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Jean-Luc Roos vs Gilles Miralles
FRA-chT (1996/97), Clichy FRA, rd 11, May-04
Formation: King's Indian Attack (A07)  ·  0-1

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Oct-18-09  WhiteRook48: did not see 22...Bxe2
Oct-18-09
Premium Chessgames Member
  Jimfromprovidence: After the alternative suggestion 26 Bf1 instead of the text Kh2, in addition to 26...Bxb2 or 26...b3, black also has 26a4!

If white follows with 27 Be3, then sacrifice the rook below with 27a3!


click for larger view

Now, if 28 Bxc1, then 28a2 and the pawn cannot be stopped.


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Instead, if 28 bxa3 , then 28Rxf1+!. Now, if 29 Qxf1, then 29 bxa3.


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White cannot stop the promotion without losing material. If the queen moves to the second rank, then black's rook will move to b2, providing an escort to promotion.

Oct-18-09  zb2cr: Found the first move and the basic idea, but I couldn't be sure I'd calculated it all the way through. 1/2 credit for me.
Oct-18-09  BOSTER: Hi, <David2009>.
I understand your desire to find a refutation, but this is only the losing the time. After 23.Qxe2 Rybka3 evaluation -3.99. It means white game is lost. Better try to understand what is wrong in white position, why evaluation is so high.
Oct-18-09  Athamas: Sacrifice... the surrender or destruction of something prized or desirable for the sake of something considered as having a higher or more pressing claim... or to surrender or give up, or permit injury or disadvantage to, for the sake of something else.

There is no sham in a sacrifice.

On a different note, I saw a4 or Rbc8 winning for black if Bf1 instead of Kh2 much like <JimfromProvidence>'s line. Although b3 may be better, I just saw the other 2 possibilities as much easier.

Also, most humans would not consider Kh2 instead of Qxe2 because being a piece down is completely losing. If there were an alternative move, I could agree with you... but Kh2 just concedes that Rfc1 was a losing blunder instead of making your opponent play accurate moves to take advantage of the mistake.

Oct-18-09  TheBish: J Roos vs G Miralles, 1997

Black to play (22...?) "Insane"

The only idea I could find (and I believe the right one) is 22...Bxe2 23. Qxe2 d3! 24. cxd3 (or 24. Qxd3 Bxb2 wins the exchange) Qxc1+ 25. Rxc1 Rxc1+ 26. Kh2 (neither 26. Bf1 nor 26. Bg1 Bd4 27. Bf1 Bxg1 28. Kxg1 b3 29. Qe3 Rc2 30. Qd4 Rb4 31. Qa7 Ne5! improve) b3 27. d4 Rc2 28. Qe3 Rxb2 29. e5 Bh6! 30. Qe1 (or 30. Qxh6 Rxf2 31. Qe3 Rxg2+ 32. Kxg2 b2 33. e6 Nf6 34. exf7+ Kf8 35. d6 Rb7 and the pawn will queen with a big lead) Rd2 31. e6 (or 31. Be4 Rc8 intending 32...Rc1) fxe6! 32. dxe6 (32. Qxe6+ Kh8 33. Qxd7 Rxf2 34. Qc7 Rff8 35. Be4 Rbc8! 36. Qxa5 Rc2+! 37. Kg1 Be3+ 38. Kh1 Rf1#) Nf6 33. e7 b2 34. Qe6+ Kg7 and Black wins.

Time to see what I missed.

Oct-19-09  CHESSTTCAMPS: Material is even, with both sdes fully developed. Black's pieces are better placed (particularly the doubled majors on the c-file), his king is safer (with a 3-pawn shelter), and the Bg7 is prepared to be unleashed. White has multiple pieces on the 2nd rank that are unprotected by pawns and are vulnerable to lateral attack. White does threaten 23.Nxd4, which indicates that black should play 22... d3 or 22... BxNe2. Considering the weakness of white's 1st and 2nd ranks, I quickly decided in favor of the forcing line that wins 2 rooks for queen plus pawn unless white decides to give up the exchange. However, it's important to analyze the speed of each side's passed pawns before going into this line:

22... Bxe2 23.Qxe2 d3 and now:

A) 24.Qxd3 Bxb2 25.Bd4 Bxc1 26.Rxc1 Qc4 27.Qd2 b3! 28.c3 b2 29.Rb1 Qa2 30.Qd1 f6 and white can't defend the advance of the a-pawn.

A.1) 25.d6 Qc4 26.Qxc4 Rxc4 27.Rab1 Bxc1 28.Rxc1 b3 wins.

A.2) 27.Qxc4 Rxc4 28.Bb2 R8c8 wins quickly.

