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|Jul-13-17|| ||patzer2: Just got through going through an 11 move combination at move 35...? of F Vallejo Pons vs P Tregubov, 2016 with two of my Grandsons before tackling today's Thursday problem (20. ?) in this game.|
Don't know if it helped but I was able to find the game continuation 20. Bxg7! Qxd2 21. Bxf6 Qxd1 22. Rd1 .
It's difficult finding improvements for Black against White's solid opening play, which was duplicated for the first eight moves in the recent White win W So vs Z Javakhadze, 2017.
Perhaps 13...b5 14. Na4 a5 15. g4 Bb7 (+0.31 @ 27 depth, Stockfish 8) would have given Black better drawing chances.
|Jul-13-17|| ||agb2002: White has a bishop and a knight for the bishop pair and a pawn.|
Black threatens Qxd2.
White can weaken the dark squares around the black king with 20.Bxg7:
A) 20... Qxd2 21.Bxf6
A.1) 21... Qxe2 22.Rh8#.
A.2) 21... Qxd1+ 22.Rxd1 followed by 23.Rh1 and 24.Rh8# (22... Rfd8 23.Rh1 Rd6 24.Rh8#).
A.3) 21... Qd8 22.Rh8#.
B) 20... Kxg7 21.Qh6+ Kg8 22.Qh8#.
C) 20... Nh5 21.Qh6 (or 21.Bxf8) wins decisive material.
|Jul-13-17|| ||Once: Ah yes, it's my old friend the 150 attack/ h file hack against the fianchettoed black king on the kingside.|
You play Qd2, Be3 and then h4, h5. Open or half open the h file to reveal the rook sitting on h1. At some point you play Bh6. Sacrifices happen. Mate around move 30.
Crude, unsophisticated, predictable but sometimes surprisingly effective.
|Jul-13-17|| ||nasher: Can white win with Qe3 ? It attacks the black queen and threatens Bxg7.|
|Jul-13-17|| ||diagonalley: <phony benoni> ... totally agree with both your posts|
|Jul-13-17|| ||AlicesKnight: I saw the manoeuvre played in the game but was vaguely expecting that I had missed something. A winning advantage but not a won game.|
|Jul-13-17|| ||AlicesKnight: .......... except that the h8 mate is STILL inescapable (without giving up at least a R)!|
|Jul-13-17|| ||gofer: A nice easy one today. Take black's DSB with our DSB, if black takes back with the king its mate in two. So black cannot take back, now we have the chance to end up with our DSB on f6 and open h file and with one rook spare to give mate on h8. If black plays Nh5 we simply take Rf8 gaining
a whole rook!
|Jul-13-17|| ||Sastre: <nasher: Can white win with Qe3 ? It attacks the black queen and threatens Bxg7.>|
20.Qe3 runs into 20...Nd5.
|Jul-13-17|| ||saturn2: 20 BxB and the mate threat Rh8 prevails blacks QxQd2 followed by QxRd1+|
If 20..KxBg7 the queen will mate on h8
|Jul-13-17|| ||Walter Glattke: They play a special constellation with
0-0-0-Be3-Qd2 and f3-g4-h4-Bh6 and after 12.-b5 black can give up, this is very stupid, the EZ win is descrived in
my book of chess w-glattke.de, or look at Tal-Bolbochan or anything, this is
often played, but countered with no silly black queen's wing play.
|Jul-13-17|| ||morfishine: <20.Bxg7> does the trick because Black's reply <20...Qxd2> is not with check, so White can ignore this and play <21.Bxf6> threatening mate at <h8>|
|Jul-13-17|| ||clement41: Although once you know the pattern it is rather easy to find, I simply love the 21 Bxf6!! idea: a quiet and seemingly innocuous move that turns out to be a killer, gently ignoring black's powerless queen.
I'll engine-check but it looks like after 21...Qxd1+ 22 Rxd1 black cannot even prevent 23 Rh1/24 Rh8# !|
|Jul-13-17|| ||schachfuchs: Is it worth noting that the Ne2 is essential for this combination?!|
|Jul-13-17|| ||malt: Looking first at 20.Qg5, then I spied 20.B:g7 Q:d2 21.B:f6! .|
|Jul-13-17|| ||TransfiniteCardinal: Got it quickly ye ha.|
|Jul-13-17|| ||JTV: In the following Position:
click for larger view
18...fxg6 would have been the move for maintaining equality. 18... hxg6 opened a back door for white to pressure black with a mating pattern. 19.Bh6 is the best way to start the onslaught. Blacks best defense would have been either Bh8 or Nh5 for a semi fighting chance. 19...dxe4, is a weak response in thwarting whites attack and after 20...Qxd2 21. Bxf6 Qxd1+ 22. Rxd1, white can mate in 5...
|Jul-13-17|| ||kevin86: Black's king is so wedged in that he cannot escape mate on h8!|
|Jul-13-17|| ||Walter Glattke: To schachfuchs: f3 is the key, Qd2-Be3 to Bh6 and g4-h4-g5 to drive Nf6 away,
without Ne2 the attack is not possible.
