[Event "Pirc analysis"]
[Site "Chesspub"]
[Date "2017.11.05"]
[Round "?"]
[White "6.Bh6 analysis"]
[Black "4...Bg7 with 5...c6"]
[Result "*"]
[EventDate "2017.11.05"]
1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be3 Bg7 5.Qd2 c6 6.Bh6 Bxh6 7.Qxh6 Qa5 {Standard although 7...e5 deserves consideration. You will find analysis on this on chesspub.} 8.Bd3 c5 9.d5 Nbd7
( 9...a6 {This is an unmentioned option aiming to push white towards a mildy different form of the familiar queenless middlegame. There is a very effective counter though and it was seeing what this was that made me investigate 9...Nbd7 a bit broader.} 10.Nf3
( 10.O-O-O! Ng4
( 10...b5 11.e5 dxe5 12.Nf3 Nbd7 13.Rhe1 {(＋/ - )} )
( 10...Nbd7 11.Nf3 Ng4 12.Qg7 Rf8 13.e5 Ngxe5 14.Nxe5 dxe5? 15.Rhe1 Qb6 16.Ne4 Nf6 17.d6 Nxe4 18.dxe7 Kxe7 19.Qxe5+ Be6 20.Bxe4 {(＋ - )} )
11.Qg7 Rf8 12.Nf3! Nd7
( 12...Nxf2?! 13.Ng5 Nxd1 14.Rxd1 Bg4 15.Nxh7 Nd7 16.Rf1 O-O-O 17.Nxf8 Rxf8 18.h3 {(＋/ - )} )
13.e5! Ndxe5 14.Nxe5 Nxe5 15.Rhe1 {(＋/ - ) With excellent compensation. Development is good for white and at some point he should have substantial possibilities to target black's not so soundly defended kingside.} )
10...c4 11.Bxc4 Qc5 12.Bd3 Qxf2+ 13.Kxf2 Ng4+ 14.Kg3 Nxh6 15.Rhe1 f6 {Prevents e5 and since a6 was played in this continuation Nb5 is not viable either. Again 16.a4 seems the way to go; although black then gets to stabilise somewhat.}
( 15...Nd7 16.e5 {Does not seem fully threatening either, meaning white again may have to try something else. For example 16.a4.} 16...Nxe5 17.Nxe5 dxe5 18.Rxe5 Bf5 19.Rae1?! Bxd3 20.cxd3 Nf5+ 21.Kf2 h5 {(=)} )
)
10.O-O-O! {Somewhat counterintuitive considering black has postured himself as if he intends to play on the queenside.}
( 10.Nf3 c4! 11.Bxc4 Qc5 12.Bd3 Qxf2+ 13.Kxf2 Ng4+ 14.Kg3 Nxh6 15.Rhe1 {Shaw 2016, p.540. Planning e5 or Nb5.} )
10...b5 {The most active and also probably the toughest response.}
( 10...a6 11.Nf3 b5
( 11...Ng4 12.Qh4 Nge5 13.Nxe5 Nxe5 14.f4 Nxd3+ 15.Rxd3 b5 16.Kb1 b4 17.Ne2 {(＋= ) to (＋/ - ) Black faces no immediate danger. Also important though are positional factors and here black has the clear worst of it.} )
12.e5 dxe5
( 12...Nxe5?! 13.Nxe5 dxe5 14.d6 Qb6
( 14...Be6 15.Be4!? b4 16.Bc6+ Bd7 17.Bxd7+ Kxd7 18.dxe7+ Ke6 19.Nb1 c4 20.Rhe1 c3
