# 8 Queens

MetBierOp
Posers and Puzzles 10 Sep '07 16:18
1. 10 Sep '07 16:187 edits

- No Queen may defend another

-edits-
Messing with FEN
2. 10 Sep '07 16:582 edits
I think I'm going wrong somewhere. Firstly, the queen on E has to be on E6:
3. 10 Sep '07 16:59
Next, the queen on D has to be on D2:
4. 10 Sep '07 16:59
Next, the queen on C has to be on C7:

Now wherever you put a queen on the A file it covers both F squares and vice-versa.
5. wolfgang59
Mr. Wolf
10 Sep '07 18:19
Cant fault that logic! The only 8 queen solution I have seen is where all the Queens are the same knight-move apart (ie 2up 1right, 2up 1right, 2up 1right).

Initial set-up must be wrong.

?
6. 11 Sep '07 22:201 edit
Originally posted by wolfgang59
Cant fault that logic! The only 8 queen solution I have seen is where all the Queens are the same knight-move apart (ie 2up 1right, 2up 1right, 2up 1right).

Initial set-up must be wrong.

?
yes it is wrong Qh4 should be Qh3
sorry for that

[b]
7. 12 Sep '07 02:09
Here is my analysis of the problem in the next 3 posts (1 fen per post):

I've place Pawns on squares that are not attacked:

8. 12 Sep '07 02:09
If a Queen were at e7, then that eliminates c7, d6 & d8 leaving only c2 and d2 for c and d files, therefore the e Queen must be on e4.

9. 12 Sep '07 02:10
Thus a2 and c7 must be Queens, eliminating possible Queens for the d file.

I conclude that it is not possible
10. SwissGambit
Caninus Interruptus
12 Sep '07 03:05

The Qb5 should be on b4.
11. Dutch Defense
Stealer of Souls
13 Sep '07 02:372 edits

don't mind the kings
12. SwissGambit
Caninus Interruptus
13 Sep '07 03:16
Originally posted by Dutch Defense
[fen]k6Q/5Q2/3Q4/1Q6/6Q1/4Q3/2Q5/Q6K w - - 0 1 [/fen]

don\'t mind the kings
Qa1 and Qh8 defend each other.
13. 19 Sep '07 18:19
Originally posted by MetBierOp
[fen]8/8/8/1Q6/7Q/8/8/6Q1 w - - 0 1[/fen]

- No Queen may defend another

-edits-
Messing with FEN
It cannot be done
14. c00ushion
I'll take the Draw
19 Sep '07 22:27
Originally posted by Arachnarchist
It cannot be done
It cannot be done? I love these puzzles and this Problem CAN be done its not easy though,

The 8 Queens go on these exact Squares this wont work anywhere else, Try it yourself, not one Queen is threatening another Queen.
From Line A-H
Queens:
1:a5
2:b3
3:c1
4:d7
5:e2
6:f8
7:g6
8:h4

Try it out for yourself it works. Its Very Possible ðŸ™‚
15. SwissGambit
Caninus Interruptus
19 Sep '07 22:36
Originally posted by c00ushion
The 8 Queens go on these exact Squares this wont work anywhere else,
Not only can your configuration be rotated 3 different ways, but there is an example in this thread of a solution with a Q on a center square. So, it's not quite true that the Queens must go on 'exact squares'.