Illegal Position Contest!

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tacticspotter
n9531l1 写道:
EvinSung wrote:

[Two illegal positions, one obvious, one less obvious]

 

how is first one illegal

n9531l1
tacticspotter wrote:
n9531l1 写道:
EvinSung wrote:

[Two illegal positions, one obvious, one less obvious]

how is first one illegal

Think about how the white king made it to the 8th rank.

Ilampozhil25

yeah..

MARattigan

First one is legal.

Art 3.5 is: When making these moves, the bishop, rook or queen may not move over any intervening pieces.

It says you can't move over, but it doesn't say you can't move round

Pinball90
MARattigan wrote:

First one is legal.

Art 3.5 is: When making these moves, the bishop, rook or queen may not move over any intervening pieces.

It says you can't move over. It doesn't say you can't move round

 

-_-

Pinball90

is dis legal?

Pinball90

legal?

MARattigan
Pinball90 wrote:
 

legal?

Your FEN says White has the move, but Black is in check.

Legal if Black has the move.

n9531l1

In compositions, the FEN is ignored. One side needs to have the move if the composer stipulates it.

OrphanGenerator
KMMCS88 wrote:
epicusernamehere wrote:
ThebestA9player wrote:

white to move

This is possible because of 1. Nf3 e6 Ng1

After those moves, it's Black to move.

oh

OrphanGenerator

I think it's been a week since last submission?

MARattigan
n9531l1 wrote:

In compositions, the FEN is ignored. One side needs to have the move if the composer stipulates it.

But don't compositions also have to be legal positions? If so we should shut up shop.

n9531l1

Ideally, compositions should be illegal but look like they might be legal in an illegal position contest. The composer should state if there's a side to move requirement. Of course, anyone who wants to shut up shop is free to do so. Participation is voluntary.

n9531l1
epicusernamehere wrote:

I think it's been a week since last submission?

It's certainly illegal. Black still has his whole army and White has a doubled pawn.

Ilampozhil25
Pinball90 wrote:
 

legal?



Ilampozhil25
MARattigan wrote:
Pinball90 wrote:
 

legal?

Your FEN says White has the move, but Black is in check.

Legal if Black has the move.

black is in checkmate

n9531l1
Ilampozhil25 wrote:
MARattigan wrote:

Your FEN says White has the move, but Black is in check.

Legal if Black has the move.

black is in checkmate

But checkmate is not illegal. The checkmated side always has the move.

MARattigan
Ilampozhil25 wrote:
MARattigan wrote:
Pinball90 wrote:
 

legal?

Your FEN says White has the move, but Black is in check.

Legal if Black has the move.

black is in checkmate

I'd noticed that. That's why I said "has the move" rather than "to play".

Art. 1.3 says: A player is said to ‘have the move’ when his opponent’s move has been ‘made’. (The term "made" is defined in art. 4.) So if, in a legitimate game, a player is checkmated, that player has the move, but is not to play since the game is terminated.

In an illegal position it can't be assumed that if one (or both) players is check(mat)ed he has the move.

n9531l1
n9531l1 wrote:
epicusernamehere wrote:

[#4865] I think it's been a week since last submission?

It's certainly illegal. Black still has his whole army and White has a doubled pawn.

Would removing the b7 pawn make the position legal?

consumemoreboccoli

the original post was my sixth birthday