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Control of a Useful Open File
The Doubled Rooks (2 of 2)

Point Count Chess, NO. 161A to NO. 161B, p231-232
Denker v. Polland, 1933

This example of the Doubled Rooks begins with the e-file already Open (this is the "useful" Open file).

Beneath the ChessFlash viewer, you'll find my analysis of the two positions featured in Point Count Chess:
  1. PCC, p.231, No. 161A, before 1.Qc3
  2. PCC, p.232, No. 161B, after 11...Nh6
  3. Result of the Doubled Rooks (2 of 2).
  4. PGN

The Doubled Rooks (2 of 2)
My Analysis

Position #1, My Analysis
PCC, p.231, No. 161A, before 1.Qc3

Point Count Chess - IE - Diagram 161A - Page 231
Before: 1.Qc3

H&M-S suggest that White's Ne5-Outpost, and its attack on Black's d6-Pawn, prevents Black from leaping to occupy, and thus control, the Open e-file, with his Rooks -- at present, the Rd8 is the only Piece preventing, or at least stalling, the capture of the d6-Pawn.

Point Count Chess - IE - Diagram 161A - Control of a Useful Open File, After 1.Qc3
Control of a Useful Open File,
The Doubled Rooks (2 of 2),
After 1.Qc3
After 1.Qc3, White's Queen occupies the long, a1-h8 diagonal (1.Qf3-c3), and is in position for her eventual mating attack, up in Black's Kingside corner (18.Qc3-h8#).

Attacking the a5-Pawn, as well, White's Qc3 also ties down another Black Piece (Queen Rook), which is subsequently tasked with defending the a5-Pawn.
Point Count Chess - IE - Diagram 161A - Control of a Useful Open File, After 2.Re1, 3.Re2 and 4.Rae1
Control of a Useful Open File,
The Doubled Rooks (2 of 2),
After 2.Re1 » 3.Re2 » 4.Rae1
After 2.Re1 » 3.Re2 » 4.Rae1, White mobilizes both Rooks, doubling them onto the Open e-file, into a Battery formation.

White now has "Control of a Useful Open File."
Point Count Chess - IE - Diagram 161A - Control of a Useful Open File, After 5.Kf2 to 10.g4
Control of a Useful Open File,
The Doubled Rooks (2 of 2),
After 5.Kf2 to 10.g4
After 5.Kf2 to 10.g4, White mobilizes his King, as he advances his Kingside Pawns into an attack against Black's Pawns.

White's goal appears to be to fully Open the h-file (another "useful" Open File).

The position of White's King (Kg2) is important, as it keeps Black's Nf5 from getting in behind enemy lines (...Nf5-g3).
Point Count Chess - IE - Diagram 161A - Control of a Useful Open File, After 10...hxg4 11.hxg4
Control of a Useful Open File,
The Doubled Rooks (2 of 2),
After 10...hxg4 11.hxg4
After 10...hxg4 11.hxg4, the h-file becomes fully Open, as the two adverse h-Pawns trade across onto the g-file (10...h5xg4 11.h3xg4). Note how the position of White's Kg2 gives White the option of moving his Re1 across to occupy the Open h-file (Re1-h1).

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Position #2, My Analysis
PCC, p.232, No. 161B, after 11...Nh6

After: 1.Qc3 Ra8 2.Re1 Qd7 3.Re2 h5 4.Rae1 Nf5 5.Kf2 Rab8 6.Re4 Ra8 7.Kf3 Rab8 8.h3 Nd4%2B 9.Kg2 Nf5 10.g4 hxg4 11.hxg4 Nh6

Point Count Chess - IE - Diagram 161B - Page 232
After: 11...Nh6
Point Count Chess - IE - Diagram 161B - Control of a Useful Open File, After 12.f5
Control of a Useful Open File,
The Doubled Rooks (2 of 2),
After 12.f5
After 12.f5, White gains a second Advanced Chain (g4,f5).

H&M-S suggest that this more about preventing Black's Queen attack on White's King (...Qd7xg4+), and the ramifications that would bring.

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The Result of the Doubled Rooks (2 of 2)...

Point Count Chess - IE - Diagram 161A to 161B - Control of a Useful Open File, The Doubled Pawns (2 of 2), After 12.f5
(RESULT) Control of a Useful Open File, The Doubled Rooks (2 of 2),
After 12.f5
After 12.f5, White's Doubled Rooks team-up on the "useful" Open e-file, to prevent Black's Major Pieces from coming across to help defend the ever-worsening position of their King (Kg8).
Point Count Chess - IE - Diagram 161A to 161B - Control of a Useful Open File, The Doubled Pawns (2 of 2), After 12.f5
(RESULT) Control of a Useful Open File, The Doubled Rooks (2 of 2),
After 12.f5
After 12.f5, it must also be noted that all the credit cannot solely go to White's Doubled Rooks. Sharing the credit are:

White's Ne5-Outpost, which causes Black to spend a Piece to defend the d6-Pawn, thus reducing firepower over on the Kingside -- White stands to gain a Protected Passed Pawn (d5), with the removal of Black's d6-Pawn.

... and ...

White's Pawn structure, which all combine to restrict Black's Pieces, as White builds up toward his mating attack.

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PGN

[Event "PCC, p231-232 Diagram NO. 161A to NO. 161B"]
[Site "?"]
[Date "1933.??.??"]
[Round "?"]
[White "Denker"]
[Black "Polland"]
[Result "1-0"]
[SetUp "1"]
[FEN "1r1r2k1/1q3pnp/3p2p1/pNpP4/P1P2P2/5QP1/7P/R2R2K1 w - - 0 0"]
[PlyCount "35"]

{PCC, p231 Diagram NO.161A} 1. Qc3 Ra8 2. Re1 Qd7 3. Re2 h5 4. Rae1 Nf5 5. Kf2 Rab8 6. Re4 Ra8 7. Kf3 Rab8 8. h3 Nd4+ 9. Kg2 Nf5 10. g4 hxg4 11. hxg4 Nh6 {PCC, p232 Diagram NO.161B} 12. f5 Re8 13. Nxd6 Rxe4 14. Nxe4 Qxa4 15. Nf6+ Kf8 16. g5 Nxf5 17. Nd7+ Qxd7 18. Qh8# 1-0

End.

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