<s>
Chess.com	B-Application
is	O
an	O
internet	B-Application
chess	I-Application
server	I-Application
,	O
news	O
website	O
and	O
social	O
networking	O
website	O
.	O
</s>
<s>
Live	O
online	B-Application
chess	I-Application
can	O
be	O
played	O
against	O
other	O
users	O
in	O
daily	O
,	O
rapid	O
,	O
blitz	O
or	O
bullet	O
time	O
controls	O
,	O
with	O
a	O
number	O
of	O
chess	B-Application
variants	O
also	O
available	O
.	O
</s>
<s>
Chess	B-Application
versus	O
a	O
chess	B-Application
engine	I-Application
,	O
computer	O
analysis	O
,	O
chess	B-Application
puzzles	O
and	O
teaching	O
resources	O
are	O
also	O
offered	O
.	O
</s>
<s>
One	O
of	O
the	O
largest	O
chess	B-Application
platforms	O
in	O
the	O
world	O
,	O
with	O
achieving	O
the	O
milestone	O
of	O
100	O
million	O
users	O
on	O
December	O
16	O
,	O
2022	O
,	O
Chess.com	B-Application
has	O
hosted	O
online	O
tournaments	O
including	O
Titled	O
Tuesdays	O
,	O
the	O
PRO	O
Chess	B-Application
League	O
,	O
the	O
Speed	O
Chess	B-Application
Championships	O
,	O
PogChamps	O
,	O
Online	B-Application
Chess	I-Application
Olympiads	O
and	O
computer	B-Application
vs.	I-Application
computer	I-Application
events	O
.	O
</s>
<s>
The	O
domain	O
Chess.com	B-Application
was	O
originally	O
set	O
up	O
in	O
1995	O
by	O
Aficionado	O
,	O
a	O
company	O
based	O
in	O
Berkeley	O
,	O
California	O
,	O
to	O
sell	O
a	O
piece	O
of	O
chess	B-Application
tutoring	O
software	O
called	O
"	O
Chess	B-Application
Mentor	O
"	O
.	O
</s>
<s>
Then	O
,	O
in	O
2005	O
,	O
Internet	O
entrepreneur	O
Erik	B-Application
Allebest	I-Application
and	O
partner	O
Jarom	O
(	O
"	O
Jay	O
"	O
)	O
Severson	O
,	O
who	O
met	O
as	O
undergraduate	O
students	O
at	O
Brigham	O
Young	O
University	O
,	O
bought	O
the	O
domain	O
name	O
and	O
assembled	O
a	O
team	O
of	O
software	O
developers	O
,	O
redeveloping	O
the	O
site	O
as	O
a	O
chess	B-Application
portal	O
.	O
</s>
<s>
Two	O
years	O
later	O
,	O
Chess.com	B-Application
acquired	O
a	O
similar	O
chess	B-Application
social	O
networking	O
site	O
,	O
chesspark.com	O
.	O
</s>
<s>
In	O
October	O
2013	O
,	O
Chess.com	B-Application
acquired	O
the	O
Amsterdam-based	O
chess	B-Application
news	O
site	O
chessvibes.com	B-Application
as	O
well	O
.	O
</s>
<s>
This	O
news	O
site	O
,	O
founded	O
and	O
operated	O
by	O
Dutch	O
chess	B-Application
journalist	O
Peter	O
Doggers	O
,	O
continued	O
to	O
cover	O
chess	B-Application
tournaments	O
in	O
a	O
digital	O
setting	O
.	O
</s>
<s>
In	O
January	O
2016	O
,	O
Chess.com	B-Application
announced	O
a	O
two-year	O
overhaul	O
of	O
its	O
previous	O
interface	O
(	O
titled	O
'	O
v3	O
 '	O
)	O
.	O
</s>
<s>
The	O
site	O
introduced	O
new	O
features	O
including	O
computer	O
analysis	O
of	O
games	O
,	O
and	O
the	O
chess	B-Application
variants	O
of	O
crazyhouse	O
,	O
three-check	O
chess	B-Application
,	O
king	O
of	O
the	O
hill	O
,	O
chess960	O
and	O
bughouse	O
.	O
</s>
<s>
Chess.com	B-Application
reached	O
another	O
milestone	O
in	O
June	O
2017	O
,	O
as	O
the	O
2,147,483,647	O
th	O
(=	O
231-1	O
)	O
game	O
was	O
played	O
,	O
which	O
caused	O
