c46,c47 Four knights (Bc4! Italian) Discovery 1

Discoveries (theoretical novelties) in c55/c46,c47 Italian Variation, changing appraisal of its very important systems, are present in this investigation.

Summary of analysis (author's novelties are marked by symbol "AN")

1.e4 e5 2.Bc4 Nf6 3.Nc3 Nc6 4.Nf3!

Paragraph 1: 4...Ne4 5.Ne4 d5 6.Bd3 de

[Other moves lead to white’s advantage. For example: 6...Nb4 AN 7.Ng3!? e4 8.Be4 de 9.Ne4 Bg4! (9...Bf5 10.d3 (White stands better.); 9...Qe7 10.0-0 (White stands better.)) 10.0-0!? Bf3 11.Qf3 Nc2 12.Rb1 White stands better and has the attack.] 7.Be4 (with the threat Bc6!) White stands slightly better (this is a new appraisal).
chess problem diagram

I. 7...Bd6! 8.Bc6!

[White stands slightly better (this is a new appraisal).] 8....bc 9.d4 [After 9.d3 AN white stands slightly better too.] 9...ed [9...e4 10.Ne5! (After 10.Nd2!? AN white stands slightly better too.) White stands slightly better. For example: 10...c5 11.Bf4 AN (White stands slightly better.); 11.Qe2 AN (White stands slightly better.)]

A) 10.Nd4 [The move 10.Qe2 AN will be considered in paragraph 12.] 10...0-0! 11.Be3 (Tarrasch – Lasker, 1916) White stands slightly better. [After 11.Ne2!? AN white stands slightly better too.]

B) 10.Qd4 0-0!

B1) 11.Be3 AN White stands slightly better.

B2) 11.0-0 White stands slightly better.

B2a) 11...Bf5 12.Qc3 AN (After 12.c3!? AN white stands slightly better too.) 12...Be4! After 13.Re1 (with the idea 13...Re8 14.Bg5 f6! 15.Bh4, and white is ready to transfer its bishop to the square g3 in case of need) and after 13.Bg5 white stands slightly better.

B2b) 11...Re8 white stands slightly better. For example: 12.Bf4 (After 12.Bg5!? AN white stands slightly better too.) 12...Re6 AN (12...Ba6 AN 13.Rfe1 White stands slightly better.) 13.Ng5 (for example) 13...Rf6 14.Bg3 (White stands slightly better.) [or 14.Be5 Rg6 15.Ne4 (with the idea Nd6). White stands slightly better.]

B2c) 11...Bb7AN (with the idea c5) [11...h6AN 12.Bf4 (White stands slightly better.) 12...Bb7 (with the idea c5) 13.Rad1 c5 14.Qc3!? (White stands slightly better.)]. After 12.Ng5 (with the idea Ne4; with the idea Qd3; with the idea Bf4) and after 12.Bg5 (with the idea Qd3) white stands slightly better.

B2d) 11...c5! (White stands slightly better.) 12.Qe4!AN

B2d1) 12...Ba6 13.Ng5 g6 14.Qh4 h5 15.Re1 (White stands slightly better.)

B2d2) 12...Rb8! 13.Ng5! g6. After 14.Qh4 h5 15.c3 and after 14.c3!? white stands slightly better.

chess problem diagram

II. 7...Nb4

(with the idea f5). After this move white wins a pawn and stands better (this is a new appraisal) in some variants. For example: 8.a3!?AN f5 9.Bf5 Bf5 10.ab (with the idea 11.Qe2 or 11.c3). White stands slightly better.

chess problem diagram

III. 7...Ne7 8.c3!

(with the idea 8...f5 9.Bc2!). White has the possibilities of underminings (by pawns) of black’s pawn centre, that lead to seizure of centre by white’s pieces. Moreover, there are black’s weaknesses of the squares e6, f7, g6, b7, that engender white’s dangerous tactical threats. White stands better (this is a new appraisal).

chess problem diagram

IV. 7...Bd7AN

[After 7...Qf6AN 8.Qe2 white stands better (this is a new appraisal). After 7...Nd4AN 8.Ne5!? Qe7 9.0-0 white stands better (this is a new appraisal). After 7...Qd6AN 8.Qe2 f6! 9.Qb5 white stands slightly better (this is a new appraisal).] 8.d4!? [White stands slightly better (this is a new appraisal).] 8...ed! [8...f6 9.de fe 10.0-0 Bd6 11.Ng5 g6 12.Bd5 (White stands slightly better.); 8...Qe7 9.0-0 (White stands better.)] 9.Nd4 Nd4 [9...Qe7 10.0-0 White stands better.] 10.Qd4 c6 11.Bf4 Be6 12.Qe5 (White stands better.)

It should be noted, that paragraph 1 has an enormous importance for theory of 1.e4 e5 chess openings!!

The auxiliary information

The initial position of Italian variation (c55/c46,c47) arises by the following 3 methods (each method doesn’t depend on rearrangements of first, second and third white's and black’s moves).

Method 1 (“c55-method”): 1.e4 e5 2.Nf3 Nf6 3.Bc4 Nc6 (c55 two knights defence) 4.Nc3 (c55/c46,c47).

Method 2 (“c46,c47-method”): 1.e4 e5 2.Nc3 Nc6 3.Nf3 Nf6 (c46,c47 four knights game) 4.Bc4 (c55/c46,c47).

Method 3 (“c28-method”): 1.e4 e5 2.Bc4 Nc6 3.Nc3 Nf6 (c28 Vienna game) 4.Nf3 (c55/c46,c47).

Thus, each method “consists of” several different sequences of entrance moves. Here are the most well-known sequences:

(method 1:)
1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Nc3 Nxe4 5.Nxe4 d5 6.Bd3 dxe4 7.Bxe4 ;

(method 2:)
1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bc4 Nxe4 5.Nxe4 d5 6.Bd3 dxe4 7.Bxe4 ;
1.e4 e5 2.Nf3 Nf6 3.Nc3 Nc6 4.Bc4 Nxe4 5.Nxe4 d5 6.Bd3 dxe4 7.Bxe4 ;
1.e4 e5 2.Nc3 Nf6 3.Nf3 Nc6 4.Bc4 Nxe4 5.Nxe4 d5 6.Bd3 dxe4 7.Bxe4 ;
1.e4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.Bc4 Nxe4 5.Nxe4 d5 6.Bd3 dxe4 7.Bxe4 ;

(method 3:)
1.e4 e5 2.Nc3 Nf6 3.Bc4 Nc6 4.Nf3 Nxe4 5.Nxe4 d5 6.Bd3 dxe4 7.Bxe4 ;
1.e4 e5 2.Nc3 Nc6 3.Bc4 Nf6 4.Nf3 Nxe4 5.Nxe4 d5 6.Bd3 dxe4 7.Bxe4 ;
1.e4 e5 2.Bc4 Nf6 3.Nc3 Nc6 4.Nf3 Nxe4 5.Nxe4 d5 6.Bd3 dxe4 7.Bxe4 ;
1.e4 e5 2.Bc4 Nc6 3.Nc3 Nf6 4.Nf3 Nxe4 5.Nxe4 d5 6.Bd3 dxe4 7.Bxe4.



Author: Y.Bukayev

Dear reader, here you can see theoretical discoveries-bombs, that change appraisal of important opening systems. You can see email-contact of Yury V. Bukayev, the inventor, the innovator, on Contacts-page.

(c) Bukayev, Yury V. 2005; 2005-2015 (summaries)

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