|
< Earlier Kibitzing · PAGE 2 OF 2 ·
Later Kibitzing> |
| Nov-23-10 | | agb2002: White has a bishop and a knight for the bishop pair and a pawn. Black would probably play 22... Qc6, unpinning the e-pawn, protecting g6 and intending ... e4. The black castle is poorly defended. The convergence of White's queen and bishop on g6 suggest 22.Nxh7: A) 22... Kxh7 23.Qxg6+ Kg(h)8 24.Qh7#.
B) 22... Qc6 23.Nf6+ Qxf6 (23... Kf7(8) 24.Nxd5+; 23... Kh8 24.Qh4+; 23... Bxf6 24.Qxg6+ Kf8 25.Rxf6+) 24.Rxf6 Bxf6 25.Qxg6+ Bg7 26.Rf1 e4 27.Rf7 + -. B') 22... Qc6 23.Bxg6 is not so clear
B'.1) 23... Re7 24.Nf6+ Bxf6 (24... Kf8 25.Nxd5+; 24... Kh8 25.Qh4+) 25.Be8+ Rg7 26.Bxc6 Bxc6 (26... Rxg3 27.Bxd5+ and 28.Bxa8) 27.Rxf6 Rxg3 (27... Bb7 28.Rg6) 28.hxg3 + - [R+P vs B]. B'.2) 23... Re6 24.Bf5 Rh6 25.Ng5 Re8 and White is better but looks unnecessarily complex. C) 22... Qb7 23.Qxg6
C.1) 23... e4 24.Nf6+ Kf8 25.Nxd5+ Kg8 26.Nf6+ Kf8 27.Nxe8+ is a massacre. C.2) 23... Bf7 24.Nf6+ Kf8 25.Nxe8 Rxe8 26.Rxf7+ Qxf7 27.Rf1 + -. D) 22... Bf7 23.Nf6+ Bxf6 24.Rxf6 Re7 25.Bxg6 Bxg6 (25... Kg7 26.Bxf7+ Kxf6 27.Qg6# or 27.Rf1#) 26.Rxg6+ Rg7 27.Rxg7+ Qxg7 28.Qxg7+ Kxg7 29.Rxe5 Rd8 30.Kg1 Rd1+ 31.Kf2 Rb1 32.Rxc5 Rxb2 33.Kf3 + -. E) 22... Re7 23.Qxg6 Bf7 24.Nf6+ Kf8 25.Nd5 Qb7 26.Nxe7 Qxe7 27.Rxf7+ Qxf7 28.Rf1 + -. F) 22... Re6 23.Bxg6 Qc6 transposes to B'.2. |
|
| Nov-23-10 | | gars: I hate everything but Mondays! |
|
| Nov-23-10 | | zb2cr: Hi <JimfromProvidence>, In your line, continuing from your diagram, doesn't White just play 24. Bf7+, Kxh7; 25. Bxe6, Be6; 26. Qh4+, Bh6; 27. Qe7+, Bg7; 28. Rxe5, Bd5; 29. Rh5+? What am I missing? |
|
| Nov-23-10 | | knight knight: Having trouble today, think this is a tough Tuesday. Ok I don't think the solution starts with 22. Bxg6, black seems to have just enough defensive resources to escape mate or loss of material. Instead I see 22. Nxh7. Black cannot recapture, 22...Kxh7 23. Qxg6+ Kg8/h8 24. Qh7#. White equalizes material and threatens 23. Bxg6 with a decisive attack Possible defences:
a) 22...Bxg2+? 23. Qxg2
b) 22...Bf7 23. Bxg6
c) 22...Bh8 23. Bxg6
d) 22...Re6 23. Bxg6 again
e) 22...Bf8 23. Nf6+
Time to check... |
|
Nov-23-10
 | | scormus: I just couldnt get this. If 22. Qa3 or Qa4 then ... Bh8 seems to hold things, at least enough for it not to be the solution of a Tuesday puzzle. And after 22 Nxh7, ... Re6 keeps B in the game <Jim, David> thanks for keeping me from losing my sanity |
|
| Nov-23-10 | | caissafan1963: M. Hassan, I don't see how the h-pawn can capture the Bg6 after you play h6... |
|
| Nov-23-10 | | psmith: <David2009> and <JimfromProvidence> Fritz 5.32 (old, free, Fritz) thinks White is clearly winning after 22...Re6 23 Ng5 Rc6 24. Qh4 Bf6 25. Bxg6  . Black's Kingside is wide open. Suggest a defense. |
|
Nov-23-10
 | | benveniste: Did anyone else peg this as a "find a better move than ♘xh7" type of puzzle? I finally gave up looking and was prepared to put another in the "why I'm a woodpusher" column. |
|
| Nov-23-10 | | estrick: <David2009> I played http://www.chessvideos.tv/endgame-t... for a couple of hours and couldn't find the win for White after 23 ... Rc6. But with <psmith>'s continuation <22...Re6 23 Ng5 Rc6 24. Qh4 Bf6 25. Bxg6> I was able to get to an endgame that I could win with the following:
