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dr_dave
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04-05-2019, 05:38 AM

Quote:
Originally Posted by Cardigan Kid View Post
Doctor Dave, is there any sort of difficulty percentage that can be factored into the TDF. For example a table that is a 1.00 with broken in/worn cloth would play more difficult than a 1.02 table that has brand new cloth.
I was just wondering in your opinion, would it be a .01 or .02 or not make any difference with worn in cloth?
One could try to add other factors into the TDF equation to account for non-geometry factors (cloth type and condition, ball conditions, pocket facing and shim properties, rail and cushion conditions, table levelness, humidity, etc.), but it would be very difficult to quantify these effects and how they affect difficulty of play. Regardless, I decided to stick just to the most important factors that are easily and quickly measurable. For more info, see the TDF resource page and the TDF document.

Regards,
Dave
  
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07-14-2019, 10:21 AM

9' GC 2

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07-14-2019, 02:02 PM

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9' GC 2
Nice table and room.

Is that a GC-V? Let me know and I'll add it to the list.

Thanks,
Dave
  
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07-16-2019, 11:18 AM

Here's the latest:

Here's a mobile-friendly online tool (created by "Isaac") and an Excel spreadsheet for automatically calculating the TDF factor from three pocket measurements to determine the difficulty level of a table.

Measurements and data reported by AZB users for table difficulty factor (TDF), based on the table size factor (TSF), pocket size factor (PSF), pocket angle factor (PAF), and pocket shelf factor (PLF):

