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The Isolated Pawn
The Mobile Isolani (2 of 2)

Point Count Chess, NO.75, p109-110
Denker v. Siff, 1933

In this example, White's e-Pawn becomes the Isolated Pawn, on the d-file.

Once again, as in No.74, White employs a collateral threat (focusing on Black's Pinned f7-Pawn), which buys time for White to be able to mobilize his Isolated Pawn, at a time when it's to White's advantage (in this case, it's following the capture of Black's Pinned f7-Pawn, and the subsequent Simplification, which enhances White's Mobile Isolani).

Beneath the ChessFlash viewer, you'll find my analysis of the position featured in Point Count Chess:
  1. PCC, p.109, No.75, before 1...cxd4
  2. Result of the Mobile Isolani (2 of 2).
  3. Summary of the Mobile Isolani (2 of 2).
  4. PGN

The Mobile Isolani (2 of 2)
My Analysis

Position #1, My Analysis
PCC, p.109, No.75, before 1...cxd4

Point Count Chess - IE - Diagram 75 - Page 109
Before: 1...cxd4

1. How White incurs the Isolated d-Pawn

Point Count Chess - IE - Diagram 75 - The Isolated Pawn, The Mobile Isolani (2 of 2), Before 1...cxd4
The Isolated Pawn,
The Mobile Isolani (2 of 2),
Before 1...cxd4
Before 1...cxd4, we see the familiar tension between Black's c5-Pawn and White's d4-Pawn, as also seen in No.74, just before Black forced the exchange of Pawns, on d4, to leave White's e3-Pawn Isolated on the d-file, as it completes the trade.

Note: White's light-Bishop (Bc4) has Black's f7-Pawn Pinned against its Kingside Castled King, in much the same way as in No.74.
Point Count Chess - IE - Diagram 75 - The Isolated Pawn, The Mobile Isolani (2 of 2), After 1...cxd4 2.exd4
The Isolated Pawn,
The Mobile Isolani (2 of 2),
After 1...cxd4 2.exd4
After 1...cxd4 2.exd4, White's e-Pawn becomes the Isolated Pawn, on the d-file, as it completes the Pawn exchange on d4, forced by Black (1...c5xd4 2.e3xd4).

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The Result of the Mobile Isolani (2 of 2)...

2. The benefits of White's Isolated d5-Pawn

Point Count Chess - IE - Diagram 75 - (RESULT) The Isolated Pawn, The Mobile Isolani (2 of 2), After 2.exd4 Nf6
(RESULT) The Isolated Pawn,
The Mobile Isolani (2 of 2),
After 2.exd4 Nf6
After 2.exd4 Nf6, White's Isolated d-Pawn has a couple of things going for it:
  • it's a Passed Pawn

  • it's less vulnerable due to the lack of enemy Pawns on adjacent file, and can be supported from the rear, by one of White's Rooks.
Black's Knight (2...Nd7-f6) serves to create a sort of invisible Blockade against White's Isolated d5-Pawn, which is prevented from advancing through the d5-square, by Black's Nf6.
H&M-S say: "The recapture with the pawn, on the contrary, confronts Black with a passed pawn; even though it be isolated, Black will have to move dexterously to paralyze it."

3. White's focus switches to capturing Black's Pinned f7-Pawn

Point Count Chess - IE - Diagram 75 - (RESULT) The Isolated Pawn, The Mobile Isolani (2 of 2), After 3.Rfe1 Qd6
(RESULT) The Isolated Pawn,
The Mobile Isolani (2 of 2),
After 3.Rfe1 Qd6
After 3.Rfe1 Qd6, White's King Rook (3.Rf1-e1) increases pressure on Black's Pinned f7-Pawn, by forcing away one of its defenders (Black's Queen).

Black's Queen counters by turning escape from White's Re1, into both an additional Blockade and an Attack on White's Isolated d5-Pawn (3...Qe7-d6).
Black has, so far, completed ⅔ of Nimzovich's formula for dealing with an opponent's Isolated Pawn (1. Blockade;
2. Attack; 3. Destroy!
).
Point Count Chess - IE - Diagram 75 - (RESULT) The Isolated Pawn, The Mobile Isolani (2 of 2), After 4.Ne5 b5 5.Bb3
(RESULT) The Isolated Pawn,
The Mobile Isolani (2 of 2),
After 4.Ne5 b5 5.Bb3
After 4.Ne5 b5 5.Bb3, White's Nf3 moves up to coordinate an attack on Black's Pinned f7-Pawn (4.Nf3-e5), along with White's Bc4.

