[d]r1q2rk1/pb2bp1p/4p1p1/1p1pP1Pn/2pP4/P1P1P2Q/1PBN3P/R1B2RK1 w - - 0 17Lyudmil Tsvetkov wrote:If you/SF is able to take back moves, I should be able to do the same, I guess.
In your line, e4 instead of Rg1 seems to be much better:
[d]1rr2bk1/3q3p/4pRp1/p2pP1P1/2pPP3/P1P3RQ/3B3P/3bN2K b - - 0 5
Maybe, black will be able to draw, I don't know.
To remind the whole move order:
17. Rf6 Qd8 18. Nf3 a5 19. Bd2 b4 20. Kh1 Bc6 21. Rg1 bxa3 22. bxa3 Rb8 23. Ne1 Qd7 24. Bd1 Ng7 25. Qh6 Ba4 26. Bg4 Rfc8 27. Rg3 Nh5 28. Bxh5 Bf8 29. Bxg6 fxg6 30. Qh3 Bd1 31. e4
Stockfish is optimistic to hold the position or even to win it after 31.e4:
[d]1rr2bk1/3q3p/4pRp1/p2pP1P1/2pPP3/P1P3RQ/3B3P/3bN2K b - - 0 31
Code: Select all
48/85 1:03:24 139.396.477k 36.644k +2,22 31. ... dxe4 32.Rg2 Bxa3 33.Rgf2 Bh5 34.Kg2 Rb1 35.Qe3 Bg4 36.Qxe4 Qb7 37.Qxb7 Rxb7 38.Nc2 Be7 39.R6f4 Bf5 40.Ne3 Bxg5 41.Nxf5 gxf5 42.R4f3 Bxd2 43.Rxd2 a4 44.d5 a3 45.Rff2 exd5 46.Rxd5 Ra8 47.Ra2 Rb3 48.e6 Rxc3 49.e7 Re8 50.Ra5 Rxe7 51.R5xa3 Rxa3 52.Rxa3 Kf7 53.Kf3 Kf6 54.Ra2 c3 55.Rc2 Rc7 56.Kf4 h6 57.h3 Ke6 58.Ke3 Ke5 59.Kd3 f4 60.Rxc3
So far I have not claimed anything, have I?Lyudmil Tsvetkov wrote:I don't know what you want to claim, that Rf6 does not win?
Certainly it does, I am just too tired now and extremely busy to do careful analysis of alternative lines.
It's an very interesting and highly complex position. Rf6 is the best move and gives white advantage, but whether this advantage is enough to win is still not quite clear. Right now I would say white has good winning chances.
I'll take again a closer look at this position.Lyudmil Tsvetkov wrote:Btw., after Rf6 Qd8 Nf1 Nf6 gf6 Bf6 ef6 Qf6, did you check with longer search all the lines:
[d]r4rk1/pb3p1p/4pqp1/1p1p4/2pP4/P1P1P2Q/1PB4P/R1B2NK1 w - - 0 5
I guess this is won for white, but you will need 30-40 moves until the score changes.
I myself tried this with SF and it starts winning after 30-40 moves.
From my experience drawn from different databases and top engine games, 2 minor pieces vs rook + 2 pawns, when the 2 minors also have the bishop pair is won for the minor side, in maybe at least 90% of cases, so, I suggest you
check more carefully/maybe play some games to get convinced.
As I said before, it's a very complex position.Lyudmil Tsvetkov wrote:Alternatively, white has also Bd1 instead of Nf1:
[d]r2q1rk1/pb2bp1p/4pRp1/1p1pP1Pn/2pP4/P1P1P2Q/1P1N3P/R1BB2K1 b - - 0 2
This should also be investigated closely.
I am fully certain Rf6 wins, and maybe other moves too.
I just don't have even couple of minutes time now to give just this position.
It is a pity all the most beautiful lines are not evident from what SF chooses.
There are really some very intriguing variations here, if SF accepts the sacrifice.
Pity I don't have more time.
The white attack looks very dangerous. But black also has defense resources and counterplay on the queenside.
The whole thread has become quite confusing and it is becoming more and more difficult to follow the postings and analyses.
Maybe I have the time for a summary of our analyses.