chessgames.com
Members · Prefs · Laboratory · Collections · Openings · Endgames · Sacrifices · History · Search Kibitzing · Kibitzer's Café · Chessforums · Tournament Index · Players · Kibitzing

Marcio Melgosa vs Oscar Humberto Castro Rojas
Barranquilla Carnaval Cup 10th (1999), Barranquilla COL, rd 4
Center Game: Berger Variation (C22)  ·  0-1
ANALYSIS [x]

FEN COPIED

explore this opening
find similar games 117 more games of O Castro
sac: 13...Rxd2 PGN: download | view | print Help: general | java-troubleshooting

TIP: You can make these tips go away by registering a free account then visiting your preferences page. Simply check the option "Don't show random tips on game pages." and click the Update Profile button at the bottom.

PGN Viewer:  What is this?
For help with this chess viewer, please see the Olga Chess Viewer Quickstart Guide.
PREMIUM MEMBERS CAN REQUEST COMPUTER ANALYSIS [more info]

Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Jul-15-15
Premium Chessgames Member
  whiteshark: What's wrong with <28...Nxc3 29. bxc3 Qa3+>? After 30.Kb1 Rxc3 is winning and after 30.Kd1 Qa1+ 31.Qc1 Rd3+ 32.Rd2 Ne3+ is winning, too.
Jul-15-15  saturn2: @whiteshark: White does not retake after 28..Nxc3 but fork Queen and Rock with 29 Nf5
Jul-15-15
Premium Chessgames Member
  morfishine: White has one threat 29.Nf5, so Black must move quickly: <28...Rxc3> pinning White Queen, but after 29.bxc3 Qa3+ both White's responses lose: (1) 30.Kd1 Ne3+ forking or (2) 30.Kb1 Nc3+

Black control of <d2> & <b2> makes this work

*****

Jul-15-15
Premium Chessgames Member
  whiteshark: <saturn2> Thanks!

D'oh! I suffered from tunnel vision and counter-tactics striked back again.

Jul-15-15  Nick46: I got it today after getting out the bits of wood. I agree with Phony Benoni and am surprised by diagonalley, whom I consider a few ELO brownie points above me.
Jul-15-15  zb2cr: Found this one only after wasting time with 28. ... Nxa3.
Jul-15-15  starry2013: I thought of the knight sacrifice very quickly, after seeing moving the other knight would go nowhere. The variations against the computer probably weren't as concise as they should be (had to get my king safe), but I won...

Nxc3 2.bxc3 Qxa3+ 3.Kb1 Rxc3 4.Re1 g6 5.Re8+ Kg7 6.Qxc3 Qxc3 7.Nf3 Na3+ 8.Ka2 b4 9.Ree2 Nc4 10.Nd4 a4 11.Rb2 Nxb2 12.Rxb2 b3+ 13.Nxb3 axb3+ 14.Rxb3 Qc4 15.f5 d5 16.fxg6 fxg6 17.Kb2 Qxb3+ 18.Kxb3 Kf6

Nxc3 2.bxc3 Qxa3+ 3.Kb1 Rxc3 4.Re2 g6 5.Re8+ Kg7 6.Qe2 Qb4+ 7.Nb3 Qxb3+ 8.Ka1 Rc2 9.Qxc2 Qxc2 10.Re2 Qxe2 11.Rb1 a4 12.f5 a3 13.Rb4 Qd2 14.f6+ Kxf6 15.g5+ Kxg5 16.h4+ Kxh4 17.Rb3 Qd1+ 18.Ka2 Nd2

Nxc3 2.bxc3 Qxa3+ 3.Kb1 Rxc3 4.Re2 g6 5.Re8+ Kg7 6.Qa2 Qb4+ 7.Ka1 Ra3 8.Re2 Rxa2+ 9.Kxa2 Qa3+ 10.Kb1 Qd3+ 11.Ka2 Qxd4 12.f5 Qd3 13.Rf2 f6 14.fxg6 hxg6 15.Rfh2 b4 16.Ka1 b3 17.Rb1 a4 18.Rhb2 Na5

