It means the latter. A piece confined to the first rank has to be on the first rank at the beginning and end of any move it makes.
Shortest-proof-game challenge
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Nov 2, 2023
0
#5763
n9531l1 wrote:
It means the latter. A piece confined to the first rank has to be on the first rank at the beginning and end of any move it makes.
But how could a rook be confined to the first rank and also be able to participate in castling?
amrugg wrote:
n9531l1 wrote:
It means the latter. A piece confined to the first rank has to be on the first rank at the beginning and end of any move it makes.
But how could a rook be confined to the first rank and also be able to participate in castling?
You should be able to figure that out. Maybe it would help if you made a proof game that included castling and played through it, to see if you could pause your game at a time when the rook is not on the first rank.
I call this checkmate position "Rook rage" lol
@5799
First attempt:
@5801 One move faster:
tygxc wrote:
@5801 One move faster:
Correct, and currently shortest.
Nov 3, 2023
0
#5769
n9531l1 wrote:
tygxc wrote:
@5801 One move faster:
Correct, and currently shortest.
The king and the rook are not confined to the first rank, however, since they never moved at all, and therefore never moved to the first rank.
Those who think they can explain the problem to amrugg are welcome to try. Their chances may not be good.
Nov 3, 2023
0
#5771
Wow this is a really fun idea! But I'm not nearly big brained enough to figure any of these out haha
Nov 3, 2023
0
#5772
Challenge: find the fastest game that ends with (white/black) playing Kxe1#.
BishopTakesH7 wrote:
Challenge: find the fastest game that ends with (white/black) playing Kxe1#.
Here's the first idea that came to me.
Nov 3, 2023
0
#5776
#5801
I kept getting 20 for a while, but I've managed to get to 19 after a bit of testing. Can anyone reach 18 moves or shorter?
Nov 3, 2023
0
#5777
Rocky64 wrote:
Similar to n9531l1's but shorter...
Based on both games, I created a somewhat symmetrical version; it's not shorter, but I thought it looked somewhat nice.
Rocky64 wrote:
Similar to n9531l1's but shorter... (#5808)
That's really getting short. I wonder what BishopTakesH7 had ready.
BishopTakesH7 wrote:
Challenge: find the fastest game that ends with (white/black) playing Kxe1#.
It took me quite a few more moves to have the black king give the mate.
Read the problem statement. There's a special condition that a piece moving to the first rank can't leave it. There's a separate condition that at the end, all remaining pieces have to be on the first rank. There's another separate condition that at the end, the remaining pieces on the first rank are confined to the first rank.
Is it that at the end of the checkmate, all pieces have to be confined to the first rank or that at the end of the proof game where White has the opportunity to deliver mate in one all pieces have to be confined to the first rank?
If it's the latter, then that position would not work, because the rook and the king would have to be confined to the first rank and that means that neither could be used in castling.