|
< Earlier Kibitzing · PAGE 4 OF 4 ·
Later Kibitzing> |
| Jan-14-10 | | WhiteRook48: missed the Rf1+ idea
39 Bg3+ Rf2+ 40 Kg1 Rxf1+ 41 Rxf1+ is white's only chance |
|
| Jan-14-10 | | patzer2: For today's Thursday puzzle solution, Black's 28...Re1+! 29. kf2 Rf1+ 30. Kxf1 d2+  initiates a discovered check combination (supported by a skewer decoy sacrifice) for a winning attacking position. The follow-up 32...Re8! is essential to maintaining Black's decisive advantage. The final position is a very amusing illustrations of discovered check. After 38...Kxf7!, White can play a weak discovered check to win a pawn but Black can counter with a strong discovered check (e.g. 39. Bxh6+ Rf2+ ) to bring about a quick mate. |
|
| Jan-14-10 | | AxelBoldt: 36...Qe4 wasn't good, because it allowed 37.Rd1 with the idea 37...Nxg2 Rd4 or 37...Rxg2 38.Rd8+ Kh7 39.Qd3. Better was 36...Rxg2 37.Re1 Rf2 and then either 38.Qh3 Re2 or 38.Qg1 Nf3. |
|
| Jan-14-10 | | turbo231: I've now played rybka 5 times; 0-4-1. Rybka is getting better and i'm tired. |
|
| Jan-14-10 | | lightbishop c5e6: yes, got it, 28... Re1+! 29.Kf2 Rf1+! 30.Kxf1 d2+ forcing a new queen and breathing on White's king. |
|
| Jan-14-10 | | Blunderdome: I'm actually less sure about the 31. dxc1Q+ 32. Rxc1 Ne3+ 33. Ke2 Nxc4 line than I was originally. With 34. gxh3 White has two pawns for the knight and very strong kingside pawns, while Black's pawns are all isolated and weak. Still a win for Black? Fritz has proved very good at drawing it, but that could be my fault. |
|
| Jan-14-10 | | ROO.BOOKAROO: Note that in the final position, after 38. ...Kxf7, White's Rook on a1 has never moved during the whole game. And the h1 Rook didn't do much either. Meanwhile Black moved his rooks 9 times. |
|
| Jan-14-10 | | johnlspouge: < <patzer2> wrote: <johnlspouge: Toga seems to corroborate my impression that 28…Re1+ 29.Kf2 Rf1+ is unimpressive. At the end of your toga line <28...Re1+ 29. Kf2 Rf1+ 30.Kxf1 d2+ 31.Kf2 d1Q 32.Qxc4 Re8 33.Qf1 Qc2+ 34.Kg1 Nh4 35.Bf4 Re2 36.gxh6 Rxg2+ 37.Kh1 Qe4 38.h7+ Kxh7 39.Rd1>, Black's play looks impressive enough with a mate-in-two (i.e. 39...Rg3+! 40. Qf3 Qxf3# (or 40. Qg2 Qxg2#). > >Hi, <patzer2>. Yes, there are disadvantages to reporting complete variations just before going to work. I understand that you are yanking my chain, but please note my disclaimer that < [snip] (humans can improve near the end of the complete computer variations). > Congratulations, you are another winner ;>) |
|
| Jan-14-10 | | ILikeFruits: i smell...
something burning...
what could...
it be... |
|
| Jan-14-10 | | GaeBulg: I saw
1...Re1+ 2. Kf2 d2 3. Bxd2 Rxa1 4. Qxc4 Rb2
I don't know if that's any good though. The way the game played out may be a lot better, although Rybka seems to favor my line... |
|
| Jan-14-10 | | GaeBulg: Sorry, no Rybka favor's the game line at depth of 15 or higher. |
|
Jan-14-10
 | | Jimfromprovidence: Here’s another twist on this very interesting puzzle. 31 Kf2 below instead of 31 Qxc4 changes the dynamic of the puzzle, but not the solution!
click for larger view
Yes, 31 Kf2 prevents both 31…Ne3+ and 31 dxc1Q+. But after 31 Kf2 d1Q 32 Qxc4 Re8 we end up in the same position as the text!
click for larger viewNow the solution comes down to which move is better for white, the text 33 Qf1 or 33 gxh6+. |
|
| Jan-14-10 | | patzer2: <Johnlspouge> Your Toga analysis is usually so reliable and strong that I thought my Fritz move-by-move look might have missed something. I'm guessing that with a few more ply and a bit deeper look, Toga now confirms the 28...Re1+ 29. Kf2 Rf1+ 30. Kxf1 d2+ line is winning for Black? |
|
Jan-15-10
 | | LIFE Master AJ: Problem of the Day / Thursday; January 14th, 2010. (Black to play, 28 ... '?') 
click for larger view White: Kg1, Qf4, Bc1, Ra1; White Pawns: a2, c3, g2, g5, & h2. Black: Kg8, Nf5, Bc4, Rb8, Re2; Black Pawns: a6, c7, d3, f7, & h6. Comments: White's 21.bxc4? ruined a fairly decent position, 21.b3 appears to favor White. "  " Black's 25...QxN/e4!? looked good, but maybe was not best. White virtually blundered with 28.Qf4?, better was 28.QxN/f5, with probably an equal game. 28...Re1+; 29.Kf2, Rf1!+; sets up the winning discovery for Black, its the old promotion trick. |
|
| Jan-17-10 | | VargPOD: Thursday.
