Nicolas Mayorga vs Emilio Cordova (2007)

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Nicolas Mayorga vs Emilio Cordova
III South American Ch U20 (2007), Buenos Aires ARG, rd 1, Feb-06
Sicilian Defense: Nezhmetdinov-Rossolimo Attack. Fianchetto Variation (B31) · 0-1

ANALYSIS [x]

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Apr-10-07		Inf: wow! 29...Bh2+! nice move! this kid has talent

Oct-23-21		Brenin: Black wants to play the exchange sacrifice Rxf3, to open up White's K-side, but his B is in the way. The most forcing way to remove it is 29 ... Bh2+, e.g. 30 Kxh2 Rxf3 31 gxf3 (otherwise 31 ... Rfxf2) Rxf2+ 32 Kg1 Qxf3, with mate on g2 unless 33 Qa8+ Qxa8 34 Kxf2 Qxa2, but now Black's extra Ps and White's exposed K give Black a winning advantage. If 30 Kf1 or Kh1 then Rxf3 anyway, and if 30 Nxh2 then Rfxf2, all even worse for White.

Oct-23-21		raymondhow: Bah, I pushed the pawn which comes to nothing.

Oct-23-21		Refused: Nice puzzle. With one Rook on the 2nd rank black very much want to clear it and bring the White King to justice with all the heavy pieces already gathered. Rxf2 and Rxf3 are very much the moves I'd like to play as black. So, let's see how we can get there. 29...Bh2+!! is the move that gets us there. a) 30.Nxh2 Rfxf2 is resignable b) 30.Kxh2 Rxf3 now white has some unpleasent choices to make. turning down the sac allows Rxf2 and g2 is the next problem white has to fix. Accepting the rook with 31.gxf3 Rxf2+ 32.Kg1 Qxf3 looks dead, too. Ah, I see White went with 30.Kxh2 Rxf3 31.gxf3 Rxf2+ 32.Kg1 Qxf3 33.Qa8+ I admit I missed this counter sacrifice to keep the game going a bit longer. Qc4-Qh4 is very good technique Cordova.

Oct-23-21		Counterpoint: I argue 29...Bg3 is stronger.

Oct-23-21		nalinw: Is it actually Saturday? I got the moves played - but there were many other possibilities ....

Oct-23-21		stacase: Ha ha ha ha ha ha! I missed 33...Qxa8

Oct-23-21		An Englishman: Good Evening: What about 29...Bg3; 30.fxg3,Rxf3 as an alternative? Does 31.Rd2 refute?

Oct-23-21		mel gibson: I saw that in only about 10 seconds. Stockfish 14 says: 29... Bh2+ (29. .. Bh2+ (♗f4-h2+ ♔g1xh2 ♖f8xf3 g2xf3 ♕c6xf3 ♖d1-d2 ♕f3-f4+ ♔h2-g2 ♖c2xd2 ♕a5-a8+ ♔g8-f7 ♕a8-f3 ♕f4xf3+ ♔g2xf3 ♖d2xb2 ♖e1-d1 d3-d2 a2-a3 ♖b2-a2 ♔f3-g2 ♔f7-g7 h3-h4 ♔g7-h6 a3-a4 ♖a2xa4 ♖d1xd2 ♖a4xh4 ♖d2-d7 ♔h6-g5 ♖d7xe7 ♔g5-f5 ♖e7-f7+ ♔f5xe5 ♔g2-g3 ♖h4-h5 f2-f3 ♔e5-d6 ♖f7-g7 ♖h5-g5+ ♔g3-f4 h7-h6 ♔f4-e4 ♖g5-g1 ♖g7-h7 ♖g1-h1 f3-f4 e6-e5 f4xe5+ ♔d6-e6 ♔e4-f4 ♖h1-h5 ♔f4-g3 ♖h5-g5+ ♔g3-h4 ♖g5-g1 ♖h7-b7 ♔e6-f5 ♖b7-f7+ ♔f5xe5 ♖f7-a7 ♖g1-h1+ ♔h4-g3 h6-h5 ♖a7-a6 ♖h1-d1 ♔g3-h3 ♖d1-d3+ ♔h3-h4) +3.51/41 156) score for Black +3.51 depth 41.

Oct-23-21		Brenin: <Counterpoint>, <An Englishman>: Isn't 29 ... Bg3 refuted by 30 Rd2, e.g. 30 ... Rxf3 31 gxf3 Qxf3 32 Rxc2 dxc2 33 Qd2 and 34 Qxc2 ? I think Black has at best a draw after this.

Oct-23-21		Mephisto: Screw Stockfish, ...29. Bh2+! clears the line for the Rook on f8 threatening the N on f3.

