Generating Entertaining Human-Like Sokoban Initial States. - Hans Schaa; Nicolas A. Barriga (SCCC, 2021)

Predicting Solvability and Difficulty of Sokoban Puzzles. - Hans Schaa; Jose A. Del Solar-Zavala; Nicolas A. Barriga (SCCC, 2024)

Evaluating the Expressive Range of Super Mario Bros Level Generators. - Hans Schaa; Nicolas A. Barriga (Algorithms, 2024)

Using search algorithm statistics for assessing maze and puzzle difficulty. - Elio Valenzuela; Hans Schaa; Nicolas A. Barriga; Gustavo Patow (Entertain. Comput., 2025)