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Later Kibitzing> |
Jan-29-12
 | | chrisowen: Lots of strange queen moves by white like 13.qe1 instead bd3 30.qe2 instead g5 31.qf3 maybe b4? Show an tell in must absolute conviction over qxc3 rxc3 rxc3 defend looks in c2 exchange down bishops pair for probing against out action h5 rookd1 level material castle rag in back seventh in draw slight plus forge black it often in extract or swindle underneath wave looked d6 e5 alike bridge. This pineapple goes down to whites queen placement it fallow in ground rich picking after f1? Shave ready made cull opening old c3 go enterprising but I got stuck to right draw-back queen in dilemma again try in amostly it over mini trate in woold e2 in fit hold concoct! |
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| Jan-29-12 | | CHESSTTCAMPS: <No really serious alternatives until this point> I should have considered the game line for full credit, but Benjamin's avoidance of the 2 bishop ending shows what he thought of his chances. I'd still like a test on Crafty EGT when it becomes available. |
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| Jan-29-12 | | David2009: J Benjamin vs Z Kozul, 1997 postscript <LoveThatJoker: <Everyone> I'm officially 7 for 7 this week, guys!> Congratulations - it gets better - are you 28 out of 28 this week on the <al wazir> scale?
<dzechiel:[snip] black will soon be all over white like a cheap suit>. Like it! |
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| Jan-29-12 | | LoveThatJoker: <David2009> I'm not sure how al wazir's scale works. I'm interested to know though! LTJ |
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| Jan-29-12 | | morfishine: <LIFE Master AJ> You commentd <...first puzzle I totally blew in a long, long time> I'm not sure what you mean. Improving on the actual play doesn't you missed it, unless I'm missing something. <33.Qe2> is a definite improvement over 33.Qf1; even <33.Qxc3> is better. I don't think you "blew it", but thats my opinion. |
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| Jan-29-12 | | Patriot: Now I know why I took 40 minutes on this. It's because of a quiescence error! With the rook guarding c3, I kept dismissing 31...Qxc3 early. Here's what Dan Heisman says about when to stop analyzing: "In general you should stop your analysis if:
- The sacrifice isn’t calculable and your judgment says the sacrifice is
worth it (or not),
- The reward becomes less than the risk, or
- There are no more checks, captures, and threats and you end up behind
in material."
I was using the second option to stop analyzing, since trading queen for rook is usually not a good idea! Maybe other's here have made that mistake, but eventually solved it because it's a puzzle? That's what happened in my case. |
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| Jan-29-12 | | Marmot PFL: best i found was 31...Qxc3 32 rxc3 rxc3 33 Qe2 (moving bishop loses to Rc1+) Rxc2 34 Qxc2 Rxc2 35 Kxc2 Bxe4+. 2B + 7p (including passed d-pawn) vs R, N, 5p. Probably take a lot of work to win, but I didn't see much else, and white is threatening 32 Nxf4 with advantage. |
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| Jan-29-12 | | James D Flynn: I didn't get this one. My best try was 31...Qb4 threatening to take the c3pawn with a R or the e4 pawn with the B, 32.c3xb4 Rxc2 33.Nxf4 to answer the mate threat on c1 33....Rb2+ 33 Ka1 Rc2 and white cannot stop the perpetual 34.R(d3)d2 prevents the mate in 3. However White doesn't have to the the Q immediately: 32.Nxf4 Rxc3 33.Rxc3 Rxc3 34 Nd3 Qd4 35.Ne1 and White remains a piece up. now to the game. |
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| Jan-29-12 | | James D Flynn: I dismissed the 33.....Qxc3 line because it leads to an exchange down endgane after 34.Rxc3 Rxc3 35.Qg2(or Qxe2) Rxc2 35.Qxc2 Rxc2 36.Kxc2 Bxe4+ 37.Kc3 I judged this as a tricky ending but maybe winnable for White. looking at the moves for Black if 37.....Be3 38.Ng3 Bf3 loses to Nf5+ 37....Bd4+ 38.Rxd4 e5xd4 39.Kxd4 and White has the active K and can create a passed P on on the queenside. I agree it is tricky, but I see only loosing chances for Black. _ |
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| Jan-29-12 | | cimatar: I think the critical move is on move 33 when Qf1 loses, but 33.Qd3 somehow holds the game i.e. 33...Rxc2 is now met by Qxd6 with mate the next move so 33...Rxd3 34.Bxd3 etc... is still a long game. |
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| Jan-30-12 | | TheBish: J Benjamin vs Z Kozul, 1997 Black to play (31...?) "Insane", even material.
