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John D Thornton vs Louis Sanchez
Tradewise Gibraltar (2012), Catalan Bay GIB, rd 2, Jan-25
English Opening: General (A10)  ·  0-1


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sac: 16...Nxd3 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
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Premium Chessgames Member
  Marmot PFL: Found it rather quickly for a Wednesday, Rg2+ sets up Ne2+ and Nxc3, Ng7 also is lost.
Apr-04-12  cyclon: From the mainlines I missed the move ( after 22. -Rh1+ ) 23. Bxh1 which also leaves Black with a clear edge.
Apr-04-12  ekanth: ...Nh3+, kh1 RxRf1++
Premium Chessgames Member
  kevin86: I missed this one-and how black can manage to fork king and queen on the run.
Apr-04-12  ekanth: Ok, forget it
Premium Chessgames Member
  dzechiel: <HelaNubo: <dzechiel: [...] 22...Qh3+ 23 Kg1 Qg2#> Ooops, dzechiel: 23.... Qg2+?? 24. Bxg2;-)>

Ouch! I stand corrected. I was in such a hurry when writing it up that I didn't bother to verify my play afterwards. At least that will teach me to catch my own mistakes.

Premium Chessgames Member
  doubledrooks: I seem to have seen all the pertinent variations except one: after 20...Rg2+ 21. Kh1 Rxh2+ 22. Kg1 Rh1+ 23. Bxh1 Ne2+ 24. Kh2 I only examined 24...Nxc3, overlooking 24...Rxf1, which wins easily.
Premium Chessgames Member
  Jimfromprovidence: I'll piggyback on many others' analysis, especially <newzild>, of the line

20...Rg2+ 21. Kh1 Rxh2+ 22. Kg1 Rh1+ 23. Bxh1 Ne2+ 24 Kh2.

click for larger view

The temptation here is to take the queen right away but that leaves only a minimal advantage for black after 24...Nxf3 25 Rxf8+ 26 Kxg7 Rf2

24...Rxf1 is correct here, as it threatens 25...Rf2+, winning the rook and the queen.

click for larger view

To stop this threat white plays 25. Qe3. Now comes 25...Rxa1 26 Ne6.

click for larger view

Black is up material, but his knight is trapped. He gets out of it by 26...Rxh1+!, forcing 27. Kxh1, and finally 27...Nxg3+.

click for larger view

Black is now up three pawns.

Incredibly difficult for a Wednesday.

Apr-04-12  FSR: <newzild: I did a rare thing and opened Rybka 2.2 to check. The best line, according to the silicon monster, is this:

20. Kh1 Rxh2+
21. Kg1 Rh1+
22. Bxh1 Ne2+
23. Kh2 Rxf1
24. Qe3 Rxa1
25. Ne6 Rxh1+
26. Kxh1 Nxg3+
27. Qxg3 Qxe6

Black has a three-pawn advantage in this queen ending.>

Thanks for checking this. Your move numbers should all have one added to them (i.e., it's moves 20-28 instead of 19-27 as you have it). This line is the exact one worked out by <Phony Benoni>, with an assist from me.

Apr-04-12  BadKnight: first i tried checkmating combo that did not work. then i spotted evacuation sac with Ne2 forking the queen. so the line goes 1...Rg2+ 2.Bxg2 Ne2+ 3.Kh1 Nxc3 4.bxc3 Kxg7 winning.

in the starting puzzle position black is already a piece down, so the puzzle position must have arisen via some strong play. i am gonna check it now.

Apr-04-12  BadKnight: all right, 18...Re2 intermizzo is the star move setting up the puzzle position.
Apr-04-12  BadKnight: aww, i did see the 2.Kh1 defense, but i assumed it should be straightforward as well after couple of forcing moves followed by knight fork on e2, and did not dig enough to find out that its incredibly difficult, as found out by many people here. laziness on my part.
Apr-04-12  James D Flynn: Whit is a piece up for a P and threatens Ne6+ with massive material gain, If Black simply plays Qxg7 White will play 21 Rxf4 and emerge a piece ahead in the endgame. Black must act quickly. 20....Rg2+ if 21.Bxg2 Ne2+ 22.Kh1 Rxf1+ 23.Rxf1 Nxc3 and Black has Q and P for R and B with both Knights en prise. The White N has no square on which he cannot be taken so 24.Nh5 gxh5(forced by threat Hf8#) 25.bxc3 and Black should win this ending, if instead 21.Kh1 Rxh2+ 22.Kg1 Rh1+ 23.Bxh1 Ne2+ 24.Kh2 Nxc3 25.Rxf8+ Kxg7 26.Raf1 Ne2 with an unclear endgame in which White's 2 R B should be better tha Black Q and N. Now for the game.
Premium Chessgames Member
  Oxspawn: <gofer> thank you. I was a bit appalled. It is like googling yourself. But it does work.
Premium Chessgames Member
  chrisowen: Ebullient in fold it nxg7 cold front it allow in rooke2 aint it space

