|Feb-10-16|| ||notyetagm: K Gulamali vs A Tari, 2016|
Wow, White is *annihilated* in this game.
|Jun-01-19|| ||al wazir: My idea was 23...Nc6, with an eye to 24...Nb4. Now if 24. g4, black just plays 24...Qxg4.|
If 24. Rxd8, then 24...Qb1#. If 24. Kb2, then 24...Nb4 25. Rxd8 Qb1+ 26. Kxa3 Nc2+ 27. Qxc2 Qxc2.
White has ♖+♗+♘+♙ vs. ♕, but his ♔ is in a precarious position.
|Jun-01-19|| ||nalinw: Thank goodness they have adjusted the setting in the player so that each click is only a (half)move ...|
|Jun-01-19|| ||LoveThatJoker: Because Black threatens to mate White via ...Qb1 (should the Rook on d3 move), I believe that the best way to proceed is via 23...N5c4! 24. bxc4 bxc4 25. Rxa3 Rxd2 26. Kxd2; and although White has gained 11 points worth of material, and Black only 9 points, with these exchanges, Black can capture the pawn on f4 immediately if he likes and has a fully exposed White King to play against. Therefore, Black has the initiative and is preferable to White here. LTJ|
|Jun-01-19|| ||Danoboston: Extraordinary mastery of the geometry in this mating net.|
|Jun-01-19|| ||wtpy: I deviated from the game line on black's second move 23..N5c4 24 bc4 Nc4 because I missed the mate on b1. Still moving forward with this line 25 Rd8 Nd2 26 Rd2 Qf4 and per Olga, black's advantage is roughly the same as the line with 24 ..bc4, so I am awarding myself the full point. Bring on Sunday.|
|Jun-01-19|| ||beenthere240: Two knights on the rim. Not so grim.|
|Jun-01-19|| ||mel gibson: I knew one of the Knights had to attack
the Queen by going to c4.
Stockfish 10 says:
(23. .. N5c4 (♘a5-c4 g2-g4 ♕f5xg4
b3xc4 ♘a3xc4 ♖d3-g3 ♕g4-f5 ♗f1-d3 ♖d8xd3 ♕d2xd3 ♕f5xf4+ ♗f2-e3 ♕f4xe5
♗e3-d4 ♕e5xd4 ♕d3xd4 ♗g7xd4 ♔c1-c2 ♖f8-c8 ♖g3-d3 ♗d4xc5 ♘g5-e4 ♗c5-a3
♘e4-d2 ♗a3-d6 ♘d2xc4 ♖c8xc4+ ♔c2-d1 f7-f5 ♖h1-f1 ♔g8-f7 h2-h3 ♔f7-f6 ♖f1-f3
h7-h5 ♖d3-c3 ♖c4-a4 ♖f3-f2 a7-a6 ♖f2-d2 h5-h4 ♖d2-f2 ♗d6-g3 ♖f2-e2 g6-g5
♖c3-c8 ♔f6-f7 ♖e2-g2 g5-g4) +4.10/39 226)
score for Black 4.10 depth 39
|Jun-01-19|| ||malt: Seeing that the d3 rook is pinned, and my Knight a5 doing nought, I went with|
23...N5c4 24.bc4 bc4 25.g4 Rb8 26.Qe3 Rb1+ 27.Kd2 Rb2+ 28.Kc3 (28.Kc1 Rc2+ and 29.Kd1 Rfb8)
28...Rc2+ 29.Kb4 Rfb8+ 30.K:a3 Qc8
24.g4 could be Whites strongist move.
|Jun-01-19|| ||Everyone: That's the way it is.|
|Jun-01-19|| ||Chris Bennington: I must be missing something, but it strikes me that |
24. b x c4. N x c4
25. Q any. Q x f4+
Presents a lot more immediate threats and a shorter demise for White. What am l overlooking?
|Jun-01-19|| ||patzer2: Like <al wazir> my attempt at solving today's Saturday puzzle was 23...Nc6. It's a natural looking move which secures an advantage for Black against all but one White reply.|
The problem with 23...Nc6 is White turns the tables and gains an advantage after 23...Nc6 24. g4! Qxg4 25. Bh6 Qh5 (25...Rxd3 26. Bxg4 Rxd2 27. Kxd2 h6 28. Nf3 ± (+ 1.13 @ 33 ply, Stockfish 10) Bd7! ± to +- (+1.25 @ 32 ply, Stockfish 10).
So the best solution is the game move 23...N5c4! -+ which takes advantage of the fact that the White Rook on d3 is pinned due to a mate threat (e.g. 23...N5c4! 24. Rxc8?? Qb1#).
After 23...N5c4!, White has nothing better than conceding Black a decisive advantage with 24. bxc4 bxc4 25. Kb2 cxd3 -+ (-3.92 @ 34 ply, Stockfish 10).
