Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nmbr9 as a Constraint Programming Challenge   Modern board games are a rich source of interesting and new challenges for
combinatorial problems. The game Nmbr9 is a solitaire style puzzle game using
polyominoes. The rules of the game are simple to explain, but modelling the
game effectively using constraint programming is hard. This abstract presents
the game, contributes new generalized variants of the game suitable for
benchmarking and testing, and describes a model for the presented variants. The
question of the top possible score in the standard game is an open challenge.

34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn