The engines listed here are AI opponents purpose-built for Raumschach. Each employs
iterative-deepening alpha-beta search with quiescence and a transposition table tuned
to the geometry of the 5×5×5 board. They differ primarily in their
evaluation functions and search depth, offering a range of challenge from introductory
to advanced play. All engines are available directly within the IRF game clients
and require no installation.
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Maackesgeist, v1
(2026)
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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.
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Maackesgeist, v2
(2026)
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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.
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Raumfischer, v1
(2026)
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An independent engine contributed to the IRF. Raumfischer employs a distinct
evaluation architecture with particular attention to unicorn mobility and long
diagonal control across all five levels. Its playing style tends toward
positional, space-claiming strategies, offering a different tactical character
from Maackesgeist for players wishing to study contrasting approaches.