<s>
MChess	B-Application
Pro	I-Application
is	O
the	O
name	O
given	O
to	O
a	O
chess	B-Application
playing	O
computer	O
program	O
written	O
by	O
Marty	O
Hirsch	O
which	O
won	O
the	O
World	O
Microcomputer	O
Chess	B-Application
Championship	O
in	O
1995	O
.	O
</s>
<s>
The	O
versions	O
of	O
MChess	B-Application
Pro	I-Application
which	O
appear	O
on	O
the	O
historical	O
and	O
current	O
SSDF	O
ratings	O
lists	O
include	O
3.12	O
,	O
3.5	O
,	O
4.0	O
,	O
5.0	O
,	O
6.0	O
,	O
7.1	O
,	O
and	O
8.0	O
.	O
</s>
<s>
MChess	B-Application
Pro	I-Application
has	O
its	O
own	O
DOS	O
GUI	O
and	O
as	O
well	O
as	O
playing	O
chess	B-Application
is	O
able	O
to	O
analyse	O
EPD	O
(	O
Extended	O
Position	O
Description	O
)	O
files	O
.	O
</s>
<s>
MChess	B-Application
Pro	I-Application
's	O
style	O
of	O
play	O
is	O
designed	O
to	O
be	O
particularly	O
human	O
,	O
and	O
,	O
more	O
specifically	O
,	O
particularly	O
positional	O
.	O
</s>
<s>
MChess	B-Application
Pro	I-Application
uses	O
'	O
complex	O
pattern	O
recognition	O
 '	O
,	O
has	O
an	O
evaluation	O
function	O
designed	O
to	O
focus	O
on	O
positional	O
factors	O
,	O
and	O
uses	O
aggressive	O
variation	O
pruning	O
in	O
its	O
searches	O
.	O
</s>
<s>
MChess	B-Application
Pro	I-Application
was	O
one	O
of	O
the	O
strongest	O
chess	B-Application
programs	I-Application
of	O
the	O
1990s	O
.	O
</s>
<s>
MChess	B-Application
Pro	I-Application
finished	O
8th	O
and	O
was	O
the	O
highest	O
placed	O
computer	O
in	O
the	O
1991	O
AEGON	O
Man-Machine	O
tournament	O
.	O
</s>
<s>
In	O
the	O
10th	O
AEGON	O
event	O
at	O
the	O
Hague	O
in	O
1995	O
,	O
MChess	B-Application
Pro	I-Application
defeated	O
three	O
grandmasters	O
and	O
achieved	O
a	O
performance	O
rating	O
of	O
2652	O
Elo	O
.	O
</s>
<s>
MChess	B-Application
Pro	I-Application
has	O
defeated	O
a	O
number	O
of	O
very	O
strong	O
players	O
including	O
Christiansen	O
,	O
Z	O
.	O
Polgar	O
,	O
Rohde	O
,	O
Shabalov	O
,	O
Cifuentes	O
and	O
Wolff	O
.	O
</s>
<s>
By	O
the	O
end	O
of	O
the	O
1990s	O
MChess	B-Application
Pro	I-Application
was	O
slipping	O
further	O
down	O
the	O
SSDF	O
(	O
Swedish	O
Chess	B-Application
Computer	I-Application
Association	O
)	O
rating	O
lists	O
and	O
by	O
2001	O
was	O
already	O
outside	O
the	O
top	O
30	O
programs	O
.	O
</s>
<s>
This	O
game	O
from	O
1995	O
sees	O
MChess	B-Application
Pro	I-Application
defeating	O
one	O
of	O
the	O
strongest	O
female	O
players	O
of	O
the	O
20th	O
Century	O
-	O
Grandmaster	O
Zsuzsa	O
Polgar	O
.	O
</s>
<s>
MChess	B-Application
Pro	I-Application
handles	O
this	O
endgame	O
fairly	O
well	O
.	O
</s>
