Isaac_D_Beall wrote:
The last move was Ra1#.
The queen's checking him too.
Is this position legal?
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Remellion wrote:
Nope, since from the diagram white cannot retract anything but a king or rook move.
I have conjured up another pretty little devil. Is the following legal a) as the diagram, b) without the c6-knight?
As usual, here's to hoping it's not cooked.
I think it's obviously illegal. There is an impossible double-check.
last two moves are ... b5 a5xb6 en passant checkmate
edit: as Archduke pointed out, it isn't checkmate. oops
angrypig wrote:
last two moves are ... b5 a5xb6 en passant checkmate
Why can't the King take b6? I don't think it is checkmate, but I think you are right about the previous moves.
Remellion wrote:
Nope, since from the diagram white cannot retract anything but a king or rook move.
I have conjured up another pretty little devil. Is the following legal a) as the diagram, b) without the c6-knight?
As usual, here's to hoping it's not cooked.
The last moves have to be -1.a5xb6ep b7-b5. Ba8 could only get there by promotion. f2->a7 is 5 pawn captures and black is missing 5 pieces, BUT the c8 B could not have been taken by the pawn (wrong color + it never left home). So a) is illegal. In b), Pf2 could have taken NNRB + bPc, while Black promoted a7 on b1 (by taking Bf1/Rh1/promoted h-pawn). So b) is legal.
Correct (again!) Hm. I'm having trouble composing puzzles. Either they're too easy for any sort of experienced solver yet too hard for unfamiliar solvers (like assuming that the only tricky bit was the double check); or they're just plain too easy for everyone. And also having trouble solving puzzles, but that's another kettle of fish.
Also, #240, legal with either side to move. 1. Nf3 e5 2. Ng1; or 1. Nf3 e6 2. Ng1 e5 are the shortest games.
Trivial?
My turn. Kinda trivial but heh.
Remellion wrote:
Correct (again!) Hm. I'm having trouble composing puzzles. Either they're too easy for any sort of experienced solver yet too hard for unfamiliar solvers (like assuming that the only tricky bit was the double check); or they're just plain too easy for everyone. And also having trouble solving puzzles, but that's another kettle of fish.
Also, #240, legal with either side to move. 1. Nf3 e5 2. Ng1; or 1. Nf3 e6 2. Ng1 e5 are the shortest games.
It is extremely rare that a puzzle works on both an experienced and beginner audience. I would just pick one or the other and direct your composition accordingly.
I see. Since I have no ability to faze anyone with any decent experience, I'll stick to easy compositions. Like this one. (@chaotic_iak: Nice idea, I'll take it.)
@Arkhimeedes: Unfortunately you hit the 50-move rule. :P Well, that requires the players to claim, and so without claiming that game might be legal, but I'm curious whether it's possible without hitting the 50-move rule?
Jan 26, 2014
0
#235
@chao it is possible without hitting it and quite easy actually
should be legal, if white pawns are going toward the bottom (board flipped)
Jan 26, 2014
0
#238
if the board isn't flipped then Rook on b5 is illegal and Rb4 is legal
Haha!
It's an impossible double check.