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Manuel Leon Hoyos vs Milan Pacher
World Junior Championship (2008), Gaziantep TUR, rd 8, Aug-10
English Opening: King's English Variation. General (A20)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Oct-21-09  David2009: Black (the exchange down) no doubt hoped to win it back (with 45 Qd3 Nxe6) but had miscalculated: 44 Rxd8! Nxb3 45 Red6 with the unstoppable threat of R6d7+ winning back the Q. Time to check: yes.
Oct-21-09  Patriot: I considered 44.Rxd8 Nxb3 but completely missed the key move, 45.Red6. So then I started looking at 44.Rxd4 Rxd4 45.Qc3 with an x-ray to pawn on f6.
Oct-21-09  Manic: Put me in the Rde8 camp. It never occurred to me the other one can move.
Oct-21-09  The Rocket: I just couldnt get my mind of the rxd4....

of course I calculated also a a queen sack but I never occured to me that the black has nowehere to go!. O well a fidemaster missed it as well:)

Oct-21-09  JG27Pyth: Nice puzzle. All three White pieces are en prise! But sac'ing queen for rook leaves a position that demonstrates the rook pair's superiority to the queen and exposed king.

The difficulty in the puzzle consisted primarily in creating the d-file rook battery with Red6 rather than going for the 8th rank battery (Ree8 -- which for some reason was initially more seductive). As soon a you look at the d-file battery you realize it's winning.

Oct-21-09  outplayer: i didn't see 45.Red6.
Oct-21-09
Premium Chessgames Member
  doubledrooks: White throws a monkey wrench into black's plans to gain material with 44. Rxd8 Nxb3 45. Red6 (not 45. Rde8?? Kf7) and the threat of mate (if 45...Qa6) or winning the queen (with 46. R6d7) gives white a winning advantage.
Oct-21-09
Premium Chessgames Member
  kevin86: Ignore the attack on the queen! keep attacking!

White will gain the queen back for a rook and will be up rook for knight.

Oct-21-09
Premium Chessgames Member
  Jimfromprovidence: Revewing the game to see where black went wrong, it started with 38...Ree8, losing a pawn after 39 Qb3, where 38...Rxe4, below, was perfectly fine and keeps the game even.


click for larger view

Much worse was 41...Nb5, which immediately leads to the winning combination. 41...Qb8 below, was much better, protecting the knight, as well as not allowing 42 Ne6.


click for larger view

Oct-21-09  YouRang: I didn't see it for a long time -- I kept trying to make Rxd4 work.

But finally I noticed that the black king was caught in an unusual sort of vice, ideal for 2-rook mate. After a moment of looking for such mate tactics I saw that I can use this mate threat to recover the queen: 44.Rxd8 Nxb3 45.Red6 with Rd7+ coming up next.

The net effect is simply simplification. I was up the exchange+pawn before the tactic, and I'm up the exchange+pawn after, but each side has given up a queen and rook, making this white advantage stand much taller.

Oct-21-09  jsheedy: I looked at 44. Rxd4, but it led nowhere after 44...Rxd4, 45. Qc3, Qd7. So it must be 44. Rxd8!, Rxb3, 45. Red6, getting the queen back with interest on the next move, or else mate.
Oct-21-09
Premium Chessgames Member
  chrisowen: I disassembled it patching up the rooks doubling on the dfile. The finish Rxd8 Nxb3 Rd6 should suffice wounding him terminally.
Oct-21-09  Marmot PFL: Found this solution, but it took longer than usual, almost 5 minutes. Definitely slowing down with age.
Oct-21-09  A Karpov Fan: Got it in a flash!

I must be getting close to 2700 now!

Oh wait it's still only Wednesday...

:-(

Oct-21-09  YouRang: Although not best, <44.Rxd4> isn't bad, and is probably winning:

<44...Rxd4 45.Qf3!> threat: Qxf6+

<45...Qf7> only choice -- playing 45...Rd1+ 46.Kg2 first is no better.

-- 45...f5? 46.Rxg6+! Kxg6 47.exf5+ & 48.Qxb7

-- 45...Kg8 46.Qxf6 Qf7 47.Qxg6+ Qxg6 48.Rxg6+ Kf7 49.Rxb6

<46.Rxb6> and the 2 pawn advantage (including passed b-pawn) should be decisive.

Oct-21-09  jon01: It took me too much time, because at first I couldn't find the key move 44. Rxd8. I was looking the variations after 44. Rxd4 for about 10 minutes. But after trying to select all white's first moves, I immediately found the win after the text move.
Oct-21-09  wals: Manuel Leon Hoyos - Milan Pacher, World Junior Championship 2008

Analysis by Rybka 3 1-cpu:

1. (5.00): 44.Rxd8 Nxb3 45.Red6[] Kf7 46.R6d7+

2. (2.31): 44.Rxd4 Rxd4[] 45.Qf3[] Qf7 46.Rxb6 Rd7 47.b5[] Qe7

Oct-21-09  WhiteRook48: completely missed it
Oct-21-09  antharis: 44. Rxd8 looks ok because after the queen-capture from black, white threaten mate in one via Red6. Now black has the choice between mate and queenloss because black dont have any effective king-attack. After white takes the queen, white is an exchange up and should win the endgame easily. 44. Rxd8 Nxb3
45. Red6 g5
46. R6d7+ Qxd7
47. Rxd7 ...
After all it even looks like black will also loose his quasi-trapped knight quite soon.

PS:
It sometimes sucks a bit when you think about puzzles and you can read things like: <Featured in the Following Game Collections 44. Rxd8! Nxb3 45. Red6 simplifies to a won ending> just below your post-window ^^

But honestly I found it myself. ^^

Oct-21-09  dannygjk: 44.Rd4, Rd4 45.Qc3
Oct-21-09  dannygjk: Dayum, I got it wrong XD
Oct-21-09  dumbgai: This one is hilariously similar to the usual back-rank mate.
Oct-21-09  simsan: I got this one all the way to Red6. And it took me less time than usual as well. I probably got lucky :-)
Oct-21-09  CHESSTTCAMPS: <CHESSTTCAMPS:> <... 44.Rxd4 Rxd4, leaving no meaningful advantage....>

<YouRang:> <Although not best, 44.Rxd4 isn't bad, and is probably winning:...>

You are right, and the above was a sloppy preamble on my part.

Oct-22-09
Premium Chessgames Member
  Check It Out: I looked at this one this morning and could not get it. I glanced at 44.Rxd8 Nxb3 but couldn't find the winning move. I also looked at 44.Rxd4 Rxd4 45.Qf3 Qf7, but couldn't find a way.

I didn't want to give up, but it kicked my butt again tonight. When I saw 45.Red6 it all became clear.

Tough one to miss...

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