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Later Kibitzing> |
| May-15-15 | | paavoh: Collapse by Black in the opening? 10 a5 seems quite rare a continuation. Why not
11. exd4, although White seems to have the upper hand with fluid development? |
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| May-15-15 | | ninja warrior: nice tactical protection of the bishop... 35.Qe7 would have been brutal if black took it. |
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| May-15-15 | | PJs Studio: 23.Ng5 Qc1+ 24.Bf1 ... g6(?) 25.Nxe6
Is this idea bad for white? |
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| May-15-15 | | PJs Studio: Skip that. 23...Qc1+ and 24...Qxg5.
Whoopsie! |
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May-15-15
 | | Penguincw: Wow, a 2nd queen for black appears on the board.
Anyway, this game followed A Giri vs Ivanchuk, 2015 up to 12...Nc5. Here, Dominguez tried 13.Be3, whereas Giri played 13.Bg5, and the game was drawn on move 102. |
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| May-15-15 | | CountryGirl: Powerfully played by white. Bold exchange sac and accurate calculation to come out on top. Leinier is doing very well so far in this event. |
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| May-15-15 | | truefriends: < CountryGirl: Powerfully played by white. Bold exchange sac and accurate calculation to come out on top.> I guess it was all just prep |
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May-16-15
 | | offramp: After 18...Kt-Q5,
click for larger view
...white is definitely going to take the knight. Dominguez Perez chose to take with the bishop and we reached this position:
click for larger viewHad he decided to take with the knight we would have reached this position:
click for larger viewI think the main difference is that having a knight on the board gives a bit of flexibility. |
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| May-17-15 | | SirRuthless: This was a really nice tactical win that comes from a positional domination for Lenier. I always thought of him as a grinder. An older Caruana who strangled his opponents with thorough preparation and great technical play and this might be an example of this but the exchange sac seems intuitive like he found it over the board, not something he cooked up on the machine over a bag of trailmix on a tuesday afternoon. |
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May-13-16
| | Penguincw: It's Friday the 13th!
And I got a shocker here, as for a second, I almost though that <cg> <PREDICTED> my (and everyone else's) comments for this POTD, only to see this was 2015 (although I have no memory of seeing this game). Hard to tell whether or not I got this puzzle last time, but this puzzle, seems a bit easier than normal for a Friday (but in fairness, early this week was <hard>). I got 31.d7. I hoped black would play 31...Rd8, then 32.Qb4+ Kf8 33.Qe7, and white is winning, but I completely missed 31...Bxd7. But, if I saw 31...Bxd7, can I still solve the rest of the puzzle? Well, I see 32.Rxd7 b1=Q, but then I would slip with 33.Qb4+. After 33...Kg8, if 34.Bxb1, then 34...Qe3+, and notice how the white queen isn't on a3 to defend e3. After 33.Qa3+ Kg8 34.Bxb1, white is pretty much winning, piling up on f7, and avoiding the queen checks. If 34...Qxb1, 35.Qe7, back rank problems! |
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| May-13-16 | | alfiere nero: I only figured out 31. d7 as the best initial move. Do I get a point? I'm actually pretty proud of it! |
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| May-13-16 | | patzer2: Bombed on this Friday puzzle with the failed defensive effort 31. Rd2?? which loses big time to 31...c1=Q 32. Bxb1 Qxd2  (-15.37 @ 20 depth, Deep Fritz 15)Looked at the winning 31. d7! but stopped my calculations after 31...Bxd7 32. Rxd7 c1=Q 33. Qa3+ Kg8 34. Bxb1 Qxb1 (diagram below), 
click for larger viewfailing here (diagram above) to see 35. Qe7!  which forces mate-in-11 (Deep Fritz 15). For a Black improvement, the computer suggestion 23...Qc2 = to  (-0.39 @ 25 depth, Houdini 4 x 64) looks good. |
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May-13-16
 | | al wazir: Couldn't white have played 30. d7, one move earlier, and won the same way? If 30...Bxd7, then 31. Rxd7 d1=Q 32. Bxb1, and now if 32...Qxb1 then 33. Qe7! |
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| May-13-16 | | plumbst: Qa3+! is key. I got to the end, but played Qb4+? instead which in the gameline is foiled by 34. Bxb1 Qe3+!, resulting in a perpetual. |
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| May-13-16 | | Coriolis: How does uncle silicon rate <31. Qb4>? |
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| May-13-16 | | agb2002: White is one pawn up.
Black threatens 31... c1=Q.