( 20...b3 21.axb3 cxb3 22.c3 Kxe7 23.Qg5 Qb6 24.f4 e4 25.Nd2 h6 26.Qe5+ Qe6 27.Qc5+ Qd6 28.Qxd6+ Kxd6 29.Nxe4+ Ke7 30.Nc5+ Kf8 31.Nxb3 {(＋/ - )} )
21.bxc3!? bxc3 22.f4 Ng4 23.f5+ Kxf5 24.Qh3 Kg5 25.Qxc3 Qxc3 26.Nxc3 f5 27.h3 Nf6 28.Rxe5 {(＋/ - )} )
( 14...Bg4 15.f3 Be6 16.Be4 b4 17.Bc6+ Bd7 18.Bxd7+ Kxd7 19.dxe7+ Ke6 20.Nb1 c4 21.Rhe1 b3 22.axb3 cxb3 23.c3 Kxe7 24.Qg5 Qb6 25.f4 {Transposes to 14...Be6.} )
( 14...Bb7 15.Qg5 Qd8
( 15...exd6!? 16.Qxf6 O-O 17.h4!? c4 18.Be4 Bxe4 19.h5! h6 20.Nxe4 Qxa2 21.hxg6 c3 22.bxc3 Qe6 23.Qh4 {(＋ - )} )
16.Qxe5 Rg8
( 16...Qxd6?? 17.Bxb5+ axb5 18.Rxd6 {(＋ - )} )
17.Be4 Nxe4 18.Nxe4 Bxe4 19.Qxe4 e6 20.d7+ Ke7 21.Qc6 c4 22.h4 {(＋/ - )} )
15.Bxg6 Be6 16.f4! O-O-O 17.dxe7 Rde8 18.Bxf7 Bxf7 19.fxe5 Nd5 20.Qh3+ Be6 21.Nxd5 {(＋ - )} )
13.Rhe1 Qc7
( 13...Qb6 14.d6 exd6 15.Ng5 Bb7 16.Be4 d5 17.Bxd5 Nxd5 18.Nxd5 Bxd5 19.Rxd5 O-O-O 20.Nxf7 Qe6 21.Nd6+ Kb8 22.Qd2 Nb6 23.Rexe5 Qf6 24.Ne4 Rxd5 25.Rxd5 Qh4 26.Re5 Rd8 27.Qg5 Qxg5+ 28.Nxg5 {(＋ - )} )
( 13...b4? 14.Nxe5 Nxe5 15.Rxe5 bxc3 16.Qg7 Rg8 17.Qxf6 {(＋/ - )} )
14.d6 exd6 15.Bxb5 Bb7 16.Bxd7+ Nxd7 17.Ng5 Nb6 18.f4 O-O-O 19.fxe5 dxe5 20.Rxd8+ Rxd8 21.Qxh7 {(＋/ - ) With pressure for white and definite black weaknesses.} )
( 10...Rb8 11.Bb5! {Positional and very strong.} 11...a6 12.Bxd7+ Bxd7 13.e5! dxe5 14.Nf3 Bg4
( 14...b5 15.Nxe5 b4?! 16.d6 bxc3? 17.Qg7 Rf8 18.dxe7 cxb2+ 19.Kb1 Kxe7 20.Rhe1 {(＋ - )} )
15.d6 Bxf3 16.gxf3 Qd8 17.Ne4 {(＋ - ) Black will almost certainly fall apart soon. He has no king safety, own play or rooks.} )
( 10...Ng4 11.Qh4 Nge5 12.f4 Nxd3+ 13.Rxd3 c4
( 13...Nb6 14.Nf3 Bd7 15.Nd2 f6 16.e5 O-O-O 17.a3!? {(＋/ - ) Black has a middlegame to look forward to that should be very much prospectless.} )
( 13...b5 14.e5 dxe5 15.d6 exd6 16.Nh3 f6 17.Rxd6 O-O 18.Rhd1 Nb6 19.a3 Bxh3 20.Qxh3 b4 21.Ne4 bxa3 22.bxa3 {(＋ - ) With quite dangerous threats for white that black seemingly has to stop in a more or less desperate manner.} )
14.Re3 b5 15.e5 dxe5 16.fxe5 Bb7 17.Nf3 O-O-O 18.a3 Nb6 19.d6! exd6 20.Ng5 Nd5 21.Nxd5 Bxd5 22.Rd1 h6 23.Rxd5 hxg5 24.Qg4+ Kb8 25.Qg3 dxe5 26.Rdxe5 Qd2+ 27.Kb1 Qd1+ 28.Ka2 Ka8 29.Re1 Qd7 30.Re7 Qd4 31.R1e5 Qb6 32.Rxf7 {(＋/ - ) With a fairly dominating position for white.} )
( 10...Nb6 11.e5 dxe5 12.Nf3 c4 13.Bxg6 fxg6 14.d6 exd6 15.Rxd6 Bd7 16.Qg7 O-O-O 17.Qxf6 {(＋/ - ) Should pose problems for black, who is not the best coordinated.} )
( 10...Ne5 11.Nf3 Nxf3 12.gxf3 Bd7 13.e5!?
