 Compass is a new Monte Carlo, MC, engine design specifically for boron neutron capture therapy, BNCT, dose calculations. It is faster than existing general-purpose MC codes such as MCNP due to its optimized algorithms and parallel computing capabilities. The comparison between Compass and MCNP shows that the dose distributions from Compass are in good agreement with those from MCNP, while the computational efficiency of Compass is better than MCNP. This demonstrates that Compass can be used to quickly generate accurate dose distributions for BNCT treatments. This article was authored by WAN Bingxiang, Jiang Chen, Yi Chiaotong, and others.