# BBO Discussion Forums: Hand History Double Dummy Notation explanation - BBO Discussion Forums

Page 1 of 1

## Hand History Double Dummy Notation explanation

### #1StuZel

• Group: Members
• Posts: 1
• Joined: 2021-March-18

Posted 2022-August-05, 04:59

Hi
Please could someone explain the double dummy notation in the hand history, or guide me to where I might find it.
Thanks in anticipation
0

### #2mycroft

• Secretary Bird
• Posts: 6,422
• Joined: 2003-July-12
• Gender:Male

Posted 2022-August-05, 09:02

At all times, for all cards, assuming everyone can see all cards and play perfectly:
• a number in red means the contract is going down that many tricks if this card is played now;
• a number in green means the contract is making with that many overtricks, if this card is played now;
• an equals sign [=] in green is equivalent to "green zero", i.e. the contract is making exactly, if this card is played now. [=] is probably used instead of [0] because traditionally 2H= means "2 hearts, making exactly" (so everyone knows what it means), and because [0] "looks like" a bad thing (could be misinterpreted as "making no more tricks" or "getting a zero" instead of "making with zero overtricks").

When I go to sea, don't fear for me, Fear For The Storm -- Birdie and the Swansong (tSCoSI)
0