<s>
ChessGenius	B-Application
is	O
the	O
name	O
of	O
a	O
chess-playing	B-Application
computer	I-Application
program	I-Application
written	O
by	O
Richard	O
Lang	O
who	O
has	O
in	O
the	O
past	O
written	O
programs	O
that	O
have	O
won	O
the	O
World	O
Computer	B-Application
Chess	I-Application
Championship	O
on	O
10	O
occasions	O
.	O
</s>
<s>
ChessGenius	B-Application
is	O
a	O
continuation	O
of	O
a	O
series	O
of	O
programs	O
(	O
which	O
included	O
various	O
incarnations	O
of	O
the	O
Mephisto	B-General_Concept
program	O
)	O
written	O
by	O
Richard	O
Lang	O
which	O
won	O
the	O
World	O
Microcomputer	O
Chess	B-Application
Championship	O
in	O
1984	O
,	O
1985	O
,	O
1986	O
,	O
1987	O
,	O
1988	O
,	O
1989	O
,	O
1990	O
,	O
1991	O
and	O
1993	O
.	O
</s>
<s>
ChessGenius	B-Application
was	O
the	O
first	O
computer	O
to	O
beat	O
a	O
world	O
champion	O
(	O
Garry	O
Kasparov	O
)	O
at	O
a	O
non-blitz	O
time	O
limit	O
.	O
</s>
<s>
This	O
victory	O
was	O
particularly	O
significant	O
because	O
in	O
contrast	O
to	O
the	O
victory	O
two	O
years	O
later	O
by	O
Deep	B-General_Concept
Blue	I-General_Concept
which	O
was	O
running	O
on	O
very	O
fast	O
custom-built	O
hardware	O
,	O
ChessGenius	B-Application
was	O
running	O
on	O
only	O
an	O
early	O
Pentium	B-General_Concept
PC	B-Device
.	O
</s>
<s>
As	O
well	O
as	O
playing	O
chess	B-Application
,	O
ChessGenius	B-Application
can	O
read	O
games	O
created	O
in	O
.cbf	O
(	O
Chess	B-Application
Base	O
Format	O
)	O
and	O
.pgn	O
(	O
Portable	O
Game	O
Notation	O
)	O
formats	O
and	O
can	O
analyse	O
games	O
assessing	O
the	O
moves	O
played	O
against	O
its	O
own	O
evaluations	O
.	O
</s>
<s>
It	O
is	O
also	O
possible	O
to	O
run	O
other	O
chess	B-Application
engines	I-Application
in	O
the	O
ChessGenius	B-Application
interface	O
.	O
</s>
<s>
The	O
built-in	O
opening	O
book	O
for	O
ChessGenius	B-Application
for	O
Windows	B-Application
was	O
written	O
by	O
a	O
team	O
led	O
by	O
Ossi	O
Weiner	O
.	O
</s>
<s>
In	O
the	O
early	O
1990s	O
ChessGenius	B-Application
was	O
"	O
one	O
of	O
the	O
first	O
master-strength	O
programs	O
"	O
.	O
</s>
<s>
In	O
an	O
article	O
comparing	O
ChessGenius	B-Application
with	O
Fritz	B-Application
in	O
February	O
1994	O
Grandmaster	O
and	O
computer	B-Application
chess	I-Application
expert	O
John	O
Nunn	O
wrote	O
,	O
"[m]y	O
own	O
opinion	O
is	O
that	O
if	O
raw	O
playing	O
strength	O
is	O
your	O
dominant	O
criterion	O
,	O
then	O
go	O
for	O
Genius	O
"	O
.	O
</s>
<s>
ChessGenius	B-Application
,	O
like	O
many	O
of	O
Lang	O
's	O
programs	O
,	O
was	O
famous	O
for	O
having	O
an	O
'	O
asymmetric	O
evaluation	O
function	O
 '	O
which	O
means	O
that	O
moves	O
and	O
sequences	O
of	O
moves	O
might	O
be	O
scored	O
differently	O
depending	O
on	O
whether	O
they	O
are	O
to	O
be	O
made	O
by	O
the	O
program	O
or	O
by	O
the	O
opponent	O
(	O
which	O
has	O
implications	O
for	O
which	O
lines	O
are	O
'	O
forward	O
pruned	O
 '	O
in	O
its	O
calculations	O
)	O
.	O
</s>
<s>
For	O
example	O
,	O
ChessGenius	B-Application
might	O
give	O
a	O
low	O
score	O
to	O
a	O
wild	O
attack	O
of	O
its	O
own	O
and	O
so	O
not	O
calculate	O
it	O
and	O
so	O
not	O
initiate	O
it	O
,	O
but	O
a	O
high	O
score	O
to	O
a	O
wild	O
attack	O
by	O
the	O
opponent	O
and	O
