Jun-16-15
 | | Penguincw: Woah there! An underpromotion to a rook (unnecessary, but still cool), and then checkmate (black should've resigned after 51.e7 at the latest). In the blitz games, Hammer also conceded a rook promotion (J L Hammer vs Aronian, 2015) and got checkmated (Carlsen vs J L Hammer, 2015). Hammer is getting a lot of attention for his games. |
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| Jun-16-15 | | john barleycorn: Yes, Carlsen should be warned. The threats are thickening in. |
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| Jun-16-15 | | Conrad93: how does Nakamura get away with playing this crap? |
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| Jun-16-15 | | SirRuthless: I guess when your opponents are this Kvappy, anything goes! |
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| Jun-17-15 | | ToTheDeath: I enjoyed this game. 41...Rd5 was a better try but I suspect the position is already beyond good and evil at that point. Very sporting to allow the mate, quite a likeable fellow, this Hammer. |
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| Jun-17-15 | | ex0duz: Can someone explain to me why 45. e3 was played, giving up his bishop? It just leads to a completely lost position right? Was that the move that basically threw away the game? I'm sure he was already had an inferior position, but getting mated in another 10 moves or so must be the result of ludicrously bad play(or an outright blunder in this case? did he just blunder his bishop or something since he thought he could promote his B pawn somehow?) |
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| Jun-17-15 | | Calar: <exoduz> I assume you meant 45...b3. Black's position is hopeless at this point. All the attaempts to save the Bishop fail: 45...Bd3+ or Bg6 46.Kxg2
45...Bd5 46.Rxd5
45...Bf3 46.e7
I guess Black at least tried to create some counterplay based on passed b-pawn instead of passively going down. |
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Jun-18-16
| | Penguincw: Hmm, did not guess this puzzle correctly, even though I made a comment on it a mere 368 days ago. Nothing to add to my above comment. |
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| Jun-18-16 | | dfcx: Got the first couple of moves.
43.Re1 Bxc5+ 44.Rxc5 Bd5
click for larger viewThen I went wrong with 45.d7?? Rg2+ black wins. |
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| Jun-18-16 | | YouRang: Very difficult (gulp...)
click for larger view
Well, black is threatening mate (...Rg2+ Kh1 ...Rxg3#), and so it behooves white to attack black's LSB on e4 that's hitting g2 & h1. The only piece we can really attack the LSB with is Rf1 (the Rc1 is busy guarding Bc5 and the Bf7 has no safe squares). So, I tried <43.Rfe1>, attacking the LSB and giving our K some extra room. Now it looks like black needs to make a bishop swap: <43...Bxc5+ 44.Rxc5>
click for larger view
Here, black needs to get his Be4 out of take, and <44...Bd5> looks best (protected by a pawn there and it hinders our Rc5).
click for larger view
So far so good, except that that's only as far as I got. Checking with the engine, this line is fine as it, but it needs to capped with <45.Rxd5! Rxd5 46.e7 Rdd8>, and black has to give up a rook to stop the pawn  . ~~~~
In the game, black opted on his 445th move (see 2nd diagram above) to play <44...Rg2+> and then tried to push the b-pawn, but that all went rather badly as white's e-pawn wins. |
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| Jun-18-16 | | AlicesKnight: Saw the need to move the Rf1 but did not get much of the consequence. Interesting that Black can establish three united passed Q-side pawns and be hopelessly lost; for arguably the best example of this, see Stahlberg-Tartakower, 1934, casual game after Ujpest tournament; 
click for larger view After 1.c4, dxc?? (....Kf6  ) lost to a charge by the White KRP. |
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| Jun-18-16 | | gofer: All white has to do it attack Be4 with Rf1, the reason that this is necessary is that black threatens
mate in two and so the best way to avoid the mate is attack the bishop that will be used to support
the rook in its mating attempt. By doing this, black has TWO bishops en-prise and this forces black
to play Bxc5. Be7 moving anywhere is great for white, getting it off the board completely is ideal! <43 Rf4 Bxc5+>
<44 Rxc5 ...>
At this point black has a few choices; b3, Bd5, Rd1+, etc 
click for larger viewBut the reason I prefer Rf4 over Re1 is that it allows the immediate pawn push of e7 in some scenarios! 44 ... Rd1+
45 Kf2 b3
46 e7!
