NACRE (Nogood And Clause Reasoning Engine) is a constraint solver written in C++. The main purpose of this solver is to experiment nogood recording (with a clause reasoning engine) in Constraint Programming (CP). In particular, the data structures of the solver have been carefully designed to play around nogoods and clauses. This is the first version of the solver and it has been submitted to the XCSP3 2018 competition under the CSP MiniTrack.

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