The first IRF engine, named in honor of Ferdinand Maack. Maackesgeist v1 searches to a fixed depth of [N] plies with a material-weighted evaluation function. It plays at the Weak and Intermediate difficulty settings and is recommended for players new to three-dimensional chess who want an opponent that does not overwhelm before the spatial geometry becomes intuitive.
A substantially revised successor to v1, adding mobility and king-safety terms to the evaluation and extending the effective search depth through improved move ordering and null-move pruning. Maackesgeist v2 operates at all three difficulty levels, with its Strong setting providing a meaningful challenge for experienced players.
Raumcapa is a principles-based influence engine that does not include search beyond one ply. This engine applies the style of José Raúl Capablanca to Raumschach.