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| May-24-08 | | nmchessknight: Nice removal of the defender at the end |
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| May-29-08 | | Riverbeast: A nice game indeed, but I wonder what white would have done if black played 32...Bf6 instead of 32...a5 |
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| Jul-31-10 | | ventricule: I need some explanation about this one. |
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Jul-31-10
 | | OBIT: This one took quite a lot of thought. I'll be very surprised if the winning plan is something as simple as yesterday's. I think the move is 21. Ne4. For this move to be tactically justified, there are two continuations for which White needs to be ready: (a) 21...fxe4 22. Bxe4 Rfe8 23. Qh7+ Kf8 24. Nxe6+ Rxe6 (forced, since 24...fxe6 allows 25. Qxc7) 25. dxe6. White is up rook and three pawns for two bishops, plus he has the initiative. (b) 21...Bxd4 22. Rxd4 fxe4 23. Qg5+ Kh8 24. Qf6+ Kg8 25. Rdxe4 Rfe8 26. Rg4+ Kf8 27. dxe6. The threat is 28. e7+ Rxe7 29. Qh8#. It appears the only way to stop this threat is 27...Rxe6 28. Rxe6, and again White is up material. Of course, Black can refuse to take the knight, but then I think there is no question White has the initiative. There are a lot of tactical possibilities in this position, and I'm sure other posters will be pointing out other nice lines. |
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Jul-31-10
| | OBIT: Well, 21. Ne4 is in fact the move played, but, man, there is a lot of play if Black refuses the sacrifice. I looked at 21...Qe7, and one line that looks promising is 22. Nxf5 exf5 23. Ng5 Bxg5 24. Rxe7 Bxe7 25. Qxf5. Black has a rook and two minor pieces for the queen and two pawns, but his position looks shaky, with White threatening Be4 and Qg4+. If then 25...Nd6 26. Qg4+ Kh8 27. Qd4+ followed by Qxb6 maintains the initiative. |
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Jul-31-10
 | | al wazir: I found what looked like a promising line: 21. dxe6 Bxe4 (21...fxe6 22. Nxe6) 22. Rxe4 Rxe4 23. Qg5+ Kh8 24. Qf6+ Kg8 25. exf7+ Qxf7 (25...Rxf7 26. Re8+) 26. Qxe4 Bxg2 27. Kxg2 b5 28 Nd5. (Now, not 28...Rd8 because of 29. Nf6+ or 28...Re8 because of 29. Rxe8+ Qxe8? 30. Nf6+.) White is a ♙ up and is threatening 29. Re7. I think it's winning, but I can't prove it. (Needless to say, I only saw the first five or six plies before peeking -- but I bet Valerga didn't calculate the whole sequence starting from 21. Ne4 either.) |
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| Jul-31-10 | | dzechiel: White to move (21?). Material even. "Very Difficult." While I haven't checked, I'm pretty sure that I found the key move to this position very quickly. For me, the tip off was the location of the white queen and the gash in the black king's defensive pawn structure. I wanted a white piece to aim at h7, and I noticed that a bishop on the b1-h7 diagonal, along with the removal of black's f-pawn would do the trick. That's the moment I decided to investigate... 21 Ne4
And it only took another moment to see that this knight was threatening 22 Nxf6 AND that black dared not to capture as after 21...fxe4 22 Bxe4 looked really yummy. A sample line could go 22...Rfe8 23 Qxh7+ Kf1 24 Nxe6+ (forking king and rook) 24...fxe6 25 Qxc7. So, taking the knight is no good, what CAN black do? Some candidates are: - 21...Be5
- 21...Bxd4
- 21...Bg7
- 21...Be7
- 21...Qe7
The first of these
21...Be5
looks like it loses quickly to
22 Ng5
Lines similar to above like
22...Rfe8 23 Qxh7+ Kf8 24 Ngxe6+ fxe6 25 Nxe6#
wind it up in a hurry. The next try is
21...Bxd4 22 Ng5 f6 23 Nxe6 Qf7 24 Qxf7+ Rxf7 25 Nxd8 looks like it's winning an exchange. OK, next up is... 21...Bg7 22 Ng5 h6 23 dxe6 hxg5
On 23...fxe6 24 Ngxe6 picks up an exchange.
24 e7
forking the rooks and going up an exchange anyway. OK, next up is... 21...Be7
This is the most difficult line for me so far. I *think* white can get away with 22 Ng5 Bxg5 23 Qxg5+ Kh8 24 dxe6
With the threat of 25 e7.
