Fixed Non-Rectangular Grid

Fixed Non-Rectangular Grid establishes a fixed, non-rectangular active playing grid where only specific symbol positions within a larger visual layout are active for symbol landing and win evaluation, creating a unique and static reel shape.
This is a fundamental structural design of the active playing field, not a dynamic change, blocker removal, or an additional reel.
The inactive positions are never used; it's a static, non-rectangular active area from the start, not a dynamic state or an expansion.