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Fabian Alejandro Ponzo vs Hernan Miranda
Villa Ballester LV op (2005), rd 1, Jan-05
English Opening: Anglo-Indian Defense. Queen's Knight Variation (A16)  ·  0-1



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Kibitzer's Corner
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Premium Chessgames Member
  piltdown man: Miranda exercised his rights.
Premium Chessgames Member
  al wazir: 25...Re1 also wins:

A) 26. Bg2 Rxf1+ 27. Bxf1 Qf3+ 28. Bg2 Re1+ 29. Qxe1 Qxg2#.

B) 26. Qf2 Rxf1+ 27. Qxf1 Qxf3+ 28. Qxf3 Re1+ 29. Qf1 Rxf1#.

C) 26. Qxe1 Qxf3+ 27. Rxf3 Rxe1+ 28. Rf1 Rxf1#.

D) 26. Qxd4 Rxf1+ Qg1 Qxf3+ 27. Kg1 Qg2#.

E) 26. Rxe1+ Qxf3+ 27. Qg2 Qxg2#.

Mar-03-15  M.Hassan: "Easy"
Black to play 25...?
Black is a pawn up
Two Black Bishops are "eyeing" towards White King's camp, e file is at the sole control of Black doubled Rooks and unconnected White Rooks fail to protect Black King. It is time for a sacrifice:

26.Rxf3(forced) Re1+
27.Qxe1 Rxe1+
28.Rf1 Rxf1#

Premium Chessgames Member
  agb2002: Black has the bishop pair and one pawn for a bishop and a knight.

White threatens 26.Bxh5.

The rook on f1 is overburdened with the defense of the bishop and the back rank. Therefore, 25... Qxf3+ 26.Rxf3 (else mate next) 26... Re1+ and mate in two.

Another option is 25... Re1:

A) 26.Rxe1 Qxf3+ and mate next.

B) 26.Qxe1 Qxf3+ 27.Rxf3 Rxe1+ and mate next.

C) 26.Bg2 Rxf1+ 27.Bxf1 Qxd5+ 28.B(Q)g2 Bxg2+ 29.Q(B)xg2 Re1#.

D) 26.Rxe1 Qxf3+ and mate next.

E) 26.Nd3 Qxf3+ and mate next.

Mar-03-15  Olsonist: Forced feast.
Mar-03-15  gofer: There are two ways to win this one...

The easy way...

25 Qxf3+ Rxf3 (Qg2 Bxg2#/Qxg2#)
26 Re1+ Qxe1 (Rf1 Rxf1#)
27 Rxe1+ Rf1
28 Rxf1#

and the (very) hard way...

25 Re1 ...

25 ... Bxh5 26 Rxf1#

25 ... Na2/Nb3/Nd3/Ne2 26 Qxf3+ mating

25 ... Qxd4 26 Rxf1+ Qg2 27 Qxf3#

25 ... Qe2/Qf2/Qg2 26 Rxf1+ Qxf1+ 27 Qxf3+ Qxf3 28 Re1+ Qf1 29 Rxf1#

25 ... Rxe1 26 Qxf3+ Qg2 27 Qxg2#

25 ... Qxe1 26 Rxe1 Bg2 27 Rxf1+ Bxf1 28 Qf3+ Bg2 29 Bxg2#/Qxg2#


So yes we have a <"Forced Feast"> or an <"Optional Opiate">...

Premium Chessgames Member
  Once: Fritzie confirms that 25...Qxf3+ is mate in 4 and 25...Re1 is mate in 5. In fact, just about any sensible move wins from here.

One amusing line is 25... Bxf1 26.Bxh5 Re1 27. Nb3 Rxa1 28. Nxa1 gxh5 29. Nb3 Re2 30. Qxe2 Bxe2

Mar-03-15  morfishine: <25...Qxf3+> forces mate: 26.Rxf3 Re1+ 27.Qxe1 Rxe1+ 28.Rf1 Rxf1#

<25...Re1> also wins, but is slower

Even <25...Bxf1> wins as pointed out by <Once>

I guess the puzzle oughtta be to find what doesn't win


Mar-03-15  CHESSTTCAMPS: Black has an extra pawn, an active bishop pair, and control of the open e-file. White threatens 26.BxQ, but the weak back rank is fatal. Black can finish with a forcing combination: 25...Qxf3+ 26.Rxf3 (Qg2 Qxg2#) Re1+ 27.Qxe1 Rxe1+ 28.Rf1 Rxf1#
Mar-03-15  TheaN: Tuesday 3 March 2015 <25....?>

White thought attacking the black queen to lure her away was a good idea to bolster his king's defenses, but in fact it just weakens it.

