Now posted: 8 coexisting queens

This is a fixed output challenge. Output a textual representation of a chessboard hosting 8 queens, none of which are attacking each other.

There are 92 ways of arranging them, 12 if rotations and reflections are discounted. You may choose any 1 of these arrangements.

You are not required to calculate or search for a valid arrangement. Hardcoding your choice of arrangement is one possible valid solution.

Input

• There is no input for this challenge

Output

• 8 newline separated lines of 8 characters, with an optional trailing newline
• Each character is either a queen or an empty square. You may choose any two distinct characters to represent a queen and an empty square
• No more than 1 queen appears in each row, column, and diagonal
• There are 8 queens in total
• Your output must be the same each time (your code must have deterministic output, even if it uses a probabilistic approach internally)

Examples

The examples show a queen as Q and an empty square as #. There are 12 examples, one for each of the fundamental solutions (before rotation and reflection). Any combination of rotating and reflecting one of these examples is also a valid solution.

###Q####
######Q#
##Q#####
#######Q
#Q######
####Q###
Q#######
#####Q##

####Q###
#Q######
###Q####
######Q#
##Q#####
#######Q
#####Q##
Q#######

###Q####
#Q######
######Q#
##Q#####
#####Q##
#######Q
####Q###
Q#######

###Q####
#####Q##
#######Q
##Q#####
Q#######
######Q#
####Q###
#Q######

##Q#####
#####Q##
#######Q
Q#######
###Q####
######Q#
####Q###
#Q######

####Q###
##Q#####
#######Q
###Q####
######Q#
Q#######
#####Q##
#Q######

####Q###
######Q#
###Q####
Q#######
##Q#####
#######Q
#####Q##
#Q######

###Q####
Q#######
####Q###
#######Q
#####Q##
##Q#####
######Q#
#Q######

##Q#####
#####Q##
###Q####
Q#######
#######Q
####Q###
######Q#
#Q######

#####Q##
#Q######
######Q#
Q#######
###Q####
#######Q
####Q###
##Q#####

###Q####
######Q#
Q#######
#######Q
####Q###
#Q######
#####Q##
##Q#####

#####Q##
###Q####
######Q#
Q#######
#######Q
#Q######
####Q###
##Q#####

The 12 fundamental solutions were taken from the Wikipedia page for the 8 queens puzzle which also provides them as images:

Scoring

Despite there being 92 valid outputs, this is a standard code golf challenge. Your score is the number of bytes in your code.

Explanations in answers are optional, but I'm more likely to upvote answers that have one.

posted about 2 years ago

CC BY-SA 4.0

2y ago

trichoplax‭

1020 reputation 83 17 129 470