# Knights Puzzle

Alex011893
Posers and Puzzles 05 Aug '05 04:04
1. Alex011893
The High Rate Clan
05 Aug '05 04:04
Here is a challenge.On a board,place 12 knights so all the squares on the board are occupied or threatened.Good Luck.

ðŸ™‚ðŸ™‚ðŸ˜‰ðŸ˜€
2. skeeter
515 + 30 days
05 Aug '05 05:311 edit
Originally posted by Alex011893
Here is a challenge.On a board,place 12 knights so all the squares on the board are occupied or threatened.Good Luck.

ðŸ™‚ðŸ™‚ðŸ˜‰ðŸ˜€
This should do it.

skeeter
3. skeeter
515 + 30 days
05 Aug '05 05:35
Originally posted by skeeter
This should do it.

[fen]8/5n2/1nn1nn2/2n5/5n2/2nn1nn1/2n5/8[/fen]

skeeter
What I've just noticed is that the board is also perfectly asymetrical.

skeeter
4. 05 Aug '05 09:16
Since it's solved, here's something amazing that i found recently about the so called knight tour. If you scroll down a bit (to the colored section) you will find the "SUPER magic square"....awesome, how the numbers in all columns, rows and quadrants add up in perfection.

http://www.edcollins.com/chess/knights-tour.htm
5. Palynka
Upward Spiral
05 Aug '05 13:191 edit
Originally posted by crazyblue
Since it's solved, here's something amazing that i found recently about the so called knight tour. If you scroll down a bit (to the colored section) you will find the "SUPER magic square"....awesome, how the numbers in all columns, ro ...[text shortened]... in perfection.

http://www.edcollins.com/chess/knights-tour.htm
That's quite amazing. Anyone has a maths explanation for this? It can't be a coincidence...can it?
6. Alex011893
The High Rate Clan
05 Aug '05 16:45
thanks to all.ðŸ™‚
7. 12 Aug '05 12:49
Originally posted by skeeter
This should do it.

[fen]8/5n2/1nn1nn2/2n5/5n2/2nn1nn1/2n5/8[/fen]

skeeter
how did you insert the chess board graphic?
8. Alex011893
The High Rate Clan
12 Aug '05 17:59
that is easy..
9. 25 Aug '05 23:38
place all 8 queens on the board that each other wont treaten or pass each other.
10. 26 Aug '05 16:39
Originally posted by inipsianini
place all 8 queens on the board that each other wont treaten or pass each other.
While this has already been done I did notice the word "all" that you placed before the 8 queens. Now the number of all possible queens would be 18 (2 from the beginning and 16 promoted). However I am uncertain if there is a legal sequence of moves leading to such position, and if there is, what is the shortest game that produces 18 queens?
11. 26 Aug '05 17:05
Originally posted by ilywrin
While this has already been done I did notice the word "all" that you placed before the 8 queens. Now the number of all possible queens would be 18 (2 from the beginning and 16 promoted). However I am uncertain if there is a legal sequence of moves leading to such position, and if there is, what is the shortest game that produces 18 queens?
16 promoted queens is not possible. There are only 7 non-pawn pieces reach side to capture. A pawn has to capture something to get behind the opposing pawn.
12. 26 Aug '05 20:42
Originally posted by Mephisto2
16 promoted queens is not possible. There are only 7 non-pawn pieces reach side to capture. A pawn has to capture something to get behind the opposing pawn.
I may be counting wrong but here's my idea: both sides have 6 spare pieces to be captured (excluding the queens and kings).
White gets 3 pawns at the g file with two captures (f and h pawn), 3 pawns at the d file with two more captures (c and e pawn) and lastly one more capture to get two pawns at b file (a-pawn); Black in similar manner get 3 on c and f files and h and a file pawns remain on their files. That's 5 captures from White and 4 on Black's part, accounting for 9 of the twelve spare pieces. Then the queens are promoted on the respective files.
13. 26 Aug '05 21:28
Originally posted by ilywrin
I may be counting wrong but here's my idea: both sides have 6 spare pieces to be captured (excluding the queens and kings).
White gets 3 pawns at the g file with two captures (f and h pawn), 3 pawns at the d file with two more captures (c and e pawn) and lastly one more capture to get two pawns at b file (a-pawn); Black in similar manner get 3 on c and f f ...[text shortened]... counting for 9 of the twelve spare pieces. Then the queens are promoted on the respective files.
It's possible. Just did it. No PGN sorry. It was utterly long, but not hard. Just a matter of moving stuff around.