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Later Kibitzing> |
Sep-19-12
 | | pittpanther: I too thought that things were not that clear for white after 28. Rg1 Ne5. White is better and will probably end up two pawns up but with there still being play left. I expect Wednesdays to have a more decisive combination. |
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Sep-19-12
 | | kevin86: The rooks squeeze out black's king! |
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Sep-19-12
| | benveniste: Babes, I'm afraid I don't see a win or even a clear advantage for White after 28.  df6  xf6. |
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| Sep-19-12 | | stst: <After <28.Rg1 Ne5> I couldn't find any decisive moves. g6/h7 are under atack and there is no mate in sight.>
--- Yeah, this is about the toughest defense Black got, and needs to be addressed.
Offer two courses after this:
(C)
29.Rxg7 Rxg7
30.Rxg7 and White can connect the two N's via Ndf6
(D)
29.Rh1+ Bh3
30.Rg5 Rxh7
31.Rxe5 and Black's K is still locked on the h-file.
In either case, Black prolong the game, but clearly White has the edge. |
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Sep-19-12
 | | agb2002: White has a knight and a pawn for a bishop.
Black threatens 28... Rxh7.
The first move that comes to mind is 28.Rg1, with the mate menace in three (29.Rh1+ Bh3 30.Rg4+ Kh5 31.Rxh3#) but after 28... Ne5 (to prevent Rg4) 29.Rh1+ Bh3 30.Rxh3+ Kxh3 31.Ng5+ Kg2 32.Nxf7+ Nxg6 (32... Kxf3 33.Nxh8 + -) 33.Nxh8 Nxh8 34.e5 g5 35.e6 Ng6 36.e7 Nxe7 37.Nxe7 Kxf3 38.b4 g4 the ending looks bad for White. -----
Another option is 28.Rg4+:
A) 28... Bxg4 29.Rxg4+
A.1) 29... Kh3 30.Ng5+ Kh2 31.Nxf7 + - [N+P].
A.2) 29... Kh5 30.Ng5
A.2.a) 30... Rff8 31.Ne6
A.2.a.i) 31... Rf7 32.Ndxf4+ Rxf4 (32... Kh6 33.Rh4#) 33.Nxf4+ Kh6 34.Rh4+ Kg5 35.Rxh8 Kxf4 36.Rf8+ + - [R+2P vs N]. A.2.a.ii) 31... Ne5 32.Rg5+ Kh6 33.Rxe5 + - [2N+P vs R]. A.2.a.iii) 31... Rhg8 32.Nxf8 Rxf8 33.Rxg7 + - [2P].
A.2.b) 30... Rhf8 31.Nxf7 Rxf7 32.Nxf4+ + -.
A.2.c) 30... Re7 31.Nxf4+ Kh5 32.Nge6 + -.
A.2.d) 30... Rf6 31.Nxf6 gxf6 32.Ne6 Ne5 33.Nxf4+ Kh6 34.Rh4+ Kg7 35.Rxh8 Kxh8 36.Nd5 Nxf3 37.Nxf6 + - [2P]. B) 28... Kh5 29.R6g5+ Kh6 30.Rh4#.
C) 28... Kh3 29.Ng5+ Kh2 30.Nxf7 + -.
-----
The move 28.Ndf6 Rxf6 (28... gxf6 29.Rh6#) 29.Nxf6 gxf6 30.Rg1 doesn't look better than 28.Rg4+. -----
I think I'd play 28.Rg4+. |
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Sep-19-12
| | enoordff: 28 Rg1 Ne5 looks dangerous for white (g6, h7 and f3 are hanging). Simpeler seems 28 Rg4+ Bxg4 29 Rxg4 Kh5 (Kh3 30 Ng5+) 30 Ng5 Rf8 31 Ne6 Rf7 32 Ndxf4+ Kh6 33 Rg6+ Kh7 34 Ng5+ Kg8 35 Nxf7 Kxf7 and white is two pawns up and his position is safe after 36 Rf4 for instance. |
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| Sep-19-12 | | gofer: I looked at this quickly this morning and liked <28 Nf6> but came back to
ending up wanting to play <28 Rg1 a black move 29 Rh1+ Bh4 30 Rg4+ mating>. This evening with a bit more time on my hands I can't make <28 Rg1> work. I think the contination could be...