queen shunting fold into c3 kick d5 check king h8 and in swipe it her c3

you lest d5 for on 20.qc3 in halfed crow 20...rg2+ hive go 21.bxg2 ne2+

turn on a sixpence win ha squeaky it clean in e2 flat white a noony it

can try knightxq - Evasion brisk h1 then 21.kh1 way it rxh2+ kingxh2 and

forced thankyou 22...qh3+ covers mate in e2 black it see for in danger

it ng7 ate toe-end it re2 binds queen bishop thane a league apart in

nxc3 vent hand shown in g7 bop re2 network it feather in c3 first it d5

in turn a blinker eye ah kh8 and what now abort 20.rxf4 you see sac


Premium Chessgames Member
  chrisowen: Gives lead vine black for us it isn't viable eddy in current form it bench

in frank it rookxf4 rxd2 21.rxf8+ kxg7 22.rf7+ qxf7 23.bxf7 kxf7 24.b3 I

get the feeling it haunches for light rooka1 kingg1 dominated black rook

should do the damage? Going back to qc3 deep in g7 consequence in

reading rustle up ride a swag i bring collect it he in g2+ ala swimming

knick off f1 then old speculate to accumulate dossier nxc3 at fooling

around in black has queen for heading off too light piece!

Premium Chessgames Member
  CHESSTTCAMPS: <David2009><To my surprise it peacefully continued with the game continuation until the position where White resigned - and then simply played 24.Nh5!. Playing Black, I could find nothing better than 24...gxh5 25.bxc3 c6 26.h3... >

I considered 24.Nh5 before making my first post, but I didn't see anything in it. For a change, I beat the bot on the first attempt. I started playing it the same way you did, but instead of playing 25...c6 (and I didn't view your line of play beforehand), I decided that an active queen was best:

25... Qa4! 26.c5?! Qxa2 and went on to win - black's a-pawn is too fast and ends up winning the bishop.

Apr-04-12  Patriot: White is up a piece for a pawn.

White threatens a discovered check (such as 21.Ne6+).

Black needs to do something fast. 20...Rg2+ 21.Bxg2 Ne2+ or 21.Kh1 Rxh2+ 22.Kxh2 Qh3+ 23.Kg1 Ne2#.

Apr-05-12  dragon player: Black's knight is hanging and white, who is a knight up, is threathening to move his knight, which is probably mating. I think a check is the solution.


If 21.Kh1 Rxh1+ 22.Kxh1 Qh3+ (22.Kg1 Ne2+) 23.Kg1 Ne2#

22.Kh1 Rxf1+
23.Bxf1 Nxc3
24.bxc3 Kxg7

and black has won material.
Time to check


Almost the same moves.


Apr-06-12  TheaN: Only now do I see the posts by Phoni Benoni and FSR and see how complex this position really is. Good job on finding that without help.
Premium Chessgames Member
  Penguincw: In the final position, white is down a rook+bishop for a queen, and a pawn, and if white captures the knight, a poor pawn structure will be deadly in the endgame.
Apr-08-12  FSR: <OhioChessFan: I am surprised how easily I found this. Maybe my tactical skills are improving. <FSR> do you ever sleep?>

Sleep is for wimps.

Apr-08-12  qqdos: <chrisowen> are you by any chance a re-incarnation of Professor Stanley Unwin?
Premium Chessgames Member
  chrisowen: <qqdos> Age irc ie the elbows i dermatological it Pinfolded Cinched Jingo?
Apr-09-12  qqdos: <chrisowenload> to sort that out I will have to ploddy-ploddy forward into the deep complicadent fundermold of the forry!
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