This study examines the complex relationships between intelligence, creativity, and working memory providing a detailed understanding of their intricate relationships. A sample of 88 young adults completed a series of cognitive assessments, including the Corsi Block-Tapping Test (CBTT) for visuospatial working memory, Raven’s Advanced Progressive Matrices (APM) for fluid intelligence, and both the Creative Reasoning Test (CRT), and the Test for Creative Thinking-Drawing Production (TCT-DP) for visual creativity ending in a well- or ill-problem space, respectively. The proposed model hypothesized that working memory predicts fluid intelligence and creativity in a well and ill-defined problem spaces. Employing multiple regression analysis, the results revealed that working memory influences fluid intelligence and creativity ending in a well-defined problem space. In contrast, no effect was observed for creative cognition in ill-defined settings, suggesting that alternative processes, such as associative thinking or cognitive flexibility, mainly underlie creative performance. Overall, our findings highlight the role of working memory, deepening our understanding of cognitive interactions between fluid intelligence and creativity.