Ne2 threatens later g4!
|Jul-13-17|| ||chrisowen: Face ja g7s gonghung u d2s dub bot 20...Nh5 corn hoglug 5 6 oust conts vents won by vis f6s fountus u d1s do by ho 22.Rxd1 huh ho da bud male 5 ave face ja jaffa caspar pins barbeque would ow trow von guv rev i gaz meld hey its hi dent pb raw its hint dip brawn vam its death vint pin ball rave i wrapt behind flav dab hewn trip ok vow bad threw nip braid
vis ave pew nth degree g7s gangways von guv bond face ja g7s goblungs vis jaffa caspar just pins barbeque pin nub q i ow trow von guv rottweiler vim trouble von guv vow rave ugly geez lid dem hem meld hey its hi dent mirth vow vis vint bot 20.Bxg7 Qxd2 co dub hob hock hod hog honour von guv hop ok vow horn host hot how g7s goblungs governus hog hung hug gog glug grog vow enough ghost ghoul huggy hoggy glugs mock muck mugs moggies vim come muggies vide u ebberhump 19...dxe4 hobs egger 4 5 oust conts vents won u harangues 19...Bh8 blusher harangues cram flav 2 3 oust conts
vents vow bot 20...Nh5 corn hoglug 5 6 ousts conts vents won vis by u 21.Bxf6 Qxd1+ cover da by da 22.Rxd1 huh ho da bud male 5 ave pock puck job lubbly jubbly muck mock mob bum buck block burp von guv pub cob cub fanfare nod dink clod evesdrop ok von guv hot won bung up hung vint da q rosti vim bot vow but tubby bunt trouble von guv hoax vam viva exhonour
cinch cob cub buck block corroborate brouck vo guv out ok vows um jet ja key c feel feel quip vint again huffle ebbers ave face ja g7s gonghung;|
|Jul-13-17|| ||drollere: 20. Bxg7 was straightforward (clearing the h file); black can't capture the B as the threat is 21. Qh6+ and 22. Qh8#.|
it was necessary to work out that black's reply 20. .. Qxd2 would be met by 21. Bxf6, forcing the black Q to 21. .. Qxd1 (any retreat, or capturing the N, would give white 22. Rh8#).
then, after Qxd1 22. Rxd1, black needs three moves to save the K, and white needs only two moves to mate.
|Jul-13-17|| ||Raffagreat: 16. e5 fatal error!!!!|
|Jul-13-17|| ||RandomVisitor: I went for 20.Qc1 but I did not see all of the complications. I planned to deflect the black Queen, then Bxg7 followed by Qh6.|
click for larger view
Stockfish_17061704_x64_modern: <12 minutes computer time>
<+3.31/42 20...Rc8 21.Nc5 Rxc5> 22.Qxc5 Qc8 23.Bxg7 Kxg7 24.Qe3 Rh8 25.Ng3 exf3 26.Rxh8 Qxh8 27.gxf3 Qc8 28.Rd6 Ne8 29.Qxe5+ Kg8 30.Rd4 Bxf3 31.Rxb4 Qd7 32.Rd4 Qe6 33.Qxe6 fxe6 34.Kc2 Bd5 35.Ra4 Nc7 36.Kd3 Kf7 37.Ne4 e5 38.Nc5 g5 39.Ke3 Bc6 40.Ra5 g4 41.Nd3 Kf6 42.Nxe5 Nd5+ 43.Ke4 g3 44.Ng4+ Kg5 45.Ne3 Kh4 46.Rxd5 Kh3 47.Kd4 Bxd5 48.Kxd5 Kh2
|Jul-13-17|| ||Pedro Fernandez: LOL! 20. is obvious, but I didn't see the simple 20...Qxd2; okay just in seconds. After the latter one everything is obvious too.|
PS. Hey <Chris>, just thinking in puzzles? Why?
|Jul-14-17|| ||patzer2: <JTV> Thanks for the recommendation 18...fxg6! Although I'm not sure if it gives Black an even position, it does avoid losing with 18...hxg6?? 19. Bh6 (+2.93 @ 26 depth, Stockfish 8) and gives the second player fighting chances for a draw.|
Playing it out move-by-move with Stockfish 8 yields 18...fxg6 19.Ba7 Rc8 20.Qxb4 Rf7 21.Ng3 d4 22.Bb6 Qe8 23.Ba5 Bf8 24.Qd2 Nd7 25.Rc1 Bc6 26.Rc2 Bb5 27.Rxc8 Qxc8 28.Rc1 Qa8 29.Nh1 Rf6 30.Nf2 h5 31.Nd3 Rc6 32.Rxc6 Qxc6 33.Qc2 Qf6 34.Nac5 Nxc5 35.Nxc5 Bxc5 36.Qxc5 Bd3+ 37.Ka1 Qg5 38.Qc8+ Kh7 39.a4 Qxg2 40.Qc7+ Kh6 41.Ka2 Qc2 42.Qd8 Qb1+ 43.Ka3 Qa1+ 44.Kb4 Qxb2 45.Kc5 Bb1 46.Qh8+ Kg5 47.Qxe5+ Kh6 48.f4 Qc2+ 49.Kxd4 Qd3+ 50.Kc5 Qe3+ 51.Kd6 Kh7 52.Bc3 Qb6+ 53.Kd5 Qxb3+ 54.Kc5 Qa3+ 55.Kd4 Qxa4+ 56.Ke3 Qxe4+ 57.Qxe4 Bxe4 58.Kxe4 Kg8 = (0.08 @ 54 depth, Stockfish 8) (diagram below)
click for larger view
With a position that is a 7-piece table base draw.
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