This article concludes the "II" sub-series, which concerns a game where I was rated 1270 USCF and was Black against Pat Regan (1291) in the Edison (New Jersey, USA) First Sunday of the Month Quad on 7 April 1974.
Part B left off at the following position, in which Black has just played 15...Rxf4.
Although this series focuses on decisions faced by me rather than by my opponent, let's consider where White should castle. White's advanced pawns on the queenside give her a space advantage there, making that the wing where White might want to open at least one file. This suggests castling kingside so as to keep the queenside files available to White's rooks.
Although a kingside file (the f-file) is also open, White rook's could deploy to that file irrespective of where White castled.
It might seem risky to castle kingside, where White has so many holes. However, the pawn structure denies Black's minor pieces a way to invade White's kingside. Black's dark-square bishop is imprisoned by Black's pawns, Black's light-square bishop is denied entry by White's pawns, and Black's knight presently has no viable path to f4 or h4. Moreover, castling kingside would enable White's king to help control the many holes in that sector.
If Black is to make progress on the kingside, it will therefore be necessary to create pawn tension there. Being that Black's h-pawn is his only kingside pawn that isn't jammed against another pawn, the move ...h5 would be Black's only possibly feasible kingside pawn break.
A possible continuation starting with 16. O-O is given in the following chess movie.
FEN
r1b3k1/pppn3p/3p2pb/3Pp1p1/2P1PrP1/2N2N1P/PP2B3/R3K2R w KQ - - -
[fen "r1b3k1/pppn3p/3p2pb/3Pp1p1/2P1PrP1/2N2N1P/PP2B3/R3K2R w KQ - - -"] 16. O-O Nf6 {Posting the knight here supports the g4 and h5 squares, whereas posting the knight at c5 would not.} 17. Nd2 {Black's next is better than 17...Bd7 because answering Nb5... by ...Bxb5 would give up a piece that could have attacked the g4-square.} a6 {Now 18. Bf3 Bg7 19. Ne2 would be met by 19...h5 20. Nxf4 exf4 (Avoiding an isolated h-pawn.) 21. gxh5 gxh5 22. Bg2 Bh6 (Defending f4 in order to play ...g4), with ample compensation.} 18. Kg2 Bg7 19. Nd1 {Redeploying to where this piece can help protect g4. If now 19...Rxf1, then 20. Kxf1, and after 20...h5 21. Ne3, White's g-pawn would be adequately protected.} h5 {White's e-pawn would seem underdefended, but 19...Nxe4 would lose material to 20. Rxf4, a tactic that White soon relies on to prevent losing the g-pawn.} 20. Ne3 {The g-pawn is immune: 20...hxg4 21. hxg4 Nxg4 (Intending 22. Rxf4 Nxe3+ followed by recapturing the rook.) 22. Bxg4 Bxg4 23. Rxf4, followed by Nxg4...} Bd7 21. Rf2 {If now 21...Nxe4 22. Rxf4 exf4 23. Nxe4 fxe3, then 24. gxh5 Bxb2 25. Rb1 Bd4 26. Rxb7 (with activity for the pawn), and trapping the rook by 26...Bb6 would lose a piece after 27. Nf6+.} Raf8 {This would enable Black to recapture at f4 with a rook in some of the above lines. White therefore doubles rooks so that the Black rook recapturing at f4 could also be exchanged.} 22. Raf1 {White is under pressure but seems to be holding.} Nxe4 {This is now tactically playable, but would it win for Black?} 23. Rxf4 Rxf4 24. Rxf4 exf4 25. Nxe4 fxe3 {Being that White no longer has a rook to go to b1, 26...Bxb2 is a genuine threat.} 26. b3 {Black's many weak pawns and the lack of a means for activating his king make winning problematic.}
White actually played 16. O-O-O, and the game continued as depicted in the following chess movie.
