<s>
Play	B-Application
Magnus	I-Application
is	O
a	O
commercial	B-Application
computer	B-Application
chess	I-Application
mobile	B-Application
app	I-Application
available	O
for	O
the	O
iOS	B-Application
and	O
Android	B-Application
mobile	I-Application
operating	O
systems	O
.	O
</s>
<s>
The	O
software	O
is	O
named	O
after	O
World	O
Chess	B-Application
Champion	O
Magnus	O
Carlsen	O
and	O
features	O
adjustable	O
difficulty	O
levels	O
for	O
chess	B-Application
players	O
of	O
various	O
skills	O
.	O
</s>
<s>
It	O
has	O
been	O
available	O
since	O
2014	O
and	O
is	O
developed	O
by	O
the	O
Norwegian	O
company	O
Play	B-Application
Magnus	I-Application
AS	O
,	O
which	O
was	O
co-founded	O
by	O
Carlsen	O
.	O
</s>
<s>
The	O
program	O
is	O
a	O
chess	B-Application
engine	I-Application
tuned	O
to	O
play	O
at	O
30	O
different	O
skill	O
levels	O
based	O
on	O
Magnus	O
Carlsen	O
's	O
ability	O
at	O
given	O
ages	O
.	O
</s>
<s>
Users	O
earn	O
points	O
by	O
playing	O
chess	B-Application
,	O
or	O
can	O
purchase	O
points	O
for	O
money	O
.	O
</s>
<s>
After	O
each	O
game	O
,	O
the	O
app	O
gives	O
the	O
user	O
a	O
chance	O
to	O
"	O
share	O
"	O
their	O
result	O
on	O
Facebook	B-Application
or	O
Twitter	B-Application
,	O
or	O
to	O
save	O
the	O
game	O
as	O
PGN	O
.	O
</s>
<s>
The	O
development	O
of	O
Play	B-Application
Magnus	I-Application
began	O
after	O
Carlsen	O
founded	O
Play	B-Application
Magnus	I-Application
AS	O
and	O
invested	O
his	O
own	O
money	O
and	O
funds	O
from	O
investors	O
into	O
the	O
company	O
.	O
</s>
<s>
It	O
was	O
developed	O
by	O
a	O
team	O
including	O
Tord	O
Romstad	O
,	O
one	O
of	O
the	O
creators	O
of	O
Stockfish	B-Application
,	O
who	O
said	O
he	O
based	O
the	O
engine	O
on	O
his	O
Stockfish	B-Application
predecessor	O
"	O
Glaurung	B-Application
"	O
to	O
avoid	O
copyright	O
issues	O
with	O
Stockfish	B-Application
itself	O
.	O
</s>
<s>
Play	B-Application
Magnus	I-Application
was	O
released	O
in	O
January	O
2014	O
for	O
iOS	B-Application
and	O
late	O
2014	O
for	O
Android	B-Application
.	O
</s>
<s>
In	O
August	O
2022	O
,	O
the	O
Play	B-Application
Magnus	I-Application
Group	O
accepted	O
an	O
offer	O
of	O
acquisition	O
from	O
Chess.com,	O
for	O
nearly	O
$83	O
million	O
.	O
</s>
