Puzzle 1823: 3. 42-47 is winning.
Mistakes in puzzles
Puzzle 1720: 27-21 42-38 is winning.
Puzzle 1724 22-18 is winning.
Puzzle 1963: 35-30 39-34 is winning.
Puzzle 2326: 40x29 is winning.
Puzzle 2435: 17-21 is winning.
Puzzle 2754: 27-21 is winning.
Puzzle 3533: 27-22 is winning.
Puzzle 3308: 14-20 is winning.
Puzzle 4839: 35-30 is winning.