the	O
iOS	B-Application
app	O
to	O
stop	O
working	O
for	O
those	O
with	O
32-bit	O
Apple	B-Operating_System
devices	I-Operating_System
.	O
</s>
<s>
This	O
occurred	O
because	O
of	O
an	O
integer	B-Error_Name
overflow	I-Error_Name
problem	O
whereby	O
the	O
number	O
was	O
too	O
large	O
to	O
be	O
represented	O
in	O
the	O
number	O
of	O
storage	O
bits	O
that	O
were	O
used	O
.	O
</s>
<s>
In	O
May	O
2018	O
,	O
Chess.com	B-Application
acquired	O
the	O
3300+	O
Elo-rated	O
commercial	O
chess	B-Application
engine	I-Application
Komodo	B-Application
,	O
which	O
ranked	O
3rd	O
behind	O
Stockfish	B-Application
and	O
Houdini	B-Application
at	O
the	O
time	O
of	O
acquisition	O
.	O
</s>
<s>
In	O
conjunction	O
,	O
the	O
Komodo	B-Application
team	O
announced	O
the	O
addition	O
of	O
the	O
probabilistic	O
method	O
of	O
Monte	B-Application
Carlo	I-Application
tree	I-Application
search	I-Application
machine	O
learning	O
,	O
the	O
same	O
methods	O
used	O
by	O
the	O
recent	O
chess	B-Application
projects	O
AlphaZero	B-Application
and	O
Leela	B-Application
Chess	I-Application
Zero	I-Application
.	O
</s>
<s>
In	O
November	O
2020	O
,	O
Chess.com	B-Application
acquired	O
the	O
rights	O
to	O
broadcast	O
the	O
World	O
Chess	B-Application
Championship	O
2021	O
,	O
which	O
is	O
broadcast	O
on	O
live	O
streaming	O
platform	O
Twitch	O
.	O
</s>
<s>
In	O
response	O
to	O
the	O
Russia-Ukraine	O
crisis	O
of	O
2022	O
,	O
Chess.com	B-Application
published	O
two	O
articles	O
that	O
were	O
critical	O
of	O
the	O
2022	O
Russian	O
invasion	O
of	O
Ukraine	O
,	O
and	O
replaced	O
Russian	O
flags	O
with	O
a	O
link	O
to	O
these	O
articles	O
.	O
</s>
<s>
In	O
retaliation	O
,	O
Chess.com	B-Application
was	O
blocked	O
in	O
Russia	O
.	O
</s>
<s>
In	O
September	O
2022	O
,	O
Chess.com	B-Application
was	O
caught	O
in	O
the	O
furor	O
of	O
a	O
controversy	O
regarding	O
cheating	O
in	O
professional	O
chess	B-Application
games	O
.	O
</s>
<s>
Leaked	O
emails	O
revealed	O
that	O
some	O
people	O
cheated	O
on	O
the	O
Chess.com	B-Application
platform	O
in	O
games	O
involving	O
prize	O
money	O
and	O
that	O
Chess.com	B-Application
removed	O
some	O
players	O
 '	O
accounts	O
,	O
including	O
grandmaster	O
Maxim	O
Dlugy	O
,	O
who	O
had	O
been	O
found	O
to	O
be	O
cheating	O
.	O
</s>
<s>
In	O
November	O
2022	O
,	O
The	O
Chess.com	B-Application
Global	O
Championship	O
was	O
inaugurated	O
with	O
a	O
$	O
1,000,000	O
prize	O
pool	O
.	O
</s>
<s>
Wesley	O
So	O
became	O
the	O
first	O
Chess.com	B-Application
Global	O
Champion	O
,	O
defeating	O
Nihal	O
Sarin	O
in	O
the	O
finals	O
with	O
a	O
match	O
score	O
of	O
4.5-1.5	O
.	O
</s>
<s>
In	O
its	O
latest	O
record	O
,	O
Chess.com	B-Application
is	O
announced	O
it	O
had	O
over	O
100,000,000	O
members	O
in	O
December	O
2022	O
.	O
</s>
<s>
In	O
January	O
2023	O
,	O
Chess.com	B-Application
added	O
in	O
five	O
new	O
"	O
cat	O
"	O
chessbots	O
,	O
including	O
Mittens	O
.	O
</s>
<s>
Recently	O
,	O
due	O
to	O
the	O
surge	O
in	O
popularity	O
of	O
Chess	B-Application
,	O
their	O
databases	O
have	O
been	O
crashing	O
.	O
</s>
<s>
