Unusual endings
-
- Posts: 348
- Joined: Sun Jan 26, 2014 9:23 pm
Unusual endings
I am playing a game of "Daily Chess" on chess.com (akin to correspondence chess) and reached an ending I had never seen before - I had bare K, Q, R, R (no pawns) - opponent had K, Q, N, P, P, P - the 3 pawns being on f7, g6, h7. The game has now progressed to a R vs 3P ending covered by Reuben Fine, which I hope to win shortly - I should say no more as the game is in progress.
... but my question is, how unusual is such an ending? I had never seen anything like it. Is it possible to search databases for this and other unusual material imbalances?
... but my question is, how unusual is such an ending? I had never seen anything like it. Is it possible to search databases for this and other unusual material imbalances?
-
- Posts: 21350
- Joined: Tue Apr 15, 2008 2:51 pm
Re: Unusual endings
Certainly, but it's likely to be part of their more advanced features and sometimes difficult to use as a consequence. You are probably banned from using them during play, but R v 3 pawns is within the scope of six man tablebases.Andy Stoker wrote: ↑Mon Jul 05, 2021 7:43 amIs it possible to search databases for this and other unusual material imbalances?
-
- Posts: 5851
- Joined: Wed Apr 30, 2008 12:28 pm
Re: Unusual endings
"You are probably banned from using them during play, but R v 3 pawns is within the scope of six man tablebases."
Ironically, if you are playing ICCF events you can make claims based on 7-man tablebases, but ICCF don't ban any sort of computer.
The original ending sounds fascinating!
Ironically, if you are playing ICCF events you can make claims based on 7-man tablebases, but ICCF don't ban any sort of computer.
The original ending sounds fascinating!
-
- Posts: 3575
- Joined: Wed Jul 02, 2008 4:31 pm
- Location: Awbridge, Hampshire
Re: Unusual endings
One in a few million games if my database is anything to go by (ignoring games where the material balance occurred for one move during a series of captures).
Yes. Easy.Andy Stoker wrote: ↑Mon Jul 05, 2021 7:43 amIs it possible to search databases for this and other unusual material imbalances?
-
- Posts: 21350
- Joined: Tue Apr 15, 2008 2:51 pm
Re: Unusual endings
That's actually the logical plan. First get the queens off, then sacrifice the exchange to reach R v 3 pawns. If the opponent declines to trade queens or allow an exchange sacrifice, progress might be made with mating threats or threats to win pawns. R v 3 isn't always won though if the pawns are connected and get well advanced supported by the King.Andy Stoker wrote: ↑Mon Jul 05, 2021 7:43 amI am playing a game of "Daily Chess" on chess.com (akin to correspondence chess) and reached an ending I had never seen before - I had bare K, Q, R, R (no pawns) - opponent had K, Q, N, P, P, P - the 3 pawns being on f7, g6, h7. The game has now progressed to a R vs 3P ending
-
- Posts: 348
- Joined: Sun Jan 26, 2014 9:23 pm
Re: Unusual endings
Thank you Roger - that indeed was my plan - once I'd stopped the threats of perpetual and managed not to leave my rooks loose or forkable ... in fact he allowed the exchange sac first and then exchanged queens the first time I offered them - and headed straight for the wrong side of one of Fine's examples (297a)
The game will be full of inaccuracies but I can share once we've finished... how do I put it in the figurine notation with a diagram?
The game will be full of inaccuracies but I can share once we've finished... how do I put it in the figurine notation with a diagram?
-
- Posts: 21350
- Joined: Tue Apr 15, 2008 2:51 pm
Re: Unusual endings
There's a recent thread under "News and Support"Andy Stoker wrote: ↑Mon Jul 05, 2021 10:47 amhow do I put it in the figurine notation with a diagram?
viewtopic.php?f=8&t=11788
-
- Posts: 348
- Joined: Sun Jan 26, 2014 9:23 pm
Re: Unusual endings
Excellent - thank you again