|
< Earlier Kibitzing · PAGE 3 OF 3 ·
Later Kibitzing> |
| Sep-19-12 | | kevin86: The rooks squeeze out black's king! |
|
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. |
|
| 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. |
|
| 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+. |
|
| 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. |
|
| 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.... |
|
| 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. |
|
| 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>... |
|
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! |
|
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! |
|
| Sep-19-12 | | M.Hassan: 28....Ne5 Never occured to me and it ruins the solution!
<sigh> |
|
| Sep-19-12 | | pogotheclown: Did Pelikan slip Wexler a few dollars to play Rxh7? |
|
| Sep-19-12 | | rapidcitychess: <pogo>
Pelikan had a big bill. |
|
| 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>. |
|
| Sep-19-12 | | morfishine: After seeing all the posts on <28...Ne5>, its comforting to know that its a viable defense in itself |
|
| 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.... |
|
| 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. |
|
| 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. |
|
| 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! |
|
| 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 |
|
| Sep-19-12 | | Conrad93: 28...Bh3 would have made the puzzle better. |
|
| 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 |
|
| 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 |
|
| Sep-21-12 | | Conrad93: 29.Rxg4 isn't physically possible. |
|
| Sep-17-21 | | Saniyat24: The perfect Najdorf...! |
|
 |
|
|
< Earlier Kibitzing · PAGE 3 OF 3 ·
Later Kibitzing> |
Kibitzing
sac: 28.Rg1