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Rafael Duailibe Leitao vs Felipe de Cresce El Debs
81st Brazilian Championship (2015), Joao Pessoa, rd 7, Jan-22
Slav Defense: Modern Line (D11)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Apr-03-16
Premium Chessgames Member
  Penguincw: Finally! Baseball is <back>!

---

The dreaded Sunday puzzle.

Uh, how close did I come today? Well, I had 2 lines in mind:

- 19.Nxb5+ cxb5 20.Bxb5, threatening trouble on d7.

- 19.Rxc6+ Kxc6 20.Bb5+ Kb7 21.Rd7+ Kc8.

Unfortunately, in the 2nd line, it won't accumulate to anything, so that's not good.

The first line, I got the sacrifice right, but I didn't get black's response right. But what if black played 19...cxb5 20.Bxb5?

Well, just looking at e8, position looks equal. White has a few pawns for a piece, and more active pieces. I don't think getting to d7 does anything.

Apr-03-16  suenteus po 147: This is one of those depressing puzzles where I correctly guessed the move to play, but could claim no victory as I couldn't follow up with the proper sequence, nor do I understand the follow-up once revealed.
Apr-03-16
Premium Chessgames Member
  An Englishman: Good Evening: As happens often on Sunday, I found the correct lines, but thought this was an intuitive (a.k.a. speculative) sacrifice and not a combination that in reality White probably calculated through the very end. Still, can't complain about having a 6/7 week including Sunday.
Apr-03-16
Premium Chessgames Member
  patzer2: Completely missed the impressive combination solving today's Sunday puzzle starting with 19. Nxb5+! However, I found it entertaining and instructive playing it out with the computer.

Here's my move-by-move look with Deep Fritz 15:

<19. Nxb5+! Kb7>

19... cxb5 20. Bxb5 Be7 (20... h6 21. Rc6+ Kb8 22. Rd8+ Kb7 23. Rd7+ Kb8 24. Ba6 ) 21. Bxf4+ Nxf4 22. Rd7+ Kb8 23. Rxe7 Rf8 24. Bc6 Ng6 25. Rb7+ Kc8 26. Bd5 Nf4 27. Raxa7 Nxd5 28. Rxa8+ Kxb7 29. Rxf8 (+9.22 @ 22 depth, Deep Fritz 15)

<20. Bc4 cxb5 21. Bxb5 Bb4 22. Bc6+ Kb8>

22... Kxa6 23. Ra1+ Ba5 24. b4 Ne2+ 25. Kh1 Ng3+ 26. hxg3 Ne5 27. Rxa5#

<23. Bxa8 Kxa8 24. Rxa7+ Kb8 25. Rdd7> 1-0

Black resigns in lieu of 25...Ne6 26. Rdb7+ Kc8 27. Rxb4 Rd8 28. Rc4+ Kb8 29. Rxf7 Nd4 30. Bxd4 Re8 31. Ba7+ Ka8 32. Bc5 (#8 @ 29 depth, Deep Fritz 15)

P.S.: For a Black improvement, instead of 11...e5? 12. dxe5 (+0.91 @ 18 depth, Deep Fritz 15), the computer suggestion 11...a6 = (0.10 @ 22 depth, Deep Fritz 15) appears to hold it level.

Apr-03-16  dfcx: I found this POTD not as difficult as yesterday's. As soon as I saw that black could defend the a4-e8 diagonal everything falls into place.

19.Nxb5+

A. 19...cxb5 20.Bxb5 Bb4(what else?) 21.Rc6+ Kb8 22.Ba6 and mates soon.

B. 19...Kb7 20.Bc4! (this is probably the hardest move to make) cxb5 21.Bxb5 and text moves follows.

B1. if black plays 20...Kxa6?? 21.Nd6+ Ka5 22.Nb7+ Kb4 23.Bd2#

C. 19...Kc8 20.Rxc6+ wins

D. 19...Kb8 20.Bxa7+ wins

Apr-03-16  patfoley: I got the main ideas, but did not foresee how lost and bereft that Black black bishop would be.
Apr-03-16  not not: i was thinking top sacrifice rook with rxc6 then bxb5 then rd7 and rxf7 - 3 pawns for rook? I dont know if it is good
Apr-03-16  goodevans: The key move here - the move that makes this a <Sunday puzzle> - is <22.Bc6+>. The R is immune to capture as otherwise the black K is trapped in the a-file corridor with mate soon to follow.

l wish I'd seen that prior to playing it through!

