Yes I think that works! I take another look tomorrow - time for sleep - but everything appears to be well counted and well placed! I like the way Re8 and Bd8 block the dual solutions. Very well done! (provisionally)
Can you solve this seriesmate?
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Certified! Also looked at economy and expanding content but there is nothing obvious nearby like changing the position of a pawn or a rook which means it is technically pretty good. Problemists will always look for cheap reworks of your composition to take part of the credit. The best way to protect it is to make sure you pick the low hanging fruit yourself!
You are one of a few composers creating AP-logic problems. I am another one. I made some similar compositions myself where I used a fairy type with built-in seriesmoves. It's Warp-chess where white must make a series of as many moves in a row as the length of blacks last move (like ...Bd2-g5 is 3 squares so the length is 3). It's more retro than the common seriesmover because you can play complete games in Warp-chess. I didn't use the castling move to justify an e.p. move but to justify that I played 5 moves in a row - the length of a long castling move by my opponent. Just to show that AP-logic is not limited to e.p. and castlings.
Be careful to always explain and indicate when you use AP-logic because most problemists believe it's weird or they simply don't get it!
@Arisktotle That's nice. Thanks!
@KMMCS88 A posteriori is nicely explained in one of @Rocky64's blogs about en passant (hope you don't mind that, @Rocky).
https://www.chess.com/blog/Rocky64/chess-problem-conventions-re-castling-and-capturing-en-passant
KMMCS88 wrote:
What's AP logic?
What's relevant for this problem is that white must castle before he is allowed to checkmate otherwise he would not justify his earlier e.p. move. That's how the seriesmate takes 3 rather than 2 moves.
Apr 29, 2021
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#27
That's a very nice AP problem, @Graywing13. It's quite unusual to have a series-mover with retro content, so that increases your chance to making something original.
Thanks for referring to my blog about castling and e.p. conventions. Please fix the link which has a typo ("0" at the end).
@Arisktotle Indeed!
@Rocky Thanks! I fixed the link
Making something original in fields which have been intensely grazed is obviously hard. It's also rewarding because it makes your construction stand out amongst numerous competitors and that earns you loads of popular credit.
The other choice is to design your own fairy type or participate in types that have just opened up. Probably less credit and less sharing with composition peers but also more adventure in the exploring of new territory.
I have created a number of retro-logical problems to show there is yet an enormous almost unexplored domain of composition consisting of retro-logics applied to suitable fairy types. Your problem is also in that domain. Here is a link to a prize winning example which shows that AP-logic is not just about e.p. and castling as many believed a while ago. https://pdb.dieschwalbe.de/P1070028 It is a reflexmate problem which is a selfmate where both sides are obligated to give a mate in 1 if they can.
Note that the comments to that problem show that composers still wrestle with the theory of AP-logic just as they still wrestle with Retro-Strategy-logic. So, if you were to continue in that direction, be prepared to meet with confusion and misunderstanding. There are yet barriers to bring down.
Yep, it works.