This one truly earns it's difficulty level. After briefly looking at 31...Qxc3 (which I prematurely dismissed for some reason), I spent too much time looking at moves like 31...d5 and 31...Qb4 (which draws after 32. cxb4 Rxc2 33. Nxf4 Rb2+ 34. Ka1 Rcc2 35. R3d2 Rxa2+ 36. Kb1 Rab2+). After nearly giving up, I returned again to the former try, and noticed what I missed before. 31...Qxc3!! 32. Rxc3 (forced) Rxc3 33. Qe2
Or 33. Qxc3 Rxc3 34. Nxf4 exf4 35. Re1 Rg3, with a winning endgame advantage. Also, 33. Qf2 Rxc2! transposes, but not 33...Bxe4 as I first thought (with the idea of 34. Bxe4?? Rc1+ 35. Rxc1 Rxc1#) because of 34. Qa7+! Kf8 35. Qxa3 Bxc2+ 36. Kb2 Bxd1 37. Nxf6+ Ke7 38. Nd5+ with a draw. 33...Rxc2! 34. Qxc2 Rxc2 35. Kxc2 Bxe4+ 36. Kc3 Be3 37. Ng3 Bc6 38. Kd3 Bb6 39. Ke2 b4 and Black should win the endgame, with two bishops and two connected passed pawns against rook and knight. |
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Jan-30-12
 | | LIFE Master AJ: Still a nice problem ... and a good illustration of Kotov's candidate move system. |
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Jan-30-12
| | LIFE Master AJ: I did Fritz this one, at least a little bit. From Fritz's and Houdini's reaction to Qf1, I would have to say that the move was an error. |
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| Jan-30-12 | | Nemesistic: You SHOULD be a GM!!!! |
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Jan-30-12
| | LIFE Master AJ: I agree completely, F.f.B!
;) |
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Mar-30-15
 | | FSR: Wow!! |
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| Dec-10-23 | | Brenin: 31 ... Qxc3 32 Rxc3 Rxc3, doubly attacking the B on c2, and if it moves then 33 ... Rc1+ 34 Rxc1 Rxc1 mate. White should defend it with 33 Qe2, Qf2 or Qg2, leading to 33 ... Rxc2 34 Qxc2 Rxc2 35 Kxc2 Bxe4+ 36 Kc3 Be3 when Black's 2B+2P look a little better than White's R+N. Instead, 33 Qf1 leads quickly to disaster on the second rank, with the P on a3 playing a crucial role in suoortiung a R on b2. |
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Dec-10-23
 | | al wazir: 33. Qxc3 Rxc3 34. Nxf4 exf4 35. Rd3 seems to solve white's problems. |
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| Dec-10-23 | | Brenin: <al wazir>: After 33 Qxc3 Rxc3 34 Nxf4 exf4 35 Rd3, Black has 35 ... Rxc2 36 Kxc2 Bxe4 37 Kc3 Bxd3 38 Kxd3 d5, and there is a delicate K+P endgame which Black can win by triangulation. |
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| Dec-10-23 | | FM David H. Levin: <LoveThatJoker: <David2009> I'm not sure how al wazir's scale works. I'm interested to know though!> My guess (and possibly yours also) is that <al wazir> would award 1 point for Monday, 2 points for Tuesday, ..., up to 7 points for Sunday. |
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| Dec-10-23 | | mel gibson: Just bulldoze through.
Stockfish 16 says:
31. .. Qxc3
(31. .. Qxc3 (Qc5xc3 Rd3xc3 Rc7xc3 Qf3-f2 Rc3xc2 Qf2xc2 Rc8xc2 Kb1xc2 Ba8xe4+ Kc2-c3 Bf4-e3
Nh5-g3 Be4-g2 Kc3-b4 d6-d5 Kb4xb5 Bg2-f3 ) +4.24/54 542) score for White +4.24 depth 54. |
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| Dec-10-23 | | 1stboard: What happens if white plays 33 Qe2 ( or Qf2 or Qg2 , but I think Qe2 is best ) ?? If black plays Rxc2 , 33 White Qxc2 and return the queen. Looks like 33 Qf1 was a mistake ?
Am I missing something ? |
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Dec-10-23
| | chrisowen: Pov u its hey flagged its Qxc3 abridge axled its ho its acrid mid bug a its Qxc3 dug; |
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Dec-10-23
 | | Fusilli: I only looked at 33.Qe2 Rxc2 34.Qxc2 Rxc2 35.Kxc2 Bxe4+ 36.Kc3 Be3 37.Ng3 Bf3 and I concluded black had a winning position. I did not consider 33.Qf1. |
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| Dec-10-23 | | alshatranji: I concluded that Qxc3 is the only way to make progress, but I admit I wasn't sure where to go from there. For example, after 33 Qxc3 (returning the material), then 33...Rxc3, Black has an extra pawn and better position, but I don't see a decisive advantage. |
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