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Frisco Del Rosario writes about chess960, women's basketball, minor league baseball, unsupported collectible card games, lettering in comic books, and Golden Age movies

Bronstein Gambits accepted and declined leading to the same tactical motif at the CalChess senior championship 02/13/2017

The boom in kiddie chess gave us old-timers a greater appreciation for the CalChess Senior State Championship: the age requirement meant we had old stories to share with our opponents, when most weekend tournaments these days pit an adult against three or five children.

In the late ‘70s, Sonoma County organizer Thomas Boyd commemorated a joyous event — the birth of a daughter — with an occasion of chess volunteer work: Boyd named his chess tournament the Cynthia Ann Quads. For many years following, people told Boyd they remembered playing in the Cynthia Ann Quads — these days, can anyone tell one MegaFrankenSwi$$ Open from another?

5…Nc6 compelled 6. d5 before Black could play …e7-e5 to prepare the comfortable retreat …Nc6-e7. 6. d5 Ne5 7. f4 Ng6 crammed Black’s pieces into a tight spot, then Black invested a huge chunk of time — 8…Bg4 plus 9…Bxf3, 10…e5, 11…fxe6, 12…Nd7, 13…e5, 14…Nf4 plus 15…exf4 — to make an outpost on e5 for his knight. By that time, White was fully developed with 16. O-O-O, and Black shied away from 16…Ne5 for the looks of 17. Bh5+ g6 18. fxg6 hxg6 19. Bxg6+ Nxg6 20. Rxg6 Qd7 21. Nd5 O-O-O 22. Qd4. But 16…Nf6 17. Qxf4 Qe7 enabled White to open the position by 18. e5 dxe5 19. Qa4+, and then the self-pin 19…Nd7 ran into the crossfire 20. f6! gxf6 21. Bh5+ Kd8 22. Bg4.

Curiously, I got to play 1. d4 Nf6 g4 with both of my white games at the 2017 CalChess Senior State Championship, and the winning scheme in each case was a bishop check to push the black king to d8, pinning a knight on d7 to death. The curious aspect was that Black took the gambit in round one, and refused in round three — tactical patterns in the middlegame are usually very different depending on whether an opening pawn sacrifice goes accepted or declined.

Black was one of those opponents whose computers won the post-mortem by exposing the warts in White’s unsound opening play. They seem to think that gambit players would be surprised to learn that their opening moves are an unsound proposition, and change their speculative ways, consequently.

An original position arose from 3…Ng8, a Benoni formation where White is gifted with the space gained from g2-g4-g5, while Black’s kingside pieces are restrained. The g-pawn advance also came in handy to enable the bishop development 9. Bg2 — White blocked the f1-a6 diagonal with 7. Nge2 to fight the c8-bishop — if Black chose to develop …Bc8-f5, then White had Ne2-g3 in store; while …Bc8-g4 could fetch f2-f3 if appropriate. 13…Bxe4? was a mistake, bringing 14. Bxe4 forward with a threat (Black was better suited by 13…hxg5 14. Bxg5 Be5 with …Ng8-f6-g4 to follow). Instead, 16…Be5 met the intuitive line-opening sacrifice 17. Rxe5!, after which 20. Bf5 crippled both black knights, and 21. Qd5 made for a winning coordination on the white squares.

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