so	O
spend	O
time	O
calculating	O
the	O
implications	O
of	O
such	O
an	O
attack	O
by	O
the	O
opponent	O
,	O
thus	O
making	O
its	O
style	O
of	O
play	O
very	O
'	O
safe	O
 '	O
.	O
</s>
<s>
At	O
the	O
Intel	O
World	O
Chess	B-Application
Grand	O
Prix	O
in	O
London	O
in	O
1994	O
ChessGenius	B-Application
achieved	O
a	O
rating	O
performance	O
for	O
the	O
tournament	O
of	O
2795	O
Elo	O
rating	O
.	O
</s>
<s>
From	O
1994	O
until	O
1998	O
ChessGenius	B-Application
remained	O
one	O
of	O
the	O
top	O
chess	B-Application
programs	I-Application
available	O
.	O
</s>
<s>
In	O
1999	O
ChessGenius	B-Application
dropped	O
out	O
of	O
the	O
top	O
ten	O
on	O
the	O
SSDF	O
(	O
Swedish	O
Chess	B-Application
Computer	I-Application
Association	O
)	O
rating	O
list	O
and	O
it	O
continued	O
to	O
slip	O
down	O
the	O
list	O
over	O
the	O
following	O
decade	O
.	O
</s>
<s>
Portable	O
versions	O
(	O
for	O
example	O
for	O
Palm	O
and	O
the	O
original	O
iPhone	O
)	O
perform	O
exceptionally	O
well	O
because	O
ChessGenius	B-Application
is	O
particularly	O
strong	O
in	O
weak	O
hardware	O
environments	O
.	O
</s>
<s>
Unlike	O
most	O
other	O
commercial	O
vendors	O
,	O
Richard	O
Lang	O
explicitly	O
forbids	O
including	O
the	O
PC	B-Device
version	O
of	O
ChessGenius	B-Application
in	O
chess	B-Application
engine	I-Application
rating	O
lists	O
,	O
so	O
it	O
is	O
difficult	O
to	O
gauge	O
its	O
strength	O
compared	O
to	O
other	O
modern	O
programs	O
.	O
</s>
<s>
The	O
current	O
PC	B-Device
version	O
of	O
ChessGenius	B-Application
(	O
7.2	O
)	O
is	O
marketed	O
as	O
"	O
Classic	O
"	O
because	O
it	O
was	O
the	O
first	O
platform	O
on	O
which	O
the	O
ChessGenius	B-Application
engine	O
appeared	O
.	O
</s>
<s>
This	O
is	O
the	O
famous	O
game	O
from	O
1994	O
in	O
which	O
ChessGenius	B-Application
,	O
playing	O
with	O
the	O
black	O
pieces	O
,	O
defeated	O
the	O
then	O
world	O
champion	O
Garry	O
Kasparov	O
.	O
</s>
<s>
ChessGenius	B-Application
plays	O
fairly	O
well	O
despite	O
making	O
some	O
anti-positional	O
moves	O
which	O
Kasparov	O
was	O
unable	O
to	O
capitalize	O
on.White	O
:	O
Garry	O
Kasparov	O
Black	O
:	O
ChessGenius	B-Application
Opening	O
:	O
ECO	O
D11	O
1	O
.	O
c4	O
c6	O
2	O
.	O
d4	O
d5	O
3	O
.	O
</s>
<s>
As	O
well	O
as	O
PC	B-Device
versions	O
of	O
ChessGenius	B-Application
there	O
are	O
versions	O
available	O
for	O
various	O
mobile	O
devices	O
including	O
mobile	O
phones	O
(	O
such	O
as	O
the	O
Apple	O
iPhone	O
and	O
Android	O
smartphones	O
)	O
and	O
personal	O
organisers	O
.	O
</s>
<s>
Versions	O
include	O
the	O
following	O
:	O
ChessGenius	B-Application
for	O
Desktop	O
PC	B-Device
's	O
(	O
Windows	B-Application
PC	I-Application
's	O
,	O
MS-DOS	B-Application
)	O
,	O
Android	O
,	O
Windows®	B-Application
powered	O
Smartphones	O
(	O
Windows	B-Application
Mobile	O
,	O
Windows	B-Application
Phone	O
8	O
)	O
,	O
iPhone	O
,	O
iPad	O
&	O
iPod	O
touch	O
,	O
Pocket	O
PC	B-Device
,	O
Bada	O
(	O
Samsung	O
)	O
,	O
Palm	O
Computing®	O
Platform	O
(	O
Palm	O
OS	O
)	O
,	O
Symbian	O
Series	O
60	O
phones	O
(	O
Symbian	O
S60	O
and	O
^3	O
phones	O
)	O
,	O
Nokia	O
7650	O
/	O
3650	O
Phone	O
(	O
any	O
phone	O
with	O
Symbian	O
Series	O
60	O
OS	O
like	O
Nokia	O
N-Gage	O
,	O
Siemens	O
SX1	O
,	O
etc	O
.	O
</s>