In the follow-up, Stockfish 10 indicates both sides make a series of less than best moves with 27...Rb1? (best is 27...Rfd8 -+) 28. Kd2 Rd8+ ⩱ (best is 28...h6 -+) 29. Kd3? (best is 29. Kd2 -/= to =) 29...Qd7? (best is 29...Rxf1 30. Rxf1 Rd3+ -+).
P.S.: So where did White go wrong?
White's last best chance to secure drawing chances appears to be 29. Ke2 Rd3 Bh3! ⩱ to = (0.00 @ 35 ply, Stockfish 10) instead of 29. Kd3?, which allows 29. Kd3? Rxf1! 30. Rxf1 Rd3+ 31. Qxd3 cxd3 -+ (-5.78 @ 28 ply, Stockfish 10).
Earlier in the opening, to maintain a White initiative, I prefer 11. Kb1 ⩲ to ± (+0.67 @ 37 ply, Stockfish 10) over the game continuation 11. f4 Qe6 = (0.00 @ 30 ply, Stockfish 10).
A couple of examples of play after 11. Kb1 ⩲ are White's win in A Giri vs Gelfand, 2014 and the draw in Nakamura vs W So, 2016.
|Jun-01-19|| ||TheaN: Hah. I see a lot actually also played my move by reloading with the Knight instead of pawn after <23....N5c4 24.bxc4 Nxc4 ∓>. This works as well though is slightly less penetrating.|
Somehow I failed to visualize that after 24....bxc4 25.Rxa3 Rxd2 26.Kxd2 Qxf4+ 27.Be3 Qxe5 -+ White is in a lot more peril compared to the Knight alternative due to the peculiar position of the rook on a3:
click for larger view
compared to 24....Nxc4 25.Rxd8 Nxd2 26.Rxd2 Qxf4, the concept is similar but White can wiggle himself out of this with 27.Nf3 Rd8 28.Bd4! Rxd4 29.Nxd4 Bh6 30.Nf3 Qb4 31.Kd1 Bxd2 32.Nxd2 Qa4+ ∓ especially because of the lacking weak rook on the Queen side:
click for larger view
Verdict: bxc4 ends up around -5 with best play, Nxc4 -2. Both win, but the latter is not the best move.
|Jun-01-19|| ||King.Arthur.Brazil: I didn't succeed. Initially I thought about 23...Rd7(?) but 24.c6 seems to win a tempo for white. Also 23... Rd5 24.c6 R8d8 25. c7! or 24.Be2 R8d8 25. Rd1 seems to protect white. I don't see either nothing good wiith 23...Nxb3+(?) 24. axb3. I felt lost and didn't really see N5c4. When I saw that 24.bxc4 is almost a forced move, I began to conclude that this must be a very strong move and something must come form it. 24... bxc4 25.g4 (hard but seems forced too) 25.... Rb8 (this move 2 moves I found) 26. Qc3 Qxg4 (here I made a change of order, 26...Rb1+ 27. Kd2 Qxg4... Again 26... Qxg4 seems best and also 27.Rf3 reply shows that white is doing the only moves to stand. 29... Qd7! Without this possibility, maybe the fight would go longer. I lost my way again, trying 29...Bxe5 30. fxe5 Qxg5+ 31.Ke2. Following 29... Qd7 I wonder if the desesperated try 30. Bxc4(?) Nxc4(?) 31. Qxc4 Rxh1 32. Qxf7+ Kh8 33. Rh3 could save (lgs). But I guess that after simple 30... Rxh1 31.Bxf7+ Kh8, 32. Rh3 h6 and the white will die with music (lgs). 30. Rg3 Qa4! I doubt that black has imagined this position at the 26th move. I guess he constructed it step by step. Now the threat is clear: Rxf1 Rxf1 Rd3+ capture the white Q. 31. Ke2 Qd1+ End. Black made a beautifull combination.|
|Jun-01-19|| ||petemccabe: A Tari Breakout.|
|Jun-01-19|| ||agb2002: Black has a knight and a bishop for the bishop pair and a pawn.|
White threatens Qxa5, Rxd8 but this is momentarily stopped by Qb1#, and g.
The position of the black knights suggests Nc6 and N5c4. In the case of 23... N5c4:
A) 24.bxc4 bxc4
A.1) 25.Rxa3 Rxd2 26.Kxd2 Qxf4+ 27.Be3 Qxe5 looks winning. For example, 28.Rxa7 Qb2+ 29.Ke1 Bc3+ 30.Kd1 Rd8+ and mate in three.
A.2) 25.g4 Rb8 (25... Qc8, intending Qb7, is met with 26.Rxd8 Rxd8 27.Qb2)
A.2.a) 26.gxf5 Rb1#.
