<s>
Master	O
is	O
a	O
version	O
of	O
DeepMind	B-Application
's	O
Go	B-Application
software	I-Application
AlphaGo	B-Application
,	O
named	O
after	O
the	O
account	O
name	O
(	O
originally	O
Magister/Magist	O
)	O
used	O
online	O
,	O
which	O
won	O
60	O
straight	O
online	O
games	O
against	O
human	O
professional	O
Go	O
players	O
from	O
29	O
December	O
2016	O
to	O
4	O
January	O
2017	O
.	O
</s>
<s>
This	O
version	O
was	O
also	O
used	O
in	O
the	O
Future	B-Application
of	I-Application
Go	I-Application
Summit	I-Application
in	O
May	O
2017	O
.	O
</s>
<s>
It	O
used	O
four	O
TPUs	B-Device
on	O
a	O
single	O
machine	O
with	O
Elo	O
rating	O
4,858	O
.	O
</s>
<s>
DeepMind	B-Application
claimed	O
that	O
AlphaGo	B-Application
Master	I-Application
was	O
3-stone	O
stronger	O
than	O
the	O
version	O
used	O
in	O
AlphaGo	B-Application
v	I-Application
.	I-Application
Lee	I-Application
Sedol	I-Application
.	O
</s>
<s>
DeepMind	B-Application
released	O
a	O
version	O
of	O
AlphaGo	B-Application
Master	I-Application
in	O
December	O
2017	O
that	O
serves	O
as	O
a	O
teaching	O
tool	O
analyzing	O
the	O
win	O
rates	O
of	O
6,000	O
Go	O
openings	O
from	O
230,000	O
human	O
games	O
.	O
</s>
<s>
The	O
software	O
was	O
first	O
used	O
to	O
play	O
games	O
against	O
professional	O
players	O
on	O
29	O
December	O
2016	O
on	O
the	O
Tygem	B-Application
Go	O
server	O
,	O
under	O
the	O
account	O
name	O
'	O
Magister	O
 '	O
(	O
shown	O
as	O
'	O
Magist	B-Application
 '	O
at	O
the	O
server	O
's	O
Chinese	O
version	O
)	O
.	O
</s>
<s>
After	O
playing	O
30	O
games	O
on	O
Tygem	B-Application
,	O
it	O
was	O
moved	O
to	O
the	O
FoxGo	O
server	O
on	O
1	O
January	O
2017	O
.	O
</s>
<s>
After	O
winning	O
its	O
59th	O
game	O
it	O
was	O
revealed	O
in	O
the	O
chatroom	O
that	O
Master	O
was	O
controlled	O
by	O
Aja	O
Huang	O
of	O
the	O
DeepMind	B-Application
team	O
.	O
</s>
<s>
On	O
4	O
January	O
2017	O
,	O
after	O
these	O
games	O
were	O
completed	O
,	O
Demis	O
Hassabis	O
,	O
the	O
co-founder	O
of	O
DeepMind	B-Application
,	O
confirmed	O
that	O
Magister	O
and	O
Master	O
both	O
played	O
using	O
an	O
updated	O
version	O
of	O
AlphaGo	B-Application
and	O
said	O
,	O
"	O
We	O
're	O
looking	O
forward	O
to	O
playing	O
some	O
official	O
,	O
full-length	O
games	O
later	O
[	O
in	O
2017 ]	O
in	O
collaboration	O
with	O
Go	O
organizations	O
and	O
experts	O
"	O
.	O
</s>
<s>
However	O
,	O
no	O
one	O
took	O
the	O
bounty	O
since	O
Master	O
's	O
final	O
online	O
record	O
was	O
60	O
wins	O
and	O
0	O
losses	O
,	O
including	O
three	O
victories	O
over	O
Go	O
's	O
top	O
ranked	O
player	O
,	O
Ke	O
Jie	O
,	O
who	O
had	O
been	O
quietly	O
briefed	O
in	O
advance	O
that	O
Master	O
was	O
a	O
version	O
of	O
AlphaGo	B-Application
.	O
</s>
<s>
The	O
Master	O
version	O
also	O
participated	O
in	O
the	O
Future	B-Application
of	I-Application
Go	I-Application
summit	I-Application
in	O
May	O
2017	O
.	O
</s>
<s>
It	O
defeated	O
Ke	O
Jie	O
in	O
a	O
three-game	B-Application
match	I-Application
by	O
three	O
to	O
zero	O
and	O
beat	O
a	O
human	O
team	O
with	O
five	O
top	O
Go	O
professionals	O
.	O
</s>
<s>
On	O
20	O
January	O
2017	O
,	O
DeepMind	B-Application
team	O
members	O
Fan	O
Hui	O
and	O
Aja	O
Huang	O
disclosed	O
that	O
Master	O
's	O
operator	O
accidentally	O
entered	O
a	O
move	O
other	O
than	O
AlphaGo	B-Application
's	O
choice	O
in	O
two	O
situations	O
during	O
the	O
online	O
games	O
.	O
</s>
