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Le Quang Liem vs Murtas Muratovich Kazhgaleyev
Asian Continental Championship (2016), Tashkent UZB, rd 3, May-28
Queen's Gambit Accepted: Janowski-Larsen Variation (D25)  ·  1-0
ANALYSIS [x]

FEN COPIED

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sac: 21.Bxg7 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
May-29-16
Premium Chessgames Member
  wordfunph: nice shot 21.Bxg7!
May-31-16  paavoh: Would be a nice puzzle on Tue/Wed?!
Feb-09-18  stacase: 24.Ra3 Ouch!

Never crossed my mind to trap Black's Queen.

Feb-09-18  stst: K protected, then try harass the Q...
21.Ra3 Qb4 (only escape)
22.Rg3 (threaten Rxg+ supported by B) g6
23.Ba3 (forks Q, R) Q almost any, may be Qd4
24.Nf3 (more chase/pressure) Qg7 to guard Qh6
25.Choice of Nh4 or BxR, if BxR NxB
26.Nh4.... Black no good moves, White next Nf5

see how it actually played out by LQ...

Feb-09-18
Premium Chessgames Member
  wtpy: 21 Bg7 calls out to be played but a white attack solely on the king fizzles quickly.But the awkward placement of the black queen gets her trapped. I went straight for it foregoing the check on g3. I don't think that matters.
Feb-09-18
Premium Chessgames Member
  al wazir: I had the right idea and the right moves, but I made them in the wrong order: 21. Ra3 Qb4 (forced) 22. Rg3 f6 23. Ba3, winning the exchange. But after 23...d4 24. Bxf8 Nxf8 25. Nb3/Nf3 Qxe4 26. Qh6 Ng6, Black has two extra ♙s and a solid position.
Feb-09-18  mccarthpm: 34.Nf5 wins the quickest
Feb-09-18  NBZ: This puzzle has a nice twist. Bxg7 stood out, but I tried for very long to make the attack work. Obviously it doesn't, too few white attacking pieces. Finally it dawned on me that if the queen were on b2, Ra3 traps the black queen. Aha! Bxg7 must still be played, but only as a way to move the white queen to b2 with check, and then finish off the Black queen with Ra3.
Feb-09-18
Premium Chessgames Member
  agb2002: White is one pawn down.

The black queen lacks mobility (after 21.Ra3 the only move is 21... Qb4). This suggests 21.Bxg7:

A) 21... Kxg7 22.Qb2+

A.1) 22... f6 23.Ra3 wins decisive material.

A.2) 22... Nf6 23.Rg3+ (23.Ra3 Qd4) 23... Kh6 (23... Kh8 24.Qxf6#) 24.Qxf6+ Kh5 25.Qg5#.

A.3) 22... Ne5 23.Qxe5+ f6 (23... Kg8 24.Rg3#; 23... Kg6 24.Rg3+ Kh6 25.Qg5#; 23... Kh6 24.Qf6+ Kh5 25.g5#) 24.Qe7+

A.3.a) 24... Rf7 25.Rg3+ (or 25.Qxd8 + - [R+N vs b]) followed by 25.Qxf7 and mate soon.

A.3.b) 24... Kg6 25.Rg3+ and mate in two.

A.3.c) 24... Kh6 25.Rg3 Rg8 26.Qxf6+ Kh5 (26... Rg6 27.Rxg6+ hxg6 28.Qxd8 + - [R+N vs b]) 27.Qf7+ Kh6 (27... Kh4 28.Qxh7#; 27... Rg6 28.Qxh7+ Rh6 29.Qf5+ Kh4 30.Qg4(5)#) 28.Rxg8 Rxg8 (28... Rxd2 29.Qg7+ Kh5 30.Qg5#) 29.Qxg8 + - [R+N vs b].

A.3.d) 24... Kh8 25.Rg3 Rg8 26.Qxf6+ Rg7 27.Qxg7#.

A.4.e) 24... Kg8 25.Rg3+ Kh8 26.Qg7#.

A.5) 22... Kg8 23.Rg3#.

A.6) 22... Kg6 23.Rg3+ Kh5 (23... Kh6 24.Qg7+ Kh5 25.Qg5#) 24.Qg7 and mate soon.

A.7) 22... Kh6 23.Ra3 as in A.1.

B) 21... Rfe8 22.Rg3 wins decisive material (22... Rb8 23.Bf6#; 22... f6 23.Bxf6+ Kf7 24.Bxd8).

Feb-09-18
Premium Chessgames Member
  Dionysius1: I saw the probability of a Queen trap but couldn't find 21. ♗ x g7 and 22. ♕b2 as a way of protecting a3 and b4
Feb-09-18
Premium Chessgames Member
  lost in space: Luck for me this time.

I tried to checkmate with Bxg7, Rg3 and/or Qb2 and found - per coincidence - that I can trap the queen after the sequence Bxg7 Qb2+ Rg3 and Ra3 or directly Ra3.

Feb-09-18
Premium Chessgames Member
  cocker: Saw both themes (attack on g7 and Queen trap) but couldn't combine them.
Feb-09-18
Premium Chessgames Member
  malt: I had
21.Ra3 Qb4 22.Rg3 f6 23.Ba3 Qd4/Qa5 Did not see 21.B:g7 There's always tomorrow !
Feb-09-18
Premium Chessgames Member
  gofer: It looks like we can win an exchange with...

