Front Office Football Central  

Go Back   Front Office Football Central > Archives > FOFC Archive
Register FAQ Members List Calendar Mark Forums Read Statistics

Reply
 
Thread Tools
Old 03-10-2003, 10:55 AM   #1
QuikSand
lolzcat
 
Join Date: Oct 2000
Location: Annapolis, Md
OT - Chesspiece puzzle

As opposed to a "chess puzzle" (along the lines of "mate in two") this is simply a chesspiece puzzle. The setting doesn't involve an actual game of chess, just knowledge of how the pieces work.

Using a standard 8x8 chessboard, and with the traditional move of a knight (two spaces in one orthogonal direction, then one perpendicular space either way... I presume you get the idea), here's the puzzle:

What is the smallest number of knights that can be placed on a chessboard such that every single space is either occupied by or threatened by a knight?

[edit for poor grammar only]


Last edited by QuikSand : 03-10-2003 at 11:53 AM.
QuikSand is offline   Reply With Quote
Old 03-10-2003, 11:00 AM   #2
HornedFrog Purple
Hattrick Moderator
 
Join Date: Jun 2002
Location: Fort Worthless, Tx
I will let it sit for a while instead.... sorry
__________________
King of All FOFC Media!!!
IHOF: Fort Worthless Fury- 2004 AOC Deep South Champions (not acknowledged via conspiracy)

Last edited by HornedFrog Purple : 03-10-2003 at 11:15 AM.
HornedFrog Purple is offline   Reply With Quote
Old 03-10-2003, 01:03 PM   #3
rlfreeze
n00b
 
Join Date: Oct 2000
Location: Grenoble, France
Are you able to move multiple knights at the same time?

EDIT: Nevermind

Last edited by rlfreeze : 03-10-2003 at 01:05 PM.
rlfreeze is offline   Reply With Quote
Old 03-10-2003, 01:47 PM   #4
QuikSand
lolzcat
 
Join Date: Oct 2000
Location: Annapolis, Md
HFP... five minutes seems pretty quick for this puzzle. Did you "solve" it in that time, or have you seen this before?

Either way, thanks for not posting a super-quick spoiler...
QuikSand is offline   Reply With Quote
Old 03-10-2003, 01:53 PM   #5
HornedFrog Purple
Hattrick Moderator
 
Join Date: Jun 2002
Location: Fort Worthless, Tx
Both. It was actually in a chess training book I have, but it had been a long time since I had done it. It was more memory recollection than anything. I just never get your other ones, chess problems I enjoy.

I actually came up with two variations with the same number of pieces if my scribblings on a notepad are right. There may be more.
__________________
King of All FOFC Media!!!
IHOF: Fort Worthless Fury- 2004 AOC Deep South Champions (not acknowledged via conspiracy)
HornedFrog Purple is offline   Reply With Quote
Old 03-10-2003, 02:54 PM   #6
albionmoonlight
Head Coach
 
Join Date: Oct 2000
Location: North Carolina
I got 16 by dividing the board into 4 squares and showing that you can fill each square with 4 knights. However, I am sure that one with more time to fiddle than I have could cut that down a bit. Wish that I had more time to look at this one. . . .
albionmoonlight is offline   Reply With Quote
Old 03-10-2003, 04:08 PM   #7
albionmoonlight
Head Coach
 
Join Date: Oct 2000
Location: North Carolina
looked at it a couple more ways and still get stuck on 16. There has got to be a better answer, though. . .
albionmoonlight is offline   Reply With Quote
Old 03-10-2003, 04:35 PM   #8
Maple Leafs
Coordinator
 
Join Date: Jan 2002
Just curious: Are there any chess experts on this forum who'd be interested in a challenging chess problem?
Maple Leafs is offline   Reply With Quote
Old 03-10-2003, 04:54 PM   #9
Airhog
Captain Obvious
 
Join Date: Aug 2001
Location: Norman, Oklahoma
well ryche and Mattjones4heisman are really good players. I would enjoy a challenging problem myself.
__________________

Thread Killer extraordinaire


Yay! its football season once again!
Airhog is offline   Reply With Quote
Old 03-10-2003, 05:04 PM   #10
Maple Leafs
Coordinator
 
Join Date: Jan 2002
Quote:
Originally posted by Airhog
well ryche and Mattjones4heisman are really good players. I would enjoy a challenging problem myself.
I have one in mind that was reasonably straightforward, yet extremely difficult (to the point that grandmasters have failed to solve it). I'll dig around and see if I can find it.
Maple Leafs is offline   Reply With Quote
Old 03-10-2003, 05:11 PM   #11
Craptacular
College Starter
 
Join Date: Oct 2001
Location: The Mad City, WI
For the original puzzle, I got 16 for a couple of obvious patterns, but now I found one with 12.
Craptacular is offline   Reply With Quote
Old 03-10-2003, 08:37 PM   #12
AnalBumCover
College Starter
 
Join Date: Nov 2002
Location: La Mirada, CA
I got 12.
__________________
ABC's Game Giveaway list
AnalBumCover is offline   Reply With Quote
Old 03-10-2003, 08:45 PM   #13
QuikSand
lolzcat
 
Join Date: Oct 2000
Location: Annapolis, Md
12 is the best possible answer. Good work, ABC. Care to illustrate?
QuikSand is offline   Reply With Quote
Old 03-10-2003, 08:51 PM   #14
AnalBumCover
College Starter
 
Join Date: Nov 2002
Location: La Mirada, CA
Quote:
Originally posted by QuikSand
12 is the best possible answer. Good work, ABC. Care to illustrate?


Black square is occupied by a knight. Red square indicates threatened by knight.



Hope I'm right!
ABC
__________________
ABC's Game Giveaway list

Last edited by AnalBumCover : 03-10-2003 at 08:52 PM.
AnalBumCover is offline   Reply With Quote
Old 03-10-2003, 08:52 PM   #15
AnalBumCover
College Starter
 
Join Date: Nov 2002
Location: La Mirada, CA
can you all see the above picture???
__________________
ABC's Game Giveaway list
AnalBumCover is offline   Reply With Quote
Old 03-10-2003, 09:25 PM   #16
RPI-Fan
Pro Starter
 
Join Date: Nov 2000
Location: Troy, NY
No - but on a related note, did anyone watch the chess matches on ESPN over the past couple of weeks?

I found them suprisingly enjoyable.
__________________
Quis custodiets ipsos custodes?
RPI-Fan is offline   Reply With Quote
Old 03-10-2003, 09:31 PM   #17
Craptacular
College Starter
 
Join Date: Oct 2001
Location: The Mad City, WI
I think I made it on QS's ignore list.
Craptacular is offline   Reply With Quote
Old 03-11-2003, 12:26 AM   #18
AnalBumCover
College Starter
 
Join Date: Nov 2002
Location: La Mirada, CA
Quote:
Originally posted by Craptacular
I think I made it on QS's ignore list.


That's okay C-Tac, I'm sure you got the same answer I did.

For those who can't seem to view my above pic, I've attached it.
__________________
ABC's Game Giveaway list
AnalBumCover is offline   Reply With Quote
Old 03-11-2003, 06:03 AM   #19
QuikSand
lolzcat
 
Join Date: Oct 2000
Location: Annapolis, Md
Quote:
Originally posted by Craptacular
I think I made it on QS's ignore list.


Did anyone hear something?

(Sorry 'bout that... my attention span apparently only made it halfway through your answer. Nice job to you too, C.)
QuikSand is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is On
Forum Jump


All times are GMT -5. The time now is 08:42 PM.



Powered by vBulletin Version 3.6.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.