username - table size:TSF, pocket mouth size:PSF, mouth-throat difference:PAF, shelf depth:PLF - TDF (table description)
Vahmurka - 12':1.25, 7.2cm:1.55, 125deg:0.97, 25mm:0.98 - 1.84 (12ft Russian pyramid table)
Side Pocket - 10':1.10, 4 1/4":1.10, 1 1/4":1.14, 2 1/4":1.07 - 1.48 (10' 1920-1925 Brunswick, modified 9/2016)
CaptiveBred - 10':1.10, 4 1/8":1.15, >143.5deg:1.14, 1 1/2":0.99 - 1.43 (10' Brunswick Anniversary re-machined to Diamond specs)
Bob Dixon - 9':1.00, 4":1.20, 145deg:1.14, 1 5/8":1.00 - 1.37 (Pool Sharks, Las Vegas, money table, Diamond Pro-Am, red logo, Ernesto Dominguez-modified)
gregcantrall - 10':1.10, 4":1.20, 5/8":1.00, 1 1/2":0.99 - 1.31 (10 foot Diamond in the Sun City West, AZ Rec Center)
Ricky Sy - 9':1.00, 3 3/4":1.31, 1/4":0.97, 5/8":0.98 - 1.25 (money table at Hard Times in Bellflower, CA)
acedonkeyace - 9":1.00, 4":1.20, 1/2":0.99, 2":1.03 - 1.22 (gamble table at sidePocket in Largo, Florida)
ChrisinNC - 10':1.1, 4 1/4":1.05, 11/16":1.02, 1 5/16":0.98 - 1.20 (shimmed 10' Gabriel Sentinel, Ernesto Dominguez modified, at Family Billiards in Boone, NC)
Bonus Ball - 9':1.00, 3 7/8":1.25, 1/8":0.97, 3/4":0.98 - 1.19 (Bonus Ball table)
Marc Vidal - 9':1.00, 4 1/8":1.15, 7/16":1.05, 1":0.98 - 1.18 (shimmed Brunswick Tournament Edition)
chevybob20 - 9':1.00, 4 1/8":1.15, 7/8":1.05, 1":0.98 - 1.18 (Mark-Gregory-modified Centennial)
Baxter - 9':1.00, 4 1/4":1.10, 143deg:1.09, 1 1/8":0.98 - 1.18 (Donny-Wessels-modified AMF Grand Prix)
Qaddiction - 9':1.00, 4 1/8":1.15, 3/4":1.02, 1 3/8":0.99 - 1.16 (Diamond)
angluse - 8'+: 0.95, 3 13/16":1.25, 9/16":1.00, 7/8":0.98 - 1.16 (modified 1935 Brunswick Challenger)
ChrisinNC - 10':1.1, 4 3/8":1.05, 11/16":1.02, 1 5/16":0.98 - 1.15 (original 10' Gabriel Sentinel, Ernesto Dominguez modified, at Family Billiards in Boone, NC)
rexus31 - 9':1.00, 4":1.20, 3/8":0.98, 1":0.98 - 1.15 (mid to late 50's AMF Commercial Model similar to a Brunswick Anniversary/Sport King)
FatBoy - 9':1.00, 4":1.20, 1/4":0.97, 1":0.98 - 1.14 (Ernesto-Dominguez-modified GC)
TATE - 9':1.00, 4":1.20, 1/4":0.97, 7/8":0.98 - 1.14 (Ernesto-Dominguez-modified GC)
Mikjary - 9'-1.00, 4":1.15, 9/16":1.00, 1 5/16":0.98 - 1.13 (Brunswick Centurion)
Cardigan Kid - 10'-1.10, 4.5":1.00, 0.88":1.04, 1.5":0.98 - 1.12 (Gold Crown from Steinway Billiards - Earl Strickland's former practice/match-up table)
ChrisinNC - 9':1.0, 4 1/8":1.12, 5/8":1.01, 1 1/4":0.98 - 1.12 (tightest Gabriel's Signature Pro, Ernesto Dominguez modified, at Family Billiards in Boone, NC - Table 7)
Ralph Kramden - 9':1.0, 4 5/16":1.05, 1":1.07, 1 3/4":1.00 - 1.12 (1962 Nine foot Gold Crown 1)
pocket - 9':1.00 - 4 3/16":1.10, 7/16":0.99, 1 7/8":1.03 - 1.12 (unknown)
Neil - 7':0.85, 4 1/8":1.15, 1 1/4":1.14, 1 3/8":0.99 - 1.10 (modified Valley "bar box")
MahnaMahna - 10':1.10, 5 1/2":0.85, 2":1.09, 2 1/2": 1.07 - 1.09 (snooker table poorly converted into a pool table)
Cardigan Kid - 9':1.00, 4 1/4":1.10, 0.45":0.99, 1 5/16":0.99 - 1.08 (GC II)
MSchaffer - 9':1.00, 4 7/16:1.00, 15/16":1.07, 1 5/8":1.00 - 1.07 (GCII, RKC mod)
cigardave - 9':1.00, 4 1/2":1.00, 1":1.07, 1 3/4":1.00 - 1.07 (typical Pro-Cut Diamond)
peppersauce - 9':1.00, 4 1/4":1.10, 3/8":0.98, 1 1/4":0.98 - 1.06 (GC 3)
Side Pocket - 10':1.10, 4 7/8":0.91, 1":1.07, 1 1/2":0.98 - 1.05 (10' 1920-1925 Brunswick)
Pool Hustler - 9':1.00, 4 1/4":1.10, 1/4":0.97, 15/16":0.98 - 1.05 (modified GC, measured by rexus31)
JC, 9':1.00 - 4 7/16":1.00, 143deg:1.07, 1 3/8":0.98 - 1.05 ("Cobrasized" GC III)
SloMoHolic - 9':1.00, 4 1/2":1.00, 7/8":1.04, 1 3/8":0.98 - 1.02 (2005 Diamond Pro with ProCut pockets and Red-label rails)
CoreyClark - 9':1.00, 5":0.91, 1":1.07, 2 1//8":1.05 - 1.02 (GC I)
"standard" table - 9':1.00, 4 7/16":1.00, 9/16":1.00, 1 5/8":1.00 - 1.00 (average-difficulty table)