Chess.com	B-Application
operates	O
a	O
freemium	O
business	O
model	O
:	O
main	O
site	O
features	O
are	O
free	O
but	O
others	O
are	O
limited	O
or	O
unavailable	O
in	O
some	O
respects	O
until	O
a	O
subscription	O
is	O
paid	O
.	O
</s>
<s>
Chess.com	B-Application
as	O
a	O
freemium	O
model	O
has	O
three	O
different	O
subscriptions	O
,	O
each	O
offering	O
more	O
usage	O
of	O
the	O
services	O
they	O
provide	O
.	O
</s>
<s>
Users	O
can	O
play	O
in	O
many	O
different	O
time	O
controls	O
which	O
are	O
grouped	O
into	O
Rapid	O
,	O
Blitz	O
,	O
Bullet	O
,	O
and	O
Daily	O
(	O
correspondence	O
chess	B-Application
)	O
.	O
</s>
<s>
Users	O
can	O
play	O
a	O
number	O
of	O
popular	O
chess	B-Application
variants	O
on	O
the	O
live	O
server	O
,	O
including	O
crazyhouse	O
,	O
three-check	O
,	O
four-player	O
,	O
King	O
of	O
the	O
Hill	O
,	O
chess960	O
,	O
atomic	O
,	O
Racing	O
Kings	O
,	O
Duck	O
Chess	B-Application
and	O
bughouse	O
.	O
</s>
<s>
Vote	O
chess	B-Application
is	O
played	O
between	O
two	O
teams	O
of	O
players	O
on	O
Chess.com	B-Application
.	O
</s>
<s>
Chess.com	B-Application
allows	O
the	O
player	O
to	O
play	O
against	O
a	O
computer	O
.	O
</s>
<s>
Along	O
with	O
a	O
standard	O
computer	O
,	O
there	O
are	O
many	O
other	O
computers	O
representing	O
popular	O
streamers	O
and	O
world-class	O
chess	B-Application
players	O
.	O
</s>
<s>
Chess.com	B-Application
has	O
a	O
database	O
of	O
manually	O
created	O
puzzles	O
(	O
Unlike	O
game-extracted	O
puzzles	O
of	O
Lichess	O
)	O
.	O
</s>
<s>
Chess.com	B-Application
has	O
a	O
unique	O
feature	O
of	O
lessons	O
.	O
</s>
<s>
Contributors	O
can	O
create	O
lessons	O
but	O
some	O
are	O
created	O
by	O
the	O
core	O
chess.com	B-Application
team	O
.	O
</s>
<s>
Chess.com	B-Application
also	O
has	O
a	O
news	O
section	O
in	O
which	O
reporters	O
post	O
reports	O
of	O
major	O
chess	B-Application
tournaments	O
around	O
the	O
world	O
as	O
well	O
as	O
the	O
results	O
of	O
major	O
chess.com	B-Application
tournaments	O
such	O
as	O
the	O
Speed	O
Chess	B-Application
Championship	O
.	O
</s>
<s>
Additional	O
features	O
include	O
chess	B-Application
forums	O
,	O
articles	O
,	O
downloads	O
,	O
opening	O
databases	O
,	O
teams	O
,	O
live	O
broadcasts	O
,	O
online	O
coaching	O
and	O
a	O
game	O
database	O
of	O
over	O
2	O
million	O
games	O
.	O
</s>
<s>
The	O
company	O
publishes	O
a	O
large	O
number	O
of	O
articles	O
on	O
a	O
variety	O
of	O
chess-related	O
topics	O
,	O
including	O
chess	B-Application
strategy	O
,	O
opening	O
theory	O
and	O
history	O
.	O
</s>
<s>
Chess.com	B-Application
has	O
a	O
policy	O
against	O
the	O
use	O
of	O
chess	B-Application
engines	I-Application
in	O
all	O
forms	O
of	O
the	O
game	O
,	O
except	O
where	O
"	O
specifically	O
permitted	O
(	O
such	O
as	O
a	O
computer	O
tournament	O
)	O
"	O
.	O
</s>
<s>
Chess.com	B-Application
also	O
runs	O
the	O
subsidiary	O
site	O
chesskid.com	O
for	O
chess	B-Application
players	O
of	O
all	O
ages	O
.	O
</s>
<s>
ChessKid	O
focuses	O
on	O
a	O
child-friendly	O
environment	O
aimed	O
towards	O
chess	B-Application
improvement	O
for	O