25 ... Bxg5 26.Qxg5 Qxg7 27. Qxe5 Bxg2+ 28Kxg2 Rxg6+ 29. Kh1 Qb7+ 30. Qe4 Qxe4 31. Rxe4 |
|
| Nov-23-10 | | MiCrooks: psmith...there are a number of defenses. Yes, White is winning here but there is still work to do and chances for a blunder in normal play. Re6 is clearly the best retort. Your line is not even, necessarily, the best for White, but in your position Black should trade down to the major piece ending and pray. So Bxg5 Qxg5 Qg7 where White is perhaps lucky to have Qd2 hanging onto everything! Then Black can play Qxg6 Qxd5+ Qxe6 and now the real problem here is that Black is likely to drop another pawn here making any save really tough. But in either the Rook ending or the Queen ending Black would have some chances to catch White in a screw-up. |
|
| Nov-23-10 | | kevin86: Another easy one...the knight is immune on penalty of mate and to leave him there makes the attack too devastating to continue. |
|
| Nov-23-10 | | Ghuzultyy: Tuesday puzzle. Let's go.
Black is in some trouble here because white has developed greatly on Black's kingside. Its the right time to go for the Black King.
But How?
22.Nxh7!? seems good. Black can't play 22...Kxh7 because after 23.Qxg6 it will be mate in one. So what if black doesn't accept the sac? Black can't do anything against Bxg6. Black doesn't only lose a pawn, also loses the shield of the king. Its a win by white. ----
I checked the game and my analysis seems correct. 2 points for today making a total of 3 points. |
|
Nov-23-10
 | | Jimfromprovidence: <zb2cr> <In your line, <22 Nxh7 Re6 23 Bxg6 Qc6>, continuing from your diagram, doesn't White just play 24. Bf7+, Kxh7; 25. Bxe6, Be6; 26. Qh4+, Bh6; 27. Qe7+, Bg7; 28. Rxe5, Bd5; 29. Rh5+? What am I missing?> Instead of 26... Bh6, black has 26...Kg8.
click for larger view I can't see how white make progress here. |
|
| Nov-23-10 | | vangogh228: Why not 23. ... Bf7 . Black loses the exchange, but what else is wrong with it? Is that enough to resign over? |
|
| Nov-23-10 | | BOSTER: <Once> <Next, remove the e4 pawn and the Nf6 with 20.Nd5>.
But black are not obliged to play 20...Nxd5 and open b1-h7 diagonal for white.
They should play 20...Qc6 and all this only for innocent children. |
|
| Nov-23-10 | | patzer2: For today's puzzle solution, the mate threat after the demolition sham sacrifice 22. Nxh7! gives White a winning attack. However, the followup is not easy. The best winning line seems to be one the given by <psmith>. Playing it out move-by-move with Fritz 10, White secures a clear win after 22. Nxh7 Re6 23. Ng5 Rc6 24. Qh4 Bf6 25. Bxg6 Bxg5 26. Qxg5 Qg7
27. Qd2! (more complicated but stronger than 27. Qxe5  ). From here play with Frtiz continues 27...Rd6 (27... Qxg6 28. Qxd5+ Qe6 29. Qe4 Rd8 30. Qh4 Rdd6 31. Re3 Qe8 32. Rg3+ Rg6 33. Qh5 Rce6 34. Rh3 Rh6 35. Qxe8+ Rxe8 36. Rxh6 ) 28. Bf7+ Kh8 29. Bxd5 Rad8 30. Re3 Rxd5 31. Qe2 R5d6 32. Rg3 Rg6 33. Rxg6 Qxg6 34. Qxe5+ Kg8 35. Qxc5 Rd6 36. h3 Rf6 37. Rd1 Qe8 38. Qg5+ Kf7 39. Qh5+ Kf8 40. Qxe8+ Kxe8 41. Rd2 . |
|
| Nov-23-10 | | wals: Easy, pleasy.
