<s>
Chequered	B-Application
Flag	I-Application
is	O
a	O
racing	O
video	O
game	O
developed	O
by	O
Psion	B-Application
Software	I-Application
and	O
published	O
by	O
Sinclair	O
Research	O
in	O
1983	O
.	O
</s>
<s>
It	O
was	O
the	O
first	O
driving	O
game	O
published	O
for	O
the	O
ZX	B-Operating_System
Spectrum	I-Operating_System
and	O
one	O
of	O
the	O
first	O
computer	O
car	B-Application
simulators	I-Application
.	O
</s>
<s>
Chequered	B-Application
Flag	I-Application
allows	O
a	O
player	O
to	O
select	O
a	O
racing	O
track	O
and	O
one	O
of	O
three	O
cars	O
;	O
two	O
with	O
manual	O
gears	O
and	O
one	O
automatic	O
.	O
</s>
<s>
Sinclair	O
User	O
said	O
it	O
was	O
up	O
to	O
the	O
usual	O
Psion	B-Application
standards	O
,	O
and	O
that	O
"	O
the	O
quality	O
of	O
the	O
game	O
and	O
the	O
detail	O
included	O
make	O
it	O
one	O
of	O
the	O
great	O
games	O
for	O
the	O
Spectrum.	O
"	O
</s>
<s>
In	O
their	O
1990	O
retrospective	O
of	O
driving	O
games	O
,	O
Your	O
Sinclair	O
also	O
lamented	O
the	O
lack	O
of	O
other	O
racers	O
,	O
describing	O
the	O
game	O
as	O
"	O
a	O
bit	O
like	O
Pole	B-Application
Position	I-Application
without	O
any	O
other	O
cars	O
to	O
race	O
against.	O
"	O
</s>
<s>
The	O
game	O
reached	O
number	O
one	O
in	O
the	O
UK	O
sales	O
charts	O
,	O
ahead	O
of	O
Manic	B-Application
Miner	I-Application
,	O
and	O
being	O
replaced	O
by	O
Jet	B-Application
Set	I-Application
Willy	I-Application
.	O
</s>
