|
< Earlier Kibitzing · PAGE 1 OF 3 ·
Later Kibitzing> |
| May-03-06 | | Danpev: Nice puzzle!! Unfortunately I didn't get it. Checkmate in one move!! |
|
| May-03-06 | | chessmoron: YAY! Unzicker's tribute day continues.
Nice sac and a big blunder by Stein. Could have move king to (a6). |
|
May-03-06
 | | WannaBe: Must be Wolfgang Unzicker week. =) |
|
| May-03-06 | | tacite: And what about 55...bxc4? |
|
| May-03-06 | | Calli: <WannaBe> Its a tribute. He passed away recently. |
|
May-03-06
| | WannaBe: <tacite> almost the same thing... 56. Qd6+ Ka5 (only square) 57. Ra7 |
|
May-03-06
| | WannaBe: <Calli> Aye, I know. |
|
| May-03-06 | | RandomVisitor: 55.Nxc4+ Ka6 56.Rc7 and Black is history
55.Nxc4 bxc4 56.Qd6+ and mate follows |
|
| May-03-06 | | Ger7ry: Well, I must be dense. What if 55. Nxc4, bxc4 56. Qd6+, Kb5? |
|
May-03-06
 | | al wazir: 56...Ka5 57. Ra7+; 56...Qc6 57. Qb8+ Ka5/Ka6 58. Ra7+; 56...Bc6 57. Qc5+ Ka5/Ka6 58. Ra7+. |
|
| May-03-06 | | Confuse: pretty ending, i imagined the knight checking in the spot where the queen and bishop defend. i guess that wouldnt have worked out as nicely as this one though. |
|
May-03-06
| | WannaBe: <Ger7ry> You are not dense. I was wrong, it's not the only square (teach me to try to do it in my head again...) 57. Ra7 Rh4 56. Qb4+ Kc6 57. Qc5# (via Shredder 9) |
|
| May-03-06 | | pastpawn: A nice finish. I don't really understand the point of 32 ... a4 . After that, Black lost all chance of Q-side counterplay, and looked strategically busted. |
|
| May-03-06 | | Ashram64: knight clearance sacrifice is necessary for the queen to get some mattress mambo action with the enemy king. However i was considering Nd7+, but with a few calculation, that led to no where..b/c if black didnt take the knight, the white rook would only watch the king to run away helplessly. Therefore Nxc4+ is the only alternative that still serve the same purpose. |
|
May-03-06
| | WannaBe: <Ashram64> You know, you're not allowed to use my name in your profile. I'll have to sue you for copyright infringement now. =) LOL... (I'm just kidding.) |
|
| May-03-06 | | TrueBlue: didn't get it :( I mean, of course I tried it, but coudn't see what to do after Ka6. Although I worked out most replys to Ng6. Does this count? |
|
| May-03-06 | | chessmoron: Nevermind Ka6, thx <RandomVisitor>, I see what i did wrong |
|
| May-03-06 | | InitiativeCheck: 56. ...Qc6 57. Qb8+ |
|
| May-03-06 | | patzer2: To fully understand today's puzzle solution(s) 55. Nxc4+! or 55. Qg5!, one needs to go back to the level position after 54. Rg7 = (diagram below).
click for larger view[Black to move (54...?)]
Black needs to control the d6 and g5 squares to contest any attempt to occupy them by the White Queen -- for reasons that will become obvious in analyzing White's winning moves. The bottom line is that 54...Qd8= holds, while 54...Qc8? loses immediately. Note that 55. Nd7+?? Bxd7 56. Qd6+ Qc6  backfires and gives Black the advantage. The clearance move 55. Nxc4+!, as played, wins after 55... dxc4 (55... bxc4 56. Qd6+!, when White has a mating attack after occupying the now unprotedted and critical d6 square. Play could have continued 56...Kb5 57. Ra7! Rh1 58. Qb4+ Kc6 59. Qc5#) 56. Qd6+
Bc6 57. Qc5+ Ka5 58. Ra7+ Qa6 59. Rgg7+ Ra8 60. Rgb7 Qxa7 61. Rxa7+ Rxa7 62. Qxa7#. However, Black's position after 54...Qc8 is so weak (especially on the dark squares) White can also win by simple coordination and connection of the Queen and Rook after 55. Qg5! Qb8 56. Qe7! R3h6 57. R1g6 Rxg6 (57... Bxg6? 58. Nd7+  ) 58. Rxg6 Qc7 (58... Bxg6 $2 59. Nd7+ ) 59. Qxe6+ Kb7 60. Qa6+ Kb8 61. Rb6+ Qxb6 62. Qxb6+ Ka8 63. Qf6
(Fritz 8, +9.66 @ 13 depth).
In one sense the 55. Qg5! solution's simple strategy is to first dominate the g-file and then the 7th rank after 56. Qe7!, and then to deflect a defending Bishop or Rook after 57. R1g6! |
|
| May-03-06 | | mig55: White wins also easily with Qg5 after Black's Qc8.... |
|
| May-03-06 | | prinsallan: Got it! |
|
| May-03-06 | | mig55: Indeed after blacks Qd8 in stead of C8 nothingb is clear...Great blunder from Stein. |
|
| May-03-06 | | durnstein: Great analysis, patzer2. |
|
| May-03-06 | | jahhaj: <patzer2> I don't think 54...Qd8 holds, blacks dark square and e6 weaknesses are too much. The following plan looks good 1) Clear the h2-b8 diagonal
55.Nd7+ Kc6 (else 56.Qd6) 56.Nb8+ Kb6
2) Tie black to defense of e6
57.Re1 R8h6 (57..R3h6 doesn't make much difference) 58.Nd7+ Kc6 59.Nc5+ Qd6 (59...Qc8 fails becuse Black's queen must also defend c7) 3) Invade on the dark squares
60.Qg5 followed by 61.Qe7 and Black is losing his e pawn and the game. |
|
| May-03-06 | | EmperorAtahualpa: Gotcha! :) Nice puzzle, about right for Wednesday in my humble opinion. |
|
 |
|
|
< Earlier Kibitzing · PAGE 1 OF 3 ·
Later Kibitzing> |
Kibitzing
sac: 55.Nxc4+