Rybka 4 x 64
depth: 19 : 9 min :
The first Black blunder
(+2.37):20...Nxd5. Best, Bxd5,  0.58.
1. (0.58): 20...Bxd5 21.exd5 c4 22.Be4 Qd6 23.Qh4 Ra7 24.Ne6 Rf7 25.c3 Ree7 26.Ng5 Rf8 27.Rd1 Rfe8 28.Ne6 Rd7 29.h3 Rxe6 30.dxe6 Qxd1 2. (0.83): 20...Qd6 21.Qh3 h6 22.Nxf6+ Bxf6 23.Qxh6 Bxg5[] 24.Qxg5 Rf8 25.b3 Kg7 26.Rf5 Rae8 27.Ref1 Bc6 28.h4 Bd7 29.Rxf8 Rxf8 30.h5 Rxf1+ 31.Bxf1 Be8 32.c4 Bc6 33.Kh2 b4 depth: 19 : 3 min :
The second Black blunder and the end of the road for Black.
(+10.76):22...Re7. Best, Re6, +2.42.
1. (2.42): 22...Re6 23.Ng5 Rd6 24.Qh4 Bf6 25.Be4 Bxe4 26.Qxe4 Rad8 27.Qxg6+ Qg7 28.Qxg7+ Kxg7 29.Ne4 2. (6.00): 22...c4 23.Qxg6 Re6 24.Nf6+[] Rxf6 25.Qh7+ Kf7 26.Rxf6+ Kxf6 27.Qg6+ Ke7[] 28.Qxg7+ Kd6 29.Qf6+ Kc5 30.b4+ cxb3 31.cxb3 Qd6 32.Rc1+ Bc4 33.b4+ Kc6 34.Be4+ Kd7 35.Qg7+ Ke6 36.Bxa8 Qd2 37.Rb1 Kd6 |
|
| Nov-23-10 | | emonys: hey ONCE did you notice that your everyday rantings, are becoming normal and nobody really comments anymore |
|
| Nov-23-10 | | WhiteRook48: i got it |
|
| Nov-23-10 | | M.Hassan: <caissafan 1963: I do not see how the h-pawn can capture the Bg6 after you play h6...>
Indeed!!! the reason is that I should have written 23.....hxg5
I did very bad in this puzzle and thank you for your comment and attention |
|
| Nov-23-10 | | David2009: <psmith: <David2009> and <JimfromProvidence>
Fritz 5.32 (old, free, Fritz) thinks White is clearly winning after 22...Re6 23 Ng5 Rc6 24. Qh4 Bf6 25. Bxg6 . Black's Kingside is wide open. Suggest a defense> Psmith - Congratulations! Your line works and I have nowdefeated Crafty EGT with it (link in my earlier post Yifan Hou vs J Terao, 2010). I had avoided this line because it allows 22. Nxh7 Re6 23. Ng5 Rc6 24. Qh4 Bf6! with dangerous counter-play and tactical threats - my pieces hang If I grab the pawn then might come 25. Bxg6 Bxg5 26. Qxg5 Qg7 and trying to visualise this I could see myself losing the double-attacked B with threats on g2 to follow - No thanks!
