Danielle Sieben must be new here...
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All the King's Wine
Unfortunately not as strong as the binary solution, I have an alternate which would potentially reduce the deaths to a 3 maximum, and sips from each bottle down from 5 to 3, (down from 5000 to 3000, thus saving 2000 sips).
You name the servants 1-10, and you arrange the bottles in a 10x10x10 array, labeling the rows 1-10 along the x, y, and z axis. At the beginning of week 1, you have the servants take a sip from each bottle in their row along the x-axis. Mid week, you have the servants take a sip from each bottle in their row along the y-axis, and end of week 1, take a sip of each bottle in their row along the z-axis.
The first in that last week to die gives coord one, mid week for coord two (or nobody dies and the first death has the first two coords), and last death of the week for the final coords.
Not as strong and sure as the binary method... but alternate ;)context