Up for grabs means available to anyone, and in this context the key is unclaimed and available to anyone.
Context: The key will be unclaimed and available to anyone, but he 'll be too weak to make a play for it, leaving the field wide open for you.
Hypothesis: The key will be up for grabs, but he 'll be too weak to make a play for it, leaving the field wide open for you.

Given this context, determine if the hypothesis is true (Yes, no, or unknown)?