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| Jun-08-05 | | schnarre: Nice! |
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Nov-14-09
 | | tpstar: 1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5 <French Tarrasch, Open System> 5. Ngf3 <5. Bb5+ Nc6 6. Ngf3 transposes to the game; 5 ... Bd7 6. Qe2+> Nc6 6. Bb5 Nf6 <6 ... Bd6 is also common> 7. 0-0 Be7 <7 ... Be6 8. Re1 Bd6 9. dxc5 Bxc5 10. Nb3 Qb6 Euwe vs R Broadbent, 1948 ; 7 ... c4 8. b3 cxb3 9. Ne5 Qb6 10. Qe2 Keres vs A Dueckstein, 1968; 8. dxc5 0-0 9. Nb3 <MBW = Make Black Work to regain the Pc5; this line scores well for White Opening Explorer > Ne4 <9 ... a5 10. a4 Ne4 11. Be3 Bg4 12. Be2 U Lauk vs T Tanav, 2001 > 10. Be3 Bg4 11. Bxc6 bxc6 12. Qd3 <White allows doubled Pawns but frees the Queen from the pin> Bxf3 13. gxf3 Ng5 14. f4 Qd7 15. f3 <15. fxg5 Qg4+ draws by perpetual check; the text prevents ... Qg4+> Ne6 16. Kh1 <<[16. f5 Nc7  ]>> f5 17. Rg1 a5 18. a4 Bf6 19. Rad1 Rab8 <19 ... Bxb2?! 20. c3 traps the Bishop> 20. Nxa5 Rxb2 21. Nb3 <Blocking the Rook's exit> Qe8 22. Bc1 Ra2 23. Rde1 Bh4 <23 ... Rxa4?! 24. Qxf5 wins the Knight> 24. Re2 Rxa4 25. Qe3 Kf7 <Consider 25 ... Nc7> 26. Bb2 <<[26. c4 dxc4 27. Nd4 Nxd4 28. Qxd4 Bf6 ]>> Rg8 <<[26 ... g6!? 27. Qc3 Qd8 28. Rxe6 Kxe6 29. Qe5+ Kd7 30. Qd6+ Ke8 31. Qe6+ Be7  ]>> 27. Qe5 Bf6?? <<[27 ... g6 28. Rge1 Ra2 ]>> 28. Rxg7+!! Bxg7 <28 ... Kxg7/Nxg7 29. Qxf6#; 28 ... Rxg7 29. Qxf6+ Kg8 30. Rxe6> 29. Qxf5+ Ke7 30. Rxe6+ <<[30. Qxe6+ seems even better Kd8 31. Bf6+  ]>> Kd8 31. Rxe8+ <<[31. Bf6+ Bxf6 32. Qxf6+ Kc7 33. Rxe8 Rxe8 34. Qd6+ Kc8 35. Qxc6+ ]>> 1-0.<<[Fritz 7]>> |
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| Apr-23-11 | | schachspieler1981: a very nice game indeed - and a good mid-week puzzle on move 28 |
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May-08-14
 | | Phony Benoni: The pawn on g7 was far too important to be protected only four times. Black needed a pawn on f8 or h8 to have a chance of surviving. |
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| May-08-14 | | Patriot: 28.Rxg7+
28...Nxg7/Kxg7 29.Qxf6#
28...Bxg7 29.Qxf5+ Bf6 30.Qxf6#
28...Rxg7 29.Qxf6+ Kg8 30.Rxe6 |
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| May-08-14 | | Mating Net: Nice puzzle, great attack.<Phony Benoni><Black needed a pawn on f8 or h8 to have a chance of surviving.> Now that would be something to see! The porcupine defense? |
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| May-08-14 | | ThumbTack: 28.Rxg7+ looks absurd until you realize that no matter how Black takes it, he is either mated or losing his Queen. A pretty combination. |
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| May-08-14 | | Cheapo by the Dozen: The obvious try is Rxg7+ to undefend the bishop, followed by Qf6+. Capture is forced, so there are three lines depending on capturing piece. The worst is: 28 Rxg7+ Nxg7
29 Qxf6#
Also losing quickly is:
28 Rxg7+ Rxg7
29 Qxf6+ Kg8
30 Rxe6 (Q moves)
31 Re8+ Qxe8
32 Qxg7#
So in this line Black really plays 30 ... Qxe6, with ruinous material loss. Black's third try leaves him down similarly in material after: 28 Rxg7+ Bxg7
29 Qxf5+ Ke7
30 Rxe6+ Kd7/Kd8
31 Rxe8+ Kxe8
32 Bxg7
since 32 ... Rxg7 allows the fork with 33 Qf6+.