( 13.Rhe1 O-O-O 14.e5 dxe5 15.Rxe5 e6 16.Bc4 exd5 17.Bxd5 Nxd5 18.Rdxd5 Bc6 19.Rxc5 Qa6 20.Qh3+ Kb8 21.Re1 {(＋= )} )
13...dxe5 14.d6 exd6 15.Qg7 Ke7 16.Bc4 Raf8 17.Rxd6 Kxd6 18.Qxf6+ Kc7 19.Nd5+ Kc8 20.Rd1 {(＋/ - ) With good activity and more than sufficient compensation for white.} )
11.Bxb5 Rb8 12.Bc6! Kd8
( 12...Qb4 13.Nf3! Qxb2+ 14.Kd2 Rb4 15.Rb1 Qa3 16.e5!? dxe5 17.Nxe5 Rd4+ 18.Nd3 Kd8 19.Nb5 Qa5+ 20.Kd1 Qxa2 21.Qc1 Nxd5 22.Rb3 {(＋= ) White should have at least slightly better chances.} )
( 12...Rxb2 13.Kxb2 Qb4+ 14.Kc1 Qxc3 15.Ne2 Qa3+ 16.Kb1 Qb4+ 17.Ka1 Qxe4 18.Nc3 Qxc2 19.Nb5 Kd8 20.Rd2 Qf5 {(＋/ - ) Black is having quite severe coordination problems.} )
13.Bxd7 Bxd7
( 13...Rxb2 14.Kxb2 Qb4+ 15.Kc1 Qxc3 16.f3 {(＋/ - ) Should be safe enough.} )
14.Nge2! {This seems like the most exact move. Directly going after b2 now is not so great and computers are already very much liking white.}
( 14.Qd2 Qb4 15.b3 Nxe4 16.Nxe4 Qxe4 17.Nf3 Qb4 18.Ng5 Qxd2+ 19.Rxd2 {(=) White may be able to apply some mild pressure somehow but black should be OK.} )
( 14.f3 Qb4 15.Nge2 Qxb2+ 16.Kd2 Qa3 17.Rb1 Rb6 18.Rhc1!?
( 18.Rb3 Qa5 19.Rhb1 g5 20.g4 Rg8 21.h4 Rg6 22.Qf8+ Be8 23.hxg5 Rxg5 24.Qh6 Rg6 25.Qh1 Nd7 {(=) It seems difficult for white to progress.} )
18...Qa5 19.Ke3 Rg8 20.h4 Bc8 21.Kf2 Ba6 22.Qf4 {(=) to (＋= ) Black should be OK.} )
14...Ng4! {With this move black might just be able to make white's task of stabilising and realising his material advantage difficult though.}
( 14...Qb4?! 15.a3! Qxb2+ 16.Kd2 Qb6 17.Rb1 Qc7 18.Rxb8+ Qxb8 19.Rb1 Qc7 20.f3!? {(＋/ - ) With positional advantage for white.} )
15.Qf4!?
( 15.Qh4 g5!?
( 15...f5 16.exf5 Qb4 17.b3 Bxf5 18.h3 Qa3+ 19.Kd2 Nf6 20.f3 Rb4 21.Qh6 Rg8 22.h4 {(＋= ) Is probably good for white as he has kept his extra pawn and has many ideas of how to kick away or nullify the effectiveness of black's pieces.} )
16.Qg3
( 16.Qxg5 Nxf2 17.e5 {(∞) Could be analysed as well.} )
16...h5!?
( 16...Ne5 17.b3 h6 18.Kb1 Qa3 19.Ka1 f5 20.f4 Nc4 21.Rb1 Nd2 22.Rbe1 fxe4 23.Nb1 Nxb1 24.Rxb1 {(＋= ) Black is in the game but white should have at least slightly better chances.} )
17.h4
( 17.h3!? Ne5
( 17...h4!? 18.hxg4 hxg3 19.Rxh8+ Be8 20.f3 {I am not totally sure about.} )
18.b3!? Qa3+ 19.Kd2 Rg8 20.h4 g4 {it looks like black has some positional grip; which may well make it difficult for white to improve his position.} )
17...Ne5 18.b3 Qa3+ 19.Kd2 g4 {Again. This is hard to asses. White is up a pawn although it is not totally obvious what he should do to break out.} )
( 15.Qg7 Kc7 16.Qxf7 Ne5 17.Qg7 Nc4 18.Rd3 Nxb2 {(∞) With definite counterplay.} )
15...f5 16.b3
( 16.h3!? g5! 17.Qxg5 Nxf2 18.exf5 {(∞) Does not look immensly clear.} )
16...h6
( 16...fxe4 17.h3 g5 18.Qg3 Qa3+ 19.Kb1 Nf6 20.Qxg5 Rg8 21.Qe3 Rxg2 22.Nf4 {(＋= ) White looks a bit better. He targets e4, has fairly good pieces and is placed solidly enough to parry active attempts by black.} )
17.Qg3
( 17.h4 {Is another direction that does look reasonably promising. To me there is some appealing simplicity in the following line though:} )
17...fxe4 18.Nxe4 Qxa2 19.Qc3 Rf8 20.f3 Nf6 21.Nxf6 Rxf6 22.Kd2 Qa6 23.Rhe1 {(＋= ) Arguably white will be more comfortable in this late middlegame. He has good centralisation and not as many weaknesses as black.} *