“…Several researchers have presented their works on Sudoku square design, authors like, Lorch, (2009), Subramani andPonnuswamy (2009), Subramani, (2012), Ramon et al (2012), Mahdian and Mahmoodian (2015), Danbaba and Dauran (2016), Shehu and Danbaba (2018), Shehu and Danbaba (2018a) and Shehu et al (2023). This study extends the work of Shehu and Danbaba (2018), the work showed the inclusion of concomitant variable into each of the four Sudoku square models, method of least square was used to derive the estimators for sum of squares and cross products. The extension of the paper will be in area of analytical procedures of obtaining the least square estimates of the sums of squares and products, test of significance of the adjusted treatment effect, obtaining error mean squares for ANCOVA and ANOVA Sudoku square models, comparison of the two error mean squares and correlation coefficients between the concomitant variable and dependent variable.…”