Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy.

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our Privacy Policy and User Agreement for details.

Successfully reported this slideshow.

Like this presentation? Why not share!

- Mochy's 8 Backgammon Quiz in Cyprus... by Masayuki Mochizuki 910 views
- Visualizing the formation by Masayuki Mochizuki 4309 views
- Late hit by Masayuki Mochizuki 3643 views
- Backgame by Masayuki Mochizuki 4850 views
- Texas Backgammon Championship QUIZ ... by Masayuki Mochizuki 7449 views
- Mochy's 10 Backgammon Problems by Masayuki Mochizuki 8477 views

11,021 views

Published on

Video can be found here. http://www.youtube.com/watch?v=9sv5opV2r_Y

I talked about two main theme.

1, Nroll vs Nroll

2, Two men bear off

No Downloads

Total views

11,021

On SlideShare

0

From Embeds

0

Number of Embeds

4,964

Shares

0

Downloads

105

Comments

3

Likes

10

No embeds

No notes for slide

- 1. Bear off cube action by mochy @ Merit Backgammon Open 2013
- 2. Today’s agenda 1) N roll vs N roll 2) Two men bear off
- 3. Why Important? Each decision in the bear off is CRITICAL as Equity difference is usually very large. Cube gets high in the end game much more often. It shows the nature of the game. You can’t win without taking a risk.
- 4. True N roll vs N roll 1) All checkers are piled on the low points. 2) You never miss. 3) All doublets should work.
- 5. Problem 1 White on roll. Cube action? 1) No double & Take 2) Double & Take 3) Double & Pass
- 6. Problem 1 answer 3) Double & Pass Red has only 21%. Much lower than 25%.
- 7. Correct Cube Action 2 roll vs 2 roll = Double / Pass 14% 3 roll vs 3 roll = Double / Pass 21% 4 roll vs 4 roll = (Re)Double / Take 25.5% 5 roll vs 5 roll = Double / Take 28% (No redouble)
- 8. Problem 2 White on roll. Cube action? 1) No double & Take 2) Double & Take 3) Double & Pass
- 9. Problem 2 answer 2) Double & Take White loses with 21. (Red redoubles and white must pass) 5.5% + 21% > 25%
- 10. Problem 3 White on roll. Cube action? 1) No double & Take 2) Double & Take 3) Double & Pass
- 11. Problem 3 answer 2) Double & Take 32, 31, 21 are misses. 6/36 = 17% 17% + 14% > 25%
- 12. Problem 4 White on roll. Cube action? 1) No double & Take 2) Double & Take 3) Double & Pass
- 13. Problem 4 answer 2) Double & Take 1) 11, 22 don’t work. 2)Rolling an ace three times! 3)21, 21 makes red redouble!
- 14. Problem 5 White on roll. Cube action? 1) No double & Take 2) Double & Take 3) Double & Pass
- 15. Problem 5 answer 3) Double & Pass Both sides have non working doublets. (11, 22, 33) It hurts Red much more ! Red needs to roll doubles, White doesn’t.
- 16. Two men bear off
- 17. Problem 6 White to play 21. 1) 6/3 2) 5/2 3) 6/4 5/4
- 18. Problem 6 answer 1) 6/3 5&3 14 numbers 6&2 13 numbers 4&4 11 numbers
- 19. The rule 1 ) If you can bear off, do so. 2) Never put checkers on the same point 3) Magic Number “31524” It is the ranking of the gap between two checkers. 3 pips apart is the best, 1 pip apart is the second… and so on.
- 20. Problem 7 1) 6/2 2) 5/1 3) 6/3 5/4
- 21. Problem 7 answer 1) 6/2 5 & 2 – 19 numbers (3 pips apart) 4 & 3 – 17 numbers (1 pip apart) 6 & 1 – 15 numbers (5 pips apart)
- 22. Problem 8-1 White on roll. Cube action? 1) No double & Take 2) Double & Take 3) Double & Pass
- 23. Counting 1) Count the lesser! 2) Count them in order. (from big to small or vice versa) 3) Count non-doublet first, multiply by 2, then go for doublet. - 65, 64, 63, 62, 61, 54,,,,21. (multiply by 2) - 66, 55, 44, 33, 22, 11
- 24. Problem 8-1 answer 2) Double & Take 19 numbers are little more than 18. You are a tiny favorite.
- 25. Flip a coin?
- 26. Problem 8-2 White on roll. Cube action? 1) No double & Take 2) Double & Take 3) Double & Pass
- 27. Problem 8-2 answer 2) Double & Take White would miss with any 1 except 11. (10 numbers) 10 numbers is more than 9. (9/36 = 25%)
- 28. 2 & 2 is a STRONG double
- 29. Problem 9 White on roll. Cube action? 1) No redouble & Take 2) Redouble & Take 3) Redouble & Pass
- 30. Problem 9 answer 1) No Redouble & Take White is only a tiny favorite (flip a coin!) Don’t give red a chance to offer a very strong redouble! Also known as “Jacoby Paradox”
- 31. Problem 10 White on roll. Cube action? 1) No double & Take 2) Double & Take 3) Double & Pass
- 32. Problem 10 answer 3) Double & Pass To take, your position needs to be better than your opponent. Or you must have an instant redouble if he misses.

No public clipboards found for this slide

Those are different positions.

When you examine slide 13, you will notice the position op slide 12 is hidden.

Actually there are 3 positions piled up in slide 13.

The correct board is hidden (there are three boards piled up)