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possible or impossible?


  • 20 months ago · Quote · #121

    Fralnp

    andrewjmen wrote:

    you're right Fralnp! it may look like your puzzle but i just wanted to show that if the pawn on e5 was on e6 the rook could be there by promotion

    Yes sadly, pigs will fly and gold fall off trees 'til I get a darn puzzle right.

    Thanks to notice the tiny flaw in my presentation. You seems yourself quite the expert in those retro puzzles. Great work!

  • 20 months ago · Quote · #122

    shoopi

    Alright I'll repost some good puzzles from the older thread that I linked before. Will post more if you like, but there are many hard ones there Smile

    Possible or Impossible?

  • 20 months ago · Quote · #123

    learningthemoves

    Not even with a knight in between because there's no way to reach that position with a knight there. And if a rook took a knight, then it wouldn't be white to move unless the king was still in check.

  • 20 months ago · Quote · #124

    Fralnp

    I've done puzzle 2

    Someone else can do the restTongue Out

  • 20 months ago · Quote · #125

    mashanator

    Number 1: Impossible, I believe. I tried it a few times and no matter what you do either the h-pawn or the King Rook is in the way of a knight. What I'm saying is Black has to play h6 to bring a Knight into h7 to be captured, but then how does the pawn on h7 promote on the g-file? It doesn't, and then there's no way to get into g8.

    Number 3:

    Also impossible, I think. There's no way for the b1-Bishop to be there.

  • 20 months ago · Quote · #126

    Adriandmen

    I remember the third one. I remember it as an mate in 3. It looks like a mate in 2, but to gain the position you are on move No. 48 or No. 49 i think. 

  • 20 months ago · Quote · #127

    bishshoy_das

    Fralnp wrote:

    I've done puzzle 2

     

    Someone else can do the rest

    In your solution, its black to move at the end, but the puzzle requires White to move as a criteria.

     

    This may be a possible solution to #122 - puzzle 2 :



  • 20 months ago · Quote · #128

    shoopi

    Correct, puzzle 2# has been solved.

     

    Also, the analysis provided by mashanator regarding puzzle 1# is true, but not quite complete as it does not explore all possibilities. Here's the full explanation: If white promoted a knight on h8, that means h6 must have been played. Now, there is no way to bring the knight to g8, because the only accessible square to it is f6, which would check the black king and force the capture of the knight.

    The other possibility is that white already placed a knight on g8 prior to promoting, and then black played h6 and white captured a black knight on h7. But now, the pawn cannot promote as it is blocked by the black rook on h8.

     

    Now only puzzle 3# left. It is harder and requiers more analysis. But doable if you like these things and invest the time to crack it Smile

  • 20 months ago · Quote · #129

    mashanator

    Oh right duh - the pawns on b3 and c4 got there via a2xb3xc4, move the bishop in then play b3.  I'll get to it. This is going to be a long night.

  • 20 months ago · Quote · #130

    mashanator

    I've given up. There's too many pieces in absurd positions to see what order to get them there in.

  • 20 months ago · Quote · #131

    bishshoy_das

    man, it looks like i need a teleportal to solve puzzle 3

    @#@%#^$^^!#^!&#%!*%#!&^$#!*%@^&!%#!%

    will try it again later

  • 20 months ago · Quote · #132

    shoopi

    Yes there are some problems with that one.

    Enjoy the challenge Cool

  • 20 months ago · Quote · #133

    Adriandmen

    The first one is possible:

  • 20 months ago · Quote · #134

    andrewjmen

    I was trying the third one but i couldn't get further than this can anyone say if i did something wrong



  • 20 months ago · Quote · #135

    shoopi

    That's a good try andrew, you can also bring white's dark bishop to f4. But you are still missing a couple of things:

    1) White needs to have a rook on g3.

    2) Black's king must reach h1.

    3) White's other rook must be on a3.

     

    Good progress so far though.

  • 20 months ago · Quote · #136

    andrewjmen

    I was stuck in the corner so i couldn't get anything passed it, that's why i wasn't able to complete the puzzle

  • 20 months ago · Quote · #137

    andrewjmen

    almost got it!

  • 20 months ago · Quote · #138

    shoopi

    Good job, however the last step of switching between the rooks positions is the hardest. Good luck.

     

    While you're struggling with that, here's an easier position I newly composed. Hope you enjoy solving:

     

    Can both sides castle?

    Edit: Due to an oversight the following condition must also be met: White cannot promote on either g8 or h8 squares.

  • 20 months ago · Quote · #139

    piphilologist

    shoopi wrote:

    Good job, however the last step of switching between the rooks positions is the hardest. Good luck.

     

    While you're struggling with that, here's an easier position I newly composed. Hope you enjoy solving:

     

    Can both sides castle?

     

    Yes, a knight can go to f8 blocking the check when the pawn promotes. Will post full line tomorrow

  • 20 months ago · Quote · #140

    shoopi

    piphilologist wrote:
    shoopi wrote:

    Good job, however the last step of switching between the rooks positions is the hardest. Good luck.

     

    While you're struggling with that, here's an easier position I newly composed. Hope you enjoy solving:

     

    Can both sides castle?

     

    Yes, a knight can go to f8 blocking the check when the pawn promotes. Will post full line tomorrow

    Hah, I know what you mean. I actually made a big mistake with this one, as I forgot the possibility of a kingside promotion.

     

    I might fix it in the future, but until then I will add a new condition:

    White cannot promote on either g8 or h8 squares.


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