beginners	O
to	O
club	O
players	O
.	O
</s>
<s>
ChessKid.com	O
has	O
run	O
a	O
yearly	O
online	O
championship	O
called	O
CONIC	O
(	O
the	O
ChessKid	O
Online	O
National	O
Invitational	O
Championship	O
)	O
,	O
since	O
2012	O
which	O
is	O
recognized	O
by	O
the	O
United	O
States	O
Chess	B-Application
Federation	O
.	O
</s>
<s>
ChessKid	O
has	O
made	O
agreements	O
and	O
partnerships	O
with	O
chess	B-Application
associations	O
to	O
bring	O
the	O
educational	O
benefit	O
of	O
chess	B-Application
to	O
children	O
in	O
schools	O
.	O
</s>
<s>
In	O
2014	O
,	O
for	O
a	O
trial	O
period	O
,	O
all	O
signups	O
to	O
the	O
ICA	O
(	O
Illinois	O
Chess	B-Application
Association	O
)	O
included	O
a	O
free	O
gold	O
member	O
subscription	O
to	O
ChessKid	O
.	O
</s>
<s>
They	O
also	O
have	O
a	O
long-term	O
partnership	O
with	O
the	O
NTCA	O
(	O
North	O
Texas	O
Chess	B-Application
Academy	O
)	O
which	O
gives	O
children	O
access	O
to	O
online	O
instructors	O
.	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
to	O
be	O
acquired	O
by	O
Chess.com	B-Application
at	O
a	O
value	O
of	O
800	O
million	O
kr	O
(	O
US$80	O
million	O
)	O
.	O
</s>
<s>
The	O
Play	B-Application
Magnus	I-Application
Group	O
owns	O
brands	O
and	O
businesses	O
including	O
the	O
chess	B-Application
server	I-Application
chess24	O
,	O
the	O
mobile	O
app	O
Play	B-Application
Magnus	I-Application
,	O
the	O
Champions	O
Chess	B-Application
Tour	O
,	O
and	O
the	O
chess	B-Application
improvement	O
website	O
Chessable	O
.	O
</s>
<s>
According	O
to	O
Dot	O
Esports	O
,	O
the	O
Play	B-Application
Magnus	I-Application
Group	O
was	O
unable	O
to	O
make	O
a	O
"	O
sustainable	O
profit	O
"	O
on	O
anything	O
but	O
Chessable	O
,	O
and	O
the	O
merge	O
left	O
"	O
no	O
other	O
realistic	O
chess	B-Application
competitor	O
"	O
except	O
the	O
free	O
,	O
open-source	O
Lichess	O
.	O
</s>
<s>
Chess.com	B-Application
has	O
held	O
the	O
Speed	O
Chess	B-Application
Championship	O
annually	O
since	O
2016	O
,	O
involving	O
a	O
single-elimination	O
tournament	O
featuring	O
some	O
of	O
the	O
world	O
's	O
best	O
players	O
.	O
</s>
<s>
The	O
USCL	O
was	O
a	O
nationwide	O
national	O
chess	B-Application
league	O
in	O
the	O
United	O
States	O
between	O
2005	O
and	O
2016	O
.	O
</s>
<s>
Chess.com	B-Application
hosted	O
the	O
event	O
in	O
2013	O
.	O
</s>
<s>
The	O
PRO	O
Chess	B-Application
League	O
was	O
the	O
result	O
of	O
the	O
US	O
Chess	B-Application
League	O
changing	O
its	O
name	O
and	O
format	O
,	O
with	O
faster	O
time	O
controls	O
and	O
a	O
focus	O
on	O
the	O
flexibility	O
of	O
forming	O
and	O
managing	O
teams	O
.	O
</s>
<s>
Chess.com	B-Application
has	O
hosted	O
the	O
PCL	O
twice	O
starting	O
in	O
2017	O
,	O
having	O
a	O
regular	O
and	O
a	O
summer	O
series	O
.	O
</s>
<s>
Titled	O
Tuesday	O
is	O
an	O
11-round	O
Swiss-system	O
3+1	O
blitz	O
chess	B-Application
tournament	O
held	O
on	O
every	O
Tuesday	O
.	O
</s>
<s>
In	O
June	O
2018	O
,	O
Chess.com	B-Application
held	O
a	O
special	O
version	O
of	O
the	O
tournament	O
for	O
which	O
the	O
winner	O
would	O
go	O
on	O
to	O
participate	O
