| Jan-23-21 | | Messiah: "The Fellowship of the Ding" |
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Feb-02-21
 | | al wazir: What does white do after 83...Bg5, followed by 84...f6 ? |
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Feb-02-21
 | | beatgiant: <al wazir>
Very interesting. 83...Bg5 is indeed a tablebase draw, but so is 83...Bb2. Black went wrong later on.But ...f6 is not a good plan, because it leaves a gap on the light squares. For example, 83...Bg5 84. Ke4 f6 <85. Kf5> is now a tablebase win. For example, 83...Bg5 84. Ke4 f6 85. Kf5 Kg7 86. Rc3 Kh6 87. Kg4 Kg7 88. Rc7+. Now 89...Kh6 90. Rf7 with zugzwang, or 89...Kf8 90. Kf5 Kg8 <91. h6> Bxh6 92. Kxf6 with a book win (black king in the wrong corner and soon loses the bishop). Evidently Ding knew what he was doing, but it's worth a lot of study for an ordinary player like me. |
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Feb-02-21
| | beatgiant: 94...Kh6 was losing. Black needed to play <94...Bg5+> first. The subtle difference is, after 94...Bg5+ 95. Ke8 Kh6 96. Rh3 Kg7 97. h6+, now Black can play 97...Bxh6 98. Rg3+ <Kf6>, an escape he doesn't have in the actual game with White's king still on e7. |
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Feb-02-21
 | | piltdown man: What did the pun have to do with the game?
Am I missing something?? |
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| Feb-02-21 | | Honey Blend: 24. ... ♕xa3 looks to be the main judgement error, allowing 25. ♕xb7 and creating a lasting weakness to the queenside pawns. The more defensive 24. ... g6 which also stops immediate ♕h5 and ♘f5 ideas, IMO is better. |
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| Feb-02-21 | | goodevans: <piltdown man: What did the pun have to do with the game?
Am I missing something??>
After suffering groundhog day since Saturday I'm not going to quibble about a poor pun. Welcome back GOTD! |
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Feb-02-21
 | | MissScarlett: Hate pun. Reported! |
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| Feb-02-21 | | morfishine: I'm certain there was a moratorium on Ding puns, and this is a pristine example why |
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| Feb-02-21 | | lentil: <What did the pun have to do with the game?
Am I missing something??> Maybe it refers to the length of the trek... |
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Feb-02-21
 | | keypusher: <Messiah> is permanently disqualified from complaining about anyone else's pun. |
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Feb-02-21
 | | chancho: <"The Fellowship of the Ding"> https://i.ytimg.com/vi/LFUNE4RwEpU/... |
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| Feb-02-21 | | goodevans: This is an absolutely mind boggling endgame. A crucial consideration seems to be whether black can at anytime take the h-pawn without either losing the B or getting the K trapped in the corner. From what I can see (without access to tablebases) the winning strategy starts with 121.Rh3 and goes something like this: 1) With your R on the h-file manoeuvre your K to f5 - <121.Rh3 Bc1 122.Ke6 Bd2 123.Kf5>. 
click for larger view2) Use an attack on the B to get your R to the 6th rank and then to f6 - <123...Bc1 124.Rc3 Bd2 125.Rc6 Be3 126.Rf6>. If black plays ...Bxh6 then a check on the 7th will win the B and/or get his K trapped in the corner. 3) Manoeuvre the K to h5 after which Rf7+ will win the B and/or trap the K whether or not black takes the P (N.B. getting the R to f6 was important to stop the K escaping via f8). Now I would say that Ding worked all this out on the hoof, which is pretty impressive, as otherwise I think he probably could have implemented it earlier. Maybe back on move 101... 
click for larger view... with 101.Re1.
As I said, I've tried to work this lot out without access to tablebases so I'd be more than happy to be corrected where I'm wrong. |
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Feb-02-21
| | beatgiant: <goodevans>
There are free tablebases on the web, such as https://syzygy-tables.info/ which is what I used when checking my posts above. I just checked move 101 and you are right, 101. Re1 does allow White to carry out the winning plan sooner. |
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| Feb-02-21 | | goodevans: <beatgiant> I've used the tablebase server provided by Lokasoft before but I've never been able to make it work with a mobile device, which is all I've got access to today. That link you provided works fine from my mobile. Not only that I prefer the user interface to Lokasoft's (at least the last time I used it). Many thanks for that. |
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Feb-02-21
| | beatgiant: I have to wonder whether 44. Nd4 was best. Was it overlooking Black's <45...Qxe3> resource? How about simply 44. Nb4 instead, preparing to reposition the knight via 45. Rd1 and 46. Nd5. After due preparations, White should be able to advance the e and f pawns for the eventual win. |
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| Feb-02-21 | | Brenin: <beatgiant>: For what it's worth, the engine gives +2.85 to 44 Rb4 Qd5 45 Nd4, +2.39 to 44 Nb4 g5 45 Nc2 g4 46 hxg4 Qxg4 47 Nd4, and +1.96 to the game continuation 44 Nd4 Bxd4 45 Rb4 etc. It looks as though White lost some of his advantage there. |
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Feb-02-21
| | beatgiant: <Brenin>
White has a rook for bishop, which explains the +1.96 eval, but what is the winning plan? The game line reached a tablebase drawn position on move 78. |
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Kibitzing
sac: 44.Nd4
