On 13.b3 Black probably should play 13...Bd6 (making white to castle king side) 14.0-0 h5 (planning to weaken king side with h4-h3) 15.f5 (getting more space and making black bishop more passive) Bc8 16.Nc4 Bc5+ 17.Kh1 Rhe8 I think that this position could be playable for Black as it`s not so easy to find active plan for White while Black has plan to move  h-pawn up to h3 with Kb8(a8) Bb7 to follow.

AMM

May I ask your opinion about position after 
1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. Nc4 fxe4 5. Nc3 Qf7 6. Ne3 d5 7. Nexd5 Be6 8. Bc4 Na6 9. Bxa6 bxa6 10. Ne3 Nf6 11. f4 ? What would you suggest for Black?
   

Yes, indeed!?, sorry, 12..Nf6 is possible; anyway 12..Qg6 13.Bb2 Nf6 (or 12..Nf6 13.Bb2 Qg6) 14.Be2 Rhf8 15.Nf4 Qf7 16.Qe2 with a very small plus.

Kosten think 6..Nc6 is the most correct but after 7.d5 Ne5 8.0-0 Nxc4 9.Bxc4 Black had many problems lately with 9..Qg6 or 9..Be7, so I think retrogade 6..Qd8 or semi-unknown 6..Ne7 with idea ..d5 are better

How does black play after 1.e4 e5 2.Nf3 f5 3.Nxe5 Qf6 4.d4 d6 5.Nc4 fe4 6.Nc3 Qg6 7.f3 ?

Korch wrote on 01/01/10 at 14:52:04:



12..Nf6 is impossible, so the Queen is on "f6", so perhaps 12..Qg6 13.Rb1 (or 13.Bb2) then -both- 13..Nf6 etc.


                    And what's about Classical Main line with 3.Nxe5 Qf6 4.d4 d6 5.Nc4 fxe4 6.Nc3 Qg6 7.f3 exf3 8.Qxf3  ?. In this key position:


                    1a) 8..Nc6 9.Nb5! Bg4 10.Qc3! threating on "c7" was already pointed by Kosten. In his book there are some games with 10..Rc8, 10..0-0-0 and 10..Kd8 all dubtious for Black, but I remember strong CC player Peter Leisebein suggested 10..d5!?; now "natural" 11.Nxc7+?! Kd7 etc. had success as Black in three games, but finally was refuted in a good way in Melchor-Zielinski, corr.,LADAC thema (sf.), 2008/09 with 11.Bd3! etc. 
 
                    1b) 8..Nf6 has been totally discredited by 9.Ne3! ( instead less clear and more known 9.Bd3 ) in later games. White decides to make "g4" unavailable for exchange the Queens, and Black play is totally passive. There are many games with this moves sequence
 
                    1c) 8..Qg4!? is less known and played, buy It was reccomended by myself. Kosten only analyzes 9.Qf2 ( I don't think exchanging Queens is good for White ) 9..Nf6 10.Be2 and now instead of Kosten's 10..Qe6?! I suggest 10..Qg6!?; In this order, THERE ARE NOT ANY GAME still played ( only traspositions, so they are very important ! ). Some examples:
 
                     11.Bd3 Qh5 12.0-0 Be7 (or 12..Nc6) 

                   *13.Ne2 0-0 14.h3 Nc6 15.Nf4 Qe8 (15..Qf7) = Fleischmann-Cano, corr., 1970 by trasposition

                   *13.Be3 0-0 14.h3 (14.Qg3 Nc6 15.Rae1 Bd7=) 14..Nc6 15.Qg3 Be6 = Gaard-Müller, corr., 1988/89 by trasposition 

                   *13.Bf4 0-0 14.h3 Nc6 15.Rae1 Bd7 16.Ne3 White has more space, but Black is solid (Kosten)-- Bergsma-Wijnands, Rotterdam, 1939 by trasposition 1/2-1/2 in 60 moves)

                   *13.Bd2 0-0 14.h3 Nc6 15.Qe3 Bd7 16.Rae1 Rae8 17.Ne2 1/2-1/2 Hewitt-Thornton, 1998, also by trasposition.

                   *13.Bd2 0-0 14.h3 Nc6 15.Rae1 Bd7 followed by ..Rae8 = Knostenbergs-Melchor, corr., 2001/02 (1/2-1/2 in 31 moves)

                    White can try15.Ne3 or Qg3, but they may be met by15..d5.

                    So perhaps White has to try for an improvement earlier. Ideas?, maybe 13.Nb5!?; 11.Ne3!?


                    Last times many players - as I myself - have tested 7..Be7!? to re-evaluate whole variation. Although we have got nice positions after 8.fxe4 Nh6! - or 8..Nc6 and 9..Nh6 -, I'm not sure about it if White plays 8.Nxe4 or 8.Ne3!?