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Ibragim S Khamrakulov vs Ivan Cheparinov
Calvia Chess Festival (2007), Calvia ESP, rd 2, Oct-21
Caro-Kann Defense: Panov Attack. Modern Defense Mieses Line (B13)  ·  0-1

ANALYSIS [x]

FEN COPIED

Annotations by Stockfish (Computer).      [23267 more games annotated by Stockfish]

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Kibitzer's Corner
Oct-28-07
Premium Chessgames Member
  Ron: Very good attacking game by Cheparinov. Open lines for Black against the castled king by move 15.
Apr-29-21  stacase: Got the 1st move and that was it.
Apr-29-21
Premium Chessgames Member
  An Englishman: Good Evening: This became so much easier after reading the instructions "Black to Move." White deserves credit for finding a clever attempt to swindle a win.
Apr-29-21
Premium Chessgames Member
  al wazir: 22...Nxe7 23. Qxd4 Rfa8? 24. Qd8+.
Apr-29-21  Walter Glattke: A) 21.-Rxa2 22.Bxh7+ Kh8 23.Qxd4 Nxd4 24.Kxa2 Ra8+ 25.Kb1 Qc2# B) 22.Kxa2 Qxc2 23.Nc3 Ra8+ 24.Na4 Rxa4#
C) 22.Ne7+ Nxe7 23.Qxd4 Rfa8 24.Kc1 (28.b3 Qxc2#) Ra1+ 25.Bb1 Rc8+ 26.Qc3 Rxc3+ 27.bxc3 Qa2? 28.Rd8# 27.-Nc6 -+ better D) 22. Ne7+ Kh8 23.Qc1 (23.Qg3? Rxb2+ 24.Kc1 Qxc2#) Rfa8 24.xxx Ra1# E) 23.Qe4 Rfa8? 24.Qxh7# 23.- Rxb2+ 24.Kc1 f5 25.Nxf5 Rxb2+ 26.Qxb2 Qxb2+ 27.Kxb2 Rxf5 -+ B,N + 2P for R
Apr-29-21  mel gibson: I also saw the first move but there were
too many wild Queen lines to follow up.

Stockfish 13 says:
21... Rxa2

(21. .. Rxa2 (♖a8xa2 ♔b1xa2 ♕g2xc2 ♖d1xd4 ♘c6xd4 ♘d5-c7 ♖f8-d8 ♖h1-e1 ♕c2-b3+ ♔a2-b1 ♘d4-e2 ♖e1xe2 ♕b3-d1+ ♔b1-a2 ♕d1xe2 ♕f4-e4 ♕e2-d1 ♘c7-b5 ♖d8-a8+ ♘b5-a3 ♕d1-d7 ♕e4-b4 b6-b5 f3-f4 ♕d7-f5 ♔a2-a1 h7-h6 ♔a1-a2 ♕f5-d5+ ♔a2-b1 ♕d5-d3+ ♔b1-a1 ♕d3-d7 ♔a1-b1 ♕d7-d5 ♔b1-a1 ♖a8-c8 ♘a3-b1 ♖c8-c1 h2-h3 ♕d5-f5 ♔a1-a2 ♖c1-h1 ♕b4-c3 ♖h1xb1 ♕c3-c8+ ♕f5xc8 ♔a2xb1) +9.34/38 123)

score for Black +9.34 depth 38

Apr-29-21  mel gibson: Following the line in the game.
White makes a serious blunder by not taking the Rook on move 21. That allows the black Rook to run wild.

White instead checks the black King with
22.Ne7+

but that leads to a mate in 18 according to Stockfish 13.

21. Bc2 Rxa2 22. Ne7+ Kh8

(22. .. Kh8 (♔g8-h8 ♕f4-f5 ♖a2xb2+
♔b1-c1 ♖b2xc2+ ♕f5xc2 ♕g2-g5+ ♖d1-d2 ♖f8-a8 ♕c2-c4 b6-b5 ♕c4-b3 ♕g5-c5+ ♔c1-d1 ♖a8-a1+ ♔d1-e2 ♕c5xe7+ ♔e2-d3 ♖a1xh1 ♖d2-e2 ♗d4-e5 ♖e2-a2 ♕e7-d8+ ♔d3-e2 ♘c6-d4+ ♔e2-f2 ♕d8-h4+ ♔f2-e3 ♘d4-c2+ ♕b3xc2 ♖h1-e1+ ♔e3-d2 ♕h4-f2+ ♔d2-d3 ♕f2-e3+) +M18/63 361)

Black wins mate in 18.

