• Log InLog In
  • Register
Liquid`
Team Liquid Liquipedia
EDT 07:32
CEST 13:32
KST 20:32
  • Home
  • Forum
  • Calendar
  • Streams
  • Liquipedia
  • Features
  • Store
  • EPT
  • TL+
  • StarCraft 2
  • Brood War
  • Smash
  • Heroes
  • Counter-Strike
  • Overwatch
  • Liquibet
  • Fantasy StarCraft
  • TLPD
  • StarCraft 2
  • Brood War
  • Blogs
Forum Sidebar
Events/Features
News
Featured News
Code S Season 1 (2026) - RO4 & Finals Preview1[ASL21] Ro4 Preview: On Course12Code S Season 1 - RO8 Preview7[ASL21] Ro8 Preview Pt2: Progenitors8Code S Season 1 - RO12 Group A: Rogue, Percival, Solar, Zoun13
Community News
Code S Season 1 (2026) - RO8 Results2Weekly Cups (May 4-10): Clem, MaxPax, herO win1Maestros of The Game 2 announcement and schedule !11Weekly Cups (April 27-May 4): Clem takes triple0RSL Revival: Season 5 - Qualifiers and Main Event12
StarCraft 2
General
Code S Season 1 (2026) - RO4 & Finals Preview Code S Season 1 (2026) - RO8 Results Code S Season 1 (2026) - RO12 Results Team Liquid Map Contest #22 - The Finalists MaNa leaves Team Liquid
Tourneys
KSL Week 89 2026 GSL Season 2 Qualifiers Maestros of The Game 2 announcement and schedule ! $5,000 WardiTV Spring Championship 2026 SC2 INu's Battles#16 <BO.9>
Strategy
Custom Maps
[D]RTS in all its shapes and glory <3 [A] Nemrods 1/4 players
External Content
Mutation # 525 Wheel of Misfortune The PondCast: SC2 News & Results Mutation # 524 Death and Taxes Mutation # 523 Firewall
Brood War
General
Pros React to: TvT Masterclass in FlaSh vs Light BGH Auto Balance -> http://bghmmr.eu/ vespene.gg — BW replays in browser BW General Discussion ASL21 General Discussion
Tourneys
[ASL21] Semifinals B Escore Tournament StarCraft Season 2 [Megathread] Daily Proleagues [ASL21] Semifinals A
Strategy
Fighting Spirit mining rates [G] Hydra ZvZ: An Introduction Simple Questions, Simple Answers Muta micro map competition
Other Games
General Games
Stormgate/Frost Giant Megathread Nintendo Switch Thread Warcraft III: The Frozen Throne Starcraft Tabletop Miniature Game PC Games Sales Thread
Dota 2
The Story of Wings Gaming
League of Legends
Heroes of the Storm
Simple Questions, Simple Answers Heroes of the Storm 2.0
Hearthstone
Deck construction bug Heroes of StarCraft mini-set
TL Mafia
Vanilla Mini Mafia Mafia Game Mode Feedback/Ideas TL Mafia Community Thread Five o'clock TL Mafia
Community
General
US Politics Mega-thread Russo-Ukrainian War Thread UK Politics Mega-thread YouTube Thread European Politico-economics QA Mega-thread
Fan Clubs
The herO Fan Club!
Media & Entertainment
[Manga] One Piece Anime Discussion Thread [Req][Books] Good Fantasy/SciFi books
Sports
2024 - 2026 Football Thread McBoner: A hockey love story Formula 1 Discussion
World Cup 2022
Tech Support
streaming software Strange computer issues (software) [G] How to Block Livestream Ads
TL Community
The Automated Ban List
Blogs
How EEG Data Can Predict Gam…
TrAiDoS
ramps on octagon
StaticNine
Funny Nicknames
LUCKY_NOOB
Customize Sidebar...

Website Feedback

Closed Threads



Active: 1390 users

Extended Series Math

Blogs > VGhost
Post a Reply
VGhost
Profile Blog Joined March 2011
United States3618 Posts
August 01 2011 15:41 GMT
#1
MLG Extended Series... Much Bitching is Le Ensued.

MLG's "extended series" format, where a Bo3 becomes a Bo7 with previous results counted, guarantees the advancing player has a winning record head-to-head.
The other system that people keep proposing is the "win two Bo3" system, where the previous loser has to win 2, the previous winner only 1, Bo3. By counting in terms of series, it avoids the possibility of the "losing head to head advances" problem. In terms of games, tie records are possible, as in a 2-1, 0-2, 2-1 advance (or 0-2, 2-1, 2-1), but the series is made the main thing so that doesn't really matter.

Anyway, I thought it would be interesting to run some numbers and see how these two systems compare.