Unless I'm missing something, all lines end with Black either mated, or else down about 2 pieces. (More precisely, 2 pieces, queen and some pawns for 2 rooks.) |
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| May-08-14 | | agb2002: The material is identical.
Black threatens 28... Bxe5, 28... Bxb2 if the white queen moves, 28... N(R)xf4. The pawn on g7 protects the black bishop. Hence, 28.Rxg7+: A) 28... Kxg7 29.Qxf6#.
B) 28... Kf8 29.Qxf6+ Qf7 30.Qxf7#.
C) 28... Rxg7 29.Qxf6+ Kg8 30.Rxe6 Qf8 (30... Qf(d)7 31.Re8+ and mate next) 31.Re8 wins. D) 28... Bxg7 29.Qxf5+ Ke7 (29... Bf6 30.Qxf6#) 30.Rxe6+ wins decisive material. E) 28... Nxg7 29.Qxf6#. |
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| May-08-14 | | Once: The puzzle itself is pretty easy (as long as we don't get side-tracked into a discussion of mating patterns!). So what happens if we rewind the position to see where black went wrong? This is the position after white plays 27. Qe3-e5
click for larger viewWhite is threatening 28. Qxf5+ and if 28...Bf6 29. Rge1. Which I guess is why black tried 27...Bf6 possibly hoping for 28. Qxf5 Rxf4. But as we have seen 27...Bf6 loses to 28. Rxg7. So why can't black simply play 27...g6? 
click for larger viewAnd now in human mode I flip-flopped between - "oh no he can't" and "oh yes he can". At first I thought that white wins from here with 28. Rge1 with unbearable pressure on the pinned Ne6. But then I noticed the black bishop sitting on h4. Surely 28. Rge1 loses to 28...Bxe1? No, 28...Bxe1 loses to 29. Qf6# and one of those thingummy mates. So maybe 28. Rge1 is playable after all. But black wriggles to freedom (ish)with 28. Rge1 Qd7 (or Qc8) 29. Qxe6 Qxe6 30. Rxe6 Bxe1 31. Rxe1 
click for larger viewA lot of the tension has been resolved through mass exchanges. Black has rook for bishop and knight, but has better prawns. Fritzie says a white advantage of half a prawn, which looks about right. So, yes, it looks as if black should have played 27...g6. The point is that the Bh4 defends f6 as long as it isn't sitting on f6. |
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May-08-14
 | | An Englishman: Good Evening: 27.Qe5 is a beautiful trap, esp. if Black had been suffering from time pressure. The swallowtail mating patterns after 27...Kxg7 or 27...Nxg7 (28.Qxf6X in either line) look very attractive. |
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| May-08-14 | | stacase: 28 Rxg7 and the rest of the moves until Black throws in the towel are obvious. |
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| May-08-14 | | patzer2: My Wednesday puzzle try was 28. Qd6!?, missing the much stronger 28. Rxg7! Levinfish had planned with the trap set by 27. Qe5!! as noted by <Englishman>. After 28. Qd6!? Bxb2 29. Rge1 (position below),
click for larger viewFritz 12 indicates Black must find 28. Re4! = to keep the balance, as White obtains a strong advantage with other tries. |
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| May-08-14 | | gofer: Pg7 is worth his weight in gold, so if we can remove
him without losing tempo then black's in trouble!
<28 Rxg7+ ...>
28 ... Nxg7/Kxg7
29 Qxf6#
28 ... Rxg7
29 Qxf6+ Kg8
30 Rxe6 mating
<28 ... Bxg7>
<29 Qxf5+ Ke7+> (Bf6 30 Qxf6#) <30 Qxe6+! Kd8> (Kf8 31 Qxe8#) <31 Bf6+! Bxf6> (Kc7 32 Qd6+ ) <32 Qxf6+ ...>
32 ... Kc8
33 Rxe8+ Rxe8
34 Qxc6+ winning easily
32 ... Kd7
33 Qd6+ Kc8
34 Rxe8+
<32 ... Kc7>
<33 Qd6+ Kb7> (Kc8 34 Rxe8+ Rxe8 35 Qxc6+ winning easily)
<34 Rxe8 >
click for larger viewBlack has no attack and no defense. Time to resign!
~~~
Hmmm, I looked at <30 Rxe8> but felt Qxe6+ was more forcing... |
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| May-08-14 | | morfishine: <28.Rxg7+> Bxg7 29.Qxf5+ Ke7 30.Rxe6+ Kd7 (or 30...Kd8)
31.Rxe8+ Kxe8 32.Qxh7
(1) 28...Nxg7 29.Qxf6#
(2) 28...Rxg7 29.Qxf6+ Kg8 30.Rxe6 Qf8 31.Re8
***** |
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| May-08-14 | | TheBish: Levenfish vs M Yudovich Sr., 1933 White to play (28.?) "Medium".