A.2.b) 26.Rb3 Qb1+ 27.Rxb1 Rxb1#.
A.2.c) 26.Qb2 cxd3
A.2.c.i) 27.gxf5 d2+ mates or wins decisive material.
A.2.c.ii) 27.Qxb8 d2+ 28.Kxd2 Qc2+ followed by 29... Rxb8 wins decisive material.
A.2.d) 26.Qc3 Qxf4+ 27.Be3 Qxg4 unclear (28.Bh3 Qe2; 28.Qxa3 cxd3).
B) 23.Qe2 Qxf4+ 24.Be3 Bxe3 25.Qxe3 Qxe3+ 26.Rxe3 Bh6 followed by f6 seems to win decisive material.
C) 23.g4 Nxd2 24.gxf5 Nxf1 25.Rxd8 Rxd8 26.Rxf1 gxf5 looks even.
|Jun-01-19|| ||payan: what about the 30.c6? and for example 31.Qxa3...|
|Jun-01-19|| ||TheaN: <payan: what about the 30.c6? and for example 31.Qxa3...>|
I don't really get 31.Qxa3... after 31....Qxa3+ 32.Ke4 c3 -+ White just gives queen for rook in a situation that's solvable otherwise.
30.c6! is a very good suggestion though. Kind of puts 29....Qd7 to the question: the knight's immune due to the mate on the d-file, so lets lure the queen away first: after 30.c6 Qxc6 31.Qxa3 =/- is playable but the king's still in peril.
|Jun-01-19|| ||Breunor: <I must be missing something, but it strikes me that|
24. b x c4. N x c4
25. Q any. Q x f4+
Presents a lot more immediate threats and a shorter demise for White. What am l overlooking?>
Like you and Wtpy, I also went for 24 Nxc4.
Here's what the computer says:
1) -2.54 (24 ply) 24...bxc4 25.Kb2 cxd3 26.Kxa3 f6 27.Nf3 fxe5 28.fxe5 Bxe5 29.Qb4 Rd5 30.Qc4 Bg7 31.Bd4 Bxd4 32.Nxd4 Qe4 33.Bxd3 Qxd4 34.Qxd4 Rxd4 35.Bc2 Kf7 36.Rf1+ Ke8 37.Rxf8+ Kxf8 38.Ba4 Rc4 39.c6 Ke8 40.Kb3 Rc1 41.Kb2 Rc5 42.Ka3 Kd8 43.g3
2) -1.74 (24 ply) 24...Nxc4 25.Rxd8 Nxd2 26.Rxd2 Qxf4 27.Nf3 Rd8 28.Bd4 Rxd4 29.Nxd4 Bh6 30.Nf3 Qb4 31.Kd1 Bxd2 32.Nxd2 Qxc5 33.Bd3 Qd5 34.Be4 Qxe5 35.Kc2 f5 36.Bf3 e6 37.Rb1 Qc5+ 38.Kd3
so 24 N x c4 is still good, bxc4 is better.
<Payan: what about the 30.c6? and for example 31.Qxa3...>
Computer says best for white here is:
1) -0.74 (23 ply) 30.Nxf7 Kxf7 31.Bxc4+ Kf8 32.Rxb1 Nxb1 33.Qc2 Nd2 34.Rg3 Qd4+ 35.Ke2 Qxc4+ 36.Qxc4 Nxc4 37.Rc3 Na5 38.c6 Rc8 39.c7 a6 40.Bb6 Nb7 41.Rh3 h5 42.Ra3 Ke8 43.Rg3 Kf7 44.Ra3 a5 45.Rd3 g5 46.Kf3 Kg6 47.Rd7 Kf7 48.fxg5
On c6, it has:
1) -1.16 (29 ply) 30...Qxc6 31.Qxa3 c3 32.Bd3 Rxh1 33.Qb3 Qb6+ 34.Qxb6 axb6 35.Bg3 b5 36.Ne4 b4 37.Rf2 Bh6 38.Bc2 Ra1 39.Bb3 Rb1 40.Rc2 e6 41.Rf2 Rc8 42.Rc2 Bf8 43.Bh4 Rc6 44.Ke2 Ra1 45.Ke3 Rf1 46.Bg3 Rb1 47.Bh4
30 Rg3 does seem to be the losing move, but we ought to remember the difference between playing a human and a computer - even for a GM, the amount of pressure white is under makes it hard to keep finding the best moves.
1) -2.88 (18 ply) 30...Qa4 31.c6 Nc2+ 32.Kf3 Qxc6+ 33.Kg4 Qxh1 34.Bxc4 Qd1+ 35.Qf3 Qd7+ 36.Kh4 e6 37.Qe4 Qd2 38.Rg2 Rh1 39.Bg1 Qd1 40.Qxc2 Rxg1 41.Qxd1 Rgxd1 42.Be2 Rc1