Good evening.
Confused_by_Theory wrote on 11/21/17 at 12:28:05:
These h3+f4 systems somewhat attract me as well although Marin's:
1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be3 c6 5.h3 Nbd7 6.f4 e5
Is a bit of a nut to try and crack. Just checking one of Marin's presumably more important lines though:
7.Qf3 b5 8.0-0-0 b4! (Marin)
I wonder if white can not throw a bit of caution out in search of positional gain (open d-line) with the move:
9.dxe5!?
9.Na4 and 9.Nce2 are the only moves covered by Marin.
Instead now there are two lines 9...dxe5 10.Na4 when probably white has improved a bit compared with the immediate 9.Na4 (I think it looked fairly nice compared to the other line at least) ...
Fairly obvious move order issue spotted. Possibly it is not so bad, although if it works it is a bit sad because long castling seems very natural (as it always is
).
1.e4 d6 2.d4 Nf6 3.Nc3 4.Be3 c6 5.h3 Nbd7 6.f4 e5 7.Qf3 b5 8.0-0-0 exf48...b4! (Marin)
9.Bxf49.Qxf4 b4 10.Nb1 Qa5 11.Bc4 d5 12.exd5 cxd5 13.Bb3 Be7 (=) Black does not look to have many problems.
9.e5?! fxe3 10.exf6 Nxf6 11.Bxb5 cxb5 12.Qxa8 Bh6 (=+) to (-/+) Black has quite good compensation since white will have terrible difficulties coordinating.
9...b4 10.Na4 Qa5Transposes back into Marin's line.
Instead there are two more knight moves: 10.Nce2 (which does not quite transpose to Marin's 8...b4 9.Nce2 Qe7) and 10.Nb1. The first does not look advantageous for white, the second is probably the best attempt.
1.e4 d6 2.d4 Nf6 3.Nc3 4.Be3 c6 5.h3 Nbd7 6.f4 e5 7.Qf3 b5 8.0-0-0 exf4 9.Bxf4 b4 10.Nce2 Qe7!?10...Bb7 is more positionally optimistic but could also be alright.
11.e511.g4 Qxe4 12.Qf2!? Qe7 13.Bg2 Nd5 (=) I find hard to see as problematic for black even if white definitely has full compensation.
11...dxe5! 12.Qxc6 exf4 13.Qxa8 Nb6 14.Qc6+ Bd7 15.Qc715.Qb7 Bh6 16.Nf3 0-0 17.Kb1 Nfd5 (=) With enough positional compensation for the exchange.
15...Nfd515...Qd6 16.Qxd6 Bxd6 17.Nf3 Nfd5 is also not obviously better for white.
16.Qb8+ Bc8 17.Nf3 Bg7!? (∞) White lacks the really natural moves to improve his position so black should have at least decent compensation.
1.e4 d6 2.d4 Nf6 3.Nc3 4.Be3 c6 5.h3 Nbd7 6.f4 e5 7.Qf3 b5 8.0-0-0 exf4 9.Bxf4 b4 10.Nb1 Be7!?This looks a bit like it is asking for Bh6 at some point and black does not exactly need to play it right here. It is not obvious to me how black gets on with playing his position if he doesn't go here at some point though, Bg7 drops d6 and making moves with just other pieces looks to only get black so far.
11.Nd2 0-0White now needs to prove he has something, even if it looks like he has the more pleasant position.
Have a nice day.