| Sep-16-16 | | diagonalley: 31.NxP+ is obvious and leads to a winning advantage... ok, it still needs some play if black doesn't quit, but OTB most would not even hesitate to pursue the line... |
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| Sep-16-16 | | dfcx: Black queen is cornered.
White wins with
31.Nxe6+ (clears the file for rook) fxe6
32.Bc6 Rb7
33.a6 wins the rook back.
click for larger viewI was also thinking of
32 Rc7 Rb7 33.Bc6+ Rxc7 34.Bxa8
click for larger view
But this is inferior to the game line. |
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| Sep-16-16 | | patzer2: <diagonally> is right. Today's Friday solution 31. Nxe6+ fxe6 32. Bc6 Rb7 33. a6  (+8.85 @ 20 depth, Deep Fritz 15) is fairly obvious.The decisive mistake on Black's part was 30...Kg7? which allows 30. Nxe6+ . Instead, 30...Kh8 31. a6 Rg8 = (-0.24 @ 22 depth, Deep Fritz 15) avoids the white Knight check and keeps it level. |
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| Sep-16-16 | | YouRang: Friday 31.?
click for larger view
To me, this was a bit easier than yesterday's puzzle, thanks to black's oddly cornered queen. My first fleeting thought was to attack the black Q with 31.Bc6, and after 31...Qxc6 I have the discovered check 32.Nxe6+. This was only "fleeting" because it obviously fails to 32...Qxe6. But that bad idea was a springboard for a better one: First play <31.Ne6+ fxe5>, and then <32.Bc6!>
click for larger view
Black's sad effort to save the queen is to put his rook in a pin where it can be poked by a pawn: <32...Rb7 33.a6>
click for larger view
After axb7, white is up a bishop with a far-advanced passed pawn. Pretty much game-over. ~~~~~
Moments later, black made a bid for a swindle after <34...Qxf4>
click for larger view
Black is still guarding the promotion square b8, and is hoping that white will play 35.Rcb1? with intent to push the b-pawn. If so, then 35...Qf3+! draws because white will be unable to escape check. However, white alertly played <35.Rb2>, which one of the two moves that win. The other, 35.Rg1 seems slightly better since the a-rook remains guarded after 35...Qxd4. With that, black ran out of tricks and finally gave it up a couple moves later. |
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| Sep-16-16 | | Aunt Jemima: Yaaaaaay! I got it. I got Monday's and Tuesdays, but missed Wednesday's puzzle. Now I got this one so I don't feel so bad anymore. |
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Sep-16-16
 | | al wazir: Easier than yesterday's. |
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Sep-16-16
 | | drollere: a few tactical possibilities came to the fore. in particular, i'd really like to munge up black's central pawns. simplest was
31. Nxe6+ fxe6
32. Bc6 Rb7
33. Bxb7 Qxb7
and white has two R's to the Q, has punched a hole in black's central pawn fence, and opened a 7th rank attack on the black K. however 2 R's against a free roaming Q is a gamble, especially when your king is exposed. ha! i missed a6 in my analysis although by move 32 was obviously the kick in the groin to capture the R outright. even so, the subsequent checks are hazardous, and nicely handled. |
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Sep-16-16
 | | agb2002: White has a rook, a bishop and a knight for the queen and two pawns. The black queen lacks mobility. This suggests 31.Nxe6+ to be able to play Bc6 with tempo: A) 31... fxe6 32.Bc6 (32.Rc7 is probably winning but slower in any case) 32... Rb7 33.a6 followed by axb7 or Bxa8 winning decisive material in any case. For example, 33... Qb8 34.axb7 Qxf4 35.Rc2 Qe4+ 36.Rg2 Qxd4 37.Rb1 followed by b8=Q wins. B) 31... Kf6 32.Bc6 as in A. |
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| Sep-16-16 | | patzer2: An interesting possible improvement for
Black after 16. Nb3 (diagram below)
click for larger viewis 16...c4  to  . The play is complicated, but slightly favors Black after 16... c4 17. Nc5 Qc6 18. Bc2 bxc3 19. bxc3 Bxe5 20. e4 Bxf4 21. Bxf4 Rb2 22. exd5 Qxd5+ 23. Be4 Qh5 24. Na4 Rb5 25. Bf3 Qf5 26. Bc6 Ra5 27. Nc5 Ra3 28. Bg3 Rxa2 29. Rae1 Qc8 30. Bd5 Qd8 (-0.51 @ 20 depth, Deep Fritz 15). |