Jul-15-15
Premium Chessgames Member
  patzer2: <whiteshark><saturn2> After 28...Nxc3 29. Nf5 (diagram below)


click for larger view

I also though Black was busted, but Deep Fritz 14 x 64 @ 24 depth indicates it's a win for Black (diagram above) with 29...Qe6! or 29...Qc5! :

1. (-4.54): 29...Qe6 30.bxc3 Re1+ 31.Rxe1 Qxe1+ 32.Qd1 Qxf2 33.Qxd7 Qxf4+ 34.Kd1 Qf1+ 35.Kc2 Qf2+ 36.Kc1 h5 37.Ne7+ Kh7 38.Qd8 Qg1+ 39.Kc2 Qg2+ 40.Kc1 Qb2+ 41.Kd1 Qb1+ 42.Ke2 Qe4+ 43.Kf2 Qf4+ 44.Ke2 Qe5+ 45.Kf2

2. (-4.28): 29...Qc5 30.Rd2 Nxa3 31.Nxe3 Nxc2 32.Nxc2 Nd5 33.Re1 g6 34.f5 b4 35.Kb1 b3 36.Nd4 Qb4 37.Kc1 Qa4 38.Kd1 Nf4 39.Re8+ Kg7 40.Ne2 Nxh3 41.fxg6 hxg6 42.Rxd7 Qa1+ 43.Kd2

P.S.: So if Fritz is correct, three moves which solve our Wednesday puzzle are 28...Rxc3!! (-9.14 @ 21 depth), 28...Nxc3! (-4.60 @ 21 depth) and 28...Nxa3 (-2.61 @ 21 depth).

Jul-15-15  dfcx: Black is down an exchange with N+P for Rook.

The white king is caged in the back rank.

28...Rxc3 29.bxc3 (or lose the queen) Qxa3+

A. 30.Kb1 Nxc3+ 31.Qxc3 Qxc3 with threat of Na3 mate 32.Nc2 Qb2# or 32.Ra2 Qxd4

B. 30.Kd1 Ne3+ 31.Ke1 Nxc2+ 32.Nxc2 (Rxc2 33.Qa1+) Qc1+

C. 30.Qb2 Nxb2 31.Rxb2 Qxc3+ 32.Nc2 Nb4

Jul-15-15
Premium Chessgames Member
  Penguincw: Hmm. Like others, I thought 28...Nxa3 29.bxa3 was the answer. However, my move of 29...Qxa3+ is probably not the greatest.
Jul-15-15
Premium Chessgames Member
  kevin86: White must lose the queen or allow the attack to come in.
Jul-15-15
Premium Chessgames Member
  Zhbugnoimt: Found this one in a few seconds. 28...Rxc3! 0-1
Jul-15-15
Premium Chessgames Member
  chrisowen: Ja c3 lerk d5 and c4 wait in the

shadows ave inter guild cub angel eve free cascadence for catch knight after wins queen i c2 up holy angel vet black first info ok focus right rook as wheel accolade i c2 have spark am good engine free cage as i i er captain ive at scream i said aids fickle suffice go flick i cuff angel eve go build eve free castle try first and wins am well join junior revoke liner cackle spark register am eg an estimate light has to give up queen at order to stay around to spur get ramble give go ok koinus an greed vet ok aka kind frame thod carry angel i vet black go add do wades mind awe free cascadence rove,

