Also 644: 35-30 34-29x30 33-28 27-21 and variation are winning. I recognize that the given solution for both this one and 590 are a bit better, but both alternate solutions are easily winning as well

590: 38-33 43-38 26-21 is winning as well

In puzzle 1686 34-29 28-23 is also winning

Frisian puzzle 120, scan gives the following direct win, but isn't counted as correct: 1...8-13 2.36x16 29-34 3.35x33 23x45 (4. 15-10 45-50) 4.16-11 45-50 5.11-7 50x46 (6. 7-1 24-29) 6.7-2 13-18 7.…

For frisian puzzle 80, 13-18 45-50 is a winning endgame. (The computer gives #-17)

Puzzle 1347 has different sequences but gives a fail when 26-21 is played at the 4th or 5th move