Puzzle 1366: after 38-32 the moves 35-30 and 26-21 can be played in either order, but only 35-30 first is accepted.

I often find puzzles where a winning move isn't counted as correct because another move is even better. I get that the exercise is to find the best move, but at the same time it can be quite frustrati…

Puzzle 2155: 1. 38-32 27x47 2. 37-31 47x20 3. 26-21 is also winning.

Puzzle 2101: 1. 32-28 is also winning.

Frisian puzzle #22: Alternative solution 1. .. 18-23 (natural idea which comes into mind because of many holes) 3. 24x4 (maximum capturing rule) 13-19 (free tempo) 3. 4x36 (king's primacy rule) …

There is an alternative solution, although it is a bit longer, but the tactical motif can be spotted easier: 1.48-42 37x48 2.17-12 7x18 3.15-10 5x14 4.44-39 48x34 5.35x4 18-22 6.4x27 36-41 7.27-31 …

43-38 + 48-42 and 43-38 + 38-32 are also winning

Puzzle 1059: on the sixth move (with opposite kings) multiple wins are possible apart from the expected 38-32. My 38-33 (29x38 43x32 etc. try) was deemed wrong. I didn't check 42-37 and 47-41, but tho…

Puzzle 1542 can be solved in two ways: the solution as is, but also 1.33-29! (24x33) 2.38x29 (22x24) 3.34-29 (24x33) 4.42-38 (33x42) 5.32-27 (21x41) 6.36x38 (26x37) 7.48-42 (37x48) 8.40-34(48x30) 9.35…

I was testing Scan's endgame technique in International draughts by comparing human approach and AI approach. There is a nice puzzle by Noome and Hortsman (I quote their names by cyrillic retransla…