gadzooks it zip ave erm luck er best ive get able aimed dowry angle whet your appetite am hive spark quarry an a3 or c3 both bad bets am quandry angel as no nincompoop pick ave patch eg win spark snip snuff tile ground fab biff gave bap post mort reveals am bad d4 dive spark bone ive get able mission select over kin slid i b1 too i bank safe then for as whille go c3 cascadence build angel eve rook wreck lights position as hive mind rove free combine then match eg win choose free cover mash white up ride vet as lion uncorked irk diggle around cant escape then clutches of black at wins am dives law at ay were cradle cook on gas ave gave get able mission select over then erm kick erm card it ardent ave aim vet stub big gap fill his boots mind rove spark mice up vow slack maam bad d4 did co hood hob set vision peg lime black have free cub cc erm engine likes at c3 hello lovely finish am man off old at win as has to be careful again back f5 line murky oh to protocol erm in at our behest cage spark cog back bivowauc free shelter eg im entered ave clean again early am rate for won i be proof lare every am good chance lip dead try deed have to ebb cutoff point an ere flight as cad bold i do food for thought asker ala show an,

boat around go corroborates ive then angel have viva free rook edict earn as evermore am got each an a3 good infer tile ground i fatefuls again save at het up aid d4 dive spark bad good was at i h2 ave nt also f5 or b1 old gains am but have button up coat wrapped inter neat save under am tidal wave free cascadence vow gold i beat guild line beset i dare to do then math at have hand flurry it hind again maneovre abreast angels beneath hive spark i go at afraid for d4 did then i h2 or go f5 etch again dangle event slide as am b1 rack ave get away am rate free clause on the war path too can get away angels black faces more difficult task erm whisk away an give among an got dipoff aim fold i go to ground over decks i et tu brute as have uniform appraisal light fluffs his chance at infer cutoff points laid fetch eg win vet camp am c3 first evermore angel dipoff i duos aids i dangle again affable at mid inter guild over beset affix a cut i curry favour ave i be ear accolade koinus an greed ive spur angel at bad d4 dare free cascadence give at corridor 28...Rxc3 29.bxc3 or give-aways 29.Qxc3 an vilificate rook as wheel ave free choose at win either bind as have at a3 and queen back need inter guild again am a3 kind for knight wins queen am cascadence bod an ive at screamer debonair cobbled body boddice vined for catch eg win,

Jul-15-15  KingsGambiteer: I've asked before but I still don't understand. What's up with chrisowen's posts?
Jul-15-15  rainingpieces: 28..Rxc3 29.bxc3 Qxa3+

a) 30.Kb1 Nxc3+ wins the queen

b) 30.Kd1 Nxc3+

b1) 31.Qxc3 Qxc3

b2) 31.Ke1 Qa1+ mates

Jul-15-15  starry2013: I'd definitely want to keep my rook, I suppose I'm weak enough to need it in the ensuing play.
Jul-15-15  starry2013: Having said that I just delayed exchanging the rook anyway. You just have to move the queen around well to win.
Jul-15-15  Nick46: KingsGambiteer: I empazhise with you and don't doubt that others do too, but.... 1. Ours is not always to reason why.
2. Read the v. reasonable rules and regulations of this great website.
Jul-15-15  Nick46: empathize !!!
Jul-15-15  BOSTER: <MindCtrol9:I saw this one really quick>.

Once I saw the Hottest Women's Beach Volleyball.
Certainly most men pay more attention at Micro Bikini. And when I asked my neighbor, what is the score, he looked at me like my question is coming out of the blue. The less we know, the more we feel.

How all this is related to the puzzle?
I always try to get more information, more details about the pos.

What I saw that white queen and king
are on the same line: it means that queen can be pinned. Then I saw black knights <hit> the same square e3. I like such knight structure when they <hit> the same square. For ex. Nb5 and Ne5 looking at f7, and pawn a3 is a weakness.

Jul-15-15  BOSTER: < CHESSTTCAMP : Not much play to review>.

Enough white to play 26.Rg3 or Rd1, you'd have even POTD.