Position looks grim for black, but he has a forcing sequence up his sleeve. 28...Re1+ 29.Kf2 (forced) Rf1+! 30.Kxf1 (forced) d2+ 31.Qxc4 d1Q+ 32.Kf2 (forced) and position looks a lot better for black. Total 3/4 this week, 6,5/11 total. |
|
Jan-23-25
 | | takebackok: Saw 28...Re1+ 29. Kf2 Rf1+ 30. Kxf1 d2+ 31. Qxc4 d1=Q+ was happy however, not too sure after that. |
|
| Jan-23-25 | | mel gibson: I saw that but it took me over 1 minute.
Stockfish 17 says:
28. .. Re1+
(28. .. Re1+ (1. ... Re1+ 2.Kf2 Rf1+ 3.Kxf1 d2+ 4.Kf2 d1Q 5.Qxc4 Re8 6.Qf1 Qc2+ 7.Kg1 Nh4 8.Bd2 Qxd2 9.gxh6 Qxh6 10.Rd1 Qg5
11.Kh1 Re6 12.Qf2 Rf6 13.Qe2 Kg7 14.c4 Ng6 ) +4.91/47 473) score for Black +4.91 depth 47. |
|
Jan-23-25
 | | An Englishman: Good Evening: One quirk about this game--at the end of the combination on move 32, Black hasn't even restored material equality, having to settle for a mere positional advantage as compensation for his one pawn deficit. |
|
| Jan-23-25 | | King.Arthur.Brazil: Maybe, this is not to right move, but helps to think: 28...Re1+ 29. Kf2 d2 30. Qxd2 Rf1#.Let's try the move: 28...Re1+ 29. Kf2 Rf1+ 30. Kxf1 d2+ 31. Kf2 d1=Q A) 32. Qxc4 Re8 33. gxh6 Qe1+ 34. Kf3 Nh4+ 35. Kf4 (35.Kg4 Re4+ win the ♕) Qf2 + 36. Kg5 Re5+ 37. Kg4 Qf5+ 38. Kxh4 Re4+ 39. Qxe4 Qxe4+ and win the ♖ after capture ♙c3 .
B)Obviously not 32. Qxf5?? Qf1+ 33. Kg3 Qxf5.
C) But W can escape with: 28...Re1+ 29. Kf2 Rf1+ 30. Kxf1 d2+ 31. Qxc4 d1=Q+ 32. Kf2 Re8 where the situation is not clear. Other possibility is 28...Re1+ 29. Kf2 d2 30. Bxd2 Rxa1 31. Qxc4 Rb2 32. Ke2 Raxa2 33. Qd3 Rxd2+ 34. Qxd2 Rxd2+ 35. Kxd2 hxg5 and B has an extra piece ♘. Seems more clear. |
|
| Jan-23-25 | | Allderdice83: I'm happy to say I saw all the way through 32 ... Re8, rejecting 29 ... Re8 which still looks good for Black when I saw 29 ... Rf1+!. But unfortunately, I didn't see 33. Qf1 and couldn't figure out how to win, I guess, because it's nothing spectacular. Black just builds up on the g2 pawn. But 36 ... Qe4! is a neat move to set up the discovered check. Once I played through up to 33. Qf1, I had 33 ... Qd6 threatening both 34 ... Qc5+ and 34 ... Qxh2. Black should be winning after 34. Kg1 Qc5+ 35. Kh1 Qxc3 36. Bb2 (36 ... Re1 was threatened) Qxb2 37. Rb1 Qxa2 or 37. Re1 Rxe1 38. Qxe1 hxg5. |
|
Jan-23-25
 | | scormus: Quite a tricky sequence. I spent quite a while looking for a tactic to force a clear win, but when I found it I wasn't sure it was winning. I saw through to 32 ... B to play but didn't see the key move 32 ...Re8, putting the WK in prison. I was thinking 32 ... Qc2+, but that is only good enough for equality. |
|
Jan-23-25
 | | Teyss: Found the tactical sequence until move 32 but wasn't sure how strong Black's advantage was then so wasn't sure about the solution. Material is roughly equal but the WK is exposed and White's pieces are uncoordinated: once you see the game it seems obvious. My eternal issue: correctly assessing the position. Sigh. |
|
Jan-23-25
 | | chrisowen: If its warm tank its q its hey c joel u Re1+ ie its huh its adagio its nug de rigueur Re1+ do x |
|
| Jan-23-25 | | TheaN: Oops, Thursday mess up. My former self is ashamed: R Martin del Campo vs Hjartarson, 1990. This time I over-analyzed <28....Re1+ 29.Kf2 (Qf1 Rxf1+ 29.Kxf1 d2+ -+)> and went with <29....d2?<>> right away. Somehow I discarded 30.Bxd2 (else disaster) Rxa1 31.Qxc4 =... lateral defense etc. Weird because in other variations I did spot Qxc4, but in this combination White neutralizes the main threat and the ♕:2♖ is defendable. Former self had it completely right, instead switcheroo: <29....Rf1+! 30.Kxf1 d2+ 31.Qxc4 d1Q+> and surprisingly, the only thing Black did was regain his queen, but after <32.Kf2 Re8 -+> the White pieces are grossly uncoordinated. Great combination, honestly, forgot about it entirely over the last 15 years. |
|
Jan-23-25
| | chrisowen: Campfire draw its nearer |
|
 |
|
|
< Earlier Kibitzing · PAGE 4 OF 4 ·
Later Kibitzing> |
Kibitzing
sac: 25...Qxe4