FEN
r1b3k1/pppn3p/3p2pb/3Pp1p1/2P1PrP1/2N2N1P/PP2B3/R3K2R w KQ - - -
[fen "r1b3k1/pppn3p/3p2pb/3Pp1p1/2P1PrP1/2N2N1P/PP2B3/R3K2R w KQ - - -"] 16. O-O-O Nc5 {A superficially good square where the knight can't really accomplish anything. Black should prepare ...h5 as in the earlier chess movie.} 17. Nd2 a5 {To prevent 18. b4, which would displace Black's knight.} 18. Rdf1 Bd7 19. Kb1 {This makes the c1-square available to a White rook, should the c-file open.} c6 {This pawn break has the benefit that 20. dxc6 would cede control of e6 and soon permit Black's knight to use that square to reach d4 or f4, although it's unclear how Black would then proceed.} 20. Rf3 {This gives the rook mobility along the third rank, which could be useful if White's c3-knight were to move.}
In the position reached in the above chess movie,
what would be the consequences of Black's 20...cxd5 and White's replying 21. cxd5 (to maintain control of the e6-square)?
We can discern some of them by comparing the pawn structure just before 20...cxd5,
with that arising from 21. cxd5:
This shows us that the pawn exchange opened the c-file, opened the a4/e8 diagonal, vacated the c6-square (which each side presently controls with a pawn), and vacated the c4-square (which neither side presently controls with a pawn).
Returning to the position that would arise from 21. cxd5,
Could either side exploit any of these now-open lines or squares?
A White knight would stand well at c4, where it would control the a5-square (where Black's pawn would be pressured), the b6-square (which is a hole), and the d6-square (which is occupied by an unprotected pawn). To free this knight from protecting e4, White could trade rooks first (so that White's e-pawn would be adequately protected even after one of White's knights leaves its post).
Therefore, Black shouldn't exchange at d5 unless he can subsequently keep White's knight out of c4, such as by playing ...b5. This suggests (after 20. Rf3) the move 20...Rb8, intending 21...cxd5 22. cxd5 b5 (because the pawn would now be adequately protected).
Black actually played 20...cxd5, and the continuation (starting with 20. Rf3) is shown in the next chess movie.
FEN
r5k1/1p1b3p/2pp2pb/p1nPp1p1/2P1PrP1/2N4P/PP1NB3/1K3R1R w - - - -
[fen "r5k1/1p1b3p/2pp2pb/p1nPp1p1/2P1PrP1/2N4P/PP1NB3/1K3R1R w - - - -"] 20. Rf3 cxd5 {Intending 21. Nxd5 Rxf3 (21...Nxe4, intending 22. Nxf4 Nxd2+ would lose to 22. Nxe4 Rxe4 23. Nf6+.) 22. Bxf3 Rf8, with some pressure.} 21. cxd5 Rb8 {A good idea, but as noted above, ...Rb8 should have preceded exchanging at d5.} 22. Rxf4 gxf4 23. Nc4 {Now 23...b5 gives Black great activity after 24. Nxd6 b4 (Intending 25. Ncb5 f3 [Forcing the bishop to block the c-file or first rank.] 26. Bc4 Bf8, threatening 27...Rb6.) 25. Nd1 Bf8.} Bf8 {This move suggests a mindset of futilely reacting to threats, which isn't likely to end well.} 24. Nxa5 {With Black's a-pawn gone, his knight will be prone to attack by b4... Black might now try to activate the dark-square bishop by ...Be7 and ...Bd8.} b6 {This creates a weakening that White immediately exploits.} 25. Nc6 Bxc6 26. dxc6 Rc8 27. Bc4+ Kg7 28. b4 {Winning a piece and ultimately the game. 28...Rxc6, intending 29. bxc5 Rxc5, regaining the piece, would be met by 29. Bd5 (avoiding the skewer) and then taking the knight.}
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For all these years, I'd been wondering how Black should have conducted this game after winning a pawn in the opening. But I feel that I understand this much better from having done the analysis that went into preparing parts II-A through II-C of this sub-series. I hope that readers feel that they also have gained.
(A list of the threads I've initiated at this forum is available at http://www.davidlevinchess.com/chess/RHP_my_threads.htm .)
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