A.3) 28.Bf1 Qxc2! 29.Rxc2 bxc2 30.Be3 c1/Q+ 31.Qxc1 Rxc1+ 32.Bxc1 Rb1 decides immediately.

B) 24.cxd3 Qxc1+ 25.Rxc1 Rxc1+ 26.Kh2 (Bg1 Bd4 wins a piece) a4!

Doubling on the c-file with R8c8 takes too much time - white shouldn't be allowed to mobilize his pawns first with d4-e5-e6.

27.d4 a3 28.bxa3 b3 29.Qb2 Rc2 30.Qb1 Rxf2 31.e5 b2 32.e6 Bxd4! 33.exd7 Bf6

With the advanced d-pawn under control, black can now force the win of the queen. white requires 2 tempi to release the Bg2 from the pin.

34.g4 (Kg1 Rc2! 35.Bd4 Rc1+ 36.Kf2 Rxb1 37.Bxb1 Rc8-c1 is also easy) Rc2! 35.Qxc2 b1/Q and white can resign.

B.1) 27.Bd3 Rb1 28.d4 (else 28...Rxb2) a3 29.bxa3 b3 30.e5 f5! (to keep the Bg2 out of e4) 31.e6 b2! 32.exd7 Bf6 and white is helpless to stop Ra1 followed by promotion of the b-pawn.

Time to see how the game went....

Oct-19-09  patzer2: Correction to my previous post: After the end of the analysis of 26. Bf1 b3!, it should be (not as I mistyped) as Black wins easily.
Oct-19-09  David2009: I would like to thank <Jimfromprovidence>, <goodevans> <patzer2> and <CHESSTTCAMPS> for their shrewd refutations of Crafty's defence 26 Bf1. When I first set up my links (before my second post) I thought winning would be easy - I fell into the doubling-rooks trap (as does Crafty when attacking as Black) only to fall for the line 25 Rxc1 Rxc1+ 26 Bf1 Rbc8 27 Be3 R1c2 28 Qg4 Ne5 29 Qd1 Rxb2 ("this is too easy") 30 d4 Nc4? 31 Qc1! wins at least the exchange.

<CHESSTTCAMPS: [snip] I quickly decided in favor of the forcing line that wins 2 rooks for queen plus pawn unless white decides to give up the exchange. However, it's important to analyze the speed of each side's passed pawns before going into this line..[snip] Doubling on the c-file with R8c8 takes too much time - white shouldn't be allowed to mobilize his pawns first with d4-e5-e6.>. This is a perfect summary of the strategy that should underpin the tactics. The successful solvers all used it.

Of the three refutations of 26 Bf1, I particularly liked <Jimfromprovidence>'s solution and diagrams beginning ...a4! truly elegant.

Dec-20-20
Premium Chessgames Member
  al wazir: <22...Bxe2 23. Qxe2 d3 24. cxd3 Qxc1+ 25. Rxc1 Rxc1+> is easy to see, and it doesn't even cost black anything. Material is even at that point.

But now it gets harder. 27. e5 isn't forced. White could have played 27. Be3. If 27...R8c2, then 28. Qf3 Ne5 29. Qf4.

That's substantially the same thing I wrote the last time this position was posted.

Dec-20-20
Premium Chessgames Member
  An Englishman: Good Evening: Solved this in 2009, flubbed it in 2020--yeah, this year has sucked. 4/5 this week with 2 already known.
Dec-20-20  Walter Glattke: 27.d4 R1c2 28.Qe3 Rxb2 29.e5 R8c2 30.Kg1 Rxf2 31.Qxf2 Rxf2 32.Kxf2 Kf8 33.Ke3 Nxe5 34.dxe5 Bxe5 35.g4 b3 36.Kd3 b2 37.Kc2 a4 38.Kb1 Ke7 39.Bf3 Kd6 40.Bg2 Kc5 41.Bf3 Kc4 42.d6!? Kc3! 43.d7 Bc7 44.Bd5 f5 45.gxf5 gxf5 46.Bg8 f4 47.Bxh7 f3 48.Be4 f2 49.Bg2 a3 50.h4 a2+ 51.Kxa2 Kc2 52.Be4+ Kc1 53.Bd3 f1Q+ 54.Bxf1 b1Q+ 55.Ka3 Bd6+ 56.Ka4 Qb4#
Dec-20-20  Mayankk: The first few moves are extremely forcing with not many side variations to worry. 22 ... Bxe2 forces the White Queen on a vulnerable square. 23 ... d3 attacks it immediately where Qxd3 loses to the Bishop fork via Bxb2 when White must lose a Rook. This necessitates 24 cxd3 after which we have 24 ... Qxc1+ 25 Rxc1 Rxc1+.