24 fxe6
On 24...Rg8 25 Qf6+ Rg7 26 e7 Re8 27 Nxf5
and black is losing an exchange at best. Finally
21...Qe7
I admit I'm stumped here. I see a line where white gets the black queen, but has to give up a rook and two minor pieces, which seems inadequate. I'm going to go with this, even though I'm uncertain about 21...Qe7, there is too much good stuff in these lines. Time to check. |
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| Jul-31-10 | | Once: So there I was in a business meeting, suited and booted and doing my work thang. It was a hot day and the closest we could come to air conditioning was to open the windows. And that's when my mind started to wander. The young lady opposite me has the most amazingly blue eyes. How come the book was called the Three Musketeers when there were four of them and they never fired a musket? Have you ever noticed that the album "Bat out of Hell" tells the stories of a man's life through his relationship with women, from teenage fantasies (Bat out of Hell) through initial fumblings (Paradise by the Dashboard Light), actual relationships (Two out of Three Ain't Bad) to old age and fond memories of a life well lived (For Crying out Loud). Bugatti Veyron or Ferrari? Is the new A-Team movie going to be as awful as Transformers 2? What on earth is the attraction about oysters? And suddenly a voice from the other side of the room, and all eyes turn to me. "Iain, what do you think of this idea?" Ah, um, well, maybe ... sorry, what was the question again? And so it was with today's puzzle. I was fixated about the square e6. So my mind wandered around 21. de, 21. Nxe6, even 21. Rxe6. Possibly preceded by b3 to kick the black knight away. And then a bolt from the blue - 21. Ne4? Never saw that one coming. But now you mention it, yes it is a good move! |
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| Jul-31-10 | | whiteshark: My run of good luck ended today. I saw <21. Ne4 Bg7 22. Ng5 h6> but lacked of imagination to proceed from here. I completely missed pushing the pawn to e7, which is especially frustrating as I've already done some research on this pattern: Game Collection: 51- -> Birth and Power of a Central Passed Pawn |
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| Jul-31-10 | | David2009: D Valerga vs D Lemos, 2008 White 21? 21 Ne4 is promising but unclear. 21...Be7 (if 21...fxd4 22 Bxf4 looks winning. 22...Rd8 to prevent mate and White can choose between Bxh7+ Kg7 Re4 etc and Qxh7+ Kf8 Bg6 both of which look very strong) 22 Ng5 Bxg5 23 Qxg5+ Kh1 24 Qf6+ Kg1 25 and White can choose between perpetual check or play for more
with dxe6 starting with the Q at either f6 or g5. 21...Bg7 seems weaker: 22 Ng5 h6 forced 23 dxe6 fxe6 (e7 was the threat) 24 Ngxe6
winning back the exchange. There are too many possibilities. Time to see how the game went.
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Well I got the first move but nothing much else. Quarter credit.
click for larger view Valerga vs Lemos 2008, 21?
Crafty End Game Trainer defends with 21 ...dxe4 22 Bxe4 Rd1 23 Bxh7+ Kg7 23 Re4 Bxd5 or alternatively 23 Qxh7+ Kf8 24 Bg6 Bxd5. On-line link: http://www.chessvideos.tv/endgame-t... Playing over the other variations Black had better defences than those I had foreseen. Time to digest other kibitzes. |
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| Jul-31-10 | | gofer: I took a while looking at this (Nxe6/Nxf5/Rxe6/dxe6/d6) and slowly it dawned on me
that any mate threats are going to stem from getting rid of Bf6, so how about the
obvious and simple Ne4!
21 Ne4 ...
21 ... fxe4 22 Bxe4 h6 23 Qxh6 ... 24 Qh7#
So now black has two options to avoid the mate threat of 22 Nxf6+ Kg7 23 Qg5 Kh8 24 Qh6 ... 25 Qxh7# Option 1) support Bf6
21 ... Kg7 22 Nxf5+ exf5+ 23 Nxf6 (Kxf6 24 Qh6#) Ne5 24 Rxe5 Qxe5 25 Qg5 Kh8 26 Qh6 winning the queen. 21 ... Qe7 22 Nxf5 exf5 23 Ng5 Bxg5 24 Rxe7 Bxe7 25 e6 which is probably winning for white.. Option 2) move Bf6
21 ... Bxd4/Bh8 22 Ng5 f6 23 Nxe6 winning
21 ... Bg7 22 Ng5 h6 23 Ngxe6 fxe6 24 Nxe6 winning
21 ... Be7 22 Ng5 Bxg5 23 Qxg5+ Kh8 24 Qf6+ Kg8 25 dxe6 winning Time to check... |
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Jul-31-10
 | | scormus: Fascinating attacking position for W, promise of lots of alternative moves for both sides. I dont think its another "find the lady" thing.