in	O
the	O
Isle	O
of	O
Man	O
International	O
which	O
had	O
a	O
prize	O
fund	O
of	O
£	O
144,000	O
.	O
</s>
<s>
In	O
November	O
2017	O
,	O
Chess.com	B-Application
held	O
an	O
open	O
tournament	O
,	O
called	O
the	O
Chess.com	B-Application
Computer	B-Application
Chess	I-Application
Championship	O
(	O
CCCC	O
,	O
later	O
CCC	O
)	O
,	O
with	O
the	O
ten	O
strongest	O
chess	B-Application
engines	I-Application
,	O
with	O
$	O
2,500	O
in	O
prize	O
money	O
.	O
</s>
<s>
The	O
top-two	O
engines	O
competed	O
in	O
a	O
"	O
Superfinale	O
"	O
tournament	O
between	O
the	O
two	O
finalists	O
-	O
Stockfish	B-Application
and	O
Houdini	B-Application
.	O
</s>
<s>
In	O
the	O
20-game	O
Superfinal	O
,	O
Stockfish	B-Application
won	O
over	O
Houdini	B-Application
with	O
a	O
score	O
10.5-9.5	O
.	O
</s>
<s>
Of	O
the	O
decisive	O
games	O
,	O
three	O
games	O
were	O
won	O
by	O
Stockfish	B-Application
,	O
and	O
two	O
by	O
Houdini	B-Application
.	O
</s>
<s>
In	O
August	O
2018	O
,	O
the	O
site	O
announced	O
that	O
the	O
Chess.com	B-Application
Computer	B-Application
Chess	I-Application
Championship	O
has	O
returned	O
,	O
this	O
time	O
as	O
a	O
non-stop	O
tournament	O
for	O
chess	B-Application
engines	I-Application
.	O
</s>
<s>
+Main	O
Events	O
Event	O
Year	O
Time	O
Controls	O
Winner	O
Runner-up	O
Ref	O
Computer	B-Application
Chess	I-Application
Championship	O
2017	O
15+2	O
Stockfish	B-Application
(	O
1	O
)	O
Houdini	B-Application
CCC	O
1	O
:	O
Rapid	O
Rumble	O
2018	O
15+5	O
Stockfish	B-Application
(	O
2	O
)	O
Houdini	B-Application
CCC	O
2	O
:	O
Blitz	O
Battle	O
2018	O
5+2	O
Stockfish	B-Application
(	O
3	O
)	O
Komodo	B-Application
CCC	O
3	O
:	O
Rapid	O
Redux	O
2019	O
30+5	O
Stockfish	B-Application
(	O
4	O
)	O
Leela	B-Application
Chess	I-Application
Zero	I-Application
CCC	O
4	O
:	O
Bullet	O
Brawl	O
2019	O
1+2	O
Stockfish	B-Application
(	O
5	O
)	O
Leela	B-Application
Chess	I-Application
Zero	I-Application
CCC	O
5	O
:	O
Escalation	O
2019	O
10+5	O
Stockfish	B-Application
(	O
6	O
)	O
Leela	B-Application
Chess	I-Application
Zero	I-Application
https://cccfiles.chess.com/archive/tournament-18208.pgn	O
CCC	O
6	O
:	O
Winter	O
Classic	O
2019	O
10+10	O
Stockfish	B-Application
(	O
7	O
)	O
Leela	B-Application
Chess	I-Application
Zero	I-Application
CCC	O
7	O
:	O
Blitz	O
Bonanza	O
2019	O
5+2	O
Leela	B-Application
Chess	I-Application
Zero	I-Application
(	O
1	O
)	O
Stockfish	B-Application
CCC	O
8	O
:	O
Deep	O
Dive	O
2019	O
15+5	O
Stockfish	B-Application
(	O
8	O
)	O
Leela	B-Application
Chess	I-Application
Zero	I-Application
CCC	O
9	O
:	O
The	O
Gauntlet	O
2019	O
5+2	O
,	O
10+5	O
Stockfish	B-Application
(	O
9	O
)	O
Leelenstein	O
CCC	O
10	O
:	O
Double	O
Digits	O
2019	O
10+3	O
Leelenstein	O
(	O
1	O
)	O
Stockfish	B-Application
CCC	O
11	O
2019	O
30+5	O
Leela	B-Application
Chess	I-Application
Zero	I-Application
(	O
2	O
)	O
Stockfish	B-Application
CCC	O
12	O
:	O
Bullet	O
Madness	O
!	O
</s>
<s>
Chess.com	B-Application
has	O
hosted	O
PogChamps	O
,	O
an	O
amateur	O
online	O
tournament	O
featuring	O
Twitch	O
streamers	O
,	O
since	O
2020	O
.	O
</s>
