Lyudmil, if we want to talk about certain positions, moves and lines, I need one thing:Lyudmil Tsvetkov wrote:I will look further into your other line, but to see how propensive to different fortress/positional draws the position is, just let me mention a very easy draw I missed in the real game continuation after black's g5:
Move- numbers.
A diagram is useful, if you don't have a GUI in which you anyhow have the virtual board according to the moves, if the line and the move- number is right.
I don't need diagrams, if I have a board and a move- list with move- numbers.
I'm more used to read notations without board but to play with diagrams only.
So please give move- lists, if we talk about lines we both know quite well after some postings, they don't have to be from the very starting position, just always only as long as the last deviation is away, but even if it's about single moves, give a move- number according to the move, then I don't need so much diagrams, as useful as they are (or could be) as we have seen lately too.
Now for the examples of drawn positions and fortresses you give:
I know quite well, that White has good chances to build up a fortress here, but only if Black doesn's prevent from that, Black has to blunder, to let a white fortress happen, as I said, there is a principle in the planning and playing of Black, see here.
http://www.talkchess.com/forum/viewtopi ... 14&t=56059
Now, let's talk about the positions and the lines according to this thread, not about any other games you played or wanted to play. And if you start your posting withpeter wrote:The principle: to prevent White's fortress the black King goes Queenside, threatening to support the re- exchange of the qualtiy against the white a-Pawn, to hold against that White has to come with the Rook and in some lines even with the King to the Qeenside too and that than opens the way for the black g-Pawn to march again, if it is on g3 the way for a black Rook over g4 is open.
“I will look further into your other line”, please do so, before we go on talking.
Having looked for some alternatives for both sides interactively, I can show an even shorter Black winning main line here to you, maybe it does make it clearer to be understood, how this works for Black: (as a matter of fact, I can show you quite a .pgn already as well, but I don't want to lose your interest
1.c4 e5 2.Nc3 Nf6 3.e4 Bc5 4.Be2 d6 5.Nf3 Nc6 6.0–0 0–0 7.d3 a5 8.Bg5 h6 9.Bd2 Bg4 10.h3 Bxf3 11.Bxf3 Nd4 12.g3 c6 13.Bg2 b5 14.Kh1 b4 15.Ne2 Qe7 16.Nxd4 Bxd4 17.Rb1 Nd7 18.Qe2 Rab8 19.f4 exf4 20.gxf4 Nc5 21.b3 Rb6 22.Qf3 Ra6 23.Qg3 Qf6 24.Rbd1 Re8 25.Be1 Nd7 26.Bf3 c5 27.Bg4 Nf8 28.Rb1 a4 29.Bd1 axb3 30.Bxb3 Rea8 31.Qh4 Ne6 32.Qxf6 Bxf6 33.Kg2 Nd4 34.Bf2 Ne2 35.Be1 Bc3 36.Rf2 Nd4 37.Bxc3 bxc3 38.Rc1 c2 39.h4 g6 40.Rcxc2 Nxc2 41.Rxc2
41...Kf8 42.Kf3 Ke7 43.Rg2 Rg8 44.Ke3 f6 45.Rh2 Ra5 46.Kf3 Raa8 47.Rh1 h5 48.Ke3 Rh8 49.Rh2 g5 50.Bd1 g4 51.f5 Ra3 52.Bb3 Kd7 53.Kf4 Kc7 54.Ke3 Kb6 55.Rb2 Ka5 56.Bd1 Rh7 57.Rb8 Rg7 58.Rb5+ Ka6 59.Rb2 Rb7 60.Bb3 Ka5
After automatic backward solving of this line by SF on 24 threads with 32Gb hash and 5'/move, I got only one alternative move although the "blunder- boundary" was set to 0 cp, that was
51.Rd2 instead of 51.f5.
The output- line of that alternative move stored was continued with 51...Rhb8 52. Bb3 f5, but given the 51.Rd2 the output changed to
[d]r6r/4k3/3p1p2/2p4p/2P1PPpP/3PK3/P2R4/3B4 b - - 0 1
Analysis by Stockfish 120415 64 POPCNT:
51...f5 52.Kf2 Kf6 53.Kg2 Rae8 54.Re2 Rb8 55.Bb3 Ra8 56.Kg3 Rhb8 57.Re3 Ra7 58.Re1 Rd8 59.Re2 Rf8 60.Rb2 Rb8 61.Re2 Ra3 62.Kf2 Raa8 63.Kg3 Rf8 64.Re1 Rfe8 65.Kf2 Ra7 66.Kg3 Ke6 67.Re2 Rb8 68.Re1 Rba8 69.Kg2 Rg8 70.Kg3 Rc8 71.Rd1 Ra3 72.Re1 Rca8 73.Re2 R3a7 74.Rd2 Rd7 75.Rb2 Kf6 76.Re2 Rb7
-+ (-1.91) Depth: 51/62 00:12:50 15375MN, tb=13006370
So we are at evals of about 200 cp there, at the starting position of Louis' thread at about 140 and at the end of the line at about 350 cp.
No other alternative move found by SF at automatic backward solving with good hardware- time then the one above with an yet also already higher eval than at the starting position of about 130% of the lower one.
Eval- raise of about 250% from the starting position to the end of the line.
Even if that doesn't prove anything for sure, to somebody used to deal with engine- outputs and - evals it does say a thing, doesn't it?
But more relevant than such: is there any doubt that the position at the end of the line is clearly won for Black?
[d]8/1r6/3p1p2/k1p2P1p/2P1P1pP/rB1PK3/PR6/8 w - - 0 1
Analysis by Stockfish 120415 64 POPCNT:
61.Rb1 g3 62.Rg1 Rg7 63.Bd1 Rxa2 64.Bxh5 Rh2 65.Bg6 Rxh4 66.Kf3 Rh2 67.Rb1 g2 68.Kg3 g1R+ 69.Rxg1 Rd2 70.Kf4 Rxd3 71.Rb1 Rd4 72.Rb5+ Ka4 73.Rb8 Rxc4 74.Rf8 d5 75.Rxf6 Rxe4+ 76.Kg5 d4 77.Rd6 Re2 78.Kh6 Rc7 79.f6 Rf2 80.Kg5 Kb3 81.Kg4 Rf1 82.Bd3 Rg1+ 83.Kf5 c4 84.Be4 d3 85.Rd8 Rf1+ 86.Ke5 Rf2 87.Bg6 d2
-+ (-3.63) Depth: 43/64 00:04:34 5087MN, tb=2189713
And then, if you really want to come to a mutual result with me about the position of this thread of some relevance as to prove anything:
As I offered to Louis already here
http://www.talkchess.com/forum/viewtopi ... 47&t=56059
That’s of course open to you too: we can easily play one to three corr.- games with TC of your choice by private message or by email, with me playing Black and you White from the starting- position of this thread.
Up to three, me always being the white one, if you don’t take much too much time for the first one, in that case let’s stick to a single one. (I’d say 1 month should be enough for the first one, I think I was ready to win or draw in a week at most, I simply don’t count the possibility to lose with Black.)
Then we come back to the public forum with the result(s) but I for sure will not start playing a “game” with you posting by posting any more.