1 of 2), After 11.Nxc5 bxc6
After 11.Nxc5 bxc6, White deliberately delays the f-Pawn's completion of the e-Pawn exchange.

His first act is to trade Black's Nc6 off the board (11.Nd4xc6), else Black's Knight could be sacrificed to take-out White's f-Pawn, when it lands on e5.

Black's b-Pawn is forced to complete the trade (11...b7xc6), because of the threat from White's Nc6, to Black's Qd8. However, it leaves Black with two Isolated Pawns on the Queenside (a6 & c6, respectively).

White is now free to take-out Black's e5-Pawn ...

3. White's f-Pawn becomes the Advanced e5-Pawn, and chases away Black's King Knight (Nf6)

Point Count Chess - IE - Diagram 31 - The Advanced Pawn, P-K5 to Chase the King Knight (1 of 2), After 12.fxe5 Nd7
The Advanced Pawn,
P-K5 to Chase the King Knight
(1 of 2), After 12.fxe5 Nd7
After 12.fxe5 Nd7, White's f-Pawn finally completes the Pawn exchange on e5 (12.f4xe5), and chases Black's Nf6 away, in the process (12...Nf6-d7).

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The Result of the P-K5 to Chase the King Knight (1 of 2)...

Point Count Chess - IE - Diagram 31 - The Advanced Pawn, P-K5 to Chase the King Knight (1 of 2), After 13.h4 to 15.Rh3
(RESULT) The Advanced Pawn,
P-K5 to Chase the King Knight
(1 of 2), After 13.h4 to 15.Rh3
After 13.h4 to 15.Rh3, Once Black's Nf6 has been chased away, White focuses on building up to his attack against Black's Kingside, with the intention of weakening the Pawn Guards surrounding their Castled King.

White's h-Pawn is moved up to support the dark-Bishop (13.h2-h4), while also creeping closer to Black's Kingside Pawn Guard.

White's Queen is brought across to the Kingside (14.Qd2-e3), coordinating her support for both the Advanced e5-Pawn and the dark-Bishop (Bg5).

White's King Rook is lifted up (15.Rh1-h3), to maintain its support for the h4-Pawn, while also giving support to its Qe3.

Point Count Chess - IE - Diagram 31 - The Advanced Pawn, P-K5 to Chase the King Knight (1 of 2), After 16.Bxe7 Rxe7
(RESULT) The Advanced Pawn,
P-K5 to Chase the King Knight
(1 of 2), After 16.Bxe7 Rxe7
After 16.Bxe7 Rxe7, White trades dark-Bishops off the board (16.Bg5xe7 Re8xe7), as Black's dark-Bishop provided a threat to White's mounting attack against Black's Kingside position.
Point Count Chess - IE - Diagram 31 - The Advanced Pawn, P-K5 to Chase the King Knight (1 of 2), After 18.Rxd7 Bxd7
(RESULT) The Advanced Pawn,
P-K5 to Chase the King Knight
(1 of 2), After 18.Rxd7 Bxd7
After 18.Rxd7 Bxd7, White sacrifices his d-file Rook, to take-out Black's Nd7 (18.Rd1xd7 Bc8xd7), which had been threatening to capture White's Advanced e5-Pawn. That's how important the e5-Pawn is to White's strategy for attacking Black's Kingside position.
Point Count Chess - IE - Diagram 31 - The Advanced Pawn, P-K5 to Chase the King Knight (1 of 2), After 21.Rxg7 Kxg7
(RESULT) The Advanced Pawn,
P-K5 to Chase the King Knight
(1 of 2), After 21.Rxg7 Kxg7
After 21.Rxg7 Kxg7, White also goes on to sacrifice his remaining Rook (21.Rg3xg7), which had earlier been moved to the g-file (17.Rh3-g3).

The purpose of this particular Rook sacrifice is to remove Black's g-Pawn, which blasts an entry point into Black's Pawn Guard wall. Black has gained the countable disadvantage of a Compromised King-side, which White goes on to fully exploit).

Black's King is the only Piece available to complete the trade (21...Kf8xg7), exposing it to attack from White's Queen (22.Qf4-f6+) and forcing Black's King to retreat. This buys more time for White to build upon his game-winning attack. Black resigns shortly after this.


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Summary of the P-K5 to Chase the King Knight (1 of 2)...

  1. White's d-Pawn is sacrificed to neutralize the threat from Black's c-Pawn (3.d2-d4 c5xd4 4.Nf3xd4).

  2. White's e-Pawn is sacrificed to neutralize the threat from Black's d-Pawn. White's e-Pawn is pushed into the Advanced position, at e5 (10.e4-e5), which invites the exchange for Black's d-Pawn (10...d6xe5). However, before White's f-Pawn completes the trade, White trades his Nd4 for Black's Nc6 (11.Nd4xc6 b7xc6), to ensure nothing can capture White's f-Pawn, once it moves across onto e5.

  3. White's f-Pawn becomes the Advanced e5-Pawn, when completing the delayed Pawn exchange on e5 (12.f4xe5), and is the Pawn that chases away Black's Nf6 (12...Nf6-d7).

  4. With Black's Nf6 successfully chased away, White is clear to mount his attack against Black's Kingside position (where Black's King had earlier Castled: 8...O-O).

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PGN

[Event "Budapest"]
[Site "Budapest"]
[Date "1955"]
[EventDate "?"]
[Round "?"]
[Result "1-0"]
[White "Paul Keres"]
[Black "Laszlo Szabo"]
[ECO "B64"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "45"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bg5 e6 7.Qd2 Be7 8.O-O-O O-O 9.f4 a6 {PCC p.52 No.31} 10.e5 dxe5 11.Nxc6 bxc6 12.fxe5 Nd7 13.h4 Rb8 14.Qe3 Re8 15.Rh3 Qa5 16.Bxe7 Rxe7 17.Rg3 Re8 18.Rxd7 Bxd7 19.Bd3 h6 20.Qf4 Kf8 21.Rxg7 Kxg7 22.Qf6+ Kf8 23.Bg6 1-0

End.

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