by 
Perform a sum s of the items chosen from all summable series. At least two are required. The subject is chosen from the remaining non-summable series.
The TOTAL instruction may require waiting until the boxes are more or less filled before using the Booleans. Indeed, it may not be usable from the beginning of the puzzle, because there are too many possibilities. This is the case if it concerns three or more series. In fact, the difficulty level can be programmed.
To make the solution easier, Booleans are recommended; even if you have to wait a little before using them.
Summable series: series whose items can be added together because they share the same units.
Example: quantity of nuts and quantity of apples , expressed in kg.
NB: on Actilud all summable series are assumed to share the same units.
Orchard Riddle
Colin harvests 70 kg of fruit
Berthe harvests 45 kg of fruit
Dorothée harvests 40 kg of fruit
Colin: It’s impossible to code the situation with Booleans because there are too many combinations to obtain 70 kg of fruit. We’ll have to move forward with the puzzle before returning to this statement. We’ve programmed a delayed resolution.
Bertha: For Bertha, we can already put false signs in certain boxes, but here again, we have to move forward in the puzzle to code the Booleans. We’ve programmed the partial resolution.
Dorothy: We can code the puzzle with Booleans from the start because the number of possibilities is limited. We’ve programmed the complete solution.
Designer
Add up all available summable series and choose a topic from the remaining series. There are three immediate solution choices:
Immediate resolution:
- deferred: no sign can be placed if the instruction is used on an empty location;
- partial: signs can be placed if the instruction is used on an empty location, but it will be necessary to come back later, when the puzzle has progressed.
- complete: full resolution is possible even if the instruction is used on an empty location.
Important : You must choose the correct resolution mode; if it is not available, the instruction is ignored.
Isolated: If the instruction operates in isolated mode, the designer does not select rows that already contain signs, including Booleans.
Maximum number of executions of this instruction.
Generated formal proposals
z :Σ(A, B, … ,Z)= s
Colin: Σ(nuts, apples, pears)= 70
Bertha: Σ(nuts, apples, pears)= 45
Dorothy: Σ(nuts, apples, pears)= 40