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The Isolated Pawn
Inviting the Isolani (1 of 2)

Point Count Chess, NO.78, p112
Example Sequence

In this example, White's d4-Pawn becomes the Isolated Pawn. White invites the Isolani in order to gain Control of the Center. White can then proceed to build his plan around his Mobile Isolani (see No.74, for an example of this).

Beneath the ChessFlash viewer, you'll find my analysis of the position featured in Point Count Chess:
  1. PCC, p.112, No.78, after 4.c4
  2. Result of Inviting the Isolani (1 of 2).
  3. Summary of Inviting the Isolani (1 of 2).
  4. PGN

Inviting the Isolani (1 of 2)
My Analysis

Position #1, My Analysis
PCC, p.112, No.78, after 4.c4

After: 1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4

Point Count Chess - IE - Diagram 78 - Page 112
After: 4.c4

1. How White Invites the Isolani

Point Count Chess - IE - Diagram 78 - The Isolated Pawn, Inviting the Isolani, After 1.e4 c6 2.d4 d5
The Isolated Pawn,
Inviting the Isolani (1 of 2),
After 1.e4 c6 2.d4 d5
After 1.e4 c6 2.d4 d5, tension develops between Black's d5-Pawn and White's e4-Pawn, after White pushes both Center Pawns into the Center (1.e2-e4 » 2.d2-d4), while Black causes the tension, by forming a Chain (1...c7-c6 » 2...d7-d5) that attacks White's e4-Pawn.
Point Count Chess - IE - Diagram 78 - The Isolated Pawn, Inviting the Isolani, After 3.exd5 cxd5
The Isolated Pawn,
Inviting the Isolani (1 of 2),
After 3.exd5 cxd5
After 3.exd5 cxd5, White forces an exchange of Pawns onto d5 (3.e4xd5 c6xd5) to leave White's d4-Pawn with only the c-Pawn for Pawn support.
Point Count Chess - IE - Diagram 78 - The Isolated Pawn, Inviting the Isolani, After 4.c4
The Isolated Pawn,
Inviting the Isolani (1 of 2),
After 4.c4
After 4.c4, White invites the Isolani, as his c-Pawn leaves White's d4-Pawn without Pawn support, when it comes out to attack Black's d5-Pawn (4.c2-c4).

2. White's d4-Pawn becomes the Isolated Pawn

Point Count Chess - IE - Diagram 78 - The Isolated Pawn, Inviting the Isolani, After 4...dxc4
The Isolated Pawn,
Inviting the Isolani (1 of 2),
After 4...dxc4
After 4...dxc4, White's d4-Pawn becomes the Isolated Pawn, as Black's replacement d5-Pawn breaks the tension to capture White's c4-Pawn (4...d5xc4).

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The Result of Inviting the Isolani (1 of 2)...

3. The purpose of White Inviting the Isolani, is to gain Center Control

Point Count Chess - IE - Diagram 78 - (RESULT) The Isolated Pawn, Inviting the Isolani (1 of 2), After 5.Bxc4
(RESULT) The Isolated Pawn,
Inviting the Isolani (1 of 2),
After 5.Bxc4
After 5.Bxc4, White's light-Bishop completes the exchange of Pawns, on c4 (5.Bf1xc4), giving White Control of the Center, in exchange for incurring the Isolated d4-Pawn.

The diagram, left highlights White's control of ¾ of the Center:
  • White's Isolated d4-Pawn controls the e5-square;

  • White's Bc4 controls the d5-square against Black's more-vulnerable Queen;

  • White's Qd1 controls the d4-square, as she supports the Isolated d4-Pawn.

4. Going forward, White can now build his plan around his Mobile Isolani (d4-d5)

Point Count Chess - IE - Diagram 78 - (RESULT) The Isolated Pawn, Inviting the Isolani (1 of 2), After 5.Bxc4
(RESULT) The Isolated Pawn,
Inviting the Isolani (1 of 2),
After 5.Bxc4
After 5.Bxc4, H&M-S say: "White's pieces come out to excellent posts with great rapidity; he has open files for both rooks."

And, as for Black's situation, they say: "the Black king pawn is held back, and at the same time Black must continually reckon with P-Q5 (d4-d5)."

See No.74, The Mobile Isolani, for an example of how White might make progress, from here.

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Summary of Inviting the Isolani (1 of 2)...

  1. White invites the Isolani, first by allowing tension to develop between his e4-Pawn and Black's d5-Pawn (1.e2-e4 vs. 2...d7-d5), before forcing the exchange of Pawns on d5 (3.e4xd5 c6xd5). White's c-Pawn then leaves White's d4-Pawn without Pawn support, to attack Black's replacement d5-Pawn (4.c2-c4).

  2. White's d4-Pawn becomes the Isolated Pawn, as Black's replacement d5-Pawn breaks the tension to capture White's c4-Pawn (4...d5xc4). White's light-Bishop completes the trade (5.Bf1xc4).

  3. The purpose of White Inviting the Isolani, is to gain Center Control, with the his units controlling ¾ of the Center: White's Isolated d4-Pawn controlling the e5-square; White's Bc4 controlling the d5-square against Black's more-vulnerable Queen; and White's Qd1 controlling the d4-square, as she supports the Isolated d4-Pawn.

  4. Going forward, White can now build his plan around his Mobile Isolani (d4-d5). See No.74, The Mobile Isolani (1 of 2), for an example of how White might make progress, from here.

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PGN

[Event "PCC, p112 Diagram NO. 78"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Horowitz"]
[Black "Mott-Smith"]
[Result "*"]
[PlyCount "7"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 {PCC, p112 Diagram NO.78} dxc4 5.Bxc4 *

End.

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