Apr-29-21
Premium Chessgames Member
  opus: 22. Qe4 Wins for White

21. Bc2 Rxa2 22. Qe4 Rfa8 23. Qxh7+ Kf8 24. Qh8#

Apr-29-21
Premium Chessgames Member
  opus: 22. Qe4 Wins for White Redux

22. Qe4 g6 23. Nf6+ Kh8 24. Qh4 Rxb2+ 25. Kc1 Ra8 26. Qxh7#

Apr-29-21  Brenin: 21 ... Rxa2 was not hard to see, though checking all of White's responses was harder. <opus>'s 22 Qe4 fails as in the game line (but without White's Ne7+) to 22 ... Rxb2+ 23 Kc1 Rxc2+ 24 Qxc2 Qg5+ and 25 Qxd5.
Apr-29-21
Premium Chessgames Member
  agb2002: Black is one pawn up.

The white king defends the bishop and the a-pawn. This suggests 21... Rxa2:

A) 22.Kxa2 Qxc2, with the double threat Qxb2# and Ra8#, wins (23.Rxd4 Ra8+ 24.Ra4 Rxa4+ 25.Qxa4 Qxa4+).

B) 22.Rxd4 Rfa8 wins (23.Kc1 Ra1+ 24.Bb1 Qxh1+ 25.Rd1 Rxb1+).

C) 22.Bxh7+ Kh8 23.Rd2 (23.Kxa2 Qxb2#) 23... Rxb2+ 24.Kc1 Rxd2 is a massacre.

D) 22.Ne7+ Kh8 23.Qe4 Rxb2+ 24.Kc1 Rxc2+ 25.Qxc2 Qg5+ and 26... Qxe7 wins decisive material.

E) 22.Qe4(f5) Rxb2+ 23.Kc1 Rxc2+ 24.Qxc2 Qg5+ and 25... Qxd5, as in D.

F) 22.Nc3 Bxc3 23.Qe4(f5) (23.bxc3 Qxc2#) 23... Rxb2+ 24.Kc1 Qg6 wins decisive material.

Apr-29-21  Walter Glattke: Correction: E) 25 - 27 .-xb2 means xc2 in my lkne above
Apr-29-21  Brenin: <mel gibson: White makes a serious blunder by not taking the Rook on move 21.>: I assume you mean move 22, when Kxa2 was possible, but this is just as bad for White after 22 ... Qxc2, e.g. 23 Rxd4 Ra8+ 24 Ra4 Rxa4+ 25 Qxa4 Qxa4+ and Black has Q+N vs R+N.
Apr-29-21  mel gibson: <Apr-29-21 Brenin: <mel gibson: White makes a serious blunder by not taking the Rook on move 21.>: I assume you mean move 22>

yes - now corrected -

Following the line in the game.
White makes a serious blunder by not taking the Rook on move 22. That allows the black Rook to run wild.

White instead checks the black King with
22.Ne7+

but that leads to a mate in 18 according to Stockfish 13.

21. Bc2 Rxa2 22. Ne7+ Kh8

(22. .. Kh8 (♔g8-h8 ♕f4-f5 ♖a2xb2+ ♔b1-c1 ♖b2xc2+ ♕f5xc2 ♕g2-g5+ ♖d1-d2 ♖f8-a8 ♕c2-c4 b6-b5 ♕c4-b3 ♕g5-c5+ ♔c1-d1 ♖a8-a1+ ♔d1-e2 ♕c5xe7+ ♔e2-d3 ♖a1xh1 ♖d2-e2 ♗d4-e5 ♖e2-a2 ♕e7-d8+ ♔d3-e2 ♘c6-d4+ ♔e2-f2 ♕d8-h4+ ♔f2-e3 ♘d4-c2+ ♕b3xc2 ♖h1-e1+ ♔e3-d2 ♕h4-f2+ ♔d2-d3 ♕f2-e3+) +M18/63 361)

Black wins mate in 18.

