﻿﻿ MatPlus.Net

Website founded by
Milan Velimirović
in 2006

9:29 UTC
 ISC 2021
 Headlines Forum* Members DL Archive Links

Username:

Password:

Remember me

 Forgot yourpassword?Click here! SIGN INto create your account if you don't already have one.
 CHESS SOLVINGTournamentsRating lists1-Apr-2021
 B P C F

MatPlus.Net Forum Helpmates h#3 (unique solution)

You can only view this page!
Page: [Previous] [Next] 1 2

### h#3 (unique solution)

Hi, I wanted to share this helpmate in 3 that I composed some time ago:

(= 2+4 )

 (Read Only) pid=20742

Nice, and it took some time to solve it from screen ...
You should look for a twin, it's not very difficult to find phase b) with a different promotion by shifting the black king.

 (Read Only) pid=20744

I am glad you liked it!
What is a twin?

 (Read Only) pid=20745

A twin is a second problem, usually with the same stipulation, and most often by shifting one piece to another square. This is particularly common for helpmates. So the stipulation would be: "h#3 (b) bK->??" where "??" should be replaced by a nearby square. Other kinds of twins involve removing a piece, adding a piece, changing a piece or changing a stipulation

 (Read Only) pid=20746

Nice and tricky. :) Just to add to what Andrew said about twinning, here is one of the most famous examples: https://pdb.dieschwalbe.de/P0501066
The state of the art in helpmate composition has progressed so far that today it is highly unusual for short helpmates to be published with a single solution. But that shouldn't stop you from enjoying short single-solution helpmates with a nice idea. ;) Of course two or more solutions are better if they show some nice analogy, but adding a solution for the sake of adding a solution can ruin a problem.

 (Read Only) pid=20748

Miguel, feel free to get in touch with SEPA (Sociedad Española de Problemistas de Ajedrez) at: http://sepa64.blogspot.com/
We are currently running a thematic informal tourney for helpmates. You can also contact me (joaquimchessproblemATgmail.com) if you need more information about the society.

 (Read Only) pid=20750

Thanks for the explanations about twinning!
I understand now, it seems quite complex to design a puzzle with a meaningful twin.
I guess in the above puzzle, with the bK -> g6 or with bK -> g8 we would also have a unique h#3, but the solution is not that nice, since it involves queening.

@Jakob Leck: Do you mean that a helpmate puzzle should (nowadays) not be unique (multiple solutions) or is it that it should come with a twin?

@Joaquim Crusats: Thanks for the info, it looks very interesting and I didn't know about it!

 (Read Only) pid=20755

Usually short helpmates today have several so-called "phases", which can be
1)solution and set play (something like https://pdb.dieschwalbe.de/P0572335)
2)twins like in the example by Forsberg
3)multiple solutions in one position (e.g. https://pdb.dieschwalbe.de/P0500222).
Set play is a little bit out of fashion today and multiple solutions are considered superior to twinning because it is in some way more economical to not change the position. But you will still find examples for all three types published regularly. (And maybe I should add that of course solutions are indeed required to be unique. If it is intended by the author that a position has multiple solutions, this has to be mentioned in the stipulation, i.e. "h#2 3 solutions" or something like that.)

And the degree to which solutions show thematic analogy varies from
a)(almost) completely symmetric solutions (which I think are pointless)
b)solutions with a nice analogy (in theme, e.g. https://pdb.dieschwalbe.de/P0506222, or mate image, e.g. https://pdb.dieschwalbe.de/P0500053)
c)solutions with a theme that is "spread" over multiple solutions (e.g. https://pdb.dieschwalbe.de/P0500540)
d)limited degree of analogy of the solutions
e)very little or (almost) no analogy. (e.g. https://pdb.dieschwalbe.de/P0500524)
Feel free to explore... :)

Then, of course, there are long helpmates which more often have only one solution. But sometimes you have a short idea where you think no twin or second solution fits in, e.g.
Jakob Leck
Rhein-Neckar-Zeitung 21.04.2018
(= 2+8 )

h#3

 (Read Only) pid=20760

Same from here, my only (?!) h# I ever did was
one-phased. It's interesting that "mandatory"
twinning/multiple solution occurs only in the
h# genre, whereas it is rather non-standard
in the # or s#, and nonexistent (to my best
knowledge) in the study.

 (Read Only) pid=20761

Jacob gave good examples to show the beauty of helpmates.
I wonder which problems were superior to Maslar's masterpiece (https://pdb.dieschwalbe.de/P0506222) awarded with the 3rd commendation.

 (Read Only) pid=20763

This Maslar's helpmate is only an improvement of his previous work, and therefore only such an award:
http://helpman.komtera.lt/definition/Maslar_theme

 (Read Only) pid=20764

@Jakob: Your composition has a set play with rook reversal. And the Krikheli has a matching theme in both solutions: A piece can move to a square directly, but has to make a detour to allow the black king to pass a guarded square.

 (Read Only) pid=20765

Dear Viktoras, my task was awarded with a special prize. 8/4np2/2p5/4k3/6B1/3R1p2/5N2/Kb3qr1

 (Read Only) pid=20766

Thank you so much Jakob Leck (and all of you) for the nice explanations!

I will try to design some nice multi solution helpmate.

 (Read Only) pid=20767

I once made a short one-liner - enjoy:

Problemist Supplement 1995
(= 3+4 )
h#3

If Miguel wants to find more about helpmates he can't do better than Chris Feather's 'Black to Play' which can be downloaded from here:
https://juliasfairies.com/articles/black-to-play/

 (Read Only) pid=20769

You're welcome, Miguel. :) I agree with Neal's recommendation of 'Black to play' - an excellent book!

@Joost: Thanks for your remark. I can't remember whether I had seen the set play before publishing the problem because I don't keep detailed record of my ideas, but I'd guess I did. While the rook reversal is quite nice, the set play is essentially the solution minus a tempo so that the similarities are far to great for my liking. And it doesn't add that much to the main point of the problem, the r-r-Klasinc, so I prefer it without the set play.

 (Read Only) pid=20779

@Jakob: With the set play, additionally the Larsson theme would be:
http://helpman.komtera.lt/definition/Larsson_theme

My example with R-R Klasinc:
Viktoras Paliulionis
StrateGems 2019
(= 2+4 )
h#7

1.Rh7 Bg7 2.Re8+ Kd7 3.Se5+ Kd6 4.Sd7 Be5 5.Kc8 Kc6 6.Kd8 Kb7 7.Rhe7 Bc7#
1.Re8+? Kd7 2.R6e7+ Kd6 3. Kc8 Kc6 4.Kd8 Bb8(B~) 5.Se5+ Kb6 6.Sd7 Kb7 7.?? Bc7# - Black lacks a tempo move.

Tempo + Klasinc bR-bR and wB-bS.

 (Read Only) pid=20780

Neal, I liked your problem!
Such a wonderful eye-catching position and a tricky solution!

 (Read Only) pid=20781

I liked it too. It makes me think of this one (Bo Lindgren 1999) : I took 15 minutes for the (b) but 4 times more (!) for the (a).
(= 3+3 )

h#3
b) BBc8.

 (Read Only) pid=20786

Thank You very much, Viktoras!

 (Read Only) pid=20787

Read more...
Page: [Previous] [Next] 1 2

MatPlus.Net Forum Helpmates h#3 (unique solution)