Apr-03-16
Premium Chessgames Member
  morfishine: I thought it was <19.Rxc6+> followed by 20.Bxb5+

Chess960 will do this to you

Apr-03-16  wooden nickel: 19.Nxb5+ is "guessable", the hard part is upon 19... Kb7 In order to play the fantastic follow-up 20.Bc4!
We need to spot at least 1 of 2 beautiful checkmates. Upon 20... KxRa6 21.Nd6+ Ka5
22.Ra1+ Kb4 23 Ra4#


click for larger view

21.Nd6+ Ka5
22.Nb7+ Kb4 23. Bd2#


click for larger view

Apr-03-16
Premium Chessgames Member
  RandomVisitor: After 18...Kc7


click for larger view

Komodo-9.42-64bit:

<+5.02/38 19.Nxb5+ Kb7 20.Bc4 cxb5 21.Bxb5 Bb4 22.Bc6+> Kc7 23.Rd7+ Kc8 24.Rxf7 Rb8 25.Raxa7 Bd6 26.Bd7+ Kd8 27.Ba4 Kc8 28.Bd2 Ne5 29.Rxf4 Rb7 30.Rxb7 Kxb7 31.Bc3 Rc8 32.Rf5 Ng6 33.Rb5+ Ka6 34.Rd5 Bf4 35.Bb5+ Kb7 36.e5 Bg5 37.e6 Bf6 38.Rd7+ Kb6 39.Ba4 Bxc3 40.bxc3 Rc7 41.Kf1 h6 42.Ke2 Rc5 43.Kd2 Re5 44.f4 Nxf4 45.e7 Nh3 46.Rd6+ Kc7 47.Rd3 Nxf2 48.e8Q Rxe8 49.Bxe8 Nxd3 50.Kxd3

+1.30/38 19.Kf1 Nxe2 20.Nxe2 Ne5 21.Rda1 Nxf3 22.Kg2 Ne5 23.Rxa7+ Rxa7 24.Rxa7+ Kb8 25.f4 c5 26.Ra5 Nd7 27.Rxb5+ Kc7 28.b4 cxb4 29.Ra5 Be7 30.Ra7+ Kc8 31.e5 Rd8 32.Nd4 Bc5 33.Ra8+ Kc7 34.Nb5+ Kc6 35.Rxd8 Bxe3 36.Nd6 Bxf4 37.Nxf7 Nxe5 38.Rd4 Bxh2 39.Nd8+ Kc7 40.Ne6+ Kc6 41.Nxg7 Bg1 42.Rxb4 Nd3 43.Rh4 Bf2 44.Rh6+ Kb5 45.Ne6 Bb6 46.b3 Nc1 47.Rh3 Kb4 48.Nf4 Bd4 49.Nd5+ Kc5

+1.22/38 19.Bf1 Be7 20.Nxb5+ cxb5 21.Bxb5 Rhd8 22.Rc6+ Kb8 23.Rdc1 Bd6 24.Ba6 Ne7 25.Rxd6 Nh3+ 26.Kg2 Rxd6 27.Bc4 Kb7 28.Kxh3 Rd7 29.Bb5 Rd6 30.Bf4 Rg6 31.Rd1 Rf6 32.Kg3 Rg6+ 33.Kh4 Re6 34.Be3 Ng6+ 35.Kg3 Rc8 36.Bd7 Rd8 37.Bc6+ Kc8 38.Bd5 Re7 39.b4 Rc7 40.b5 Rd6 41.Ra1 Ne7 42.Bb3 Rcd7 43.h4 Rg6+ 44.Kh2 Rf6 45.f4 Kb8 46.f5

Apr-03-16
Premium Chessgames Member
  agb2002: White has the bishop pair for a bishop and a knight.

Black threatens 19... b4.

White can expose the black king with 19.Nxb5+:

A) 19... cxb5 20.Bxb5

A.1) 20... Be7 21.Rd7+ Kb(c)8 22.Bxf4 Nxf4 23.Rxe7 + - [2P].