Apr-29-21  malt: 21...R:a2 22.Qe4

(22.K:a2 Q:c2 23.R:d4 Ra8+ 24.Ra4 R:a4+ 25.Q:a4 Q:a4+ )

22...R:b2+ 23.Kc1 R:c2+ 24.Q:c2 Qg5+ 25.Rd2 Q:d5 26.Rhd1 Ra8 27.Qc3 Qg5 wins

Apr-29-21  Cellist: For the second day in a row, I chose the wrong sacrifice! I wanted to play 21. ... Bxb2 and only then Rxa2+ (if 22. Kxb2). This is indeed mate-in-4 (19 ply) 22...Rxa2+ 23.Kxa2 Qxc2+ 24.Ka1 Ra8+ 25.Qa4 Rxa4#. Sadly, White can answer 22. Qe4 and turn the tables (or at least get a significant advantage)!!
Apr-29-21
Premium Chessgames Member
  chrisowen: Wobble keys i Rxa2 flubbs hark keys affect petulance it lo keys wobble move gack keys foots faser dazed its caddy keys i bit went keys o quip push its thermos keys glands guide it woof copy prance keys attitude keys u cooked it abe keys i about addups keys an either aids mack duff aka Rxa2 decides already in trouble anyway no?
Apr-29-21  King.Arthur.Brazil: Quickly I saw 21...♖xa2 After the 22. ♔xa2 ♕xc2 23. ♖xd4 ♖a8+ 24. ♖a4 ♖xa4+ 25. ♕xa4 ♕xa4+ 26. ♔b1 ♕d4 and White lose. Could White escape? So the King tried 22. ♖xd4 ♘xd4 23. ♕xd4. Then, Black cannot play 23...♕xh1+? because of 23. ♔xa2 ♖a8+ 24. ♖a4 and Black attack is over. Therefore, Black answer must be: 23...♘xd4 which is a very good one, since 24.♔xa2? ♖a8+ with same mate net. So, White answer is 25.♕xd4. Black may not play 25...♕xh1+ 26.♔xa2 ♖a8+ 27.♔b3 ♕xf3+ 28. ♘c3 and White survive. The Black move is 25...♖8a8 with a powerful threat of check-mate next.
Apr-29-21  njchess: 21. ... ♖xa2 -+ is fairly straightforward, and leaves White without any good options. The rook sac hauled in two pawns, a bishop and a knight. By move 27, White's pieces are confined to the first three rows of the board and his king is horribly exposed. I'm surprised he didn't just resign then.
Apr-29-21  utssb: 14.Nxd5 seems like a big improvement over 14.Qxd5.
Apr-29-21
Premium Chessgames Member
  perfidious: <utssb: 14.Nxd5 seems like a big improvement over 14.Qxd5.>

Perhaps, but Black gets compensation after 14....0-0 if his opponent snatches the material on offer. A game in which an attacker par excellence declined this chance follows: Hebden vs Nunn, 1982.

Apr-29-21  RandomVisitor: After 21.Bc2, a long computer run


click for larger view

Stockfish_21042813_x64_modern:

<54/82 1:39:12 -12.33 21...Rxa2 22.Kxa2 Qxc2 23.Rxd4> Nxd4 24.Nc7 Rd8 25.Re1 Qb3+ 26.Kb1 Ne2 27.Rxe2 Qd1+ 28.Ka2 Qxe2 29.Qb4 Qxf3 30.Nb5 Qd5+ 31.Kb1 Qd3+

Apr-29-21  Brenin: <utssb>,<perfidious>: Another good example is Short vs Miles, 1984, a game which has twice provided a tough POTD (try to find White's best 22nd move).
Apr-29-21
Premium Chessgames Member
  perfidious: Would not have come up with the idea missed by Short in the game cited by <Brenin> if allotted a day for forty moves.

Used to play the Black side of this, ca 1985 through the 1990s, but never actually reached the position where White can accept the offer.

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