Game guide · TIANNBO
Gin Score Calculator: instructions and practice
Before making a move, check the cards in view. Calculate a Gin hand score from the knocker’s and defender’s final deadwood totals. Check the relevant controls before continuing. Treat this as a chance to practise one rule. 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 with a purpose
Keep the active rule in mind. 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. Look at the complete hand before deciding.
How to proceed
- 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.
The controls to know
Use the two numeric fields, then Calculate score. This tool uses whole numbers. Return to the explanation when a decision is unclear. Keep the active rule in mind.
One way to understand the rules
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.
Avoid this misunderstanding
A clear plan starts with the current position. Enter post-layoff values. This arithmetic tool does not choose card groupings from card images. Return to the explanation when a decision is unclear.
Game-specific help
What is the aim?
Calculate a Gin hand score from the knocker’s and defender’s final deadwood totals. Look at the complete hand before deciding. 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. For a calm first round, focus on one decision. 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. Treat this as a chance to practise one rule. Check the relevant controls before continuing.
What should I check before a move?
Enter post-layoff values. This arithmetic tool does not choose card groupings from card images. Take a moment to read the table. The same rule applies on a phone and on a computer.
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. Take a moment to read the table. 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. A clear plan starts with the current position. 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. Begin with the objective. 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. For a calm first round, focus on one decision. Take the next action only when the current step is clear.
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. Use another round to revisit a decision.
Are these scores cash or prizes?
No. Points are used only for free play and practice. There are no deposits, cash stakes or withdrawals. Begin with the objective. Return to the explanation when a decision is unclear.