Are there any gambits where I HAVE to decline? I know popular openings like the Queen's Gambit can be accepted with an initiative for white. Is there any gambit where accepting it would lead to a forced mate for the player that accepted it?
While it's not generally given as part of the explicit definition, the term &quot;gambit&quot; usually refers to an offer of material that can be accepted. If it can't be accepted, then it's a trap.
You can look through chess traps and see that many of them involve apparently giving up material.