Game guide · MIBDF
A practical guide to Gin Score Calculator
For a calm first round, focus on one decision. 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. Check the relevant controls before continuing.
Fixed house bonuses of 25. It does not include line bonuses or a match-end bonus.
Practice beyond the first move
For a calm first round, focus on one decision. 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. Take the next action only when the current step is clear. A clear plan starts with the current position.
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.
How to use the controls
Use the two numeric fields, then Calculate score. This tool uses whole numbers. The same rule applies on a phone and on a computer. Work at your own pace.
A useful example
A knock of 8 against 5 is an undercut: the defender receives 28. Gin against 18 earns the knocker 43. Use another round to revisit a decision.
Pay attention to this rule
Treat this as a chance to practise one rule. Enter post-layoff values. This arithmetic tool does not choose card groupings from card images. Return to the explanation when a decision is unclear.
Helpful answers for players
What is the aim?
Calculate a Gin hand score from the knocker’s and defender’s final deadwood totals. Use the rule sheet as a reference. Return to the explanation when a decision is unclear.
How do I use the controls?
Use the two numeric fields, then Calculate score. This tool uses whole numbers. Begin with the objective. The same rule applies on a phone and on a computer.
Which format is available?
Fixed house bonuses of 25. It does not include line bonuses or a match-end bonus. Look at the complete hand before deciding. Return to the explanation when a decision is unclear.
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. 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. Look at the complete hand before deciding. 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. Take a moment to read the table. Take the next action only when the current step is clear.
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. 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. Take a moment to read the table. Use another round to revisit a decision.
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. Take the next action only when the current step is clear.
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. Check the relevant controls before continuing.