Goldball - 8':0.90, 12.2cm:0.91, 4cm:1.14, 5.4cm:1.07 - 1.00 (Heiron & Smith)
dr_dave - 9':1.00, 5": 0.91, 1 1/8":1.10, 1 3/8":0.99 - 0.99 (old GC II at MatchUps, Fort Collins)
MVPCues - 9':1.00, 4 1/2":1.00, 1/2":0.98, 1 5/8":1.00 - 0.98 (Antique Brunswick Jefferson, circa 1900)
oldschool1478 - 9':1.00, 4 1/2":1.00, 0.625":1.00, 1.5":0.98 - 0.98 (updated Red Badge Diamond Pro)
freds - 8'+: 0.95, 4.9":0.91, 1.1":1.1, 1.8" 1.03 - 0.98 (Gandy Big G, oversized 8)
Cardigan Kid - 9':1.00, 4 1/2":1.00, 3/4":1.02, 1 1/16":0.95 - 0.97 (GC III Table 7 at Premium Billiards, Syracuse, Mark Gregory-modified w/ Artemis cushions)
wigglybridge - 9':1.00, 4 1/2":1.00, 5/8":1.00, 1 1/2": 0.98 - 0.98 (GC 1.5, rails rebuilt & cushions replaced by Jay Spielberg)
BryanB - 9':1.00, 4 1/2":1.00, 3/4":1.02, 1 1/4":0.95 - 0.97 (1931 Brunswick with double shimmed pockets)
Poolmanis - 9':1.00, 10.9cm:1.05, 1cm:0.97, 3.1cm:0.95 - 0.97 (modified SAM)
Vahmurka - 9':1.0, 12.5cm:0.91, 20mm:1.04, 45mm:1.03 - 0.97 (Brunswick Metro)
mamics - 9':1.00, 4 11/16":0.95, 143deg:1.07, 1 3/16":0.95 - 0.97 (no-name "Chinese Cheapie" with Uylin cushions)
dzcues - 9':1.00, 4 7/8":0.91, 11/16":1.02, 1 15/16":1.03 - 0.96 (typical League-Cut Diamond)
logical - 9':1.00, 5": 0.91, 7/8":1.04, 1 3/4":1.00 - 0.95 (GC)
dr_dave - 9':1.00, 5": 0.91, 1":1.07, 1 1/5":0.98 - 0.95 (Olhausen purchased from Robert Byrne)
dzcues - 9':1.00, 5":0.91, 15/16":1.07, 1 1/2":0.98 - 0.95 (Gandy Big G)
Sloppy Pockets - 8'+:0.95, 5":0.91, 1 1/8":1.10, 1 3/4":1.00 - 0.95 (A.E. Schmidt)
44Runner - 8'+/-:0.925, 4 3/8":1.05, 3/4":1.02, 1":0.95 - 0.94 (8' Diamond Pro-Am - blue label)
Corwyn_8 - 9':1.00, 4 3/4":0.95, 1 3/4":1.02, 1 1/4":0.95 - 0.92 (Gandy Winchester)
beetle - 9':1.00, 13.1cm:0.88, 2.2cm:1.03, 4.3cm:1.00 - 0.91 (Olhausen York)
frigopie - 9':1.00, 11.5cm:0.95, 138.7deg:0.98, 3.5cm:0.98 - 0.91 (Eurotour Dynamic III)
12squared - 9':1.00, 4 7/8":0.91, 3/4":1.02, 1 1/2":0.98 - 0.91 (GC home table)
iusedtoberich - 9':1.00, 5 1/8":0.88, 1":1.05, 1 1/2":0.97 - 0.90 (GC)
MSchaffer - 9':1.00, 5 1/8":0.88, 3/4":1.01, 1 3/4":1.00 - 0.89 (GC II)
mfinkelstein3 - 9':1.00, 5 1/8":0.88, 7/8":1.03, 1 1/2": 0.97 - 0.88 (GC III)
StraightPoolIU - 9':1.00, 4 7/8":0.91, 3/4":1.02, 1 1/4":0.95 - 0.88 (GC I)
Vahmurka - 9':1.00, 5 1/8":0.88, 7/8":1.03, 1 1/2": 0.97 - 0.88 (GC)
Dopc - 8':0.90, 4 1/2":1.00, 3/4":1.02, 1 1/4":0.95 - 0.87 (8' Connelly Kayenta)
SloMoHolic - 8':0.90, 4 3/4":0.95, 3/4":1.02, 1 5/8":1.00 - 0.87 (old 8' Brunswick Medalist league table)
RobMan - 9':1.0, 5": 0.88, 3/4":1.01, 1.5":0.97 - 0.86 (GC)
SloMoHolic - 8'+:0.95, 4 7/8":0.91, 7/8":1.04, 1 1/4":0.95 - 0.85 (Brunswick Medalist at Stardust Club in Manchaca, TX)
buckshotshoey - 8':0.90, 4 3/4":0.95, 3/4":1.02, 1 1/2":0.98 - 0.85 (American Heritage "Independence")
nateobot - 7':0.85, 4 3/8":1.05, 1/2":0.95, 1 3/4":1.00 - 0.85 (custom-made)
angluse - 8'+: 0.95, 4 5/8":0.95, 7/16":0.98, 1 3/16":0.95 - 0.84 (1935 Brunswick Challenger)
dr_dave - 8':0.90, 4 3/4":0.95, 5/8":1.00, 1 3/8":0.98 - 0.84 (8' Connelly home table)
BRussell - 8':0.90, 5":0.91, 13/16":1.04, 1 1/2":0.98 - 0.83 (8' Olhausen)
Lovepool - 9':1.00, 13cm:0.88, 1cm:0.96, 3.5cm:0.97 - 0.82 (home table)
jtaylor996 - 7':0.85, 5 1/8":0.88, 146deg:1.09, 1.51":1.00 - 0.82 (7' Legacy home table)
Mooneye - 7':0.85, 4 7/8":0.91, 3/4":1.02, 1 5/8":1.00 - 0.79 (7' Brunswick "Ranchero")
SloMoHolic - 6':0.85, 4 1/2":1.00, 0":0.95, 5/8":0.95 - 0.77 (old 6' Valley "bar box")
dzcues - 7':0.85, 4 1/2":1.00, 0":0.95, 1/2":0.95 - 0.77 (7' Valley "bar box")
dr_dave - 7':0.85, 4 1/2":1.00, 0":0.95, 3/4":0.95 - 0.77 (7' Valley "bar box" at West End, Fort Collins)
  
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