It's mate after <25....Qxf3+! 26.Rxf3 (Qg2 Bxg2#) Re1+ 27.Qxe1 (Rf1 Rxf1#) Rxe1+ 28.Rf1 Rxf1# 0-1>. It is logical that Re1 works as well, as it basically brings in the rook a move earlier, but it's amusing that Bxf1 also wins. Kind of shows white's position was not good to begin with.

Note that after black's 24....Qh5! white does have a problem: it paralyzes the recently posted c1-knight. Unable to develop the knight to b3 (25.Nb3 Re2 ) white is unable to defend against the back rank pressure.

That said, I'd say white's real troubles started as early as 12.Bh6? which allows black to fire the Nxe4! tactic winning the crucial e-pawn and weakening white's position.

Mar-03-15  zb2cr: Amte in4, beginning with 25. ...Qxf3+; 26. Rxf3, Re1+; 27. Qxe1. (The only alternative, 27. Rf1, leads to immediate mate by 27. ... Rxf1#.) But after 27. ... Rxe1+; 28. Rf1, Rf1# is mate anyway.

As pointed out above by several commentators, Black's powerfully posted Bishops are a key factor. Another is the White Knight on c1, which blocks off the White Rook. This renders White's back rank vulnerable.

Premium Chessgames Member
  Penguincw: Easy. 25...Qxf3+ (26.Qg2 Qxg2# 0-1) 26.Rxf3 Re1+ 27.Qxe1 Rxe1+ 28.Rf1+ Rxf1# 0-1.

Yesterday, was a mate in 2, today a mate in 4, so anyone predicting a mate in 6 or 8 tomorrow?

Premium Chessgames Member
  Bubo bubo: White's back rank is weak, since ♖a1 is blocked by the knight. Black deflects the other rook:

25...Qxf3+ 26.Rxf3 Re1+ 27.Qxe1 Rxe1+ 28.Rf1 Rxf1# or 26.Qg2 Qxg2#

Premium Chessgames Member
  gawain: Of the different good options for Black, best is 25...Qxf3+ which quickly forces mate. With the previous move 24,,, Qh5 what was Black threatening? was Black simply luring White to play 25 Bf3?
Mar-03-15  Mating Net: All 5 Black pieces are in prime time attacking position, White's look like they are on holiday. No wonder there are multiple solutions.
Mar-03-15  TheTamale: 25) Bf3 would be a devastating blunder to make, because it seems innocuous enough, but the truth of it is readily apparent as soon as Black takes the bishop with his queen. A very nice Tuesday puzzle.
Mar-03-15  starry2013: The rook on f1 seems to hold it, so the queen sacrifice forces it out of position. The two rooks staring down the file always look like they will play a big role and the bishops cast the mating net.
Premium Chessgames Member
  Gypsy: It looks to me that White was lost, for practical purposes, after the <12.Bf6?...> already. He immediately dropped a key central pawn and White position, from that point on, started to look like Swiss cheese. Black attack practically played itself.
Mar-03-15  BOSTER: When Miranda (black) saw that a new client Bishop h6 came in his office (diagram).

click for larger view

He after small hesitations 12...b4 13.Nd1 returned white his first investment for building the nice chain g2-f3-e4-d5 with % playing 13...Nxe4 (Knight only for pawn, but with the threat),and then after 14.Bxe4 Qh4+ 15.g3 accepted the new investment(Bh6) Qxh6 (diagram) and took Ponzo (white) in Ponzi Club, putting the profit (the pawn) in his pocket.

click for larger view

The rest was a matter of a technique.

Premium Chessgames Member
  kevin86: Mate in four begins with a queen sac.

25...♕f3+ 26 ♖xf3 ♖e1+ 27 ♕xe1 ♖xe1+ 28 ♖f1 ♖xf1#

Mar-03-15  Gilmoy: <4..c5 5.d5 6..e6> transposes to a Benoni? Ergo, <24.Nc1> is a loser, allowing the <thematic Benoni check> -- which can cause King-in-a-corner syndrome ...
Mar-03-15  dfcx: 25...Qxf3+ forces mate
25.Kg1 Qxf1#
25.Rxf3 Re1+ 26.Qxe1 Rxe1+ 27.Rf1 Rxf1#
Premium Chessgames Member
  perfidious: <Ponzo Scheme>
Premium Chessgames Member
  patzer2: Here's a look with the Opening Explorer and Fritz 12:

<1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 c5 5. d5> This move, 5. d5, is by far the most popular here.

Interesting and relatively untested is 5. dxc5!?. In the only game with 5. dxc5!? in the OE, M Lauberte vs Zezina, 1954, the position quickly leveled out after 5. dxc5!? Qa5 6. Qa4+? Qxa4 7. Nxa4 Nxe4 =. However, that's only because White overlooked the stronger possibility 5. dxc5!? Qa5 6. cxd6! Nxe4 7. Qd5! .