Despite Black's b-Pawn trying to force White's Bc4 to flee (4...b7-b5), White's light-Bishop maintains its coordinated attack on Black's Pinned f7-Pawn, simply by stepping back, but remaining on the a2-g8 diagonal (5.Bc4-b3).
Point Count Chess - IE - Diagram 75 - (RESULT) The Isolated Pawn, The Mobile Isolani (2 of 2), After 5...Bb7 6.Nxf7
(RESULT) The Isolated Pawn,
The Mobile Isolani (2 of 2),
After 5...Bb7 6.Nxf7
After 5...Bb7 6.Nxf7, White's Knight captures Black's Pinned f7-Pawn (6.Ne5xf7).
Regarding Black's fianchetto of his light-Bishop (5...Bc8-b7), it's apparently another maneuver to Blockade White's Isolated d5-Pawn. However, Black didn't take into account White's coordinated attack on his Pinned f7-Pawn, and the subsequent loss of material that will result.

4. After Simplification, White is able to resume the advance of his Isolated, yet Passed d-Pawn.

Point Count Chess - IE - Diagram 75 - (RESULT) The Isolated Pawn, The Mobile Isolani (2 of 2), After 6...Rxf7 to 9...Nxd7
(RESULT) The Isolated Pawn,
The Mobile Isolani (2 of 2),
After 6...Rxf7 to 9...Nxd7
After 6...Rxf7 to 9...Nxd7, the capture of Black's f7-Pawn, by White's Knight, leads to a string of further exchanges, as White gets to Simplify the position. This benefits White's Isolated, yet Passed d5-Pawn, as there are fewer Black threats on the board.
Point Count Chess - IE - Diagram 75 - (RESULT) The Isolated Pawn, The Mobile Isolani (2 of 2), After 10.Rc7 and 11.Rec1
(RESULT) The Isolated Pawn,
The Mobile Isolani (2 of 2),
After 10.Rc7 » 11.Rec1
After 10.Rc7 » 11.Rec1, White's Rook Battery (10.Rc1-c7 » 11.Re1-c1) helps to Pin Black's Nd7, which would enable White to use his Isolated Pawn ...

White's Mobile Isolani can be pushed further up the board, and either White will be able to force it through to gain Promotion, or Black will resign, unable to deal with the loss of his Bishop and Rook (e.g. 12.Rc7xc8 Ra8xc8 13.Rc1xc8, leaving Black with Knight vs. Rook, plus the threat from White's Passed Pawn).

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Summary of the Mobile Isolani (2 of 2)...

  1. White incurs the Isolated d-Pawn. After familiar tension between Black's c5-Pawn and White's d4-Pawn, White's e-Pawn becomes the Isolated Pawn, on the d-file, as it completes the Pawn exchange on d4, forced by Black (1...c5xd4 2.e3xd4).

  2. The benefits of White's Isolated d5-Pawn is it's a Passed Pawn that Black will find challenging to paralyze.

  3. White's focus switches to capturing Black's Pinned f7-Pawn. Even before White incurred his Isolated Pawn, White's light-Bishop (Bc4) had Pinned Black's f7-Pawn, against its King. However, once White's e-Pawn becomes Isolated on the d-file, White's attention turns to Black's weakness. First, White's King Rook removes a key defender of the f7-Pawn (Black's Queen is forced to flee, after 3.Rf1-e1); then White's Nf3 coordinates with the Bc4 (4.Nf3-e5), to attack Black's paralyzed f7-Pawn. After avoiding the attack by Black's b-Pawn (4...b7-b5), White's light-Bishop (5.Bc4-b3) supports the Ne5, as it captures Black's Pinned f7-Pawn (6.Ne5xf7).

  4. After Simplification (6...Rxf7 to 9...Nxd7), White's Rook Battery (10.Rc1-c7 » 11.Re1-c1) will able White to resume the advance of his Isolated, yet Passed d5-Pawn, unless of course, Black chooses to resign.

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PGN

[Event "PCC, p109 Diagram NO.75"]
[Site "?"]
[Date "1933.??.??"]
[Round "?"]
[White "Denker"]
[Black "Siff"]
[Result "*"]
[SetUp "1"]
[FEN "r1b2rk1/1p1nqppp/p7/2p5/2BP4/4PN2/P1Q2PPP/2R2RK1 b - - 0 0"]
[PlyCount "20"]

{PCC, p109 Diagram NO.75} 1... cxd4 2. exd4 Nf6 3. Rfe1 Qd6 4. Ne5 b5 5. Bb3 Bb7 6. Nxf7 Rxf7 7. Bxf7+ Kxf7 8. Qc7+ Qd7 9. Qxd7+ Nxd7 10. Rc7 Bc8 11. Rec1 *

End.

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