15 Apr 05
Originally posted by Palynka
I think that if the queen captured a piece, there's the possibiliy of pinning itself so that it can't move to the square where the king was.
lets imagine following scenario: white checks black king with his queen (without capturing any enemy piece) so that no black piece can capture that queen. after black moves, can white somehow check black again? Is it possible in every legal situation and position?
15 Apr 05
1 edit
No, the queen could check and block check at the same time.
White king checked, queen blocks check and checks black king with the same move. Black king moves, but the queen is pinned.
Edit: Sorry, just realized you wrote that no black piece is able to capture the queen (therefore no blocking is possible).
BUT, when the black king moves it can be discovered check. 🙂
15 Apr 05
Originally posted by JusuhIt is not always possible.
lets imagine following scenario: white checks black king with his queen (without capturing any enemy piece) so that no black piece can capture that queen. after black moves, can white somehow check black again? Is it possible in every legal situation and position?
White has just played Qa3+. If Black responds with ...Ra6+, he prevents the white Queen from checking a 2nd time.
15 Apr 05
Originally posted by PalynkaYou were not wrong.
Actually, I was wrong. If it's discovered check than the queen can block and check. Maybe I should shut up and leave this for the pros. 😛
White has just played Qe3-b3+. If Black answers with ...Kc7+, the white Queen can't move to resolve the check and check black again.
15 Apr 05
Originally posted by BigDoggProblemnote that original question included "no piece can capture that queen".
You were not wrong.
[fen]b7/1k6/8/8/8/rQ3K2/8/8 w[/fen]
White has just played Qe3-b3+. If Black answers with ...Kc7+, the white Queen can't move to resolve the check and check black again.
anyway first diagram is good.
15 Apr 05
Originally posted by JusuhYou're right; for some reason I forgot that part of the stip on the 2nd position. However, it's not hard to fix:
note that original question included "no piece can capture that queen".
anyway first diagram is good.
Last move: Qf5-e5+. Any legal black King move can't be answered by a wQ check.
21 Apr 05
Originally posted by BigDoggProblemYou can just move the queen to d5 or f5, depending on where the king goes, with check, can't you?
You're right; for some reason I forgot that part of the stip on the 2nd position. However, it's not hard to fix:
[fen]3b4/4k3/8/2r1Q1K1/8/B7/8/8 w[/fen]
Last move: Qf5-e5+. Any legal black King move can't be answered by a wQ check.
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23 Apr 05
Originally posted by BigDoggProblemAre the black rook and white bishop actually required for that to be the case?
You're right; for some reason I forgot that part of the stip on the 2nd position. However, it's not hard to fix:
[fen]3b4/4k3/8/2r1Q1K1/8/B7/8/8 w[/fen]
Last move: Qf5-e5+. Any legal black King move can't be answered by a wQ check.
23 Apr 05
1 edit
Originally posted by iamatigerYes. The white Queen must be pinned to prevent her from blocking and counter-checking, and one of the stipulated conditions was that no black piece can capture the white Queen.
Are the black rook and white bishop actually required for that to be the case?