Now I get it 
! Thanks, I didn't think about the right capture 
all along! Both my previous versions are indeed incorrect, and yours fixes it.
PS: (I tried not to spoil too much the answer)
Rebuild-it puzzles
Sort:
You're welcome! Puzzles are all about deciding which solution you want and tune the diagram to support it. You can probably make like 4 different (but similar looking) puzzles from the idea! In this version I demonstrated how you can make variations in the solution. That is a good direction to take if you want to make the whole puzzle type more challenging!
Hi KlekleLegacy,
Here you can see what others (retro-composers) do with your puzzle type. The solution is in the posts following the link post.
https://www.chess.com/forum/view/more-puzzles/hardest-mate-in-1-puzzles?page=22#comment-84479703
(Puzzle #14):
Pieces to place: 
and 3x.
Resulting position: White to play and it is White's sixth move to play in the game.
and 3x
.Resulting position: White to play and it is White's sixth move to play in the game.
---
(Puzzle #15):
Pieces to place: 
, 
and 
.Resulting position: White to play and it is White's fifth move to play in the game.
Yep that works! But you lost the checkmate that was the signature of your Rebuild-it challenges. And also of the one I linked to you!
(Puzzle #16):
Position 16-A: White to play
Consider the position 16-A above, then look at this position.
Pieces to place: , , , , , 2x.
Resulting position: White to play and White has played three moves since position 16-A.
, 
, 
, 
, 
, 2x.Resulting position: White to play and White has played three moves since position 16-A.
(Puzzle #17):
Pieces to place: .
.Resulting position: White to play, White is not checkmated, and Black can checkmate in no more than 5 moves".
The last diagram is dualed. Though there is just 1 square for the queen, there are several ways for black to mate in 5.
Btw, there is nothing wrong with placing the bQ on a square where it checkmates the king like in some of the earlier puzzles. And "checkmate in n moves" always means "checkmate in at most n moves" which makes immediate checkmate a valid solution. You can resolve that by adding a black pawn or a black squared black bishop instead of a queen
Arisktotle a écrit :
... And "checkmate in n moves" always means "checkmate in at most n moves" which makes immediate checkmate a valid solution ...
You are right, thank you for reminding me this.
I simply changed the statement this time. I will be more careful in the future.
(Puzzle #18):
Pieces to place: and .
Resulting position: White to play and mate in one for Black.
and .Resulting position: White to play and mate in one for Black.
It's better but only addresses the second issue. The first issue is that black has several ways to mate in 5 after placing the queen. In the earlier "Rebuild-it" puzzles the checkmate sequences were always unique which is the right way. You could rephrase the instructions to get a unique solution: "place the black queen on a square (not checkmate) such that black can checkmate in no more than 5 moves". By focusing on the square for the queen the mate-in-5 no longer matters. It's all about placing the black queen.
I changed #17's resulting position requirement for what you suggested. The solution is now unique.
(Puzzle #19):
Pieces to place: .
Resulting position: White to play and mate in one for Black.
.Resulting position: White to play and mate in one for Black.
KlekleLegacy wrote:
I changed #17's resulting position requirement for what you suggested. The solution is now unique.
I suppose it works this way but the instructions could be clearer. Also the puzzle is much more interesting with a unique "mate-in-n" sequence. The art of puzzling is not to change the rules every time something does not work the way you want it to but change the setup of the diagram such that it does work! In the end it is better to let some of those puzzles go if you can't find an elegant resolution to the problems. Kill your darlings is how they call that in the creative arts. In my life I have given up on more ideas than I succeeded in realizing. It is part of the trade.
Apr 28, 2023
0
#57
wait i can find atleast one solution there
fxg1+R#, blacks king is on a nonattacked square, white has 13 pieces (including king) on the board and two captured (one for b file) and white excess promotions are easily covered by black
Puzzle 19: This is a clever puzzle with some nice ideas! I first thought it was wrong but when I looked closer I saw that I was wrong!
Ilampozhil25 wrote:
wait i can find atleast one solution there
fxg1+R#, blacks king is on a nonattacked square, white has 13 pieces (including king) on the board and two captured (one for b file) and white excess promotions are easily covered by black
(about puzzle 19 I suppose) it is correct and there is a solution indeed but it all depends on where you place the black king. The move "R#" refers to a rook giving checkmate and that is impossible. Unless you mean a different unit than a rook (some nations use different symbols). Btw, do you know black's last move?
I did take the impossibility of e.p. into account which is a good trap . As a retrograde composer I always check the e.p. options! The 3rd solution which you missed in both your versions concerns the pawn placement which solves my suggested correction below! The instructions are the same except that black mates in 1 instead of 2 moves. Note that one of the e.p. moves is now legal but does not solve the puzzle!
-