Mat queen

Mat queen - is achieved when the lone king is on the edge of the board no later than the 10th move from any initial position by the joint actions of the king and queen ^[1] .

Content

Example

	a	b	c	d	e	f	g	h
eight									eight
7									7
6									6
five									five
four									four
3									3
2									2
one									one
	a	b	c	d	e	f	g	h

White to move. Mate in 10 moves.

The only (with the exception of symmetric ^[2] ) is the position where, during their course, White with the Queen against the lonely king cannot give mate before the 10th move. Any white move (except 1.Fe5 + and 1.Ff6 +, where White loses the queen) leads to a mate in 10 moves. Approximate developments:

1. Fd4 Kpf7 2. Fd6 Kpg7 3. Fe6 Kpf8 4. Fd7 Kpg8 5. Kpb2 Kpf8 6. Kpc3 Kpg8 7. Kpd4 Kpf8 8. Kpe5 Kpg8 9. Kpf6 Kph8 10. Fg7 # or

1. Фb1 Kpd5 2. Фf5 + Kpd6 3. Kpb2 Kpc6 4. Kpc3 Kpd6 5. Kpc4 Kpc6 6. Фе6 + Kpc7 7. Kpb5 Kpd8 8. Фf7 Kpc8 9. Kpc6 Kpb8 10. Фb7 #

Stalemate

When matting with a queen, you should avoid the positions of the mirror stalemate.

	a	b	c	d	e	f	g	h
eight									eight
7									7
6									6
five									five
four									four
3									3
2									2
one									one
	a	b	c	d	e	f	g	h

Mirror pat

Interesting Facts

There are tasks where the white king is on c3 (or the fields c6, f6, f3 that are symmetric to it), and an additional condition is introduced - the white king is fixed. In this case, in any position, the white queen and the black king checkmate is reached no later than the 23rd move.

Notes

↑ A queen without help can push the enemy king to the edge of the board. However, to create a queen mat, support is required.
↑ A total of 8 positions, including symmetrical.

Literature

Chess: Encyclopedic Dictionary / Ch. ed. A. E. Karpov . - M .: Soviet Encyclopedia , 1990. - p. 237. - 624 p. - 100 000 copies - ISBN 5-85270-005-3 .