A.2) 20... Bb4 21.Rd4

A.2.a) 21... Bc5 22.Rd7+ and 23.Bxc5 + - [2B+2P vs 2N].

A.2.b) 21... Be1 22.Kf1 Rb8 (22... Ne6 23.Rd7+ and 23.Kxe1 + - [2B+2P vs 2N]) 23.Rxa7+ Rb7 (23... Kc8 24.Ba6+ wins) 24.Rxb7+ Kxb7 (24... Kb6 25.Rb4(d5)#) 25.Kxe1 + - [2B+3P vs 2N].

A.2.c) 21... Bf8 22.Rc6+ Kb7 (22... Kb8 23.Rd8+ Kb7 transposes to this line) 23.Rd7+ Kb8 24.Ba6 and mate in two.

A.3) 20... Ne6 21.Rc6+ Kb8 (21... Kb7 22.Rd7+ Kb8 23.Ba6 as in A.2.c) 22.Ba6

A.3.a) 22... Ne7 23.Bf4+ (or 23.Rd8+ Nxd8 24.Bf4#) 23... Nxf4 24.Rd8+ Nc8 25.Rxc8#.

A.3.b) 22... Be7 23.Rd7 Nc5 (23... Nd8 24.Rc8#) 24.Bxc5 Bxc5 25.Rb7#.

B) 19... Kb7 20.Bf1

B.1) 20... Kxa6 21.Nd6+ Ka5 22.Rd4 and mate in two.

B.2) 20... cxb5 21.Bxb5 looks similar to A.

C) 19... Kb(c)8 20.Bf1 cxb5 21.Bxb5 look similar to A.

-----

I have also considered 19.Rxc6+ Kxc6 20.Bxb5+ Kb(c)7 21.Rd7+ Kc8 but I think it's lost for White.

Apr-03-16  The Kings Domain: Nice to have gotten this. Good combo by white.
Apr-03-16
Premium Chessgames Member
  Jimfromprovidence: Yes, if you saw 20 Bc4 or 20 Bf1 you get the grand prize.

But there is also another beautiful mate to find if 20...Kc8 had occurred.


