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Victor Bologan vs Etienne Bacrot
"Bacrot Mate" (game of the day Jul-29-2013)
Enghien-les-Bains FRA (2001), It, rd 2, Apr-12
Sicilian Defense: Paulsen. Normal Variation (B45)  ·  0-1

ANALYSIS [x]

FEN COPIED

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Given 10 times; par: 35 [what's this?]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Jul-30-19  landshark: I took the long way around with 30.... Nb4+ 31.Ka1 Nc2+ 32.Kb1 NxB+ 33.Rd3 BxR+ 34.Ka1..... and finally Nxb3#

Didn't take the time to see 30.... Nc1+ does away with all those fun N moves on the way to the same outcome.

Jul-30-19  Cheapo by the Dozen: Fun one!

It looked at first like the horse would do more dancing, getting to c2 before waltzing off for another discovered check. But in fact that was a simpler mate than that -- two moves in essence, plus a third for a useless interposition.

Jul-30-19
Premium Chessgames Member
  agb2002: Black has two pawns for a rook.

White threatens Nc3, stopping the attack and ending up with a decisive material advantage.

Black can deliver mate in two with 30... Nc1+ 31.Rd3 (31.Ka1 Nxb3#) 31... Bxd3+ 32.Ka1 Nxb3#.

Jul-30-19
Premium Chessgames Member
  An Englishman: Good Evening: Not hard, but one beautiful mating pattern.
Jul-30-19  Stale.Mate: I’m reeling from the pun.
Jul-30-19  sabaofshani: Doesnt Nc5 also work?
Jul-30-19  charlesdecharemboul: As always, once you've watched it, it seems simple!
Jul-30-19  Lambda: White can avoid mate after 30...Nc5+ with 31.Rd3 Bxd3+ 32.Kc1 Nxb3+ 33.Kd1, though after 33.Nxd4 black is trivially winning and white would undoubtedly resign, so you can still call that a solution.
Jul-30-19  mel gibson: That was fun.
Another easy one.
Jul-30-19  malt: Found 30...Nc1+ 31.Rd3
(31.Ka1 N:b3# )
31...B:d3+ 32.Ka1 N:b3#
Jul-30-19  sabaofshani: Thank you lambda. 31.Rd3 never occurred to me
Jul-30-19  TheaN: It's a matter of seeing that Black's only missing a1 to finish the mating net, then find the correct path.

Some alternatives are enticing because they're more common, but ultimately come short here: 30....Nc5+?! aims at b3 and reveals the bishop but <interposes on the c-file>, allowing White to 'escape' 31.Rd3 (Ka1 Nxb3#) Bxd3+ 32.Kc1 Nxb3+ 33.Kd1, however Black wins after 33....Nxd4 -+.

30....Nb4+ is slower as it aims at the wrong square initially: 31.Kb1 Nc2+ <interposing b1-e4> but 32.Kb1 Nxd4+ 33.Rd3 Bxd3+ 34.Ka1 Nxb3# leads to the same end result two moves later.

So we want to b3 without interposing the rook: <30....Nc1+ 31.Rd3 Bxd3+ 32.Ka1 Nxb3#> with a beautiful pure mate to end it.

Jul-30-19
Premium Chessgames Member
  benveniste: I found ♘b4+ to be so pretty that I stopped looking.
Jul-30-19  TheaN: On a side note: it's pretty rare for a knight to end up on an opponent's bishop starting square; think this may as well be the first occurrence that I see in practical play.
Jul-30-19  TheaN: Ergo, to my last comment, <without capturing something>. Capturing the original occupant or a rook is relatively common after a check on e2/e7.
Jul-30-19  spazzky: Engine says white can hold after

1) +0.52 (28 ply) 26.Qf5 Ne5 27.hxg7 Bxg7 28.Rxh7 Re8 29.Kc1 Rb5 30.Rxg7+ Kxg7 31.Rd7 Qxc3 32.Nxc3 Nd3+ 33.cxd3 Rxf5 34.exf5 Re5 35.Ra7 Bg2 36.Rxa6 Bf1 37.Kd2 Rxf5 38.Rxa3 Rf3 39.d4 Rd3+ 40.Ke1 Bg2 41.Kf2 Bh1 42.b4 Rxd4 43.b5 Rg4 44.Ke3 Rxg5

