# legal position?

Siebren
Posers and Puzzles 01 Apr '05 22:25
1. 01 Apr '05 22:251 edit
a premiere,
My first composed chessproblem on rhp ðŸ˜€

Is this position legal, and why is or isn't it.

please also tell me what you think about it, hard, easy, fun, boring, etc.
2. 01 Apr '05 22:27
Originally posted by Siebren
a premiere,
My first composed chessproblem on rhp

Is this position legal, and why is or isn't it.

[fen]rkb2b2/1pnppp1p/6p1/8/7B/2P1Pn2/1P1PP2P/1N1QKBNR w - - 0 1[/fen]

please also tell me what you think about it, hard, easy, fun, boring, etc.
Oh I forgot,.... it is whites move offcourse,....
3. PBE6
Bananarama
01 Apr '05 22:31
Illegal. White's black-square bishop couldn't have gotten out because the b- and d-pawns haven't moved.

Do I gots it?

4. 01 Apr '05 22:42
Nope
5. 01 Apr '05 22:522 edits
I think it is. (edit: especially from the previous post)

White needs to have promoted a pawn onto a free black square, two of which at b8 and d8 will do.

Black can get all of his king side pieces out of the way, thanks to the g pawn being moved - including bringing the rook over. Getting the queen out of the way.

White plays his a pawn up to a5, rook escapes to b6.

Blacks a pawn takes rook, then white pawn in turn captures pawns on b6, c7 before capturing a rook on d8 (from h8 originally, can get to that square), promoting to bishop.

Black knight captures the bishop on c1 and the g pawn.

Black loses his queen on e3 (pawn capture)
6. 01 Apr '05 23:07
Very good peakite.

Now lets make things a little harder,

Lets try the following diagram

Given is that Black is still able to castle. Is this a legal position?
7. 01 Apr '05 23:221 edit
Yes, even with your stipulation of the king having not moved.

The g-pawn can promote by capturing three pieces (not pawns) and the f-pawn needs to capture another.

Queen and rook make two (the rook one of the last two captures - cannot escape from behind the pawns. Captures on f6/h6, g7 and either f8/h8.

Both blacks a and c pawns can promote. White moves his a-pawn forward to let out the rook, c-pawn takes rook on b, then a pawn. Both black pawns can promote to provide extra pieces (queen, knight or rook will do).

Whites black bishop taken as before.
8. 01 Apr '05 23:30
Originally posted by Peakite
Yes, even with your stipulation of the king having not moved.

The g-pawn can promote by capturing three pieces (not pawns) and the f-pawn needs to capture another.

Queen and rook make two (the rook one of the last two captures - cannot escape from behind the pawns. Captures on f6/h6, g7 and either f8/h8.

Both blacks a and c pawns can promote. White ...[text shortened]... to provide extra pieces (queen, knight or rook will do).

Whites black bishop taken as before.
100% Correct.