+ Show Spoiler [W/L Table] +
Extended from 0-2
W W W W
L W
L
L W W
L
L
L W W W
L
L
L
L W W W W
L
L
L
L

Extended from 1-2

W W W
L W
L
L W W
L
L
L W W W
L
L
L

2 Bo3 System

W W W W
L W
L
L W W
L
L
L W W W
L W
L W W
L
L
L W W W W
L W
L
L W W
L
L
L
L


Assume the two players are equally good. Then in the different situations, the loser of the first series has:

Extended Series (0-2): 18.75% chance to win
2 Bo3 System: 25.00% chance to win
Extended Series (1-2): 31.25% chance to win

In a regular DE tournament, the loser of the first match would still have a 50% chance to win, so any of these situations gives the first winner an advantage. That could be good or bad: I tend to think it's a good thing overall, especially since it's a known part of the format. I prefer the MLG extended to the 2 Bo3 because it rewards a "better" loss in the first place. Series wins are good, but the point of the series is to find out who's the better player.

Other Thoughts

MLG could juggle the brackets so that rematches simply don't happen in the open bracket. It's not that hard. There are 4 OBs and 8 LBs: so split the OBs (as it were) by finalists to create 8 brackets, then rotate the losers. For example, for the first LB round OB 1.1 losers -> LB 1, then the next round OB 1.1 losers -> LB2, etc. There are then 8 brackets and only 5 seeding-downs so the rotation never goes all the way around and there are no Open rematches and everyone's happy.

The championship bracket is a different story, naturally. Even with rotation there are 6 seeds from only 4 pools so you're almost guaranteed to get a rematch at some point. It's sort of surprising there aren't more: Anaheim had only 2; Columbus had 6; Dallas had 4. But if pool were made really and truly only for seeding, then extended series rules shouldn't apply to the championship bracket.

*
#4427 || I am not going to scan a ferret.
ZpuX
Profile Blog Joined December 2002
Sweden1230 Posts
August 01 2011 15:53 GMT
#2
... There is no discussion between 2 bo3's or extended series... The discussion is about extended series or a fresh start at 0-0 when facing each other in the loser brackets.
Really, play for fun!
Uncultured
Profile Joined September 2010
United States1340 Posts
Last Edited: 2011-08-01 16:34:26
August 01 2011 16:33 GMT
#3
... A fresh start in mlg would be two best of 3's ZpuX. The first, when you first meet, the second in lose losers bracket. Where as extended series is akin to a best of seven, starting with the score from your last series.
Don't you rage when you lose too? -FruitDealer
lolsixtynine
Profile Blog Joined January 2011
United States600 Posts
Last Edited: 2011-08-01 16:56:56
August 01 2011 16:55 GMT
#4
On August 02 2011 00:53 ZpuX wrote:
... There is no discussion between 2 bo3's or extended series... The discussion is about extended series or a fresh start at 0-0 when facing each other in the loser brackets.


I'm guessing it's talking about the finals, where this actually does come up.

Edit: Looks like OP was just confused - the "2 bo3" system is exclusively being talked about for the finals, which is the only real debate... everyone outside of MLG agrees that extended series before the finals is terribad.
ZpuX
Profile Blog Joined December 2002
Sweden1230 Posts
Last Edited: 2011-08-01 18:19:25
August 01 2011 18:17 GMT
#5
On August 02 2011 01:33 Uncultured wrote:
... A fresh start in mlg would be two best of 3's ZpuX. The first, when you first meet, the second in lose losers bracket. Where as extended series is akin to a best of seven, starting with the score from your last series.

*edit* re read the OP, he is talking about winning "a bo3 consisting of bo3's". When you face each other in the LB again, the winner from WB only has to win one bo3 while the other player has to win 2 bo3's.

No, a fresh start would be as if you never played each other before. Why should someone have a harder road to the finals depending on who he got to face in the winner bracket?

Two players get knocked down to LB in the first round.

In the third round in LB, player A has to play an extended series, Which means player A has to win either 3 or 4 games to advance while player B only has to win 2 games. Does this seem fair?

Another point, why isn't this applied to every single round in the LB then? I mean it should make no difference who you lose to in WB. Playing from the LB will give you a disadvantage once you reach the final which is what should count.

Really, play for fun!
Blueblister
Profile Joined August 2009
Sweden321 Posts
August 02 2011 22:03 GMT
#6
Like ZpuX said there isn't really much of a mathematical controversy between Extended Series (ES) and "first to 2 Bo3" systems.

Both are fine when the LB and WB winners meet in the finals and both are outrageous when two players meet in the LB. Instead the "2 Bo3" vs ES discussion is of a subjective and much more debatable nature. + Show Spoiler +
- People being against ES argues that it lessens suspense as the chance to come close to or to a final deciding game is much lower. (This is why many double-elimination tournaments eliminates the rule)
- People for ES assert the added fairness, which your above example is proof of.


Which system is is more fair in the finals isn't too much to debate about either as it's pretty easy to deduct which one is correct for which situation:
+ Show Spoiler +
It's always fair to use "first to 2 Bo3" with WB winner being up a Bo3 at the start. The extended series is also provably even more fair if the players has met before.