It gets a little murky after that. White has many options to respond but the b2 pawn remains vulnerable, Black Rooks can double up on c file anytime and then even more ominously on the 1st or 2nd rank while the falling of b2 pawn will lead to Black having either one or two passed pawns on a and b files.

All-in-all, Black need not look much beyond 25 ... Rxc1+ to get into this variation since the position is so juicy anyways.

Dec-20-20  Brenin: There's not much to add to the comments of <al wazir> and <Mayankk>: after the fairly easy-to-see first five moves, White has too many possibilities for tactical calculations, and it has to be a positional judgment that Black's 2R will be stronger than White's Q, that Black's N can deal with threats like Bh6 in the final position, that White's 2B cannot work together effectively with the Q, etc.
Dec-20-20  Walter Glattke: l am sure, black wins by Rb1-R1xb2. White lose a Bishop then and must change Q>RR, then the a-pawns decide, but only consideration, long ending, Stockfish and Gibson could say anything to that.
Dec-20-20
Premium Chessgames Member
  chrisowen: Dove its ball vast Bxe2 guff abracadabra mib vast a hovel room guv dove its ball vast pals lasp vido quorn rick quick nick cinch winch mint dove its ball muff jug its clarks vast aorta pin phylum djon edit fowl tots ups crock cuff vast figgy fund hint Bxe2 cluck;
Dec-20-20
Premium Chessgames Member
  malt: Went with 22...B:e2 23.Q:e2 d3 24.cd3
(24.Q:d3 B:b2 )

24...Q:c1+ 25.R:c1 R:c1+ 26.Bf1
(26.Kh2/ Bg1/Be1 )

26...Rbc8 27.Be3 R1c2 28.Qg4 Ne5 29.Qd1

29...a4 looks stronger than ...R:b2
30.d4 a3

Dec-20-20  cormier: 11.axb4 not sure ? is there anything better ?
Dec-20-20  RandomVisitor: After 20...Nd4 white should use the other knight to take on d4:


click for larger view

Stockfish_20121407_x64_modern:

<59/81 5:13:02 -0.08 21.Nexd4 Bxf1 22.Nc6 Bb5 23.Ne7+> Kh8 24.Ng5 Rf8 25.d6 Qd8 26.Qd5 Nf6 27.Nxf7+ Rxf7 28.Qxf7 Qxd6 29.Nd5 Nxd5 30.Qxd5 Qxd5 31.exd5 a4

58/74 5:13:02 -3.77 21.Nfxd4 exd4 22.Nxd4 Bxf1 23.Rxf1 Ra8 24.Be3 Ne5 25.Bf4 Qd7 26.Rb1 Qa7 27.Bxe5 Bxe5 28.Nc6 Qc7 29.b3 Bxg3 30.c4 bxc3 31.Qxc3 Re8

Dec-20-20
Premium Chessgames Member
  agb2002: White threatens Nxd4.

Black exerts some pressure on the c-pawn. This and White's threat suggest 22... Bxe2 23.Qxe2 b3 (or 23... d3 24.Qxd3 Bxb2 25.Rab1 Bxc1 26.Rxc1 but White may get some chances on the dark squares) and if 24.cxb3 Qxc1+ 25.Rxc1 Rxc1+ followed by Rxb3 looks good for Black.

Dec-20-20
Premium Chessgames Member
  thegoodanarchist: I got the first 3 moves, at least.
Dec-20-20  swordfish: I'm so surprised I got this - especially the way my tactics have been going lately....
Dec-20-20  RandomVisitor: <cormier><11.axb4 not sure ? is there anything better ?>Perhaps it is best play:


click for larger view

Stockfish_20121407_x64_modern:

<47/71 32:14 0.00 11.axb4 cxb4 12.h3 Qb6+ 13.Kh2> a5 14.c4 bxc3 15.bxc3 Ba6 16.Ra3 e6 17.Nfd4 Nxd4 18.Nxd4 Rfc8 19.Be3 Qc5 20.Nc2 Qc7 21.c4 d5

46/60 32:14 -0.35 11.h3 Qb6 12.Kh2 a5 13.axb4 axb4 14.c4 bxc3 15.bxc3 c4 16.e5 cxd3 17.Qxd3 dxe5 18.fxe5 Bf5 19.Qd2 Nd7 20.Nfd4 Ncxe5 21.Nxf5 gxf5

Dec-20-20  Cheapo by the Dozen: Easiest Sunday puzzle in ages. Of oourse you want to play ... d3 to attack b2 and perhaps also c1. Of course you'd like to undefend c1 first. ... Bxe2 turns out to serve that purpose very well.

The first time there's all that much doubt about what to do is when you're deciding which rook to play to c2, and if you pick the wrong one (as I did) the engine thinks you're still winning big.

Dec-21-20  cormier: ths <RV> .....
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