Material is even, but White has two sets of doubled pawns (which turns out to be irrelevant). White has a nice battery of queen and bishop aimed toward the enemy king, but unfortunately, Black has a skewer with his own bishop (if 28. Qe3 Bxb2). I didn't look at it until now, but one way to get out of this predicament would be 28. Qxf5 (pinning the bishop) which leads to interesting complications after 28...Rxf4 29. Qxh7 (29. Qxf4 Nxf4 30. Rxe8 Rxe8 31. Bxf6 Kxf6 is better for Black) Bxb2 30. Qg6+ Kf8 31. Qxe6 Qxe6 32. Rxe6 Rf6 (doing this in my head, but check your favorite engine for a silicon evaluation) -- which is interesting but far from winning or easy, which the solution is both of (in my opinion). The reason I found it right away (under a minute) was because I was focused on the queen/bishop battery and the fact that the g7 pawn was causing White major problems, rendering the battery useless! So it's natural to look at eliminating that obstacle, and we have a powerful way of doing so! 28. Rxg7+!! (even if you think this only merits one exclam, I'm giving an extra for its devastating effect). Now Black has several ways to lose (and four ways to capture the rook), some ending in mate and others just losing overwhelming material. (A) 28...Kxg7 29. Qxf6# is an dovetail mate.
(B) 28...Nxg7 29. Qxf6# is a swallow's tail mate (see http://en.wikipedia.org/wiki/Checkm... for explanation of mating patterns). (C) 28...Rxg7 29. Qxf6+ Kg8 30. Rxe6 Qf8 31. Re8! with mate to follow either on g7, f8 or h8 (e.g. 31...Rf7 32. Qh8#). (D) 28...Bxg8 29. Qxf5+ Ke7 (29...Bf6 30. Qxf6# is similar to variation B) 30. Rxe6+ Kd8 31. Rxe8+ Kxe8 32. Qe6+ Kf8 33. Bf6! is crushing (33...Ra7 34. Qd6+) - but even quicker is 30. Qxe6+ Kd8 31. Bf6+!. (E) 28...Kf8 (the only non-capture and least likely to be played but it covers all the bases) 29. Qxf6+ Qf7 30. Qxf7#. One thing solving tactics puzzles has taught me is to consider crazy-looking moves, because often they turn out to be not so crazy! |
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| May-08-14 | | PhilFeeley: For once I got a Thursday puzzle. I figured it had to be a queen move, but then I saw the possibilities of Rxg7 and liked that better. |
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| May-08-14 | | TheBish: Of course, variation (D) in my note above should start 28...Bxg7 (not g8). I rushed my proofreading because my battery was dying! |
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May-08-14
 | | perfidious: Trying to create a bishop which moves on both colours, are ya? Nice idea, but will the powers that be let ya git away with it? |
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| May-08-14 | | Conrad93: <But as we have seen 27...Bf6 loses to 28. Rxg7. So why can't black simply play 27...g6?> 28. Rg5! and it's game over. |
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May-08-14
 | | LIFE Master AJ: 28.RxP/g7+, and its close to time for Black to resign. |
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| May-08-14 | | Once: <Conrad93: 28. Rg5! and it's game over.> 27...g6 28. Rg5
click for larger viewIt's a nice interference move with the intention of Qf6#, but unfortunately it's just a bit too slow. Fritzie reckons that black gets an advantage with 28...Qe7 or 28...Bxg5 29. fxg5 Qe7 or 28...d4. |
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| May-08-14 | | Vermit: Black got his revenge next year in the game: M Yudovich Sr. vs Levenfish, 1934 A nice game also exploiting the weakness of black squares around the opponent's king. Strange to have the same theme occurring. |
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| May-08-14 | | Chess Dad: First I tried this line, but it didn't seem to be decisive. 28. Qxf5 Rxf4
29. Qh5+
Then I thought perhaps Qc7+ might lead somewhere, but it doesn't seem to lead anywhere after Nxc7.
Rxe8 is available, but then Nxe8 leaves no good choices. I'll go back to Qxf5, and then if I'm right, I'll see what black plays in response to decide my next move. .....
Ok, I see it now. I was on the right track with f5, but I needed to eliminate the defender first to make it more decisive. Good puzzle. |
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May-08-14
 | | paulalbert: I found this one relatively easy for Thursday. Strange how you sometimes spot the key idea immediately and sometimes go off on wild goose chases before finding the solution! |
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sac: 28.Rxg7+