Game guide · WFMMGS
Gin Score Calculator: from controls to your first round
Take a moment to read the table. 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. Before making a move, check the cards in view. Enter the knocker’s deadwood from 0 to 10. Zero means Gin. Use another round to revisit a decision.
Fixed house bonuses of 25. It does not include line bonuses or a match-end bonus.
A focus for your next round
Keep the active rule in mind. Enter the defender’s deadwood after any legal layoffs; against Gin no layoff is allowed. Take the next action only when the current step is clear.
Understand the aim
Calculate a Gin hand score from the knocker’s and defender’s final deadwood totals. Take the next action only when the current step is clear. Begin with the objective.
Start here and follow along
- 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.
How to use the controls
Use the two numeric fields, then Calculate score. This tool uses whole numbers. Return to the explanation when a decision is unclear. Treat this as a chance to practise one rule.
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. Return to the explanation when a decision is unclear.
Avoid this misunderstanding
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.
A few questions answered
What is the aim?
Calculate a Gin hand score from the knocker’s and defender’s final deadwood totals. Begin with the objective. 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. Work at your own pace. Take the next action only when the current step is clear.
Which format is available?
Fixed house bonuses of 25. It does not include line bonuses or a match-end bonus. Work at your own pace. The same rule applies on a phone and on a computer.
What should I check before a move?
Enter post-layoff values. This arithmetic tool does not choose card groupings from card images. Keep the active rule in mind. Take the next action only when the current step is clear.
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. For a calm first round, focus on one decision. 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. Use the rule sheet as a reference. Check the relevant controls before continuing.
Can I use other Gin bonus values?
This calculator uses the same 25/25 values as this site’s Gin table. For a calm first round, focus on one decision. 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. Use the rule sheet as a reference. 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. Take a moment to read the table. 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. For a calm first round, focus on one decision. Use another round to revisit a decision.