Owen's Defence


Owen's Defence is an uncommon chess opening defined by the moves:
By playing 1...b6, Black prepares to fianchetto the where it will participate in the battle for the. The downside of this plan is that White can occupy the centre with pawns and gain a. Moreover, 1...b6 does not prepare castling as 1...g6 does, and it is harder for Black to augment his pressure against the centre with...f5, which weakens the kingside, than it is to play the corresponding move...c5 after 1...g6. Owen's Defence accordingly has a dubious reputation. The move...b6 has been played on the first or second move by grandmasters Jonathan Speelman, Pavel Blatny, Tony Miles, Edvins Kengis, and Normunds Miezis, and International Masters Bricard and Filipovic.
Instead of fianchettoing, Black can also play his bishop to the a6–f1 diagonal.
Owen's Defence is classified as code B00 by the Encyclopaedia of Chess Openings.

History

The opening is named after the English vicar and strong 19th-century amateur chess player John Owen, an early exponent. Howard Staunton wrote in 1847 that 1.e4 b6, "which the Italians call 'Il Fianchetto di Donna,' although disapproved of by the earlier writers, may be made by the second player without harm, if followed speedily by and ."
Using his opening, Owen defeated Paul Morphy in an informal game in London, 1858. An additional game in the match featuring this opening, where Owen varied on move 5, was won by Morphy.

Theory

The theory of Owen's Defence is less developed than that of other openings. This makes it attractive to some players, since their opponents will often be ill-prepared for it and hence forced to think for themselves. GM Christian Bauer observes:
To be honest, I don't think Black can equalise as quickly with 1...b6 as he sometimes does in standard openings, and he may suffer against a well-prepared opponent. Then again, the well-prepared opponent is rare for such marginal variations as 1...b6, and in any case, with reasonable play I'm sure White can't get more than a slight advantage from the opening – a risk everyone is running as Black, aren't they?

According to MCO-15, after 2. d4 Bb7 White gets the advantage with either:
Black may also be able to transpose into forms of the Hippopotamus Defence, by playing...g6 and...Bg7, attaining a double fianchetto formation. This approach was used by GM Boris Spassky in games 12 and 16 of his 1966 World Championship match against the then World Champion Tigran Petrosian; Spassky drew both games. It had been developed and played by the Slovakian International Master Maximilian Ujtelky a few years before this.

Illustrative games

vs. Basman, British Championship 1984:

1. e4 e6 2. Nc3 b6 3. d4 Bb7 to a position more commonly reached by 1.e4 b6 2.d4 Bb7 3.Nc3 e6. 4. Bd3 Nf6 5. Nge2 c5 6. d5! a6 6...exd5 7.exd5 Nxd5 8.Nxd5 Bxd5 9.Nf4 Bc6 10.Bc4! "gives White strong pressure". 7. a4 exd5 8. exd5 Nxd5 9. Nxd5 Bxd5 10. Nf4 Be6 11. Be4 Ra7 12. 0-0 Be7 Watson and Schiller also give 12...g6 13.a5! as favoring White after 13...bxa5 14.Bd2 or 13...b5 14.Be3 d6 15.b4 Be7 16.Nxe6 fxe6 17.Qg4 Qc8 18.bxc5 dxc5 19.Bh6, intending Rad1, Rfe1, and h4–h5 "with great pressure for just a pawn". 13. Ra3 0-0 14. Rg3 f5 15. Bd5 Rf6? Better is 15...Bxd5!? 16.Qxd5+ Rf7 17.Nh5 with a strong attack. 16. Re1 Bxd5 17. Qxd5+ Rf7 18. Nh5 g6 19. Bh6 Nc6 20. Rge3 1–0 White threatens 21.Nf6+! Bxf6 22.Re8+. On 20...gxh5, 21.Rg3+ wins; 20...Bf8 21.Re8 gxh5 23.Bxf8!; 20...Ra8 21.Rxe7! Nxe7 and now either 22.Rxe7 Qxe7 23.Qxa8+ or 22.Nf6+ Kh8 23.Qxf7 wins.

Matovinsky Gambit

A pitfall for Black in this opening, the Matovinsky Gambit, dates from a game by the 17th-century Italian chess player and writer Gioachino Greco.
Greco–, 1619: 1. e4 b6 2. d4 Bb7 3. Bd3 f5? Bauer calls this move "simply suicidal". Black gravely weakens his kingside in an attempt to gain, but White can win by falling into Black's "trap". Normal is 3...e6 or 3...Nf6. Also possible is 3...g6 heading for a Hippopotamus Defence, when Martin considers 4.f4 f5! strong for Black. 4. exf5! Bxg2 5. Qh5+ g6 6. fxg6 Nf6 7. gxh7+ Nxh5 8. Bg6# 1–0
A better try for Black is 6...Bg7! Staunton wrote in 1847 that White got the advantage with 7.gxh7+ Kf8 8.hxg8=Q+ Kxg8 9.Qg4 Bxh1 10.h4 e6 11.h5. Over 120 years later, Black improved on this analysis with both 10...Qf8 11.h5 Qf6 12.h6 Rxh6 13.Bxh6 Qxh6 Hendler–Radchenko, Kiev 1970 and 10...Bd5 11.h5 Be6 12.Qg2 Rxh5 Schmit–Vitolins, Latvia 1969, winning quickly in both games. However, White is winning after 7.Qf5! Nf6 8.Bh6 Bxh6 9.gxh7 and now:
According to both Soltis and Kapitaniak, 7.gxh7+ Kf8 8.Nf3! is also strong:
Watson writes that although 7.Qf5! is the "traditional" refutation and does indeed win, "the analysis is complicated", and Spinhoven's 8.Nf3! "is clearer".

Guatemala Defence

Instead of fianchettoing, Black can proceed differently by playing his queen's bishop to a6, the Guatemala Defence, so-named because the Guatemala Chess Club used the line in a 1949 correspondence game. Andrew Soltis writes that it has "no other discernible benefit than to get out of 'book' as quickly as possible". Joel Benjamin and Eric Schiller see some logic in Black's concept to exchange the light-squared bishop as soon as possible, as it often proves troublesome for Black in many openings. White gets the advantage with 2.d4 Ba6 3.Bxa6 Nxa6 4.Nf3 Qc8!? 5.0-0 Qb7 6.Re1 e6 7.c4.
The Guatemalan bishop deployment can also occur on Black's third move, from various transpositions. For example, after 1.e4 b6 2.d4 e6, 1.e4 e6 2.d4 b6, or 1.d4 b6 2.e4 e6, Black can follow up in all cases with 3...Ba6.