Neutralizing the DSB seems to do the trick

Jul-30-19  jith1207: It's interesting to see that Bacrot didn't seem to have a game with back row mate, among nearly 2000 games at the time of this pun submission in 2013. Maybe, he's got one or few in recent years or someone else has come across a perfect example in his games recently.
Jul-30-19  jinkinson: Like a few others I saw Nc5+ and saw that after either Ka1 or Kc1, Nxb3 is mate, and so figured that was "the answer".
Jul-30-19  King.Arthur.Brazil: Quickly: 30...♘c1+ 31.♖d3 ♗xd3+ 32.♔a1 ♘xb3#
Jul-30-19
Premium Chessgames Member
  monopole2313: Went for the windmill with 30....Nb4+. Like Don Quixote, I find them irresistible.
Jul-30-19  King.Arthur.Brazil: Also 29.♗c3? wouldn't solve the White problem: 29...♘f2 30.♖he1 ♘xd1 31.♖xd1 ♖xb3+ 32.♔a1 ♖bxc3 (avoid the mate with ♖d8#) 33.♘xc3 ♖xc3 and black has a ♗ and 2♙ more. Maybe 29.♖h4 ♔xg7 30.♖xe4 ♘f2 31.♖ee1
♘xd1 32.♖xd1 a5... black has 2♙ and quality. Not 29...♘f2 30.♖xe4 ♘xe4 31.♗e5... when White recovers part of the losen material.
Jul-30-19  AlicesKnight: Not too hard; moving to fork the Rs is tempting but more deadly is ....Nc1+ with mate in a couple.
Jul-30-19  Momentum Man: I got distracted by the discovery check that forks the white rooks, because I forgot black was a rook down
Jul-30-19
Premium Chessgames Member
  Breunor: Computer says:

26 Qf5

1) +0.28 (22 ply) 26...Ne5 27.hxg7 Bxg7 28.Rxh7 Re8 29.Kc1 Rb6 30.Rxg7+ Kxg7 31.Rd7 Qxc3 32.Nxc3 Nxd7 33.Qxd7 Rbe6 34.Qa4 Bxe4 35.Qxa3 Bh1 36.Qb4 Kg8 37.Qf4 Bg2 38.Kb2 Bc6 39.Qd4 Bf3 40.Nd5 Bxd5 41.Qxd5

Jul-31-19  King.Arthur.Brazil: I challanged your computer <Breunor: 6.♕f5 ♘e5 27.hxg7 ♗xg7 28.♖xh7 ♖e8 29.♔c1 ♖b6 30.♖xg7+ ♔xg7 31.♖d7 ♕xc3
32.♘xc3 ♘xd7 33.♕xd7 ♖be6 34.♕a4 ♗xe4
35.♕xa3>
but now: ♖c6 36.♕b4 ♗f5
37.♕f4 ♔g6 38.♕d4 ♖ec8 39.♔b2 ♖xc3
40.♕xc3 ♖xc3 41.♔xc3 ♔xg5 ∓.
If 39.♘e4 ♖xc2+ 40.♔d1 ♖8c7 41.♕b6+ ♖2c6 42.♕b4 ♖d7+ 43.♘d2 ♖cd6 and White loose the ♕+♘ by the 2♖... black win with his ♗. But the main line is: 40.♔b1 ♖8c6
41.♔a1 ♖e2 42.♘c5 ♖e1+ 43.♔b2 ♔xg5

diagram:


click for larger view

Indeed is not so easy to win yet.
My proposal is:
44.♕d8+ ♔g6 45.♕g8+ ♔f6 46.♕d8+ ♔g7
47.♕g5+ ♗g6 48.♘d7 ♖c2+ 49.♔a3 ♖e6
50.♕d8 ♖d2 51.♕f8+ ♔h7 52.♘c5 ♖ed6
The plan is black capture the last White ♙ and promote f7. But this take time...

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