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| Sep-16-16 | | et1: a6 is one of those moves ! precious ! |
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| Sep-16-16 | | gofer: I saw the first six moves, but didn't see Qxf4 looking for the swindle. If you got that far then I think you can pat yourself on the back... ...I would have had to sit and think for a while after realising that my smug grin was a little early! |
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| Sep-16-16 | | Moszkowski012273: Friday??? |
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| Sep-16-16 | | hashtag: FridayDifficult |
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| Sep-16-16 | | Viennablue: Is 10.g4 an established initiation move for the follow-up Q sac or rather a blunder which forced white to sac his Q (sucessfully, nevertheless)? |
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| Sep-16-16 | | Cheapo by the Dozen: I agree with the previous sentiments. This is Tuesday/Wednesday level. Honestly, since it was a Friday I rushed to check what I might be missing, so quickly that I didn't notice Rb1 was the wrong way to exploit the pin. Still, this was not a good puzzle. |
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| Sep-16-16 | | Rama: I kinda liked 31. a6 ..., threatening Nb7 and total imprisonment. |
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Sep-16-16
 | | thegoodanarchist: I hate to quibble about 1 day, but this seems like a straight Thursday puzzle. If it is borderline, I' say borderline towards the Wednesday side... |
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| Sep-16-16 | | mel gibson: 30...K-g7 was a blunder allowing a check from the white knight & a subsequent pin by the bishop. 30...h6 was the correct move &
shows a draw by DR4 64 bit. Depth 20.
Moral of the story -
always watch out for checks before before moving. |
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Sep-16-16
 | | gawain: The Black queen is in quite a pickle.
My thought process went much like <You Rang>'s--only I was less clear and did not go as deep. I always enjoy <You Rang>'s posts. |
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Sep-16-16
 | | PawnSac: a nice little wednesday puzzle...
Nxe6+! fxe Bc6 Rb7 a6 and bye bye rook AND if white captures with the pawn there is a dangerous passer = Q threat. Q has to block on b8, but after Rcb1 and Rxa7 its game over. Black may try some spite checks on the Kside but white can block and still support the push. |
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Sep-16-16
| | PawnSac: ah yes. after looking at the game, i c black did try the spite check. So after the final position, only move = ..Qb8 then Ra2 and black is done. |
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| Sep-16-16 | | patzer2: <Viennablue: Is 10.g4 an established initiation move for the follow-up Q sac or rather a blunder...> Looking at our chessgames.com opening explorer, it appears this game may have entered unexplored territory with 7. Qf3 = (-0.20 @ 21 depth, Deep Fritz 15). Another possibility is 7. Ngf3 = (0.00 @ 24 depth, komodo 9.3) as in White's win in F Parr vs R Broadbent, 1946. So it appears we were already in explored territory by the time White played 10. g4!? With best play, Black has the advantage after 10. g4!? Nxg5 11. Qxg4 ne5 (-0.55 @ 19 depth, Deep Fritz 15). Instead, the computers prefer 10. e4 Nxe4 11. Nxe4 = (0.00 @ 20 depth, Deep Fritz 15) with a level game. With 10. g4!?, it appears White was going for the win by creating an imbalance with a difficult, uncomfortable position for his human opponent. Obviously, he succeeded. |
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| Sep-17-16 | | Rama: I met Erich Marchand when I played at the Syracuse CC in the early 70s. Teenage Jonathan Tisdall, too. |
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Sep-17-16
 | | perfidious: Got to play both participants a while after this tilt, merely the latest such instance, come to a POTD. |
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| Sep-18-16 | | Viennablue: @patzer2: thank you! |
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Kibitzing
sac: 12.Qxc8+