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| May-28-20 | | mike1: yes, all very well indeed . But I already know that I would not necessarily wine that endgame after
1) -0.75 (28 ply) 24.h4 ♕f3 25.♖e1+ ♘xe1 26.♕xf3 ♘h3+ 27.♖xh3 ♘xf3+ 28.♔f2 ♘d2 29.g4 ♔f7 30.♗c3 ♘e4+ 31.♔e2 ♖e8 32.♖f3+ ♔g8 33.♔d3 ♘xc3 34.bxc3 ♖e1 35.g5 ♖h1 36.♖f4 b5 37.♖f6 ♖h3+ 38.♔c2 ♖xh4 39.♖xc6 ♖h2+ 40.♔b3 a5 41.♖a6
according to SF |
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| May-28-20 | | Predrag3141: After 23 … Qf5, the best defense is 24 h4. The evaluation then is -0.75. So this is not Black to move and win.
I was worried about 23 … Qf5 24 h3 (similar to the best defense but drops the h-pawn). So I chose 23 … Qg4, keeping the h-pawn at home. The evaluation of that move is +0.00, only slightly weaker than the move played. |
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May-28-20
 | | chrisowen: Quick flash no? |
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| May-28-20 | | Brenin: <mike1>, <Predrag3141>: I agree, these puzzles are not always find the win, but sometimes simply find the best move. Certainly 23 ... Qf5 satisfies that criterion, especially as SF's favoured response 24 h4, weakening g3 and allowing the alarming-looking 24 ... Qf3, is far from obvious (a former World Champion failed to find it). |
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May-28-20
 | | scormus: <Brenin. these puzzles are not always find the win, but sometimes simply find the best move> Yes, I looked hard but couldn't see any move that looked like it could be a killer. After a whiole I decided there wasn't one, and settled on 23 ... Qf5, eyeing f3. Happy and slightly relieved to see it was that. Couldn't work out the whole sequence in advance, as I didn't know the W moves. Expecting an defensive try, certainly not 24 Qxb7? Didn't pick h4. I'll settle for getting the B moves one at a time |
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| May-28-20 | | agb2002: Black has both knights and a pawn for a rook and a bishop. White threatens Qxb7+.
The black queen doesn't seem to be well placed and the knights need some protection. This suggests 23... Qf5: A) 24.Qxb7+ Kd6
A.1) 25.Qxa8 Nh3+ 26.Kg2 Qe4+ 27.Kxh3 (27.Kf1 Qf3#) 27... Nf2#. A.2) 25.Kf1 Qf3 wins.
A.3) 25.Kg2 Qe4+ 26.Kf1 Qf3 wins.
A.4) 25.h3(4) Qf3 26.Rh2 Qxg3+
A.4.a) 27.Rg2 Nh3+ 28.Kh1 (28.Kf1 Qf3+ 29.Rf2 Qxf2#) 28... Ndf2+ 29.Rxf2 Nxf2#. A.4.b) 27.Kf1 Qf3 (27... Qxh2 28.Qxa8 Qh1+ wins a piece but White gets some counterplay) 28.Kg1 Re8, unclear. B) 24.Re1+ Nxe1
B.1) 25.Qxb7+ Kd6 26.Qb4+ (26.Qxa8 Nh3#) 26... Kc7 looks very good for Black (27.Qxe1 Nxh1). B.2) 25.Qe3+ Kd6 26.Qxf2 Qxf2+ 27.Kxf2 Nd3+ ends up a pawn ahead. |
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May-28-20
| | chrisowen: Mark 1:14 ratify no? |
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May-28-20
| | chrisowen: Barrel out think yes no? |
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| May-28-20 | | Cheapo by the Dozen: Great game. Not so great puzzle, because the best move isn't all that much better than a careful equalizing/drawing defense via, for example, 23 ... Rd8. |
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| May-28-20 | | RandomVisitor: After 23.Kg1
click for larger viewStockfish_20052607_x64_modern:
<56/89 34:18 -1.05 23...Qf5 24.h4 Qf3 25.Re1+ Nxe1 26.Qxf3 Nh3+> 27.Kh2 Nxf3+ 28.Kxh3 Rd8 29.Kg4 Nd4 30.h5 Kf7 31.Be5 Nf5 32.Bf4 Rd5 33.hxg6+ Kxg6 34.Re1 h5+ 35.Kh3 Kf7 36.Re4 Rd1 37.Re5 Ng7 38.Bh6 Ne8 39.Bf4 Nf6 40.Kh4 Rb1 41.Re2 Kg6 42.Kh3 Rh1+ |
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| May-28-20 | | TheaN: <23....Qf5> is obvious as it's the best square for the queen and the knights are relatively weak. It's also somewhat obvious White can't play 24.Qxb7+? Kd6, mainly because of 25.Qxa8 Nh3+ 26.Kg2 Qe4+ 27.Kxh3 (Kf1 Qf3#) Nf2#. I have to admit I didn't even completely calculate it outright: Black doesn't exactly have better otherwise and playing Qxb7+ with Qxa8 seems suicide, regardless of a direct line. 24.Re1+ Nxe1 25.Qxb7+ ∓ is the better version of this idea for White, but best is 24.h4! ⩱: this defense is even tough to spot, let alone calculate completely and I can understand Ivanchuk didn't want to go into this. But after 24.Qxb7+ he sealed his fate, as after Kd6 -+ there's no saving grace. |
