Editing Law of total tricks (section)

==Definition==
LoTT can be stated as follows:

''The total number of tricks available on a deal is equal to the total number of trump cards both sides hold in their respective best suits, where the total number of tricks is defined as the sum of the number of tricks available to each side if they could choose trumps.''

As an example, if North-South between them hold nine spades and East-West hold eight clubs, the LoTT says that the total number of tricks available is 17 (9 + 8). Note the LoTT says nothing about how many tricks each side will make; this depends on the split of [[Contract bridge glossary#HCP|high card points]] (HCP) as well as the number of trumps held - if, in the example, the side with eight clubs held all the HCP, they would make all 13 tricks with clubs as trumps - but if the other side could choose spades as trumps, they could well make four tricks (draw trumps and cross ruff) - note 13 + 4 still = 17. When the HCP are fairly evenly split between the two sides, the number of trumps held by each side is a close indicator of the tricks available to each side.

This method works on the assumption that for shapely hands, the combined length of the trump suit is more significant than points or HCP in deciding on the level of the final contract. It is of most value in competitive bidding situations where the HCP are divided roughly equally between the partnerships.

LoTT is said to be most accurate when the HCP are fairly evenly divided between the two sides and the bidding is competitive.  Experts apply adjustment factors to improve accuracy.