click for larger view

Apr-03-16  1.e4effort: pretty easy for a Sunday, eh?
Apr-03-16
Premium Chessgames Member
  chrisowen: Mash b5 foot besets ave monarch across b7 tower able amp c4 camps and b5 besets amps b5 banals and b4 blams am manange at h3 ash and as h1s have cream punt away am vet back e5 push ebbers am fleet off f4 lare bash e5 ebbers take e5 an e3 ave towers d7 and badder glean a6 as affable aves won two punts ahead go at 22.bc6+ Kb8 or cage vs bushwhacks an at angles clang as am 22Kc7 add checks d7 towers danglers castle add as lurch c8 channeler ave band an f1 fa da dees off lare bad b8 ladle at bushwhack off f4 flare and three punts ahead aves an ash 23.bxa8 Kxa8 24.rxa7+ offer bangleat arm an bash 24Kb8 25.rdd7 horse e6 backs efface b7s lane an banglers am vs as manage behemoth monarch c8 am lanes churches of reason ar pugs take arm b4 or able gave as an I f1 fa da dees and bosh am f7 fanfares trades e7 mort quarter a8 rack ash anglearms castles h8 harangues off and six men ahead ghost ave muff flush halts tell lovely am route won man yuck it kind overt be jove b5 besets eyeball etc able wore bus cus horse at have wushi cross blades am as have wag bug we views am bug change ie vet tack krypton factor fave wag bag age f4 frees hang hug feather boa boast am boon an boosh boar about take tale tame tab taste tall tank tag hoof b5 besets am flush oomph c6;
Apr-03-16
Premium Chessgames Member
  chrisowen: a6 babel affable every vet towers d7 dangles too as wons evermore am whelk man gew as helds wake I bug rad dark dock we bug I mad jangle by jove b5 padre besets bottle go bang as pop ez it zag ave any joy am bless am vs of flush ham foots mash b5 bush banals lovely cave bandshave wake I bug age I bus am voom b5 bash besets bottle go bang why rates whence alma ko fetch am fave b5 band banals an dark eg wushi cross blades eg I vet jap pop ez it zag ave band b5 bush besets and quad one I delve ash camp I cutoff lare at fad forges am path an bet camp ash cred it eddy am wave ash glad an cad I devious am ploy ash f4 arms flare bus band among ave glad an bet buffet around free gave act each as bye me bad at fad an fan bade e5 trade lane heads an e3 beck an call e5 cast every am glad route won band b5 besets I be at guffaw as heart of tao it coin bruvs affix a6 vests affable an towers d7 danglers am vest clads quobble go bush ash f4 arm flare bad rad done b5 lade banals am an I bangheads 19Nxb5+ buffet around an cap ave bad decks am dash an fog fang banals am gaff c7 clangers what elses won gave guft b5 flog bagful love cage flow an dang found change off lare gaffer fag hog flows a6 vet track vagabond towers affable loft an d7 danglers arm as have mend jog farm flack glad log flume game forth flung forge fag pen fog gaffball etc able wore bus am pang fence peg quag as back flow am gruff peg forget c7 vulcan cageoffs an depth frugal clangers am manage b7 banglers am manage vet fag van am an few glad men it ok ave ogle yes and u vs but foggy why rate b5 banals am vest better beater basher bets bagger babels d7 tower a6 affable vets bucket backer badder benter bevels watch case off vs buffet around lanes bagger busher bets band jove bullet bunter banter boggle barbeq creed it eddy am wave wheel barrow busses batter butter baller bounty bush bash b5 busher bets eve bandhave bosh hob he band elixir as habanero monarch b8 afters banghoves towers b7 banglers am as ave behemoth tasker as hobble hubba bubba gum baghead hovel bog bang bugs then it enough overt borough rough eaves am drop ok ave ogles a6 hangs affable towers d7 chugged it eddy am wave at hog hung back beat bean ghost an ghoul ebony beat ave blag het up h4 ash house home hovel at head bash free hone monarch chooses wons eves hove cream punt ahead ave arrears by am won back e5 push off f4 farms bosh e5 lanes take e5 an e3 ave towers d7 angles danglers am manage at an e3 ave won as 2 punts ahead ave monarch hone vent basher bet over I bangmends 19Kb7 20.bc4 cxb5 21.bxb5 bb4 an I 21Nh3+ Kh1 bad held ash am won as of be 22.bc6+ husher carafes ave team vests cutoff lares campers angle cuffers am be 22Kb8 exorbitant aves eve bushwhack dangles bullrushy am vote cream vet routes eves won as haves bashheads am clangers an cage at be an 22Kc7 cloggers am manage checks d7 castle add as lurch c8 channeler vet angle an f1 fa da dee off f4 lare bad b8s lane at bushwhacks off f4 lare and three punts ahead ave by aha 23.bxa8 Kxa8 24.rxa7+ I favour anglearm amomgs an gave ablehang as bash 24Kb8 25.rdd7 bad fad danglers am manage amongs an gave bade an danceoff lare at draghave at horse e6 backs efface b7s lade an behemoth monarch c8 channeler ave vests towers harangues take arm b4 or an bands am gave I f1 fa da dee an bash f7 fanfares trades e7 ment mitigated it ok ave ogle vim an I band dance an dence clanned it eddy am wave crowned it ok ave ogle band dancers am manages add an class cained it craned it eddy as have clean que beat buds am waves band devour etc able wore bus a8 rack and asherbets castles h8 harangues off and six punts am pave ahead aves bud dank it fired it eddy am waves bud decadent decode bad dealer off faced it ok ave ogle lore aced it ok ave ogle an vet as won as have whup etc able wore b5 bus ables eve won deadened it do rev keep decks on muddle an daddle ave mend freed it tried it ok have ogle am b5 batter;
Apr-03-16  alphee: Missed this one, definitely. ♘xb5 was an option (as well as ♖xa7 or ♗xa7) but I ddn't manage the next moves.
Apr-04-16  stst: Got to be NxP+ or Bb5+...
Opt for NxP+ to expose the K....
Jan-03-18
Premium Chessgames Member
  offramp: <chrisowen: ... hubba bubba..> It's a hubba bubba nightmare!
https://www.youtube.com/watch?v=XN5...
Jan-03-18
Premium Chessgames Member
  chrisowen: <offramp> Ah caddy codify blush vie beck n cull you know the capital?
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