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Evgeny Shaposhnikov vs Levon Aronian
Wch U12 (1993), Bratislava SVK, rd 10
Sicilian Defense: Prins Variation. Venice Attack (B55)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Apr-19-06  thundershock2k: why didnt aronian resign earlier?! to play on over here is pathetic
Aug-14-06  nummerzwei: Aronian was eleven years old when this game was played. Children often play out lost positions against lower rated opponents. This may be the reason.
Sep-07-06  Runemaster: <Aronian was eleven years old when this game was played.> How short must he have been then? It's a wonder he could reach the pieces.
Jul-11-09  MostlyAverageJoe: Here's a very difficult/insane level puzzle:

Find the best move 44...? for the black.


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Jul-11-09  Eduardo Leon: <MostlyAverageJoe>, I'd go for 44. ... Kc5, waiting until white plays Kc2 to then play Kc4. Is that the answer?
Jul-11-09  chillowack: <MostlyAverageJoe: Here's a very difficult/insane level puzzle:

Find the best move 44...? for the black.>
44...f5 looks interesting. The idea being to use up a tempo, making it White's move.

If then 45.gf Kc4! 46.Kc2 f6, and White must cede the b3-square.

However: it seems to me this idea is also possible after the text-move (44...Kc4 45.Kc2 f5 46.gf f6), so perhaps it's not what you have in mind.

Still, it looks interesting.

Jul-11-09  RobertLangdon: Immediate 44...f5 is not possible because white can play g5,g6 after exf5.44...Kc4 maybe also lose to 45.Kc2 Kb5 46.b4 axb3ep+ 47.Kxb3 Kc5 48.c4 Kd4 49.Kb4 and white wins.That only leaves 44...Kc5.Now 46.Kc1(waiting) Kb5 [Not...Kc4] 47.Kb1 Kc5[Still not ...Kc4] 48.Ka2 Kc4 [because white can not play Kc2 anymore] 49.Ka3 and only now it looks black can play ...f5 since white king is now on a3.
Jul-11-09  openingspecialist: <MAJ> I dont think this is insane or very difficult level. I think it's more Friday level.
Jul-11-09  Manic: Professor Langdon, I don't get why in your line white plays 47.Kb1. Why doesn't he just repeat moves with 47.Kd2?
Jul-12-09  RobertLangdon: <Manic> If this is peace what you want,you always get it.From <MAJ's> puzzle position I am sure there is no win for black and my doubt is in the point whether black can even hold this or not.
Jul-12-09  MostlyAverageJoe: <RobertLangdon ... I am sure there is no win for black and my doubt is in the point whether black can even hold this or not> Indeed, black cannot win, and the only drawing move is Kc5. Your analysis is spot-on, with a minor omission of the (rather boring) variant where white plays 45...Kd3.

The only way for white to win is to be able to exchange the b-pawn for black a-pawn and then push off the black king until it becomes possible to infiltrate via d5. To do this, white K must be on a2 or c2 while black K is NOT on c4. Also, if black K gets to d3, the black e-pawn will queen first, before white's passer, and Your description fills in the details.

<openingspecialist> My silicon monster finds a draw (and proves that other moves lose) only after a couple minutes worth of computation, which puts the difficulty at the Saturday/Sunday level (up to Friday, 10 seconds is usually enough). Of course, engines are notoriously bad at endgames (Deep Shredder, even with tablebases, insists for far too long that there is nothing wrong with Kc4, and only after spending about 11 CPU minutes sees the light). Still, it is quite possible that for humans (with good understanding of the endgames) this might be a less-than-insane puzzle.

Jul-12-09  MostlyAverageJoe:  
PS: after <44. ... Kc5 45. Kc1 Kb5 46. Kb1 Kc5 47. Ka2 Kc4 48. Ka3 f5> the mainline is

49. gxf5 Kd3 50. Kxa4 Kxe4 51. c4 Kxf5

with a tablebase draw:


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