Miguel Illescas vs Marcelino Sion Castro (1990)

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Kibitzing

Miguel Illescas vs Marcelino Sion Castro
Leon (1990), Leon ESP, rd 8, Jun-??
King's Indian Defense: Orthodox Variation (E94) · 1-0

ANALYSIS [x]

FEN COPIED

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Oct-19-16		ceegebe: click for larger view If 37. ... ♔h6 38. ♕f8+ ♔g5 39. ♕e7+ ♗f6 40. ♕f6+ ♔h6 41. ♕g7+ ♔ g5 42. ♖f5+ ♔h4 43. g3+ ♔h3 44. ♘f2+ ♕f2 45. ♖f2

Nov-10-16		An Englishman: Good Evening: Such combinations become easier to find in desperate situations because you're willing to look at anything. Black's interesting opening sacrifice occurs twice in the database; the other is C Lins Rosas vs J Wimmer, 1998.

Nov-10-16		stacase: This is a regular Sherlock Holmes puzzle. That is to say that by the process of elimination, the necessary moves fall into place. White has to say check, and the best candidate is 37. Rxf7+ and Black's King takes the Rook. White respondes with 38. Rf1+ bringing the Rook into play instead of saying check with the queen. Black's responds by interposing the Bishop. Then to get the Knight into play 39. Kte5+ taking advantage of Black's now pinned Bishop. Black runs to g7. White's Queen now says check via 40. Qxb7+ and Black seeing that White's Knight will follow with 41. f7# resigns. Or in other words, "Wham Bam, Thank You "Mam"

Nov-10-16		YouRang: Thursday 37.? click for larger view Knowing it's a puzzle, this was pretty easy. I like to think that even not knowing it's a puzzle I should consider <37.Rxf7+!> and figure out that it wins. After <37...Kxf7> click for larger view Now the obvious move is <38.Rf1+> to (1) bring the rook to join the king attack, and (2) free the Nd3 from the burden of stopping ...Qxc2#. click for larger view By now it's pretty clear that black is in serious trouble. - All king moves get mated quickly by Q+R. Perhaps most fun is <38...Ke7 39.Qf8+ Ke6 40.Qf7+ Kd6 41.Rf6+! Bxf6 42.c5# click for larger view - Blocking with the bishop <38...Bf6> get hit with <39.Ne5+> forking K+R followed by a dropping of black queenside pawns.

Nov-10-16		agb2002: White has a rook and a knight for a bishop and two pawns. Black threatens Qxg2#, gxf5 and Qxd3. The first idea that comes to mind is 37.Rxf7+: A) 37... Kxf7 38.Rf1+ A.1) 38... Ke6 39.Qe8+ Kd6 40.c5+ A.1.a) 40... Bxc5 41.Qd8+ Ke6 42.Nxc5+ Ke5 43.Qxd2 wins. A.1.b) 40... Kd5 41.Qf7+ Ke4 42.Qf3#. A.1.c) 40... Kc7 41.Rf7#. A.2) 38... Ke7 39.Qf8+ A.2.a) 39... Kd7 40.Rf7+ Ke6 41.Qe7#. A.2.b) 39... Ke6 40.Qf7+ Kd6 41.c5+ (or 41.Rf6+ Bxf6 42.c5#) 41... Bxc5 42.Rf6#. A.3) 38... Kg7 39.Qf8+ Kh7 40.Rf7+ Bg7 41.Qxg7#. A.4) 38... Bf6 39.Ne5+ looks winning. For example, 39... Kg7 40.Nxg4 hxg4 41.Qxb7+ Kh6 42.Qxc6 (42.Rxf6 Qd1+ 43.Rf1 Qxf1#) + - [R+P vs B]. B) 37... Kh6 38.Qf8+ B.1) 38... Kg4 39.Qe7+ Bf6 (39... Kh6 40.Rh7#) 40.Qxf6+ Kh6 41.Qh8+ Kg5 42.Qd8+ Kh6 43.Qf8+ Kg5 44.Qe7+ Kh6 45.Rh7#. B.2) 38... Bg7+ 39.Qxg7+ Kg5 40.Qf6+ Kh6 transposes to B.1.

