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Hatim Ibrahim vs Darmen Sadvakasov
Asia-ch U20 (1995), Esfahan, rd 7
Benoni Defense: King Pawn lines (A65)  ·  0-1



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Kibitzer's Corner
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Premium Chessgames Member
  al wazir: What a move! This would be a good Monday puzzle.
Aug-19-08  zooter: Took a bit to see this, but

22...Ne1+ forces white to capture with his rook or lose the queen.

After 23.Rxe1 Qxf2+ 24.Kh1 (only move) Qxe1+ it's all over for white with mate not far away

Aug-19-08  dzechiel: Black to play (22...?). Material even. "Easy."

There are several forcing moves (22...Bxh3+, 22...Nh4+), but the one I like best is


Not only is it check, but it forks the king and queen. White has little choice here...

23 Rxe1 Qxf2+ 24 Kh1 Qxe1+

Now white has three choices, and they are all bad, eg:

- 25 Kh2 Rf2+ 26 Ng2 Qxe2 and black is up a rook.

- 25 Nf1 Rxf1+ 26 Bxf1 Qxf1+ 27 Kh2 Qxh3+ 28 Kg1 Bd4+ and white will have to throw away the queen.

- 25 Bf1 Rxf1+ 26 Nxf1 Qxf1+ transposes to the line above.

I think white likely resigned long before this point.

Time to check.

Aug-19-08  ToTheDeath: what <zooter> said.

Clever little puzzle, it's not a very common pattern.

Aug-19-08  Terry McCracken: 22..Ne1+! and White must give up the Queen or suffer a mate in 10!

Pretty deep for a Tuesday;-)

Aug-19-08  zooter: <dzechiel: 25 Kh2 Rf2+ 26 Ng2 Qxe2 and black is up a rook.>

White can go for mate at this point by

26...Rxg2+ 27.Kxg2 Bxh3+ 28.Kh2 (28.Kxh3 Qh1#) Bd4 and mate seems inevitable

Aug-19-08  PinnedPiece: Playing along, I didn't know exactly where the puzzle setup was....

Saw the Nf3 move and was ready with a combo in case of B X N, and then:

22 b4???

so I figured my N had something good, and a couple seconds perusal found the queen fork, moving the R away from the defense....

that back rank was very weak. Definitely a situation to avoid. White's DSB should dfinitely have been moved out on move 22.

Aug-19-08  lost in space: Took me a while to see the right solution. I starded with Nh4+ and landed nowhere.

22...Ne1+ 23. Rxe1 (otherwise the Q is gone) Qxf2+ 24. Kh1 (foreced) Qxe1+ 25. Kh2 (foreced) Rf2+ 26. Ng2 and then both moves

26...Rxe2 and 26...Bf5 are winning

Time to check

Aug-19-08  tjshann: Am thinking that it must be a Knight move (after dismissing Bxh3+)

f2 is underprotected if I can steer the Rook away...Fork! R must capture, then the deluge.

Aug-19-08  Turbo.Abraham: Anyone care to explain 19...Kh7?
Premium Chessgames Member
  johnlspouge: Tuesday (Easy): Black to play and win.

Material: Even. The Black Kg2 has 1 legal move. Black has an advanced outpost Nf3 supported by Pe4 and a battery Rf8 and Qf6 pointed at Pf2. The move Ne1+ is a double attack: a royal fork plus exposure of the Pf2. The White Rf1 is overburdened and cannot defend e1 and Pf2 at once. The Bc8 eyes Ph3; only Ra8 is passive.

Candidates (22): Ne1+

22Ne1+ 23.Rxe1 [else, drop Qc2] Qxf2+ 24.Kh1 Qxe1+

(1) 25.Nf1 Rxf1+ 26.Bxf1 [else, mate soon]

(2) 25.Bf1 Rxf1+ 26.Nxf1 [else, mate soon]

Variations (1) and (2) are now confluent and continue:

26Qxf1+ 27.Kh2 Qh3+ 28.Kg1 Bd4+ 29.Qf2 Qxg3+ 30.Kh1 Bxf2

If the present gore does not suffice for a resignation, White is mated soon.

(3) 25.Kg2 Rf2#

(4) 25.Kh2 Rf2+ 26.Ng2 Bxh3

If 29.Kxh3 Qh1#, else Black threatens 27Rxg2+ 28Kxh3 then 29Qh1# or 29Qxg3#. White is finished.

