Game guide · JXLGGC
The Gin Score Calculator playbook
Begin with the objective. Calculate a Gin hand score from the knocker’s and defender’s final deadwood totals. Use another round to revisit a decision. Keep the active rule in mind. Enter the knocker’s deadwood from 0 to 10. Zero means Gin. Return to the explanation when a decision is unclear.
Fixed house bonuses of 25. It does not include line bonuses or a match-end bonus.
A focus for your next round
Begin with the objective. Enter the defender’s deadwood after any legal layoffs; against Gin no layoff is allowed. Use another round to revisit a decision.
The goal to keep in mind
Calculate a Gin hand score from the knocker’s and defender’s final deadwood totals. The same rule applies on a phone and on a computer. Work at your own pace.
A walkthrough of the rules
- 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.
Getting comfortable with the controls
Use the two numeric fields, then Calculate score. This tool uses whole numbers. Use another round to revisit a decision. Work at your own pace.
Learn from a sample situation
A knock of 8 against 5 is an undercut: the defender receives 28. Gin against 18 earns the knocker 43. Return to the explanation when a decision is unclear.
Notice this detail
For a calm first round, focus on one decision. Enter post-layoff values. This arithmetic tool does not choose card groupings from card images. Take the next action only when the current step is clear.
Common questions
What is the aim?
Calculate a Gin hand score from the knocker’s and defender’s final deadwood totals. Begin with the objective. Take the next action only when the current step is clear.
How do I use the controls?
Use the two numeric fields, then Calculate score. This tool uses whole numbers. Take a moment to read the table. 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. Before making a move, check the cards in view. 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. Use the rule sheet as a reference. Use another round to revisit a decision.
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. Use the rule sheet as a reference. The same rule applies on a phone and on a computer.
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. The same rule applies on a phone and on a computer.
Can I use other Gin bonus values?
This calculator uses the same 25/25 values as this site’s Gin table. Before making a move, check the cards in view. Take the next action only when the current step is clear.
Does it automatically lay off cards?
No. Enter the defender’s final value after layoffs. The playable Gin table performs card-based layoff analysis. Look at the complete hand before deciding. The same rule applies on a phone and on a computer.
Do I need an account or an app?
No. Open the page in a JavaScript-enabled browser. No player account or APK is needed. Treat this as a chance to practise one rule. Check the relevant controls before continuing.
Are these scores cash or prizes?
No. Points are used only for free play and practice. There are no deposits, cash stakes or withdrawals. Look at the complete hand before deciding. The same rule applies on a phone and on a computer.