Nov-10-16		dfcx: Both white's rook and knight are hanging. The "obvious" solution to today's puzzle starts with 37.Rxf7+ A. 37...Kh6 38.Qf8+ A1. 38...Kg5 39.Qe7+ Bf6 40.Qxf6+ Kh6 41.Qh8+ Kg5 42.Qd8+ Qh6 43.Qf8+ Kg5 44.Qe7+ Kh6 45.Rh7# A2. 38...Bg7 39.Qxg7+ Kg5 40. Qf6+ same as A1. B. 37...Kxf7 38.Rf1+ B1. 38...Kg7 39.Qf8+ Kh7 40.Rf7+ Bg7 41.Qxg7# B2. 38...Ke6 39.Qe8+ Kd6 40.Qd8+ Ke6 41.Nc5+ Bxc5 (Ke5 42.Qe7#) 42.Qxd2 wins B3. 38...Ke7 39.Qf8+ Ke6 (Kd7 40.Rg7#) 40.Qe8+ same as B2.

Nov-10-16		patzer2: For today's Thursday puzzle (37. ?), White needs a desperate move (a.k.a. desperado) to avoid the dual threat of 37...Qxg2# or 37...gxf5 . The desperado 37. Rxf7+ Kxf7 38. Rf1 + looks promising, and after 38...Bf6 the obvious Knight fork 39. Ne5+ (+4.63 @ 22 depth, Deep Fritz 15) makes short work of spoiling Black's attack and winning the game for White. Although there's no escape for Black after 38. Rf1+ , I found it a bit difficult after 38...Ke6 (diagram below) click for larger view Here (diagram above), I did not see the pretty mate-in-four 39.Qe8+ Kd6[] 40.c5+ Bxc5 41.Qd8+ Ke6 42.Rf6#. P.S.: According to the computer, Black's decisive mistake was <34...Qe2?> allowing 35. Rxf5 (+1.77 @ 23 depth, Deep Fritz 15). Instead, 34...Qe2 = to holds the balance as play might go 34... Qe2 35. Rxf5 h4 36. Qb8+ Re8 37. Qf4 h3 38. gxh3 Be3 39. Qf1 Bxc1 40. Nxc1 Qd2 41. Qg1 Qb4 42. Rf6 Qxc4 43. Qd1 Re3 44. Rf1 Kg7 45. Kg2 b5 46. Qd6 Re6 47. Qa3 Qd5+ 48. Qf3 Qxf3+ 49. Rxf3 Re4 50. Rc3 Rxa4 (-0.57 @ 21 depth, Deep Fritz 15).

Nov-10-16		morfishine: An "only-move" no-brainer

Nov-10-16		Cheapo by the Dozen: Poor starting point for the puzzle. The first two moves were quite obvious once one noticed the straits White was in. Most of us would have played them in blitz and a slow game alike.

Nov-10-16		saturn2: Mate is looming so Rxf7 and then Rf1+

Nov-10-16		mel gibson: Easy move to make - there was no other move.

Nov-10-16		patzer2: Correction: Black's decisive mistake was <34...Qd2?>

Nov-10-16		AlicesKnight: With R up but mating threats against him White must open Black up and check; so 37.Rxf7+ Kxf7 (...Kh6 doesn't look helpful); 38.Rf1+ and various options seem to lead to 'White wins'.

Nov-10-16		leRevenant: four out of four

Nov-10-16		schachfuchs: Yes, knowing it's a puzzle 37.Rxf7+ and 38.Rf1+ is almost automatic. However, I would have surely not seen that OTB at move 35.Rxf5 !

Nov-10-16		drollere: since black threatens 37. ... Qxg2#, this is one of those "keep the checks coming" kind of positions. so 37. Rxf7+ is the only choice. then, after 37. ... Kxf7, 38. Rf1+ brings the other R into action and creates a Q checkpost at f8. the black K is mated if it flees to g7, and we learn that 38. ... Bf6 is useless, so the variations for white to work out arise from Ke6.

