rep'nA wrote:I can do it with 5 LC's (I'm sorry, but I don't differentiate between the different types of LC's).

Singles, Box 5(2), Row 7(2), Single, Row 7(4), Singles, Column 3(6), Singles, Row 4(4), Singles.

gsf wrote:4 separate times if moves are batched (-B in my solver): collect all box-line at one ply and apply as batch

9 separate times if each move is applied when found and method application order rewound (-S in my solver)

background: batching is the consensus method of choice for step counting on this forum

(re: the inferior, superior, ulterior threads)

Thanks to

rep'nA and

gsf for analyzing this puzzle. Confirming the expected number of 4 batches (this number should be rather stable/objective); if the number 9 is sum of all available LCs at each four batches, this should also be the same for all sudoku solvers, and for all isomorphic variations of the puzzle. The number 5 as minimum different LCs needed, is also an objective measure, provided all available ones are tried (one after another) as the first, second, third, fourth, (fifth).

[My own analyzer only reports the number of batches (and when they are applied).]