Fritz 12 gives best play as 5. dxc5!? dxc5 (5...Qa5 6. cxd6! Nxe4 7. Qd5! ) 6. Qxd8+ Kxd8 7. Nf3 Bg7 8. Be3 b6 9. 0-0-0+ .

<5..Bg7 6. f3> Here I prefer the popular 6. Nf3 which made its debut in Capablanca vs Mieses, 1913. Also worthy of consideration is 6. Nge2 as recently employed for a win in D Martinez Martin vs D Kuhne, 2015.

<6...0-0 7. Be3> Most popular is 7. Bg5 as in White's win in Carlsen vs E Inarkiev, 2014.

<7...e6!> Fritz indicates this is equal, but the results of 110 games in the OE, with 49% wins for Black and only 21% wins for White, suggest the position favors Black.

<8. Qd2 exd5 9. cxd5 a6 10. Bd3> This game is the only one in the OE with the move 10. Bd3. It may not be too awfully bad, but my preference here is 10. a4 as in White's win in J Sriram vs S Narayanan, 2009

Premium Chessgames Member
  patzer2: <10...b5 11. Nge2 Nbd7 12. Bh6 b4! 13. Nd1?> This makes the win way too easy for Black.

Instead White can put up much resistance with 13. Bxg7 when strong play might continue 13...bxc3! 14. Qh6 cxb2! 15. Rb1 Qa5+! 16. Kf2 Rb8! (16... Re8 17. Rxb2 c4! 18. Bc2 =) 17. Bxf8 Nxf8 18. Qf4 Ne8 19. e5 Nd7 20. exd6 f6 21. Rhd1 Ne5 22. Ng3 c4 23. Bc2 Qc3 24. Qd2 Qxd2+ 25. Rxd2 c3 26. Rd4 Nxd6 27. Ne4 Ndc4 28. Nxc3 Na3 29. Be4 Nxb1 30. Bxb1 Bf5 31. Bxf5 gxf5 32. f4 Ng4+ 33. Ke2 Nxh2 34. Rd1 Kf8 35. Kd3 Ng4 36. Rb1 Rb4 37. g3 Nf2+ 38. Kc2 Ke7 39. Rxb2 Rxb2+ 40. Kxb2 Ne4 41. Ne2 Kd6 42. Kb3 Kxd5 43. Kb4 h5 44. Ka5 Kc4 45. a4 Kd3 46. Ng1 Ke3 47. Kb6 Kf2 48. Kxa6 Nc5+ 49. Kb5 Nxa4 50. Nh3+ Kxg3 51. Ng5 h4 52. Kxa4 Kxf4 53. Ne6+ Kg4 54. Nc5 h3 55. Nd7 h2 56. Nxf6+ Kg3 57. Nh5+ Kf2 .

<13... Nxe4!> This double attack tactic wins back the piece and a pawn, while leaving Black with a disorganized and lost position. This also begins the combination which sets up the Tuesday (25...?) puzzle.

<14. Bxe4 Qh4+ 15. g3 Qxh6 16. f4 Nf6 17. Bg2 Bh3 18. O-O Ng4 19. Nf2 Nxf2 20. Rxf2 Rfe8 21. Rff1> If 21. Bxh3, then Black wins after 21...Qxh3 when play might continue 22. Rd1 Re4 23. Qd3 Rae8 24. b3 Qh5 25. Rd2 Re3 26. Qxa6 Bc3 27. Rc2 Qxd5 28. Rf1 Bd2 29. Qc4 Qxc4 30. bxc4 Rxe2 31. Rf2 Re1+ 32. Kg2 Bc3 .

<21... Re7 22. a3 Rae8 23. Nc1 Bd4+ 24. Kh1 Qh5 25. Bf3>

If 25. Bxh3, then Black wins after 25...Qxh3 when play might continue 26. Qg2 Qxg2+ 27. Kxg2 Bxb2 28. Ra2 Bxa3 29. Kf2 c4 30. Rc2 b3 31. Rxc4 b2 32. Nd3 Re2+ 33. Kg1 Rd2 34. Rc3 Ree2 35. Rb1 Rg2+ 36. Kh1 Rxh2+ 37. Kg1 Rdg2+ 38. Kf1 Rxg3 39. Rc8+ Kg7 40. Ne1 Bb4 41. Rc2 Rh1+ 42. Kf2 Bxe1+ 43. Rxe1 Rxe1 44. Rxb2 Reg1

<25...Qxf3+ 0-1> This solves our Tuesday puzzle and forces Black's resignation in lieu of 26. Rxf3 Re1+ 27. Qxe1 Rxe1+ 28. Rf1 Rxf1#.

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