This document introduces a set of 24 box-constrained numerical global
optimization problem instances, systematically constructed using the
Generalized Numerical Benchmark Generator (GNBG). These instances cover a broad
spectrum of problem features, including varying degrees of modality,
ruggedness, symmetry, conditioning, variable interaction structures, basin
linearity, and deceptiveness. Purposefully designed, this test suite offers
varying difficulty levels and problem characteristics, facilitating rigorous
evaluation and comparative analysis of optimization algorithms. By presenting
these problems, we aim to provide researchers with a structured platform to
assess the strengths and weaknesses of their algorithms against challenges with
known, controlled characteristics. For reproducibility, the MATLAB source code
for this test suite is publicly available