Jul-15-15  Pedro Fernandez: <Sharky> 28...Rxc3 was obvious, but let me tell you something: in more trivial puzzles I have been blind! Greetings my dear friend. PS. Well, it also was obvious that my dear friend <chrisowen> was going to be not so trivial this time.
Jul-15-15  Pedro Fernandez: For instance, 28...Rxc3! 29.Nf5 (29.bxc3?? is bad idea} Rxc2+ 30.Rxc2 Qxf4+ 31.Kb1 (31.Kd1?? is not a good idea) Nd2+ 32.Ka1 (32.Ka2?? is bad idea) and now 32...Qe4 is too much strong, 0-1. PS. No machines were used in this analysis, so any criticism is welcome.
Jul-16-15  Pedro Fernandez: And BTW, this analysis was made in a couple minutes, though I could be mistaken.
Jul-16-15
Premium Chessgames Member
  CHESSTTCAMPS: <<agb2002: >I can't remember where I put my Chrisowenish-Spanish dictionary).> Ah, that is secret, so it is probably designed to self-destruct.
search thread:   
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
NOTE: You need to pick a username and password to post a reply. Getting your account takes less than a minute, is totally anonymous, and 100% free—plus, it entitles you to features otherwise unavailable. Pick your username now and join the chessgames community!
If you already have an account, you should login now.
Please observe our posting guidelines:
  1. No obscene, racist, sexist, profane, raunchy, or disgusting language.
  2. No spamming, advertising, duplicate or nonsense posts.
  3. No malicious personal attacks, including cyber stalking, systematic antagonism, or gratuitous name-calling of any member Iincludinfgall Admin and Owners or any of their family, friends, associates, or business interests. If you think someone is an idiot, then provide evidence that their reasoning is invalid and/or idiotic, instead of just calling them an idiot. It's a subtle but important distinction, even in political discussions.
  4. Nothing in violation of United States law.
  5. No malicious posting of or linking to personal, private, and/or negative information (aka "doxing" or "doxxing") about any member, (including all Admin and Owners) or any of their family, friends, associates, or business interests. This includes all media: text, images, video, audio, or otherwise. Such actions will result in severe sanctions for any violators.
  6. NO TROLLING. Admin and Owners know it when they see it, and sanctions for any trolls will be significant.
  7. Any off-topic posts which distract from the primary topic of discussion are subject to removal.
  8. The use of "sock puppet" accounts to circumvent disciplinary action taken by Moderators is expressly prohibited.
  9. The use of "sock puppet" accounts in an attempt to undermine any side of a debate—or to create a false impression of consensus or support—is prohibited.
  10. All decisions with respect to deleting posts, and any subsequent discipline, are final, and occur at the sole discretion of the Moderators, Admin, and Owners.
  11. Please try to maintain a semblance of civility at all times.
Blow the Whistle See something that violates our rules? Blow the whistle and inform a Moderator.

NOTE: Keep all discussion on the topic of this page. This forum is for this specific game and nothing else. If you want to discuss chess in general, or this site, visit the Kibitzer's Café.

Messages posted by Chessgames members do not necessarily represent the views of Chessgames.com, its employees, or sponsors. All Moderator actions taken are at the sole discretion of the Admin and Owners—who will strive to act fairly and consistently at all times.
Spot an error? Please submit a correction slip and help us eliminate database mistakes!
<This page contains Editor Notes. Click here to read them.>
This game is type: CLASSICAL (Disagree? Please submit a correction slip.)

Featured in the Following Game Collections[what is this?]
Eduardo Bermudez's favorite colombian players
by Eduardo Bermudez
ISeth's favorite games
by ISeth
Sudamerica Escondida
by Gottschalk
28....? (July 15, 2015)
from Wednesday Puzzles, 2011-2017 by Phony Benoni
A A0 C22 Center Game: Berger [Black]
by chess.master
28....? (Wednesday, July 15)
from Puzzle of the Day 2015 by Phony Benoni


home | about | login | logout | F.A.Q. | your profile | preferences | Premium Membership | Kibitzer's Café | Biographer's Bistro | new kibitzing | chessforums | Tournament Index | Player Directory | Notable Games | World Chess Championships | Opening Explorer | Guess the Move | Game Collections | ChessBookie Game | Chessgames Challenge | Store | privacy notice | contact us
Copyright 2001-2019, Chessgames Services LLC