<s>
PyChess	B-Language
is	O
a	O
free	B-Application
software	I-Application
chess	B-Application
client	O
developed	O
for	O
GNU	B-Operating_System
.	O
</s>
<s>
It	O
allows	O
users	O
to	O
play	O
offline	O
or	O
online	O
via	O
the	O
Free	O
Internet	O
Chess	B-Application
Server	O
(	O
FICS	O
)	O
.	O
</s>
<s>
PyChess	B-Language
also	O
incorporates	O
a	O
built-in	O
chess	B-Application
engine	I-Application
,	O
which	O
in	O
contrast	O
to	O
most	O
other	O
chess	B-Application
AIs	I-Application
is	O
written	O
in	O
the	O
Python	B-Language
language	I-Language
and	O
focuses	O
more	O
on	O
fun	O
of	O
play	O
than	O
raw	O
strength	O
.	O
</s>
<s>
For	O
more	O
advanced	O
users	O
,	O
PyChess	B-Language
allows	O
for	O
virtually	O
any	O
other	O
external	O
chess	B-Application
engine	I-Application
to	O
be	O
used	O
with	O
it	O
.	O
</s>
<s>
Development	O
on	O
PyChess	B-Language
was	O
started	O
by	O
Thomas	O
Dybdahl	O
Ahle	O
in	O
2006	O
,	O
and	O
the	O
first	O
public	O
release	O
was	O
sent	O
out	O
later	O
that	O
year	O
.	O
</s>
<s>
The	O
release	O
contained	O
the	O
bare	O
minimum	O
of	O
features	O
to	O
play	O
a	O
game	O
of	O
chess	B-Application
,	O
and	O
was	O
backed	O
only	O
by	O
the	O
GNU	B-Application
Chess	I-Application
engine	O
.	O
</s>
<s>
In	O
the	O
end	O
of	O
2006	O
,	O
PyChess	B-Language
was	O
close	O
to	O
become	O
a	O
part	O
of	O
GNOME	O
Games	O
,	O
which	O
were	O
holding	O
a	O
usage	O
survey	O
of	O
aspiring	O
new	O
games	O
to	O
include	O
in	O
the	O
suite	O
.	O
</s>
<s>
Afterwards	O
there	O
were	O
talks	O
of	O
the	O
two	O
programs	O
merging	O
,	O
but	O
the	O
developers	O
decided	O
they	O
were	O
targeting	O
different	O
user	O
segments	O
,	O
with	O
PyChess	B-Language
aiming	O
towards	O
more	O
advanced	O
users	O
.	O
</s>
<s>
In	O
2009	O
PyChess	B-Language
won	O
Les	O
Trophées	O
du	O
Libre	O
in	O
Paris	O
in	O
the	O
category	O
of	O
hobby	O
computing	O
.	O
</s>
<s>
PyChess	B-Language
has	O
grown	O
steadily	O
since	O
then	O
,	O
with	O
increasing	O
year-to-year	O
development	O
activity	O
,	O
and	O
would	O
cost	O
more	O
than	O
$	O
500,000	O
to	O
develop	O
today	O
in	O
terms	O
of	O
the	O
man-hours	O
required	O
to	O
develop	O
such	O
a	O
codebase	O
.	O
</s>
<s>
By	O
2011	O
it	O
was	O
among	O
the	O
seven	O
most	O
frequently	O
used	O
chess	B-Application
clients	O
to	O
access	O
the	O
Free	O
Internet	O
Chess	B-Application
Server	O
,	O
which	O
in	O
turn	O
is	O
the	O
only	O
non-web-based	O
chess	B-Application
server	O
available	O
for	O
Linux	B-Application
.	O
</s>
<s>
Version	O
0.12	O
of	O
PyChess	B-Language
uses	O
PyGObject	B-Language
and	O
GTK+	O
3	O
,	O
prior	O
versions	O
used	O
the	O
obsoleted	O
PyGTK	B-Language
.	O
</s>
<s>
The	O
current	O
PyChess	B-Language
logo	O
was	O
contributed	O
by	O
Karol	O
Kreński	O
in	O
2007	O
.	O
</s>
<s>
According	O
to	O
the	O
PyChess	B-Language
website	O
:	O
</s>
<s>
The	O
PyChess	B-Language
project	O
puts	O
heavy	O
emphasis	O
on	O
simplicity	O
,	O
trying	O
to	O
avoid	O
the	O
complicated	O
user	B-Application
interfaces	I-Application
of	O
XBoard	B-Application
and	O
BabasChess	O
.	O
</s>
<s>
At	O
the	O
same	O
time	O
the	O
project	O
strives	O
to	O
contain	O
most	O
of	O
the	O
features	O
known	O
from	O
major	O
Windows	O
chess	B-Application
clients	O
such	O
as	O
Chessbase	O
and	O
Aquarium	O
by	O
ChessOK	O
.	O
</s>