Oct-23-21		Teyss: The difficulty here is seeing the best defence 33.Qa8+ (which I didn't) and what to do after 34...Qxa2. From there on White didn't play the best moves by far, should have removed the P with 35.Rxd3 Qxb2+ 36.Re2. Now Black has an advantage with Q+2P vs 2R and the White Ps are weak but it's a long way to Tipperary. After a few inaccuracies the final blunder was 37.Rh1? losing one of the Rs e.g. 37...Qg5+ 38.Kxd3 Qf5+ 39.Ke3 (Kc3 Qf3+; Kc4 or Ke2 Qe4+; Kd4 Qf4+ 40.Kc3 or Kd3 Qf3+) Qxe5+ 40.Kf3 Qf5+ 41.Ke3 Qg5+ 42.Ke2 Qg2+ or Kd3 Qd5+.

Oct-23-21		agb2002: Black has a bishop for a knight and a pawn. White threatens Rxd3. The bishop blocks the rook on f8. This suggests Bh2+ and Bg3. In the case of 29... Bxh2+: A) 30.Nxh2 Rfxf2 31.Nf3 Rxg2+ 32.Kh1 (32.Kf1 Qxf3#) 32... Rh2+ 33.Kg1 Rcg2+ 34.Kf1 Qxf3#. B) 30.Kxh2 Rxf3 B.1) 31.gxf3 Qxf3 (31... Rxf2+ 32.Kg1 Qxf3 33.Qa8+ Qxa8 34.Kxf2 Qxa2 35.Rd2, unclear) B.1.a) 32.Rd2 Qf4+ followed by 33... Rxd2 and Kf7 looks very good for Black. B.1.b) 32.Rf1 Rxf2+ 33.Rxf2 Qxf2+ 34.Kh1 Qf3+ 35.Kh2 Qxd1, followed by Qe2 and d2, looks winning. B.1.c) 32.Qb6 Rxf2+ 33.Qxf2 Qxf2+ 34.Kh1 Qg3 looks good for Black. For example, 35.Ra1 Qxh3+ 36.Kg1 g5 36.a4 g4 37.Red1 (37.a5 g3) 37... Qg3+ 38.Kf1 Qf3+ 39.Kg1 g3 40.Rd2 (40.Rf1 Qe2) 40... Qe3+ 41.Kg2 Qxd2+ 42.Kxg3 Qxb2 wins. B.2) 31.Rf1 Rfxf2 32.Rxf2 Rxf2 33.Rg1 d2 34.Qd8+ Kf7 B.2.a) 35.Qh8 Qe4 (35... Rxg2+ 36.Rxg2 d1=Q 37.Rf2+) 36.Qxh7+ Ke8 37.Qg8+ Kd7, followed by Rxg2+, looks winning. B.2.b) 35.Qd4 Qf3 36.Kh1 (due to 36... d1=Q 37.Qxd1 Rxg2+) 36... Rxg2 37.Rxg2 d1=Q+ wins decisive material. C) 30.Kf1 Rxf3 31.gxf3 Qxf3 with the double threat Qh1# and Qxf2#. D) 30.Kh1 Rxf3 D.1) 31.gxf3 Qxf3+ 32.Kxh2 Rxf2+ 33.Kg1 Qg2#. D.2) 31.Kxh2 Rfxf2 32.Rg1 Rxg2+ and mate next. ----- In the case of 29... Bg3 30.fxg3 Rxf3 31.gxf3 Qxf3 32.Qd8+ Kg7 (32... Kf7 33.Rf1) 33.Qxe7+ Kh6 34.Qh4+ Kg7 35.Qe7+ and perpetual check.

Oct-23-21		agb2002: I missed a mate in two in the line for 29... Bg3: 32... Kf7 33.Rf1 Rg2+ 34.Kh1 Rf2+ 35.Kg1 Qg2#.

Oct-23-21		chrisowen: O I uvray etc Bh2+ gimmy axiom key i ji afford key x pad key o i uvray etc bails it salt key alter trich hormones key i blast charm i key chimney mo i uvray it vanquish fends it jeeps it pogo gnaw its wink quiz its book i key us its zinc leo rot ham would i key pig key i cement decreed it hub agains hibiscus hog batch chubb i bug farms hen its hard ok it haggle leed it vint dc fane it c hog rag key ie ha finn bfg grubber gi key u bag c napalm ego difficult a gruff iu key quiff coddle hopper fog c v it oil female key o ay it grow do finger key i safe glass c doyen flagger flood credited key ie Bh2+ brush.

Oct-23-21		chrisowen: Bitching plan etc key mother it is earth coil as ie key groan may door it vanquish key no h2 jah.

Oct-23-21		chrisowen: I’m other threes a crowd british key stiff upper lip key i giddy on ay a rustic maneuver up a duff chore h2.

Oct-23-21		Stanco: It took me literally a glimpse! Bh2+! Brazilian Jiu Jitsu way to break the close guard.

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