21 Ra3 Qb4
22 Rg3 g6/f6
23 Ba3

It also looks like we can win two pawns with

21 Ra3 Qb4
22 Rxa7 Rfe8 (to avoid the exchange)
23 Rxc7

There might even be a sequence where we manage to play Qc3 threatening Qxg7# and use that somehow, but it isn't completely obvious. I think I would probably go for the two pawns and then push Pa2.

~~~

Doh!

Feb-09-18
Premium Chessgames Member
  PhilFeeley: Was 23. Rg3+ actually necessary? The same result could have occurred with 23. Ra3.
Feb-09-18  mel gibson: Stockfish 8 says:

21. Bxg7 (21. Bxg7 (♗b2xg7 ♔g8xg7 ♕c1-b2+ f7-f6 ♖e3-a3 ♘d7-e5 ♖a3xa4 ♗b5xa4 ♕b2-b4 ♗a4-b5 ♘d2-b3 ♖f8-f7 a2-a4 ♘e5-d3 ♕b4-c3 ♗b5-a6 ♘b3-d4 ♔g7-h8 ♘d4-e6 ♖d8-g8 ♖a1-d1 ♗a6-c8 ♖d1xd3 ♗c8xe6 ♕c3xc6 ♗e6-c8 f2-f4 ♖g8-f8 ♔g1-f2 ♖f8-g8 ♔f2-f3 ♖g8-f8 ♔f3-e3 h7-h6 ♔e3-f2 ♔h8-g7 a4-a5 a7-a6 ♕c6-c5 ♔g7-h8) +4.34/31 74)

score for White +4.34 depth 31.

Feb-09-18  Monocle: <PhilFeeley: Was 23. Rg3+ actually necessary? The same result could have occurred with 23. Ra3.>

It wasn't necessary for the combination, but I guess he wanted to take the opportunity to force the black king to a slightly worse square? That's the only reason I can think of.

Feb-09-18
Premium Chessgames Member
  Carlos0012358: 23.Ra3 instead of 23.Rg3+ is a better move and wins the queen
Feb-09-18  ndg2: ^same. I only worked on Rg3 etc.
Feb-09-18  saturn2: In the variation 22..Nf6 the move 23 Rg3 is necessary.
Feb-09-18
Premium Chessgames Member
  chrisowen: Mucks o bg7us gunghost vints minds votes vimus o kg7us glockhug u qb2us bumus pf6us fluffus vowus vimus o rg3us gourd to it ave 23.Ra3 i v bongs actus vints 3 it ok hives ovars huntlong kh8us harangues to it fiv 23Kf7 becks codes u flungout vints 3 it ok hives ovars to it aves 24.Ra3 v iffyus uvsus actus vints 3 it ok hives ovars keyus actus vints hiveus mucks begin x i v kissy wonts q rails vowus vimus liars padus fadus puffs vueus hugus joyus z it's vasts heyus cuffs hives pained it's vasts pines dayus chews howdy vivas flavs chaff decaf whyus nipus chads fewus pinys candy fewus phius paces finds whyus fancy dewus hipus chaps defus winys vints u bg7us gunghots vimus hiveus mucks begin x i v eggus kissy wonts tonto notus vints norus ronus quorn query rails vowus vimus liars laids padus puffs flavs huvus joyus z it's vasts heyus cuffs hives pained it's vasts pines dayus chews howdy vivas flavs chaff to it a 21.Bxg7 Kxg7 22.Qb2+ huhus keyas actus blubb vowus vimus hudus hound o bg7us gunghost glockhug gufflogs gumption guvus o bg7us gourdhug guppylog groundus vowus o bg7us ghostlug ghoulhug gongs glugs ghost ghoul hungs vowus vimus vints corus 20f6 couts fluffus vimus ousts conts vints corus 20Rad8 corridor donthungs vowus vimus vints 3 it ok hives ovars hoggy grogs vowus vimus huggy gongs gunghos mucks mocks to it 22f6 23.Rg3+ i v bungs glock to it ave 23.Ra3 i v bongs actus vints 3 it ok hives ovars to it hiv 23Kh8 becks o u harangues to it fiv 23Kf7 becks o codes u flungout vints 3 it ok hives ovars to it aves 24.Ra3 v iffyus uvsus actus vints 3 it ok hives ovars loquacious mulls monks lumps hives quick mellow vowus vimus o ganghave vints bongs dongs ruins cobble would nodus vides hodos cowsus bouts bunts vowus vimus bottom tubby trouble vowus vimus vints duffs doffs flush huffs hudus joust codus cloud djsus umsus q focus cinch v i bongs abcus claws keyus mucks o bg7us gunghost;
Feb-09-18  Cheapo by the Dozen: I saw lots of ideas around trapping Black's queen, but not the one that actually worked. :)

Best I found was

20 Ra3 Qb4 (force)
21 Rg3,

with the double threat of Rxg7+ and Ba3. That does also seem to win.

Feb-09-18  sp12: 22...Nf6 would have been fine

23. Rg3+ Kh8

23. Qxf6+ f6

Feb-09-18
Premium Chessgames Member
  patzer2: I missed the pretty Queen trap 21. Bxg7! Kxg7 22. Qb2+ f6 23. Ra3 +- (+4.03 @ 32 ply, Stockfish 8) which solves today's Friday (21. ?) puzzle. Instead, I joined those who went for the win of the exchange with 21. Ra3 Qb4 22. Rg3 g6 23. Ba3 +- (+2.37 @ 32 ply, Stockfish 8).

P.S.: Black's decisive mistake was 20...Rad8?, allowing 21. Bxg7! +-. Instead, 20...f6 21. Rb1 Qa6 22. Ra3 Qb6 = (+0.17 @ 32 ply, Stockfish 8) defuses White's threats and keeps the game level.

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