Note that the "losing head to head advances"-dilemma is illusionary for every instance except in the LB winner vs WB winner finals as it is based on false assumptions.
Please log in or register to reply.
Live Events Refresh
RSL Revival
10:00
Season 5: Playoffs Day 2
Clem vs Rogue
Bunny vs LamboLIVE!
IntoTheiNu 1180
Tasteless1178
Ryung 475
RotterdaM375
TKL 287
IndyStarCraft 161
Rex108
3DClanTV 69
CranKy Ducklings61
CranKy Ducklings SOOP8
LiquipediaDiscussion
[ Submit Event ]
Live Streams
Refresh
StarCraft 2
Tasteless 1178
Ryung 475
RotterdaM 375
TKL 287
Lowko252
IndyStarCraft 161
ProTech142
Rex 108
MindelVK 18
StarCraft: Brood War
Britney 22012
Sea 5924
Mini 361
firebathero 303
ggaemo 237
ZerO 229
Zeus 209
Mind 163
Last 143
Soulkey 128
[ Show more ]
Rush 101
Pusan 75
Bonyth 68
Hm[arnc] 49
hero 43
Liquid`Ret 36
Backho 24
Sacsri 23
Sea.KH 23
Noble 18
Nal_rA 14
soO 13
Barracks 7
Dota 2
Gorgc5082
League of Legends
JimRising 371
Heroes of the Storm
Trikslyr28
Other Games
gofns28137
singsing1919
crisheroes284
byalli259
DeMusliM169
B2W.Neo128
monkeys_forever95
mouzStarbuck89
XcaliburYe38
KnowMe35
Sick19
ZerO(Twitch)10
Organizations
Counter-Strike
PGL42759
StarCraft 2
Blizzard YouTube
StarCraft: Brood War
BSLTrovo
[ Show 16 non-featured ]
StarCraft 2
• Adnapsc2 19
• iHatsuTV 7
• AfreecaTV YouTube
• intothetv
• Kozan
• IndyKCrew
• LaughNgamezSOOP
• Migwel
• sooper7s
StarCraft: Brood War
• iopq 2
• BSLYoutube
• STPLYoutube
• ZZZeroYoutube
League of Legends
• Nemesis2096
• Jankos1311
• Stunt495
Upcoming Events
IPSL
4h 28m
Dewalt vs nOmaD
Ret vs Cross
BSL
4h 28m
Artosis vs Sterling
eOnzErG vs TBD
BSL
7h 28m
Bonyth vs Doodle
Dewalt vs TerrOr
Patches Events
11h 13m
GSL
20h 28m
Cure vs herO
SHIN vs Maru
IPSL
1d 4h
Bonyth vs Napoleon
G5 vs JDConan
BSL
1d 7h
OyAji vs JDConan
DragOn vs TBD
Replay Cast
1d 21h
Monday Night Weeklies
2 days
Replay Cast
2 days
[ Show More ]
The PondCast
2 days
GSL
3 days
Replay Cast
4 days
GSL
4 days
Replay Cast
5 days
Sparkling Tuna Cup
5 days
Replay Cast
6 days
RSL Revival
6 days
Liquipedia Results

Completed

Escore Tournament S2: W7
WardiTV TLMC #16
Nations Cup 2026

Ongoing

BSL Season 22
ASL Season 21
IPSL Spring 2026
KCM Race Survival 2026 Season 2
Acropolis #4
KK 2v2 League Season 1
BSL 22 Non-Korean Championship
SCTL 2026 Spring
RSL Revival: Season 5
2026 GSL S1
Heroes Pulsing #1
Asian Champions League 2026
IEM Atlanta 2026
PGL Astana 2026
BLAST Rivals Spring 2026
IEM Rio 2026
PGL Bucharest 2026
Stake Ranked Episode 1
BLAST Open Spring 2026
ESL Pro League S23 Finals
ESL Pro League S23 Stage 1&2

Upcoming

YSL S3
Escore Tournament S2: W8
CSLAN 4
Kung Fu Cup 2026 Grand Finals
HSC XXIX
uThermal 2v2 2026 Main Event
Maestros of the Game 2
WardiTV Spring 2026
2026 GSL S2
BLAST Bounty Summer Qual
Stake Ranked Episode 3
XSE Pro League 2026
IEM Cologne Major 2026
Stake Ranked Episode 2
CS Asia Championships 2026
TLPD

1. ByuN
2. TY
3. Dark
4. Solar
5. Stats
6. Nerchio
7. sOs
8. soO
9. INnoVation
10. Elazer
1. Rain
2. Flash
3. EffOrt
4. Last
5. Bisu
6. Soulkey
7. Mini
8. Sharp
Sidebar Settings...

Advertising | Privacy Policy | Terms Of Use | Contact Us

Original banner artwork: Jim Warren
The contents of this webpage are copyright © 2026 TLnet. All Rights Reserved.