Nov-10-16		Pedro.Akcio: yes. I only missed Bf6, but that's not a problem, the position is winning already...

Nov-10-16		kevin86: White puts black in trouble in a hurry.

Nov-10-16		Jimfromprovidence: For those wanting more, have the puzzle begin after 36 Qb8+ but with 36...Kh7 37 Rxf7+ Bg7 to follow. click for larger view White to play and win.

Nov-10-16		agb2002: <Jimfromprovidence: For those wanting more, have the puzzle begin after 36 Qb8+ but with 36...Kh7 37 Rxf7+ Bg7 to follow.> I don't know whether 38.Rxg7+ Kxg7 39.Qe5+ wins, trying to reach f3 with tempo, but 38.Rg1 Qxd3 39.Qe5 looks crushing (39... Qd4 40.Rxg7+, etc.).

Nov-10-16		Jimfromprovidence: <agb2002> <I don't know whether 38.Rxg7+ Kxg7 39.Qe5+ wins, trying to reach f3 with tempo, but 38.Rg1 Qxd3 39.Qe5 looks crushing (39... Qd4 40.Rxg7+, etc.).> Yes, I posted this line because there are two ways to win. In this case white has both 38 Rg1 and 38 Rxg7+. 38 Rxg7+ seems to require more thought.

Nov-10-16		RandomVisitor: If 33...Qa2! black would be winning: click for larger view Komodo-10.1-64bit: -3.43/34 34.Rbc1 h4 35.Qb8+ Kg7 36.h3 Qa3 37.Rcd1 Qxa4 38.Qc7 Qxc4 39.Qxa5 b5 40.Qd2 Qc3 41.Qxc3 Bxc3 42.Rc1 b4 43.Nc5 Re2 44.Rcd1 Re3 45.Rc1 Bf6 46.Rf3 Rxf3 47.gxf3 Bxh3 48.Ne4 Bd7 49.Rb1 Be7 50.Rc1 g5 51.Kg2 Kh6 52.Nc5 h3+ 53.Kg3 Bd6+ 54.Kf2 Bxc5+ 55.Rxc5 b3 56.Rc1 f6 57.Kg3 Kh5 58.Rb1 Be6 59.f4 gxf4+ 60.Kxf4 c5 61.Kg3 c4 -3.98/34 34.Rbd1 h4 35.Qb8+ Kg7 36.h3 Qxa4 37.Qd6 Qxc4 38.Nf2 Be5 39.Nxe4 Bxd6 40.Nxd6 Qe6 41.Rfe1 Qb3 42.Nxf5+ gxf5 43.Ra1 b6 44.Rab1 Qg3 45.Rf1 b5 46.Rxf5 a4 47.Rbf1 Qc7 48.Rg5+ Kf8 49.Rc1 b4 50.Rg4 Qe7 51.Rxc6 Qe1+ 52.Kh2 Qe5+ 53.Kh1 a3 54.Ra6 Qa1+ 55.Kh2 b3 56.Ra8+ Ke7 57.Re4+ Kd6 58.Re3 a2 59.Rxb3 Qe5+ 60.Kg1 a1Q+ 61.Rxa1 Qxa1+ 62.Kh2 Qe5+ 63.Kg1 f5 64.Rd3+ Kc5 65.Kf2 -4.57/34 34.Qb8+ Kg7 35.Qd6 Qxc4 36.Rxf5 gxf5 37.Qg3+ Kh6 38.Qf3 Qc2 39.Rf1 Qe2 40.Qxe2 Rxe2 41.g3 Rd2 42.Nc1 Bc3 43.Nb3 Rb2 44.Nc5 Kg5 45.Rf3 Bg7 46.Rf4 b5 47.Nd3 Ra2 48.axb5 cxb5 49.h4+ Kf6 50.Rf1 b4 51.Rb1 Ke7 52.Nxb4 axb4 53.Rxb4 Rb2 54.Rf4 Ke6 55.Rf3 Be5 56.Rd3 Ra2 57.Kg1 Rc2 58.Kf1 Rb2 -4.61/34 34.Rbe1 h4 35.Qc7 h3 36.gxh3 Qc2 37.Qd8+ Kg7 38.Rxf5 Qxd3 39.Rg1 Qc3 40.Qxa5 Qxh3 41.Rxf7+ Kxf7 42.Qc7+ Kg8 43.Qg3 Qxg3 44.Rxg3 Kf7 45.Rd3 b6 46.h3 Bc5 47.Rd7+ Ke6 48.Rg7 Kf6 49.Rc7 Rxc4 50.Rxc6+ Kf5 51.Rc7 Rxa4 52.Rf7+ Ke6 53.Rg7 Kf6 54.Rd7 Ra2 55.Rd8 Kf5 56.Rd7 Kf4 57.Rg7 g5 58.Rd7 Kg3 59.Rd3+

