ANN: Dogelog Player 2.1.4 (Railgun CLP)

Dear All,

We are happy to announce a new edition
of the Dogelog Player:

- Enhanced library(compat):
We introduced a new built-in occurs_check/2.
The predicate could be bootstrapped from
unify_with_occurs_check/2 via occurs_check(V,T)
:- \+ unify_with_occurs_check(V, T). But
tapping into the native check gives better performance.

- Enhanced library(math):
We introduced sqrtrem/3 and isqrt/2 built-ins,
for integer square root. The former is a predicate
that also computes a reminder, and the later is
an evaluable predicate, that suppresses the reminder.

- New Railgun CLP:
What began as a sport in December 2025 to explore
a constraint solver that only uses ISO core
standard Prolog. Is now a full project with
iterative milestones. In this release we provide
the basic vocabulary of CLP(FD), and an enhanced
solver that uses min/max based partial consistency.

Have Fun!

Jan Burse, https://www.herbrand.ai/ , 22.01.2026