<28 Rg1 Ne5!>
<29 Rh1+ Bh3>
<30 Rxh3+ Kxh3>
<31 Ng5+ Kh4>
<32 Nxf7 Nxg6>
<33 Nxh8 Nxh8>
<34 e5 Nf7>
<35 e6 Nd6>
<36 Nxf4 ...>
But there are some problems with this line...
1) It wins a single pawn
2) It is 9 move variation on a Wednesday
So I have to check what really went on....
~~~
No way! <28 ... Rxh7???> walking into the mate, surely <28 ... Ne5> is better! ~~~
Even worse! <30 Rxh3+> isn't as good as <30 Ng5>. This really was a miserable
POTD.... |
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Sep-19-12
 | | M.Hassan: "Medium/Easy"
Whie to play 28.?
White has a Knight for a Bishop
28.Rg1
<if...Kh5 29.R6g5+ Kh6 30.Rh1+ Bh3 31.Rxh3#> 28............Rxh7
29.Rh1+ Bh3
30.Rg4+ exploiting the pin on the Bishop
30............Kh5
31.Rxh3#
This must be it. It took me longer compared to the other Wednesday puzzles. |
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| Sep-19-12 | | gofer: <stst>: I don't want to be too harsh, given the current climate,
but aren't
<29.Rxg7 ...>
and
<29.Rh1+ Bh3 30.Rg5 ...> both a little flawed...
29 Rxg7 <Rxh7  >
29.Rh1+ Bh3
30.Rg5 <Nxf3 >
My preference would be closer to <Abdel Irada>... |
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Sep-19-12
 | | sorokahdeen: Wow! The variation was more interesting than the problem. I've never seen that particular twist in the Rauzer Attack against the Najdorf before! |
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Sep-19-12
 | | scormus: <sorokahdeen> I thought I saw this once before here, and a Sunday puzzle at that. Maybe not, maybe as an alternative to 6 Bg5 .... no, it must have been something else. Yes, it is certainly interesting. A real streetfight variation. I must look out for the chance to play it OTB! |
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Sep-19-12
| | M.Hassan: 28....Ne5 Never occured to me and it ruins the solution!
<sigh> |
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| Sep-19-12 | | pogotheclown: Did Pelikan slip Wexler a few dollars to play Rxh7? |
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| Sep-19-12 | | rapidcitychess: <pogo>
Pelikan had a big bill. |
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Sep-19-12
 | | Alex56171: <After <28.Rg1 Ne5> I couldn't find any decisive moves. g6/h7 are under atack and there is no mate in sight.>
Fritz 6 agrees, <whiteshark>. |
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Sep-19-12
 | | morfishine: After seeing all the posts on <28...Ne5>, its comforting to know that its a viable defense in itself |
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| Sep-19-12 | | CHESSTTCAMPS: White is up a pawn and has the BK trapped on the edge, which looks like a nice setup for an edge mate, but it is not so easy to execute. Black threatens 28... Rxh7, and this move refutes the mistake 28.Rxg7(?). This leaves two promising-looking candidates for white, 28.Rg1 and 28.Ndf6, which I found quickly enough but had trouble working through. I could not find anything satisfactory after 28.Rg1 Ne5! (Rxh7?? 29.Rh1+ Bh3 30.Rg4+) 29.Rh1+ Bh3 30.Ng5 (30.Rxh3+!? Kxh3 31.Ng5+ Kg3 32.Nxf7 Nxg6 33.Nxh8 Nxh8 34.e5 Kxf3 35.e6 Ng6 36.Kd2! may just squeak through, but looks tricky) Nxg6 31.Nxf7. 28.Ndf6! threatens 29.Rh5# and liquidates favorably:
A) 28... gxf6?? 29.Rh6#
B) 28... Rxh7 29.Nxh7 and black's g-pawn also falls.
C) 28... Rxf6 29.Nxf6 gxf6 30.Rg1 Ne5 31.Rxf6 and the f4 pawn must fall, with white holding R+2Ps+ extra pawn on the Q-side versus N+B, and BK trapped on the h-file. C.1) 30... Bh3 31.Rxf6 is similar.