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| May-28-20 | | RandomVisitor: A final look, after 23.Kg1
click for larger viewStockfish_20052607_x64_modern:
<65/84 1:12:17 -1.10 23...Qf5 24.h4 Qf3 25.Re1+ Nxe1 26.Qxf3 Nh3+> 27.Kh2 Nxf3+ 28.Kxh3 Rd8 29.Kg4 Nd4 30.h5 Kf7 31.Be5 Rd5 32.Bf4 Nf5 33.b3 Rc5 34.Rh2 h6 35.hxg6+ Kxg6 36.Re2 h5+ 37.Kh3 Kf7 38.Rd2 Rd5 39.g4 hxg4+ 40.Kxg4 Rxd2 41.Bxd2 Ke6 42.Kf4 Nd6 |
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| May-28-20 | | DieHard: Nice game! Seemed pretty clear if a knight lands on h3 the white king suffocates |
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| May-28-20 | | saturn2: None of the knights can move. For example if Nxh1 then Qxd3 and the knight in the corner is trapped.
So I looked at queen moves. Qf5 Qe6 Qd7 clearing h3 for a knight check and bringing the queen to the long diagonal.
Qe6 and Qd7 lead to an exchange of queens which favor white. But Qf5 threatens Qf3.
However I dont have the feeling to have solved a puzzle. |
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| May-29-20 | | sophiephilo: Kept trying to work out the knights like Saturn2. Didnt get this at all. But what a game. I liked the bravado of black's unprotected king wandering around. |
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May-29-20
 | | al wazir: <Jonathan Lau: After 24.Qc3, Black simply wins by 24...Nh3+ 25.Kg2 Qe4+ 25.Kh3 Nf2#>, Yes, that's far better than my line. Thanks. |
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Jan-04-24
 | | OhioChessFan: Had the idea for the pun long ago, didn't want to settle for a random Chameleon, hoped for a tournament or player name close to Karma. |
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Jan-04-24
 | | Honza Cervenka: Chucky went va banque and got spanked. |
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| Jan-04-24 | | thegoodanarchist: Winning is easy for a karma chameleon.
Qh4 protects against the threat of ...Nh3 checkmate. Sadly for white, ...Qxh1 is also a checkmate threat. What's a Boy George to do? Resign! |
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| Jan-04-24 | | SeanAzarin: One Bacrot mate coming up! (If Ivanchuk plays on.) |
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Jan-04-24
 | | Teyss: It's Bacrot's immortal! Wait, some users hate this word. It's Bacrot's imperishable! Beautiful. 23...? was a Thursday puzzle in 2020 which seems a bit hard especially considering White missed the best defence. |
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Jan-04-24
 | | Check It Out: What a wild game. |
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Jan-04-24
 | | HeMateMe: Insane. Most players would prefer white after 12 moves. Of course most of us aren't GMs... |
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| Jan-04-24 | | Andrew Chapman: <Insane. Most players would prefer white after 12 moves. Of course most of us aren't GMs...>So does the engine, but for reasons that are not obvious. It gives the natural Bg2 which runs into Bf5, Qf1, d4, Nb1, at which point many of us might prefer black, optically speaking. |
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Jan-04-24
| | Check It Out: <Andrew Chapman: It gives the natural Bg2 which runs into Bf5, Qf1, d4, Nb1, at which point many of us might prefer black, optically speaking.> True, lots more space and development for black. But the engines place a high priority on king safety, and black is very weak in that department. 
click for larger view |
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sac: 15...dxe4