Game guide · BJ-TYZ
Making your first moves in Gin Score Calculator
Before making a move, check the cards in view. Calculate a Gin hand score from the knocker’s and defender’s final deadwood totals. Return to the explanation when a decision is unclear. Before making a move, check the cards in view. Enter the knocker’s deadwood from 0 to 10. Zero means Gin. Check the relevant controls before continuing.
Fixed house bonuses of 25. It does not include line bonuses or a match-end bonus.
Take a closer look while playing
A clear plan starts with the current position. Enter the defender’s deadwood after any legal layoffs; against Gin no layoff is allowed. Check the relevant controls before continuing.
The goal to keep in mind
Calculate a Gin hand score from the knocker’s and defender’s final deadwood totals. Check the relevant controls before continuing. Keep the active rule in mind.
How a round unfolds
- Enter the knocker’s deadwood from 0 to 10. Zero means Gin.
- Enter the defender’s deadwood after any legal layoffs; against Gin no layoff is allowed.
- Calculate the result. Gin scores 25 plus defender deadwood; an undercut scores 25 plus the difference.
- For an ordinary successful knock, the knocker scores only the positive difference.
Input guidance
Use the two numeric fields, then Calculate score. This tool uses whole numbers. Return to the explanation when a decision is unclear. Before making a move, check the cards in view.
See the idea in action
A knock of 8 against 5 is an undercut: the defender receives 28. Gin against 18 earns the knocker 43. The same rule applies on a phone and on a computer.
Keep this in mind
Take a moment to read the table. Enter post-layoff values. This arithmetic tool does not choose card groupings from card images. Use another round to revisit a decision.
Answers about the rules and controls
What is the aim?
Calculate a Gin hand score from the knocker’s and defender’s final deadwood totals. Treat this as a chance to practise one rule. The same rule applies on a phone and on a computer.
How do I use the controls?
Use the two numeric fields, then Calculate score. This tool uses whole numbers. Look at the complete hand before deciding. Use another round to revisit a decision.
Which format is available?
Fixed house bonuses of 25. It does not include line bonuses or a match-end bonus. Treat this as a chance to practise one rule. Take the next action only when the current step is clear.
What should I check before a move?
Enter post-layoff values. This arithmetic tool does not choose card groupings from card images. Treat this as a chance to practise one rule. Check the relevant controls before continuing.
Can you give an example?
A knock of 8 against 5 is an undercut: the defender receives 28. Gin against 18 earns the knocker 43. A clear plan starts with the current position. Return to the explanation when a decision is unclear.
How is a tie scored?
A non-Gin deadwood tie is an undercut, so the defender receives 25 points. For a calm first round, focus on one decision. Return to the explanation when a decision is unclear.
Can I use other Gin bonus values?
This calculator uses the same 25/25 values as this site’s Gin table. Begin with the objective. Use another round to revisit a decision.
Does it automatically lay off cards?
No. Enter the defender’s final value after layoffs. The playable Gin table performs card-based layoff analysis. Begin with the objective. Return to the explanation when a decision is unclear.
Do I need an account or an app?
No. Open the page in a JavaScript-enabled browser. No player account or APK is needed. For a calm first round, focus on one decision. The same rule applies on a phone and on a computer.
Are these scores cash or prizes?
No. Points are used only for free play and practice. There are no deposits, cash stakes or withdrawals. Before making a move, check the cards in view. The same rule applies on a phone and on a computer.