Nov-10-16		RandomVisitor: After <patzer2>'s 34...Qe2: click for larger view Komodo-10.1-64bit: 0.00/45 35.Rxf5 h4 36.Qg5 Qxd3 37.Rf3 Qxc4 38.Rcf1 Bg7 39.h3 Be5 40.Qd8+ Kg7 41.Qe7 Bf4 42.Qxh4 f5 43.Qd8 Be5 44.g4 Qc2 45.Qe7+ Kg8 46.Qe8+ Kg7 47.Qd7+ Kh8 48.Qd8+ Kh7 49.Qe7+ Kh8 50.Qf8+ Kh7 51.Qe7+

Nov-10-16		Bubo bubo: White is up a rook against two pawns, but he faces serious threats, especially Qxg2#. Since White has no convincing way to protect g2, the first move is easy: 37.Rxf7+!, and now A) Refusing the sac does Black no good: 37...Kh6 38.Qf8+ with mate after either A1) 38...Kg5 39.Qe7+ Bf6 (or Kh6 40.Rh7#) 40.Qxf6+ Kh6 41.Qh8+ Kg5 42.Qd8+ Kh6 43.Qf8+ Kg5 44.Qe7+ Kh6 45.Rh7# or A2) 38...Bg7 39.Qxg7+ Kg5 40.Qf6+ and further as in A1). Therefore Black has to capture, and after 37...Kxf7 38.Rf1+ Black must either B) flee with his king or C) block the check: B1) 38...Kg7 39.Qf8+ Kh7 40.Rf7+ Bg7 41.Qxg7# B2) 38...Ke6 39.Qe8+ Kd6 40.Qd8+ Ke6 41.Nc5+ Ke5 42.Qe7# or 41...Bxc5 42.Qxd2 B3) 38...Ke7 39.Qf8+ Kd7 40.Rf7+ Ke6 41.Qe7# or 39...Ke6 40.Qe6+ and further as in B2) C) Since blocking the check on f2 or f4 is pointless, we only have to consider 38...Bf6. I do not see a mate here, but now White can remove Black's mate threat: 39.Ne5+ Ke6 40.Nxg4. If Black does not recapture, he is still down a rook with all his threats having evaporated. But after 40...hxg4 41.Qxb7 White will also win the Pc6 thanks to the skewer threat Qc6+; and so he will be up the exchange, a pawn, and a safer placed king. A really nice Thursday puzzle!

Nov-11-16		patzer2: <RV> Thanks for showing the win Black missed with 33...Qa2! . This strong (Saturday or Sunday level) move (i.e. 33...Qa2!) is clearly better than the game continuation <33...Qc2 34. Rbc1 Qd2?> (better was 34...Qe2 =) <35. Rxf5 >. After 33...Qa2! 34. Rbc1 h4! 35. Qc7 (diagram below), click for larger view Black has protected the Black Queen from harassment by the White Rook and gained a critical tempo needed to drive the White Queen out of play. Here (diagram above) Black defends her King and starts to mop up White's Queen side pawns with 35...Qxc4 [-3.74 @ 20 depth, Deep Fritz 15 (diagram below)] click for larger view From there (diagram above), Black will win decisive material as White attempts to stop the advance of Black's passed pawn(s).

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