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| Apr-06-06 | | yataturk: Birinci... hehe
Took me 4 seconds to see 2 seconds to verify.. |
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| Apr-06-06 | | yataturk: Lets see if this sounds more intelligent..
A forced rook queen exchange combo that allows the d pawn to queen.. |
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| Apr-06-06 | | yataturk: The reason why this is a nice puzzle is b/c black has a mate threat coming.. |
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| Apr-06-06 | | pwrstick: I actually spotted this fairly quickly too (for my skill level), but I'm not sure what to do here now. Though I can't feel too uncomfortable having scored a rook and having a queen and up a rook to boot. |
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| Apr-06-06 | | pwrstick: Forget that "up a rook part" ... derrrr |
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| Apr-06-06 | | makaveli52: er I was a bit confused as I didnt notice the mate threat, or the already existent material advantage |
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| Apr-06-06 | | The17thPawn: Thursday owns me yet again! Arghhhhhhhh!!!!
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| Apr-06-06 | | Cogano: Not only did I not get this, I don't understand why Black resigned. Would someone please forgive my ignorance & explain to me how White is winning now? Just the move before he had a Queen & a pawn threatening to Queen. He sacked his Queen & queened the pawn. So now, once again he has a Queen to check with. But how are things different now that the position is so much worse for Black? I don't get this at all! Thanks much in advance. :) |
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| Apr-06-06 | | zev22407: To Cogano-now white have Q-d4 check and the N on e3 is protected,black has no mate starting with B:e3+ |
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| Apr-06-06 | | Ashram64: I actually see the weaker move 35. d8=Q? that will lead to Bxe3 and 36. Qxe3 Rg2+!
37. Kh1 Rxb2+ 38. Kg1 Rg2+... the game will be drawn by repetition. The actual move is much stronger..didnt look hard enough for white.. and fell for black's see-saw trap |
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Apr-06-06
 | | ajk68: <Cogano> Black threatens perpetual check after 38 ...Bxe3 39. Qxe3 Rg2! The exchange of the queen and pawn for the rook allows the white king a flight square. He then has a superior endgame. Move 40. Qxf8 also forces the bishop off the attack of the knight and allows for the knight to escape. |
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Apr-06-06
 | | An Englishman: Good Evening: At the risk of sounding appallingly arrogant, and keeping in mind that I'm playing without a board--but, well, I think I can improve on Tolush's play. Consider 36.Ne3-f5!?
36...Rg2+; 37.Kf1,Rxf5+; 38.Qxf5,gxf5; 39.d8/Q+
36...Rxe6; 37.Nxh6,Rd8; 38.Nf7+,Kg8 or Kg7; 39.Nxd8,Rb6; 40.Nxb7,Rxb7; 41.d8/Q again. Best for Black might be 36...Rxe6; 37.Nxh6,Re2; 38.Nf7+,Kg7 (...Kg8? runs into the pin d8/Q). I'm playing without a board, can White play 39.d8/Q,Rg2+; 40.Kf1,Rxf7+; 41.Ke1 and escape the perpetual? No, wait! I think White wins in this line with 39.d8/N!, protecting the Nf7, and remaining a piece and two passed pawns to the good! Is any of this correct?! Someone please help this tired old patzer! |
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| Apr-06-06 | | Hafen Slawkenbergius: It's even simpler than zev22407 wrote; after 40.Qd4+, Bg7 is forced, since Kg8 drops the rook to 41.Qc4+ |
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Apr-06-06
 | | al wazir: The finish is 40. Qxf8+ Bxf8 41. Rd8 Kg8 (41...Kg7 42. Rd7+) 42. Rf1. My move was 38. Rd5. If 38...Bxd5 then 39. Qxd5 Bxe3+ 40. Kh1, with the threat 41. d8=Q. If black now plays 40...Rd8 then 41. Qe5+ Kg8 42. Qe8+. If 38...Bxe3+ then 39. Qxe3 Rxe3 (39...Bxd5 Qxe2) 40. d8=Q Rxd8 (40...Bxd5 41. Qxd5) 41. Rxe8+ Kg7 42. Re7+ K moves 43. Rxb7 Unless someone finds a problem with this, I think it works as well as what Tolush played. |
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Apr-06-06
| | An Englishman: Good Evening: <al wazir>, in your line, what happens after 38.Rd5,Rxe3; 39.d8/Q!?,Rxe6? |
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| Apr-06-06 | | Simplification: I saw 38 Qf6+. However, I preferred 38 d8=N, an underpromotion solution (even though this isn't weeks theme). The knight threatens to take the Bishop, preventing the perpetual, whilst increasing the material advantage. After 38 ... Bxe3 39 Qxe3 Rxe3 40 Nxb7 white is a piece up. |
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| Apr-06-06 | | durnstein: Note that d8=Q leads to a draw by perpetual only if Black does Exactly the right thing with the Rook on g2. Wrong line:
38 d8=Q Bxe3+
39 Qxe3 Rg2+
40 Kh1 Rxb2+(?)
41 Rd5! Bxd5+
42 Q(d8)xd5 and Black has no perpetual, and is lost.
Correct:
40 Kh1 Rd2! (preventing Rd5 by White)
and now the perpetual by sliding the rook back and forth from d2 to g2 cannot be avoided. |
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| Apr-06-06 | | zerok: <An Englishman> White can also win but the things turned out to be complicated when I tried this on a computer. Here is pgn file:
[Event "Ch URS"]
[Site "Ch URS"]
[Date "1950.??.??"]