C.2) 30... other 31.Rh1+ Bh3 32.Rg4+ wins.
Time for review.... |
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Sep-19-12
| | James D Flynn: White is a P up, however, more importantly Blacks K is trapped on the h file and White threatens mate in 4 by Rg1, Rh1+ Bh2, Rg4+ Kh5, R xh3#. Black can counter this by 28.Rg1 Ne5(if Bh3 29.Rh1 Ne5 transposes) 29. Rh1+ Bh3 30.Ng5(if R6g1 Rxh7 31.Rxh3+ Kxh3 32.Rh1+ Kg2 33.Rxh7 Kxf3 and Black picks up the P on e4 and pushes his f4 pawn to victory) Nxg6 31.Nxh3(if Nxf7 Rf8 32.Nd6 Ne4 and Black will win the f3 P and the game.)Rh6 32.Nxf4+ Kg5(if Kg3 33.Rxh6 gxh6 34.Nxg6 RXf3 35.Ne5 Bg4 36.Nxf3 Kxf3 and Blacks h pawn will win the game.
28.Rg4+ Bxg4 29.Rxg4+ Kh5 30.Ng5 R7f8 31.Ne6 Rfg8 32.Nxg7+ Rxg7(if Kh6 33.Nf5+ Kh5(or Kh7) 34.Nf6#) 33.Rxg7 Rf8 34.Rg4 Ne5 35.Rxf4 and Black must exchange Rs or lose another P, either way Whites Q-side pawns will win the endgame. |
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Sep-19-12
| | James D Flynn: I just looked at the game continuation: a pathetic defense by Black, I stand by my idea that 28....Ne5 wins for Black after 28.Rg1. |
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| Sep-19-12 | | JG27Pyth: @<johnlspouge> Thanks for the kind words mate! (.90 eh? No partial credit -- bleh!) Thanks for digging up Glucksberg vs Najdorf, 1929 ... No false modesty here, that was my kibitzing's finest hour by far and I'd forgotten all about it. Not long after, <Once> took the comic-creative kibitz to extended heights I'd never considered and I sheepishly packed up my watercolors and moved on. FWIW -- I'm <still> laughing at <aazqua>'s gargantuan self-regard. As for <I'm envious, <Pythy>. I <never> posted anything so good that someone accused <me> of using an engine.> That's what had me apoplectic with rage, it wasn't anything special at all. It was merely complete and without gross error. Actually, it was all POTD's fault. Like a good cg kibitzer, I ran down all the branched variations of a very ordinary mate in 5. To my critic this was all too obviously completely beyond my capacity! |
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| Sep-19-12 | | francis2012: Oh @#$%! I missed the simple Rg1! The line I think in this puzzle is xg7 xg7, xg7 and connect the two s in next move, yes White is winning because of pawn advantage in the endgame but g1 is the best. :D |
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Sep-19-12
 | | Conrad93: 28...Bh3 would have made the puzzle better. |
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| Sep-19-12 | | LoveThatJoker: <29. Rxg4+ Kh5>
(Best. 29...Kh3? 30. Ng5+ Kh2 31. Nxf7  )
<30. Ng5 Rf8>
(30...Rf6!? 31. Nxf6+ gxf6 32. Ne6 Ne5 33. Nxf4+ and White is up two pawns, but this actually may be Black's best attempt to stay in the game) <31. Ne6 Rf7>
(31...Re8?? 32. Ndxf4+ Kh6 33. Rh4#; 31...Ne5 32. Rg5+ any 33. Rxe5 ) <32. Ndxf4+ Rxf4>
(32...Kh6?? 33. Rh4#)
<33. Nxf4+ Kh6 34. Rh4+ Kg5 35. Rxh8> LTJ |
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| Sep-20-12 | | LoveThatJoker: Stockfish confirms that 29. Rxg4+ leads to a (+3.00) winning evaluation. It is good for the full point/correct solve. LTJ |
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Sep-21-12
| | Conrad93: 29.Rxg4 isn't physically possible. |
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