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Sergei Yudin vs Oleg Loskutov
57th Russian Championship Qualifier (2004), Tomsk RUS, rd 5, May-27
Sicilian Defense: Alapin Variation. Barmen Defense (B22)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Given 3 times; par: 61 [what's this?]

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+ sac: 29.Ne5+ PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Jun-09-12  Patriot: Material is even.

Hopefully I'm right about this because I spent forever and a day going over each forcing sequence. There are quite a few candidates to consider: Rxc5+, Ne5+, Qa4+, Rxd6+, and I even looked at Rb4.

The interesting thing about 29.Rb4 is that it threatens mate or it wins the queen for rook. But 29...Be7 or 29...Qa7 seems to hold.

I chose <29.Ne5+> as the key move.

<29...Bxe5 30.Rxc5+ Kxc5 31.Qc3+ Kb6 32.Rb4+ Ka6 33.Qd3+!> (not 33.Qa3+ Qa5) and mate in a few.

33...Ka5 34.Qa3#

33...Ka7 34.Qa3+ Qa5 35.Qxa5#

33...Qc4 34.Qa3#

Jun-09-12  Patriot: I was wrong--29.Rb4 wins! And I missed a mate in two after 29...Be7. 30.Qa4+ Kd6/Kd5 31.Rd1#. It must be the 'fog of war'.
Jun-09-12
Premium Chessgames Member
  kevin86: mate to follow! soonest!
Jun-09-12  sevenseaman: <Patriot> <I was wrong--29.Rb4 wins! And I missed a mate in two after 29...Be7. 30.Qa4+ Kd6/Kd5 31.Rd1#. It must be the 'fog of war'.>

I do not think you missed anything. As it is you have made a fine job of the puzzle and any time you put into it is well-spent.

Here I do not know why you think Black is forced to play 29...Be7 in response to 29. Rb4. He plays 29...e5 and is ok in all eventualities.

Jun-09-12  WorkerBob: Why not 29.RxC5 followed by either
29...Kxc5 30.Qb4#
Or 29...BXc5 30.Ne5#
Jun-09-12  James D Flynn: 29.Ne5+ Bxe5 30.Rxc5+ Kxc5 31.Qc3+ Kb5(or b6) 32.Rb4+ Ka6 33.Qd3+ (if Ka7 34.Qh3+ Qa4 35.Qxa4# else if Ka5 Qa3#) Qc4 34.Rxc4 Rxc4 35.Qxc4+ Kb6 36.a4 Bf6(or f6 37.f4 removes the back rank mate possibility) 37.b4 and the passed Q side pawns supported by the Q will win.
Jun-09-12  bachbeet: I love this sequence of moves!
Jun-09-12  poszvald: I think Qa4+ works as well, not mate but wins queen for a rook.

1, Qa4+ Kb6 or Kb7
2, Rb4+ cxb4
3, Rxc7

Jun-09-12
Premium Chessgames Member
  FSR: White's first four moves are obvious. The only minor difficulty is the finesse required on the fifth move:

29.Ne5+! Bxe5 30.Rxc5+! Kxc5 31.Qc3+ Kb6 32.Rb4+ Ka6 (the only try, hoping for 33.Qa4+?? Qa5) 33.Qd3+! (the crusheroo) Ka7 ("best") 34.Qa3+ Qa5 35.Qxa5#

Jun-09-12  Patriot: <sevenseaman> Thanks! Yes I solved it but it got me thinking about how to more effectively solve problems like this and avoid the 'fog of war' as I mentioned. When there are so many forcing moves available at each step there has to be a better way to focus on each line without getting confused and thinking I missed something somewhere.

You're right about 29...Be7. 29...e5 seems like a deeper move to create an escape square after 30.Qa4+ Kd5 31.Rd1+ Ke6. 29...e5 is the second best move chosen by Houdini (+6.28). The best, 29...Qa5, rates as +5.65.

Jun-09-12  sevenseaman: <Patriot> <'fog of war'>! You are right, with shrapnel flying all around its a different state of mind. <29...Qa5>, what a fine move. How funny it did not occur to me at all!

This is just the kind of thing that creates 'blind spots' for humans. One feels like morphing into an engine. They never miss such things; but then anyone could press your buttons, eh!

Jun-09-12  scormus: more in hope than expectation I looked at 29 Ne5+. OK its forcing, what more could I ask for? 29... Bxe5 then 30 Rxc5+. OK another foring move, why change a winning formula? Then it all sort of fitted into place, just had to realise that 33 Qa3+?? loses. Instead Qd3+ forces the BQ offside and it will be 1-0

Looks like plenty of people got this one.

Jun-09-12  Nullifidian: My first thought on seeing this position was that the c5 pawn was the weak spot. So that led to the forcing move...

29. ♘e5+, which forces the deflection of the bishop by cutting off the king's escape square at d7.

29... ♗xe5▢ 30. ♖xc5+ ♔xc5▢ 31. ♕c3+ ♔b5/b6 32. ♖b4+ ♔a6 (all other king moves lose faster) 33. ♕d3+ ♔a7 34. ♕a3+ ♕a5 35. ♕xa5#

Nice mate.