The simplistic 31.Qxc2 (31.Bxc2 Rxe2#) leads to an unfavorable ending with one pawn down after 31... Qxc2 32.Bxc2 Rxe2+ 33.Kg1 Rxc2 34.d7 Bxd7 35.Rxd7 Rxb2. The advanced pawn suggests 31.d7:
A) 31... Bxd7
A.1) 32.Qb4+ Kg8 (32... Re7 33.Rxd7 and mate soon) 33.Rxd7 A.1.a) 33... c1=Q 34.Bxb1 Qxb1 35.Qe7 Rf8 (35... Rxe7 36.Rd8+ Re8 37.Rxe8#) 36.Rd8 wins (36... Rxd8 37.Qxd8#). A.1.b) 33... Qd1 34.Re7
A.1.b.i) 34... Rf8 35.Bxc2 Qxc2 36.Qxb7 Qc5+ 37.Kg2 Qxa5 and White is only a pawn ahead but has the better position. A.1.b.ii) 34... Rd8 35.Qc4, with the double threat 36.Qxf7+ Kh8 37.Qxg7# and 36.Qxc2, ends up a piece ahead. A.1.b.iii) 34... Rc8 35.Qc4, with the triple threat 36.Qxc8+, 36.Qxf7+ and 36.Qxc2 as in A.1.b.ii (35... Rxc4 36.Re8#). A.2) 32.Rxd7 looks similar to A.1 but it's perhaps simpler because 32... Qd1 is met with 33.Rxd1 cxd1=Q 34.Qxd1 winning. Now 32... c1=Q 33.Qb4+ Kg8 34.Bxb1 transposes to A.1.a. B) 31... Rd8 32.Qb4+ Kg8 33.Qe7 Rf8 34.Qxf8+ Kxf8 35.d8=Q#. |
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| May-13-16 | | agb2002: I thought that Qa3+ or Qb4+ were the same but the essential difference is that the former prevents ... Qe3+ after Bxb1. The devil is in the detail. |
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| May-13-16 | | gofer: Black has lots of threats, so white needs to make his own... <31 d7 ...>
Threatening dxe8=R#
31 ... Rd8
32 Qb4+ Kg8
33 Qe7!
31 ... Rb8
32 Qb4+ Kg8
33 d8=Q+ Rxd8
34 Rxd8#
31 ... Rxe4
32 d8=Q+ Re8
33 Qaxe8#/Qdxe8#
So the pawn has to be taken...
<31 ... Bxd7>
<32 Rxd7 ...>
White still has threats and it is difficult to see how black can avoid them, due to the following
combination exploiting black's weak back rank; 33 Qb4+/Qa3+ Kg8 34 Qe7! 32 ... Rxe4?
33 Qxe4 mating
<32 ... c1=Q>
Black is hoping for 33 Bxb1 Qe3+ looking for all sorts of issues for white. <33 Qa3+! Kg8>
<34 Bxb1 ...>
White has navigated the myre. The check on e3 is not available, but black has no time to re-capture the bishop
due to Qe7 mating! So white is a full bishop up... GAME OVER! ~~~
Yep... |
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| May-13-16 | | not not: black is to promote next move, so white only hope is violent king attack I would push pawn to d7 threatening mate to tempt his bishop back 31. d7 (and after bishop takes and goes back)
32. Rxd7! letting him to promote queen and then
33. Qb4 check, so when kings moves, you've got this wonderful idea I saw in Tal's games many times 34. Qe7! (bulling rook due to back rank weakness)
I dont know if this is correct, but I see nothing better, and white has to go for king or go down vs 2 black queens |
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| May-13-16 | | not not: I missed white needs take with bishop first to eliminate one of the queens and then only play Qe7 it would be my another glorious blitz lose, alas |
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| May-13-16 | | not not: and I missed Qa3 too, my Qb4 sucks too
damn tactics |
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May-13-16
 | | Jimfromprovidence: Black could try 34...Qh1, below.
click for larger view The threat is 35...Qxh2+ 36 Kf1 (other king moves lead to mate in 1) 36...Qh3+, winning the rook. White parries that threat with 35 Qe3!
click for larger view |
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| May-13-16 | | kevin86: Black can promote, but white CAN and does WIN. |
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| May-13-16 | | saturn2: My attempt was 31 Qb4. It does not give away the d pawn and black cannot play c1Q. So after 31...Rd8 or Kg8 the outcome is unclear (to me) |
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| May-13-16 | | Cheapo by the Dozen: In a silly error, I forgot that White can snap off one of the Black queens. |
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Kibitzing
sac: 16.Rxb4