I then had a brief look at Qh3 (to avoid being pinned afer Bf6), saw it gave White nothing, so decided Bxg6 was the only serious winning attempt. In fact I had been afraid of shadows: on reaching the position 
click for larger view
(and knowing from your post that Fritz thinks White is winning) I find Qxe5! which is the pragmatic way forward. Crafty then exchanges into a Rook ending a Pawn down (my h2 Pawn), and then inexplicably exchanges Rooks to win my h Pawn back but entering a lost K&P ending. I'm not going to post the moves here because (a) the EGT's defence, though vigorous, is sub-optimum and (b) you may enjoy finding the win yourself. Quite generally I would encourage you to play these positions out against Crafty EGT. You will find (a) the EGT is tactically very astute and finds resources and pitfalls in apparently hopeless positions; (b) the EGT excels at defending openings of minor pieces against Q when material down; the EGT is fallible - it often exchanges into lost K&P endings and although it plays 4 men endings perfectly (by tablebase) it is vulnerable in 5 man endings. Consult posts to my forum for examples. Consult crafty chessforum for how to set up positions in Crafty EGT. <patzer2> Thanks for your analysis which I read after beating the EGT using <psmith>'s idea to start me off. Have you thought of enabling your own user forum - I have several times come across interesting ideas in your posts when things have moved on (i.e. the GOTD or POTD is several days old). <Once:> I always look out for your posts. You have produced some masterpieces but, inevitably, it is very difficult to keep up consistently original posts day after day. Many newspaper columnists compose / sound off weekly. |
|
Nov-23-10
| | scormus: <Once: ....Where will wants not, a way opens, so we say> a time of dragon slaying and the fight against the dark forces, when even the whitest of white might be dark inside. Internal bickering, private ambition, misplaced pride, enemy infiltration .... all these had weakened or resolve and tarnished our gold. We were passive, scared. Then a light appeared, and a voice, "Strike at the enemy where it is strongest." |
|
| Nov-23-10 | | Once: <scormus> And that's the point - when we attack at the point of greatest defence, we are not so much testing the enemy as testing ourselves. We are accepting a challenge that maybe only we can see, that matters to no-one except ourselves. We don't do these things because they are easy, we do them because they are hard, whether that is putting a man on the moon, fighting a battle, playing a game of chess, or putting a little bit of your soul and heart and courage into the written word. Some days it works, some days it doesn't. But wouldn't it be a grayer world (and a less interesting life) if all we have to look back on are the challenges we didn't face, the queen sacs we thought about but didn't play, the things we nearly said but then thought ... "naah, it won't work, I'll wait for a better occasion, a safer time"? This day, this time, this life, this precious moment - it will never come again. So let's dare to do and be damned, rather than dither and wait til it's safe. |
|
| Nov-23-10 | | chessmartialartist: The line 22. Nxh7 Re6 23. Ng5 Rc6 24. c4!? is a reasonable alternative to 24. Qh4 since 27. Qd2! is hard to spot in that line If one continue, 24...dxc4 25. Qh4 Bf6 26. Bxc4 Bxc4 27. Qxc4+ Kh8 28 Ne4, a position arises where white a tremendous positional advantage. Black has four isolated pawns, a bad bishop vs a good knight and an exposed king. 
click for larger view |
|
| Nov-23-10 | | CHESSTTCAMPS: White is down a pawn and has N+B for the bishop pair, but has more than adequate compensation for the small material deficit with all of his mobile force directed towards the black king. Black's Bd5 is active enough, but the DSB is doomed to passive kingside defense. A very serious defect in the black position is the e-pawn, which is pinned and thereby prevented from neutralizing the white bishop with e4. The direct mate threat 22.Qh4 (which seems to be adequately defended by 22...Bc8) has the drawback of releasing the e5-pawn from the pin. Instead, white should strike immediately to demolish the kingside pawns: 22.Nxh7! and the g-pawn must also fall with disasterous consequences for black: A) 22... Kxh7? 23.Qxg6+ Kg8 24.Qh7#
Undoubtedly, the early kibitzers spotted this in seconds. Declining offers some hope for an error. B) 22... Re7 23.Qxg6 (primary threat 24.Nf6+) Re6 24.Rf6 (weaker is Nf6+ Rxf6 25.Rxf6 e4) Rae8 (Rxf6? 25.Nxf6+ followed by Nxd5) 25.Ref1 Qe7 (Qd6 26.Qxe8+ Rxe8 27.Rxd6) 26.Rxe6 Qxe6 27.Nf6+ wins. C) 22... Bf7 23.Bxg6 Bxg6 24.Qxg6 and 25.Nf6+ or Ng5 will be deadly D) 22... Re6 (best?) 23.Bxg6 (threatening 24.Bf7+ Kxh7 25.Qd3+) Rd8 24.Bf5 Rb6 25.Ng5 keeps a firm grip. Time to peek and see if there's something more decisive in line D... |
|
 |
|
< Earlier Kibitzing · PAGE 2 OF 2 ·
Later Kibitzing> |
Kibitzing