[Round "?"]
[White "Tolush Alexander"]
[Black "Mikenas Vladas"]
[TimeControl "-"]
[Result "1-0"]
[ECO "D70"]
[WhiteELO "?"]
[BlackELO "?"]
1.d4 d5 2.Nf3 Nf6 3.c4 g6 4.cxd5 Nxd5 5.e4 Nf6 6.Nc3 Bg7 7.h3 O-O 8.Bc4 c6 9.a4 a5 10.O-O Na6 11.Be3 Nb4 12.Qb3 Ne8 13.Rfd1 Nd6
14.Bf1 Kh8 15.d5 e5 16.Bc5 b6 17.Bxb4 axb4 18.Qxb4 c5 19.Qb3 f5 20.Nd2 Bh6 21.Nc4 Nxe4 22.Qxb6 Qh4 23.Nxe4 fxe4 24.g3 Qe7 25.d6
Qf7 26.Qxc5 e3 27.f3 Qxf3 28.Qxe5+ Kg8 29.Bg2 Qf2+ 30.Kh1 Qxg2+ 31.Kxg2 Bb7+ 32.Kg1 Rf2 33.Nxe3 Re2 34.Qe6+ Kh8 35.d7 Rf8 36.Nf5
( 36.Qe5+ Kg8 37.Qe6+ Kh8 38.Qf6+ Rxf6 39.d8=Q+ Rf8 ) 36...Rxe6 37.d8=Q gxf5 38.Qc7 Be4 39.Rd8 Kg8 40.Rad1 Rg6 41.Rxf8+ Bxf8
42.Rd8 Rf6 43.Qc4+ Kg7 44.Rd7+ Kh6 45.Qg8 f4 46.g4 f3 47.g5+ Kh5 48.gxf6 Bc5+ 49.Kh2 f2 50.Qg4+ Kh6 51.h4 Be3 52.Qxe4 f1=N+
53.Kh3 Kh5 54.Rxh7+ Bh6 55.Qg4# 1-0
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Apr-06-06
| | al wazir: <An Englishman: in your line, what happens after 38.Rd5,Rxe3> Hmmmm. Well, there's always 39. Qf6+, Tolush's line (minus a ♘). But I think 39. Qd6 wins. If 39...Bxd5 then 40. Qxd5. If 39...Rd2 then 40. Qxf8+ Bxf8 41. d8=Q. If 39...Rd8 then 40. Re5. I have to admit that it's not as clear as I thought. |
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Apr-06-06
| | OBIT: The underpromotion suggested by <Simplification> seems like the simplest win. After 38 d8=N Bxe3 39 Qxe3 Rxe3 40 Nxb7, White trades off the Black bishops while keeping an extra piece. He then wins easily by pushing the a-pawn and b-pawn. |
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| Apr-06-06 | | Marco65: For some reason I don't remember any more, I rejected 36.Qf6+ and analyzed 36.d8=Q coming to the same line as <durnstein>. Then I found 36.d8=N Bxe3+ [Ba8 37.Nf7+ Kg7 38.Nxh6 removes the threat] 37.Qxe3 Rxe3 38.Nxb7 and I felt brilliant, but now I see that after 38...Rxg3+ 39.Kh2 Rff3 White can't avoid perpetual check! The depth I analyze is never enough! |
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| Apr-06-06 | | Marco65: Oh, I see only now other people posted 36.d8=N and missed the perpetual as I did... |
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| Apr-06-06 | | alfilbueno: My solution was also 38. d8=♘. I thought 38 d8=♘ ♗xe3+ 39 ♕xe3 ♖g2+ 41 ♔h1 ♖xg3+ 42 ♘xb7 ♖xe3 43 ♖d8, and after the exchange of one pair of rooks, white wins easily. When I have seen Tolush's solution, I began to look for a possible "hole" in the d8=♘ line, and I think now that there is a big one, d8=♘ leads to a draw! 38 d8=♘ ♗xe3 39 ♕xe3 There is no continuous and white is "only" a piece, not a queeen, up. Then, it is not compulsory to move the rook to g2, Black can try
39 ... ♖xe3! 40 ♘xb7 ♖xg3+ 41 ♔h2 (or ♔h1) ♖ff3! and another continuous check arises, ♖g3-♖h3, which cannot be avoided. 
click for larger view |
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| Apr-06-06 | | mr j: I am really enjoying the theme of this weeks puzzles! (sacrificial deflections of sorts ??) Bring on Friday, I am on a role :-)
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| Apr-06-06 | | alfilbueno: <Marco65> I only saw your line after posting mine... We have found the same problem... Chess is such a a complicated game! |
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