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Chess World Online Chess Forum - Helpmate in 1

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  Helpmate in 1 - Other Solutions

mrmip

Chess rating: 2965



 Topics started


Finland
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Sat Jan 21 2006 10:05PM | MsgID: 3424221


I believe that the standard in helpmates is really to start with a black move. This has a benefit that the series of moves always ends in mate in given number of moves. It is also customary to include the mating move - contrary to convention in direct mates, where the last mating move is normally left out.

Retractions or retromoves are really a world apart. There are two basic ways to write them down and both are used.
Say you want to describe a situation, where Bishop is currently on b1 and you uncapture a knight on that square and return the bishop to a2. Then the traditional way to write this retraction is -1.Ba2xNb1 and if the knight moves next to a3, you write -1... Na3-b1. These are exactly the moves that happened in the forward play. You also need to write always the complete move - there is no comfortable shorthand.
However, many people (me included) feel that writing the moves by starting with the destination square is counterintuitive. Therefore I prefer the more modern way to write the retro moves just like forward moves but with uncaptures and unpromotion indicated in parentheses. This - called Kemp notation - also allows a shorthand.
So the above would be: -1.Bb1-a2 (xN) Nb1-a3 [Long Kemp] or -1.Ba2(xN) Na3 [Short Kemp]

As for the problem magazines I can only refer you to PCCC (Permanent Committee of Chess Compositions) page:
http://www.saunalahti.fi/~stniekat/pccc/links.htm
which contain links to most remarkable papers. Take your pick!

mrmip



Edward J Boyle

Chess rating: 3001
LCF 1824






 Topics started


United States
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Sat Jan 21 2006 5:04PM | MsgID: 3421944


Originally posted by: "Philip"
Take back white's and black's last moves, then make one (helpful) black move which enables white to checkmate on his next move. (Dr. Julio Sunyer, The Chess Amateur, 1923)

Retract -1. Kg6xRh5 Rh8xQh5 and play forward 1. O-O Qh7#




To Philip or MrMip,

This is where my lack of solving chess problems comes into play, and one of those areas are listing the moves. Chess Life (USA) does have Helpmates (Key Krackers by David Brown) and I have learned to write the solutions with Black to move first, yet in the White area. It still looks awkward to me. 1. Black White 2. Black White#

Is the way you wrote the answer to this retraction correct? In my "normal" chess mind I would think that the following looks better:

1....... Rh8:Qh5
2.Kg6:h5 or maybe 1.Rh8:Qh5 Kg6:h5

1...... O-O
2. Qh7# and/or 1.O-O Qh7#

I just do not know the correct way to write the solutions to this type of problem. The way Philip wrote the retraction part was a bit confusing for me.

Thank you for any help.

Also, gentlemen, what problem magazines would you recommend and why? When StrataGems started, David Brown sent me the first 2 issues, but I never sent in my results, nor did I subscribe at the time. (Not due to their rates, but I was unemployed at the time.) I do know that there are a lot of websites, but I think I would prefer the hard copies.

Again, Thank you for your time.

Regards, Rev. Edward J Boyle



mrmip

Chess rating: 2965



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Finland
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Sat Jan 21 2006 4:37PM | MsgID: 3421757


Okay. I gave you exactly one (1) hour to see if you are awake and vigilant.

Apparently you are not

The Rf1xRf5 does NOT lead to mate in vaird puzzle, since king can escape in the final position. Only Rf1xQf5 will do!

mrmip



mrmip

Chess rating: 2965



 Topics started


Finland
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Sat Jan 21 2006 3:38PM | MsgID: 3421491


Solution to Vaird Problem:

White retracts Kg4xRf5
Black retracts Rf1x(Q or R)f5
and instead plays 1. - Rf1-h1
when white mates with 2.Qf5-f2# or Rf5-f2#

==================
Solution to Pogosyant's joke:

White has just played the 'half-move' a7- a8 and removed the pawn.
Next he will do '=Q' half and place the queen on a8 with mate.



Philip

Chess rating: 2238
LCF 160 Fide approx. 2050






 Topics started


England
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Sat Jan 21 2006 1:23PM | MsgID: 3420811


Take back white's and black's last moves, then make one (helpful) black move which enables white to checkmate on his next move. (Dr. Julio Sunyer, The Chess Amateur, 1923)







Analyse position


Retract -1. Kg6xRh5 Rh8xQh5 and play forward 1. O-O Qh7#



mrmip

Chess rating: 2965



 Topics started


Finland
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Thu Jan 19 2006 2:18PM | MsgID: 3407287


Yes, Sir! We are approaching fast to an empty board here.

With only two kings on board, I feel only retractors, jokes and some numeric puzzles are possible.
Here are some further examples:
Vaird 1910 (Similar to Sunyer)







Analyse position


White and black retracts the last move.
Black makes another helpful move and white mates in 1.

And a joke from Pogosyants 1963.







Analyse position


Mate in 1/2 move...





papadoble

Chess rating: 2442



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France
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Thu Jan 19 2006 9:07AM | MsgID: 3405727


Now, this is ultra-lightness!!



Philip

Chess rating: 2238
LCF 160 Fide approx. 2050






 Topics started


England
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Wed Jan 18 2006 4:33PM | MsgID: 3401236









Analyse position


White has just moved. Take back his and black's last moves, then make one (helpful) black move which enables white to immediately checkmate. (Dr. Julio Sunyer, The Chess Amateur, 1923). Solution at the weekend.