In **Carrom** and **Carrom Pool**, a **Bank Shot** (also known as a rebound, wall shot, or side-cutton) refers to striking the carrom piece (cutton) off one or more frame cushions (borders) so that it bounces into a corner pocket.
Mastering bank shots allows you to clear pieces that are blocked from direct line-of-sight shots or trapped against your own baseline.
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1. The Physics of a Bank Shot: Angle of Incidence & Reflection
Bank shots rely on the basic principle of light reflection: **The Angle of Incidence equals the Angle of Reflection**.
$$\text{Angle In } (\theta_1) = \text{Angle Out } (\theta_2)$$
* **The Mirror Point Technique:** To aim a basic bank shot, imagine the pocket you want to hit mirrored directly across the frame edge you are aiming for. Aim the target piece straight toward that virtual "mirror pocket."
* **Cushion Compression Factor:** Because real carrom boards have wood or rubber borders that compress when hit hard, **harder shots reflect at a slightly narrower angle** than soft shots.
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2. Common Types of Bank Shots
### A. Single-Cushion Direct Bank
* **Scenario:** A piece is sitting near the center or near a side border, but an opponent's piece blocks a direct path to the pocket.
* **Execution:** Hit your piece toward the side frame so it rebounds past the blocking piece into the target corner pocket.
### B. Board-Edge Drag / Frame Glide
* **Scenario:** A piece is lying flat against or very close to the side cushion.
* **Execution:** Strike the piece at a thin side-angle along the edge. The piece slides along the frame cushion directly into the corner pocket.
### C. Double-Bank (Two-Cushion Shot)
* **Scenario:** The target piece is trapped in an awkward angle where a single cushion bounce would miss the pocket.
* **Execution:** Rebound the piece off **two adjacent cushions** (e.g., side border then top border) in a "V" or "Z" pattern to guide it into the opposite corner pocket.
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3. Key Adjustments & Execution Tips
| Factor | Adjustment Required |
| --- | --- |
| **Powder Level** | High boric/game powder reduces friction. The piece will travel **faster and reflect at a wider, truer angle**. On a dry board, friction narrows the bounce angle. |
| **Striker Speed** | Use **medium, controlled speed**. Hitting too hard causes the cushion to absorb energy unevenly, causing unpredictable rebounds. |
| **Striker Contact Point** | To bank a target piece, hit it cleanly in the center or slightly off-center depending on the desired rebound path. Avoid putting unwanted side-spin on the target piece unless attempting an advanced trick shot. |
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4. Strategic Uses in Gameplay
* **Unblocking Trapped Pieces:** Bank shots are the primary way to pocket pieces stuck behind your opponent's defensive blocks.
* **Avoiding Striker Fouls:** When a direct shot risks sending your striker straight into a pocket (a foul resulting in a penalty piece), banking the target piece changes the striker's final trajectory, keeping it safely on the board.