Logic Masters Deutschland e.V.

This puzzle is inspired by "Chess Lines" by gdc. Many thanks to gdc for the inspiration, and to henrypijames for rephrasing the rules to be more intuitive!

Rules:

Normal sudoku rules apply.

Each line is divided by box borders into six segments, with each segment assigned to one of the six chess pieces, and no two segments of the same line assigned to the same chess piece.

Within each segment, adjacent digits must occupy positions on a standard keypad that allow the assigned chess piece to move directly between them according to standard chess rules - e.g. 1-8-3 on a knight segment, 7-8-6 on a king segment, and 8-5-2 on a pawn segment.

No special movement is allowed - i.e. no castling for a king, nor initial two squares advance, standard capture, en passant strike, or promotion for a pawn, so the movement of a pawn on the keypad must be vertical, in one direction, and one square at a time.

The shape of any line segment in the grid is unrelated to and unrestricted by chess rules.

Whenever a line crosses box borders, the two digits on either side must be consecutive.

Across the black dot, one digit must be double the other.

You can play the puzzle here:

CTC App

Happy solving! Please leave a comment if you enjoy this puzzle, and check out some of my others!