Flat-green lawn bowls in the browser in true 3D, refereed by the World Bowls Laws of the Sport of Bowls (Crystal Mark Fourth Edition, August 2022) and cited by law number throughout. Hand, line and weight are the whole game. The bowl's bias is derived from its manufactured asymmetry as a rolling precession, reproducing Rod Cross's published trajectory equations, and the rolling friction is derived from the pace of the green as law C.26 defines it rather than chosen. The bias offset itself is calibrated against a published World Bowls green test report, and the app says so. Runs entirely in the page: no model, no credits, no account.

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