<s>
CuckooChess	B-Application
is	O
an	O
advanced	O
free	B-License
and	I-License
open-source	I-License
chess	B-Application
engine	I-Application
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
written	O
in	O
Java	B-Language
by	O
Peter	O
Österlund	O
.	O
</s>
<s>
CuckooChess	B-Application
provides	O
an	O
own	O
GUI	B-Application
,	O
and	O
optionally	O
supports	O
the	O
Universal	B-General_Concept
Chess	I-General_Concept
Interface	I-General_Concept
protocol	O
for	O
the	O
use	O
with	O
external	O
GUIs	B-Application
such	O
as	O
Arena	O
.	O
</s>
<s>
An	O
Android	O
port	O
is	O
available	O
,	O
where	O
its	O
GUI	B-Application
is	O
also	O
based	O
on	O
Peter	O
Österlund	O
's	O
Stockfish	B-Application
port	O
dubbed	O
DroidFish	O
.	O
</s>
<s>
The	O
program	O
uses	O
the	O
Chess	B-Application
Cases	O
chess	B-Application
font	O
,	O
created	O
by	O
Matthieu	O
Leschemelle	O
.	O
</s>
<s>
The	O
name	O
CuckooChess	B-Application
comes	O
due	O
that	O
the	O
transposition	O
table	O
is	O
based	O
on	O
Cuckoo	B-Algorithm
hashing	I-Algorithm
.	O
</s>
<s>
Android	O
app	O
based	O
chess	B-Application
gaming	O
app	O
Droidfish	O
employs	O
both	O
CuckooChess	B-Application
and	O
Stockfish	B-Application
chess	I-Application
engines	I-Application
.	O
</s>
<s>
Similarly	O
,	O
Kickstarter	O
funded	O
AI	B-Application
based	O
virtual	O
reality	O
chess	B-Application
game	O
Square	O
Off	O
also	O
uses	O
CuckooChess	B-Application
engine	O
.	O
</s>
<s>
It	O
has	O
an	O
ELO	O
rating	O
of	O
2583	O
(	O
as	O
of	O
July	O
2018	O
)	O
and	O
a	O
rank	O
of	O
135‑137	O
in	O
the	O
Computer	B-Application
Chess	I-Application
Rating	O
List	O
.	O
</s>
