Two-dimensional confidence contours at 68% and 95% for the parameters Ω_m, H₀, σ₈, 1 − b, and w derived from Planck 2018 CMB datasets combined with the Planck 2015 SZ detected galaxy cluster sample (green). Adding the BAO probe datasets, still with a free constant w, tightens the constraints considerably. The vertical black dashed line gives the Planck calibration value (1−b∼0.8).