~~~
Yes. I suppose... |
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Jun-18-16
 | | HeMateMe: got it in 30 sec. not difficult, just find room to escape the perpetual check from the Bishop + rook battery. |
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| Jun-18-16 | | patzer2: For today's Saturday puzzle position (43. ?), diagram below,
click for larger viewBlack threatens mate-in-three with the windmill attack 43...Rg2+ 44. Kh1 Rxg3+ 45. Rf3 Bxf3#. The only way to parry the threat and win the game is to threaten the Bishop at the top of the windmill. White has three ways to threaten the Bishop, with one of them losing and two of them winning: (1) The wrong way to attack the Bishop is 43. Bg6 ??, as it allows Black to turn the tables and snare the White King with mate-in-four after Bxc5+ 44. Rf2 Rfxf2 45. Bxe4 Rg2+ 46. Kh1 Rxh2#. (2) The game continuation 43. Rf1! (+ 3.67 @ 33 depth, Stockfish 7), as demonstrated by Nakamura's strong play, clearly works. (3) Another winning method to threaten the Bishop and kill the windmill is 43. Rf4+! Rd1+ (43...b3 44. Bxe7 b2 45. Re1 ) 44. Kf2! b3 45. Bxe7 (+4.03 @ 23 depth, Deep Fritz 15). So where did Black go wrong? According to the computer, the losing move was 38...Ne4? allowing 39. Nxe4 (+1.76 @ 29 depth, Komodo 9.42). Instead 38...Bd3 = to  (+0.27 @ 40 depth, Stockfish 6) holds for Black, as play might go 38...Bd3 39. Bd6 Qxg5 40. Bxe7 Rd2 41. Rf5 Rxe2 42. Rxg5 Ra8 = (or 42...Rb8 =). |
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| Jun-18-16 | | JohnBoy: <Jun-16-15, Conrad93: how does Nakamura get away with playing this crap?> I like it. He presses throughout, creating tons of problems for black to solve. |
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| Jun-18-16 | | Carlos0012358: Many options, many possible errors. In the end, the two possible promos on e6 and b4 are key, and white's advantage lies in the mobile K as compared to the trapped black K. That trapped K wil eventually be black's demise. |
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| Jun-18-16 | | YouRang: <Conrad93: how does Nakamura get away with playing this crap?> As usual, it's the corrupt system that favors the elite! The double-standard allows the top 10 players to enjoy getting away with a lot of things while the poor below-10 players suffer! |
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| Jun-18-16 | | WorstPlayerEver: Not so difficult. |
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| Jun-18-16 | | agb2002: White is one pawn down.
Black threatens mate in three (43... Rg2+ 44.Kh1 Rxg3+ 45.Rf3 Bxf3#). This threat, the defenseless black bishops, the possibility of a back rank mate and the advanced pawn suggest 43.Bg6 but this seems to lose to 43... Rg2+ 44.Kh1 Rgf2+ 44.Bxe4 (44.Kg1 Rxf1+ 45.Rxf1 Bxc5+ wins) 44... Rxf1+ 45.Rxf1 Rxf1+ 46.Kg2 Re1 47.Bxe7 Rxe4 48.Bxb4 Rxe6 - + [R+P vs B]. I haven't found the time for this puzzle today. I don't know, I'd probably try 43.Re1. For example, 43... Bxc5+ (43... Rg2+ 44.Kf1 Rxh2 45.Bxe7) 44.Rxc5 bxa3 (44... Bd5 45.Rxd5 -45.e7 Rg2+ 46.Kf1 Rxf7#- 45... cxd5 46.e7 + -) 45.Rxe4 Ra8 46.e7 wins. |
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| Jun-18-16 | | stst: White is threatened for a semi-smother via .... Rg2+ Kh1, Rxg3 dis+ and mate.
But it's White's move, the front line does not have any check soon, while the P-B is a strong couple not easy to break, so goes back for the defensive first, and note that once the block by its own R@f1 is released, the Black has no mate. Hence
43.Rfe1, then its turn for Black's choice to give up which B, since Bxc5 gives a check, then at least an exchange, so Bxc5+
44.Rxc5.... now two choices for the B@e4:
(A)
44.........Bd5 to maintain the pressure on the lower right corner
45.Rxc5! seeing that RxR fails to BxR cxB and axb will get onto another passing pawn. But if cxR then immediately exR=Q#. So just try RxR
46.e8=Q RxQ
47.Rxe8#
(B)
44.Rxc5 .... Bf3 going defensive (ready for Be2 to block R@e1)
45.e7 Be2
46.Re5 Re8
47.Bxe8 h6 (give K some breathing)
48.Bg6 and Black has nothing more except bxa3 rushing the pawn, which could never queen due to R@e1, or, simply, White queens first. see what's missing.... |
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| Jun-18-16 | | stst: Nothing significant missed...the game goes for some delay because of a last-resort attempt to rush the b-pawn, which could not squeeze out any real juice... then after some exchanges, same back-end smother on Black.
Roughly a Wednesday POD. |
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| Jun-18-16 | | mel gibson: I never got this one.
The computer agrees with the text move.
43 Rfe1.
Depth 19 score +3.86 |
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| Dec-29-18 | | Saniyat24: Naka had so much space advantage in this game that, Jon Ludvig did not find a wall to Hammer....! :D |
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Kibitzing