Jun-09-12  vajeer: <Why not 29.RxC5 followed by either 29...Kxc5 30.Qb4#
Or 29...BXc5 30.Ne5#>
After 29...Kxc5 30. Qb4 black can retreat his king by Kc6. But White can continue instead with 30. Rc4+ 31. Kd5 Rxc7+ etc and winning though text moves win more directly.
Jun-09-12  hugogomes: Qd3 is fantastic.
Jun-09-12
Premium Chessgames Member
  chrisowen: Ar good it twine again ere nearly it on why escry it hope in effect

it he i neck in down the knight ersatz in e5 pulls tide again would

bine in smoke bishop out street one way in light he include

epicentre c5 key to believe in good game hunt in down cd files wreck

in glesson slide rook you level a pin up it's aint in qb6 as ti on

d6 drops right rever seems it kingc6 allow ground for mate in seven

starting with a classic one 29.ne5+ to punch under the belt hawk it

Yudin wind him up pet low inceed it Bxe5 give in rookxc5 link it

goose chase rim in c3 establish in early it hang in light queen clip

in the scarpering black king boot edict in opening double lane nice

d3 i merged out in game for a3 in stake it her in by d3 your time is

up black keepb4 going low to offer d3 as good king corner aim in

fritter a pin head just in dearie mate a3 rounder in up it deliver.

Jun-09-12  e4 resigns: A very nice finish, like a mini king chase!
Jun-09-12  Eduardo Leon: I found this one rather quickly. The first two moves suggest themselves as the only way to "open the can" where the black king hides.

<29.♘e5+ ♗xe5 30.♖xc5+ ♔xc5>


click for larger view

So far so good. Now, before the white rook can actually join the attack, white must push the black king out of the c column. This rules out 31.♕b4+. And, of course, white should not play 31.♕c4+, getting in his own rook's way.

<31.♕c3+ ♔b5/6 32.♖b4+ ♔a6>


click for larger view

Black's last chance: 33.♕a3+?? ♕a5, turning the tables.

<33.♕d3+>

Forcing the black king into either a5 (which makes ♕a5 impossible) or a7 (which makes ♕a5 useless).

Jun-09-12  LoveThatJoker: Cool puzzle!

<29. Ne5+! Bxe5 30. Rxc5+! Kxc5 31. Qc3+ Kb5>

[31...Kb6 32. Rb4+ Ka6 (forced as 32...Ka7 33. Qa3+ Qa5 34. Qxa5#) 33. Qd3+! transposes into the main line]

<32. Rb4+ Ka6>

(32...Ka5 33. Qa3#)

<33. Qd3+! Qc4>

(33...Ka7 34. Qa3+ Qa5 35. Qxa5#; 33...Ka5 34. Qa3#)

<34. Qa3#>

LTJ

Jun-09-12  LoveThatJoker: I'm glad that by solving today's puzzle correctly, I have guaranteed my pass for the week with 5/6!

LTJ

PS. <Patriot> and <sevenseaman> I'm glad to see you guys discussing 29. Rb4. Trust me, I spent quite sometime on that.

I'm glad to see that you looked at 29...Qa5 which is a very tough move to refute! Heck, I even tried the tricky 29. Rb4 Qa5 30. Rb5, but couldn't see how White could garner the concrete win after 30...Qa7 or even 30...Qa6.

One line that was brought up that I found a solution to, while I was seriously considering 29...Rb4, was 29. Rb4 Qa7.

Position after 29. Rb4 Qa7


click for larger view

Here 30. Nd4+! wins for White


click for larger view

Jun-09-12
Premium Chessgames Member
  Tiggler: Mate in 7. Forced all the way. Quite satisfying, but unusually simple (not easy, but simple) for a Saturday.
Jun-09-12
Premium Chessgames Member
  CHESSTTCAMPS: The black king is exposed, the c-pawn is pinned, and the Rh8 does nothing to contribute to the king's defense, which is obviously under heavy pressure from the white major pieces which control all the neighboring files. I was working on a solution with 29.Qa4+, when I noticed that white has something even more forcing:

29.Nxe5+!! Bxe5 30.Rxc5+! Kxc5 31.Qc3+ Kb6(/b5) 32.Rb4+ Ka6 (otherwise 33.Qa3+ forces mate next) 33.Qd3+! (of course 33.Qa3+?? Qh5 defends) and black probably resigns, because 33... Qc4/Ka5 is met by 34.Qa3#, while 33... Ka6 34.Qa3+ mates next.

The less accurate 29.Qa4+ Kb6 (Kb7 30.Qb5+ Qb6 31.Qb6+ Kxb6 32.Rxd6 wins a piece) should get the job done with 30.Rc3! cxd4 31.Rb3+ Bb4 (Kc5 32.Qb5#) 32.Rxb4+ Kc5/c6 33.Rc4+ picking up the BQ and leaving an ending Q+N+P (with connected passed pawns) versus R+R, which should not give white any trouble.

Jun-09-12
Premium Chessgames Member
  CHESSTTCAMPS: Crafty EGT defends the 29.Qa4+ line with 29... Kb7 30.Qb5+ Qb6 31.Qxb6+ Kxb6 32.Rxd6, which is an easy win, even against Crafty.
Jun-09-12  TheBish: S Yudin vs O Loskutov, 2004

White to play (29.?) "Very Difficult"

I think what determines the difficulty level here is that you have to see two piece sacrifices (consecutively) to find the win. Having said that, I find both of them right away, having never seen this game. The first one is pretty easy to find, I think; having found that, however, the second one shouldn't be too tough to find.

29. Ne5+! Bxe5

Forced, as the knight also controlled the d7 escape square. Now the c5 pawn is defended only by Black's king, so...

30. Rxc5+! Kxc5

Again forced, and now the enemy monarch wears no clothes!

31. Qc3+ Kb6 32. Rb4+ Ka6 33. Qd3+ Qc4

Forced, as after 33...Ka7 34. Qa3+ Qa5 35. Qxa5 is mate.

34. Rxc4 and wins.

Jun-10-12  Eduardo Leon: <TheBish>, 33...♕c4 34.♕a3#
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