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Big Diamond in the USBF Open

#1 User is offline   glen 

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Posted 2015-May-10, 06:41

One of the more interesting systems ever played in the US will be in the US Open knockouts today.
Dinkin-Tunçok call if "Modified Fantunes" but it really is unique. Here is the 1-2 second opening structure that they used in the Round Robin to get into the KOs today:

1♣: 10-14 all purpose, either:
- 13-14 balanced, can have 5cM
- 10-14 unbalanced with a minor
- 10-14 three suited
- 10-14 5-4+/4-5+ majors
- 10-14 7M (7321)

1♦: artificial, 15+, no 5cM except in 1-2 can be 5440/5332/5422

1♥: 8-10, 4+♥s, may have longer second suit

1♠: 8-10, 4+♠s, may have longer minor

1NT: 10-12

2♣: 15+, 5+♥s

2♦: 15+, 5+♠s

2♥: 10-14, 5+♥s, fewer than 4♠s

2♠: 10-14, 5+♠s, fewer than 4♥s

2NT: 20-21 balanced

Now that they are in the KOs the system mutates so all two bids are closer to Fantunes. Here is the 1-2 seat structure:

1♣: 8-13, either 8-10 all shapes, or 11-13 and:
- three suited
- 5-5+ any two suits
- 5-4+/4-5+ majors
- 7 card suits

1♦: artificial, 14+, 14-21 no 5 card card or longer major or 22+ any

1♥: 14-21, 4+♥s (5+♥s if minimum), may have longer second suit

1♠: 14-21, 5+♠s, may have longer minor

1NT: 11-13, includes all 5332s/5422s even if both majors

2♣: 10+ to 14-, 5+♣s

2♦: 10+ to 14-, 5+♦s

2♥: 10+ to 14-, 5+♥s, fewer than 4♠s

2♠: 10+ to 14-, 5+♠s, fewer than 4♥s

2NT: 19-20 balanced

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#2 User is offline   Free 

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Posted 2015-May-10, 09:10

Interesting system, but if this is modified Fantunes, they have no clue what (unmodified) Fantunes is.
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#3 User is offline   Trinidad 

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Posted 2015-May-10, 10:25

To me this looks more like Magic Diamond than Fantunes.

(And I like Magic better than this "Modified Fantunes" system.)

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#4 User is offline   gwnn 

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Posted 2015-May-10, 13:22

1♠-?
only 1NT non GF (yes, even 2♠ is GF, with diamonds perhaps)!

1♠-1NT
2♣=0-2 hearts
2♦=3 hearts
2♥=4 hearts

pretty refreshing to see something else in action.
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#5 User is offline   PhantomSac 

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Posted 2015-May-10, 14:16

It is definitely interesting to play against.
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#6 User is offline   antonylee 

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Posted 2015-May-10, 21:04

A funny relay auction: http://usbf.org/docs...6_1_s1.htm#bd13
Dinkin-Tunçok go through every bid between 1C and 3H except for 1N.
As a side note the USBF scripts clearly don't handle auctions with more than 9 alerts :)
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Posted 2015-May-11, 11:00

View Postantonylee, on 2015-May-10, 21:04, said:

A funny relay auction: http://usbf.org/docs...6_1_s1.htm#bd13
Dinkin-Tunçok go through every bid between 1C and 3H except for 1N.
As a side note the USBF scripts clearly don't handle auctions with more than 9 alerts :)

That's just standard symmetric relay
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#8 User is offline   straube 

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Posted 2015-May-11, 13:06

I'd be curious to know their 1C response structure. If 1C-1M is nf and 1C-1D is GF then how do they handle the GI hands? To compare or contrast it with the Recursive Diamond (a strong diamond system), the 1C here has far more hand types and a wider range while the Recursive Diamond's 1D response to 1C is GI+.
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#9 User is offline   Kungsgeten 

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Posted 2015-May-12, 00:41

When I played forcing pass our 1C opening was like Magic Diamond's (similar to the system described but stronger). 1C was any 12-16 unbalanced or 15-17 NT. We used the 1D response as two-way: a weak hand (0-7 in our case) or any GF (12+ for us). The other responses showed Constructive values (about 8-11). I think a similar structure would work over their 1C, with adjusted point ranges.
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#10 User is offline   benlessard 

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Posted 2015-May-12, 11:09

If 1C-1M is nf and 1C-1D is GF then how do they handle the GI hands?

Opener wont pass if hes max. so responder will have a 2nd shot.
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#11 User is offline   steve2005 

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Posted 2015-May-17, 15:53

View Postglen, on 2015-May-10, 06:41, said:

One of the more interesting systems ever played in the US will be in the US Open knockouts today.
Dinkin-Tunçok call if "Modified Fantunes" but it really is unique. Here is the 1-2 second opening structure that they used in the Round Robin to get into the KOs today:

1♣: 10-14 all purpose, either:
- 13-14 balanced, can have 5cM
- 10-14 unbalanced with a minor
- 10-14 three suited
- 10-14 5-4+/4-5+ majors
- 10-14 7M (7321)

1♦: artificial, 15+, no 5cM except in 1-2 can be 5440/5332/5422
1♥: 8-10, 4+♥s, may have longer second suit
1♠: 8-10, 4+♠s, may have longer minor
1NT: 10-12
2♣: 15+, 5+♥s
2♦: 15+, 5+♠s
2♥: 10-14, 5+♥s, fewer than 4♠s
2♠: 10-14, 5+♠s, fewer than 4♥s
2NT: 20-21 balanced

Now that they are in the KOs the system mutates so all two bids are closer to Fantunes. Here is the 1-2 seat structure:


Goodness I think this is allowable under GCC. Not their knockout structure of course.
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