I fancy 21 Ne4, attacking the B which wont be easy to defend, and with an eye on g5. First see if the sac is OK 21 ... fxe4 22 Bxe4 Rfe1 (forced) 23 Qh7+ Kf8 24 Nxe6+ Rxd6 25 dxe6. Now its N+B for R+3p and W is threatening to win a piece. Cannot explore evey line but the most likely looks like 25 ... Bxe4 26 Rxd8+ Bxd8 27 e7+ Kxe7 (forced) 28 Rxe4+ If ... Kf6 29 Qh6+ Kf5 30 Qf4+ is a won endgame. Or ... Kd7 29 Qf5+ Kd6 Qf4+ and a similar ending What if B declines the N sac? A possible line might be 21 ... Bxd4 22 Ng5 f6 23 Nxe6 Bxf2+ (might as well get a p for it) 24 Kxf2 Qf7 25 Qxf5 Qg6 26 Qxg6 hxg6 27 Nxd8 followed by Re7 Lots of lines I havent looked at, possibly there is something better fefence for B or more decisive for W. Now to check the game and comments, then get on with some jobs at home |
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Jul-31-10
| | scormus: 21 ... Bg7. I might have guess something like that. |
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| Jul-31-10 | | Patriot: Well I am very disappointed in myself, since I never looked at the simple 21.Ne4 threat. I spent too much time trying to make 21.Nxf5 work. Lesson: Look wide before you look deep. |
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Jul-31-10
 | | gawain: Complex and interesting. Nicely done by White.
It looks (according to Hiarcs) like White missed an even better continuation at move 25. W's actual decision to let B give up the exchange to get the d4 knight off the board allows a longer struggle. 25 exf8(Q)+ I think. then ...Kxf8 26 Nxf5 Rxd1 27 Rxd1 Nxb2 28 Qxg5 f6 29 Qxg7 will simplify to an easy win. |
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Jul-31-10
| | gawain: Also, in the game continuation, 28 Rd8 would have wrapped it up immediately.
click for larger viewIs there any reply to this?
But that takes nothing much away from Valerga. He found the best moves when he needed them |
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| Jul-31-10 | | sfm: Cute little finishing move. I think Black should have tried 32.-,Bf6, after 32.-,a5 it is over. |
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Jul-31-10
| | al wazir: <gawain: Also, in the game continuation, 28 Rd8 would have wrapped it up immediately. Is there any reply to this?> How about 28...Qc6+ 29. Kf1 (29. Kg1/Kh2? Nf3+) ? |
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| Jul-31-10 | | ler: I do not found nothing to answer Riverbeast 32...Bf6.Someone do?Maybe better was 32.b3,and if 32...Bf6.33.a4.Qc6.34.Qh6. |
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| Jul-31-10 | | kevin86: No clue on this one-must be above my pay grade. |
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| Jul-31-10 | | DanDylan: I'll venture to share my patzer thoughts for all you interested teachers. The position is complicated, but a few minutes examination leads me to note that if the f5-pawn were to disappear, White has 21.Be4! So, the most promising first move in my mind is 21.Ne4, after which I see three candidates for Black: 21...Qe7 22.Nxf5 exf5 23.Ng5, which I call good for White;
21...fxe4 22.Bxe4, also good for White;
21...Bxd4 22.Ng5, again ganging up on h7.
I guess I'd have played 1.Ne4; I studied the problem for 10 minutes. Now I'll check and see how badly I'd be torn up. |
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| Jul-31-10 | | thegoodanarchist: Valerga spoils a won game with 32. b4? but Lemos failed to find the refutation 32...Bf6!?  |
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| Jul-31-10 | | BOSTER: Because h7 is a weakness, and at this moment bishop on f6 is blocking move f7-f6, and in addition Qc7 unprotected I have to check moves like Re4, Ne4 and Nxf5. Main iea to put white bishop on e4.
I would play 21.Ne4 because this is more forced move . 21...fxe4 22.Bxe4 Rfc8 23.Qxh7 Kf8 24.dxe6 (threat Nf5 and Rd7).
After this there are too many lines,and none of them are forced. |
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Jul-31-10
| | gawain: To <al wazir> who asked: How about 28...Qc6+ 29. Kf1 (29. Kg1/Kh2? Nf3+) ? [after <gawain: Also, in the game continuation, 28 Rd8 would have wrapped it up immediately. Is there any reply to this?>] Nice try. If 28 Rd8 Qc6+ White must play 29 f3! then if 29...Qxf3+ 30 Kg1 Black, surprisingly, has nothing left to try 
click for larger viewThere are still a couple of pitfalls for White if Black tries 30...Nd3 in this position but if W plays Qe3 now or after Rxe8 he'll be fine |
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Jul-31-10
| | scormus: <DanDylan> not bad for 10 minutes work! |
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Kibitzing
sac: 23.dxe6