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Alexander Moiseenko vs Artur Yusupov
European Rapid Championship (2010) (rapid), Warsaw POL, rd 13, Dec-19
Queen's Gambit Declined: Miles Variation (D53)  ·  0-1

ANALYSIS [x]

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Kibitzer's Corner
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Mar-06-19
Premium Chessgames Member
  Penguincw: Wow, this feels like the easiest puzzle of the week, and it's (checks calendar) Wednesday.

Careful though. It is a queen sac, but not on f1 - on f2!

Mar-06-19  Infohunter: Mate in six, useless interpositions included.
Mar-06-19  agb2002: Black has a bishop for a knight and two pawns.

White threatens Rxc8+ and Rxf7.

Black can start a mating attack with 24... Qxf2+ 25.Rxf2 (25.Kh1 Qxg2#) 25... Rb1+ 26.Rf1 (the interpositions are useless) 26... Be3+ 27.Kh1 Rxf1+ 28.Ng1 Rxg1#.

Mar-06-19
Premium Chessgames Member
  al wazir: <Penguincw: Wow, this feels like the easiest puzzle of the week, and it's (checks calendar) Wednesday.> Right.

The ratings attached to the puzzles are a relic of the previous administration. They no longer have any relation to actual difficulty. I think we can disregard them.

Mar-06-19  drollere: i went with 24. .. Be3, which gives white a useless move or two before the forced mate.
Mar-06-19  drollere: <I think we can disregard them.>

most of us do already, or always have.

Mar-06-19
Premium Chessgames Member
  HeMateMe: Does 24...B-e3 also win? Awkward, but it seems to force mate.
Mar-06-19  saturn2: <drollere> I looked at this too.

24...Be3 25. Rxc8+ Kg7 26. h3 Bxf2+ 27. Kh2 Qxf1 now there is the threat Bg3+ folliwed by Qxg2

Mar-06-19  saturn2: Todays solution is a back rank mate the way Fisher has teached.
Mar-06-19  erixn: On 24..Be3 25.Rxc8+ Kg7 it seems to me White may try 26.Nd2!?, when 26...Rxd2 allows 27.Rg8+ Kxg8 28.Qa8+ Kg7 29.fxe3! when Pg2 is protected or (27.Rg8+) Kh6 30.Qxf7 protecting Pf2. And similarly if QxN. - I don't see any immediate mates, although Black's attack may still be dangerous.
Mar-06-19  malt: 24...Q:f2+ 25.R:f2 Rb1+ 26.Ne1
(26.Rf1 Be3+ )
26...R:e1+ 27.Rf1 Be3+ 28.Kh1 R:h1#
Mar-06-19  AlicesKnight: Found ...Qxf2+ followed by ....Rb1+ and the intrusion of the Black KB is decisive. Looks like Black saw it at least from move 21 and white saw nothing coming.
Mar-06-19  lost in space: Easy for a Wednesday
Mar-06-19
Premium Chessgames Member
  Sally Simpson: ***

Good Trap/Pitfall/Combo from a Rapid Game.

It should have been set from here. (Black to play)


click for larger view

This is where we know for certain Black saw the idea (and White obviously did not).

***

Mar-06-19
Premium Chessgames Member
  Yorkshire Fog: <HeMateMe: Does 24...Be3 also win?>

After 24...Be3 25.Rxc8+ Kg7 White can distract the bishop with 26.Rcc1 Bxc1 27.d5 Rxa2 28.Qe7 Ra1 29.Qf6+ and get a draw by perpetual check after 29...Kg8 30.Qd8+.

The alternatives at this point 29...Kh6 30.Qh8 and 29...Kf8 30.Qh8+ are both losing for Black.

Mar-06-19  eyalbd: After ♕xa7 and ♖xc7 :
Never go hunting remote pawns when your enemy controls your second rank.
Mar-06-19
Premium Chessgames Member
  HeMateMe: Was this game in Lev Albert's <300 Positions >?
Mar-06-19  ChatGrognon: Tactical combination to know: )
Mar-06-19
Premium Chessgames Member
  PawnSac: < Sally Simpson:
This is where we know for certain Black saw the idea (and White obviously did not). >

I suspect black saw the idea on move 22, but you're right that the puzzle set at 22. ..? would have been more interesting/challenging.

White blundered with < 23.Qxa7? >. After 23.Rc6 black has only a slight plus. Interestingly enough, after Qxa7 Stockfish 10 immediately and only displayed ..Bh6 in the analysis all the way up to 44 ply where it gives black +1.49 with 23. ... Bh6 24.Qa5 Be3 25.Qe1 Qxe1 26.Nxe1 Bxd4 27.Rc4 Rd8 28.Rxc7 Bxe5 etc.

white's 2nd blunder Rxc7?? is just unthinkable in lieu of the threat. What's that old saying? ... "He who grabs pawns sleeps in the streets!" Suicide!

Mar-06-19  whiteshark: Yet another <backrank mating tactic> ftw
Mar-06-19  TheaN: Wednesday 7 March

<24....?>

With a Queen on the second rank, sacs on f7 and f2 are quite common. Typically it wasn't the first I looked at, as it seems so counterproductive. In contrary:

<24....Qxf2+! 25.Rxf2 (Kh1 Qxg2#) Rb1+ 26.Rf1 (Rc1 Rcxc1+ 27.Ne1 Rxe1+ 28.Rf1 Rxf1#, Ne1 Rxe1+ 27.Rf1 Be3+ 28.Kh1 Rxf1#) Be3+ 27.Kh1 Rxf1+ 28.Ng1 Rxg1# 0-1> is entirely forced.

Mar-06-19  drollere: <After 24...Be3 25.Rxc8+ Kg7 White can distract the bishop with 26.Rcc1 Bxc1 27.d5 Rxa2 28.Qe7 Ra1 29.Qf6+ and get a draw by perpetual check after 29...Kg8 30.Qd8+>

24. .. Be3
25. Rxc8+ Kg7
26. Rcc1 Bxf2+
27. Kh1 Bxd4

(27. Rxf2 Qxf2+ and mate next)

28. Qxd4 Qxg2#

Mar-06-19  drollere: <24...Be3 25. Rxc8+ Kg7 26. h3 Bxf2+ 27. Kh2 Qxf1 now there is the threat Bg3+ folliwed by Qxg2>

i think 27. .. Bxd4 still works.

the B is really the key to all variations of the combination; Bh6 is the "tell" for the attack.

Mar-06-19  vonKrolock: I was fancying about 24...♗e3 25. ♖xc8+ ♔g7 26. ♖cc1 ♗xf2+ 27. ♔h1 ♗g3 28. ♖g1 ♕xf3 29.gxf3 ♖xh2#


click for larger view

or 29.♖cf1 ♖xg2


click for larger view

(Evidently cooked, the actual harsh mating attack was enough...)

Mar-06-19  bcokugras: Yusupov is the world champion of our hearts.
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