Download the latest version of Double Dummy Solver.
This file is about 1080 KB, so it won't take too long to download if you have a high speed connection.
Download DD Solver
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Double Dummy Solver, is for Windows 95/98/2000/Me/NT/XP/Vista.
To download only the Double Dummy DLL, see Bo Haglund's web site.
While you're here, get to know more about Bridge Captain.