Aug-19-08  RandomVisitor: 20...Qxh3 would have won sooner...

1: Hatim Ibrahim - Darmen Sadvakasov, Asia-ch U20 Esfahan 1995

click for larger view

Analysis by Rybka 3 :

1. (-4.58): 21.b4 Nf3+ 22.Bxf3 exf3 23.Bb2 Bf5 24.Qc4 Rfe8 25.Qh4 Qxh4 26.gxh4 Bxb1 27.Rxb1 Rab8 28.Bxg7 Kxg7 29.a3 Re4 30.Ra1 Rxh4 31.bxc5 dxc5 32.d6 Rd4 33.Rc1 Rxd6 34.Rxc5 Rd2

2. (-5.37): 21.Qxe4 Ba6

3. (-5.97): 21.Qa4 h4

Premium Chessgames Member
  johnlspouge: There is one variation where White survives long enough to wander around barefoot in his underwear at 50 below before collapsing:

22Ne1+ 23.Rxe1 Qxf2+ 24.Kh1 Qxe1+ 25.Kh2 Rf2+ 26.<Ng2>

Under the usual conditions (humans can improve near the end of the full computer variation), Toga gives the following best play:

[ply 15/78- time 02:59 value (to White) -13.59]

26...Bxh3 27.Bf4 Rxg2+ 28.Kxh3 Qf2 29.Rh1 h4 30.Qb3 Qxe2 31.Qd1 Rh2+ 32.Rxh2 Qxd1 33.Bxd6 Qxd5 34.Bxc5 Qf5+ 35.Kg2 Qf3+ 36.Kg1 Qxg3+ 37.Kh1 Rd8 38.Bg1

<dzechiel>'s and <zooter>'s variations probably also suffice for the win ;>)

Premium Chessgames Member
  whiteshark: Got it rather quick. At least I think so.
Aug-19-08  beginner64: 22. Qxe4 falls to ..Bxh6+ followed by Ng5+ forking king and queen.

So, how about 22. Bd2. One response by black may be Ng5, threatening Bxh6+. However, is that enough to win?

It appears to me that 22. Bd2 is perhaps the best response that white has to the threats.

Aug-19-08  ravel5184: Saw it after two seconds.
Aug-19-08  DarthStapler: Got it
Aug-19-08  JonathanJ: i needed a few minutes to see it. but i was coming straight out of my bed.
Aug-19-08  ahmadov: I found it in a few seconds...
Aug-19-08  zb2cr: Within a few seconds, I saw that the fork 22. ... Ne1+ deflects the White Rook from the defense of f2, allowing 23. ... Qxf2+ and Black goes up by the exchange and a Pawn, with a full-blown attack as well.

<Turbo.Abraham: Anyone care to explain 19...Kh7?> I'll take a crack at explaining it. It was a preparatory move. Black was anticipating throwing his Knight into f3. If White took with the g-Pawn, Black would probably want to take again on f3 with his e-Pawn--but that allows White to bring his Queen to the defense of the White Kingside by taking on g6. Thus, the preparatory move defending the Black Pawn on g6. In the event, it didn't happen because White played g3.

Aug-19-08  Samagonka: I think my brain is jammed! Saw everything else but not that...Sh*!%
Aug-19-08  BlackWaive: Tuesday.

Candidate Moves: Nd4, Nh4+, Ne1+, Bxh3+

I noticed right away that the Knight on f3 had the potential to fork, a common theme on Tuesdays. Nd4 forces the White Queen to the defense of the Bishop, but not much else.

Ne1+ produces a Royal Fork which may only be answered by Rxe1, allowing Qxf2 and Black wins the exchange with heavy initiative.

Slightly easier than yesterday's puzzle, in my opinion.

Aug-19-08  pubplayer: <RandomVisitor>How does 20 ...Qxh3 win more quickly following 21 Qxe4? It seems to me that white now has all the bases covered.
Premium Chessgames Member
  chrisowen: Positional benoni is top dog for modern chess players, yet it seems out of hand for Hatim after Nc3. More common here is 0-0/Nd2.
Aug-19-08  RandomVisitor: <pubplayer>20...Qxh3 21.Qxe4 Ba6 22.Bxa6 Nf3+ 23.Qxf3 Rxf3 and white cannot save his game.
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