lidraughts.org

Mistakes in puzzles

Puzzle 646: 1. 26-21 is also winning.
Puzzle 1435: 1. 43-38 is unfortunately also winning.
Puzzle 1626: 2. ... 2-7 is also quite comfortably winning.
Puzzle 1838: great tactic, would be even better if black continued with 8. ... 12-17 :)

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 frustrating to find a winning combination and not have it count. Didn't Lichess have a feature where a strong move (but not the best one) wouldn't be marked as incorrect, but rather the interface would say something like "that's a strong move, but there's an even better one!"? I think this would be a great addition to some puzzles here, because we would still get to solve the puzzle as it was intended, but we're not penalized for finding another winning move.

Many of the winning moves below are not as good as the intended move, but still winning.

Puzzle 1045: 2. 28-23 also has a winning combination.
Puzzle 1159: 2. 23-19 also looks like it's winning.
Puzzle 1198: 3. 27-22 is also winning.
Puzzle 1212: 2. 29-24 wins easily.
Puzzle 1230: 2. ... 27-32 also wins a piece.
Puzzle 1243: 3. 22-18 is also winning.
Puzzle 1259: 2. 33-29 followed by 32-28 or 43-39 also wins in the exact same way.
Puzzle 1289: 3. ... 7-12 is also winning, but also something like 1. ... 23-29, or plenty of other moves in the starting position.
Puzzle 1301: 5. 28-23 also wins a piece.
Puzzle 1318: The 2. 28-22 "plakker" also seems to be winning, or is at least very strong.
Puzzle 1322: Playing 47-42, 48-43, or 50-45 first and 27-22 second also wins.
Puzzle 1333: playing 28-23 before 25-20 is not counted as correct.
Puzzle 1404: 2. 34-30 3. 30-24 4. 39-34 5. 37-31 6. 29-23 leads to a winning endgame.
Puzzle 1443: 1. 28-23 is also winning, and so is 1. 36-31 2. 2823.
Puzzle 1445: 1. 46-41 is also winning.
Puzzle 1937: 3. 33-29 is also winning.

I think many of these can be made less punishing if the player is allowed to try again to find the intended move.

Puzzle 600: 4. 35-30 is also winning.

Puzzle 609: Take a look at the comment of Tim. 1. ... 23-29 34x14 2. 18-23 is also winning, but way more expensive.

Puzzle 634: 4. ... 03-09 is also winning. But white can catch the king with one piece less. Maybe the 'Tim-solution' for this puzzle will work for you.

Puzzle 726: 2. ... 10x30 is also winning.

Puzzle 729: 3. 26x28 is also winning.

Puzzle 902: 1. ... 24-30 is also winning.

Puzzle 933: 5. 40x26 is also winning.

Puzzle 1301: 40x07 is also winning, in addition of the comment of Tim.

Ah great guys, I see i've got some work to do! I will pick a day in the near future to get threw them all at once.

But before that, a quick respons to the comment of @Tim:
Yes, on Lichess there was a time that in puzzles a good move, but not the best one, was counted correct and that you still had to find the best one (you did not lose rating). That was before Lichess introduced the automatic puzzle generator, based on games on their own website (something we would like to introduce in the future as well). After that, the automatic generated puzzles have only one move marked as correct. Also now you can find arguable puzzles where multiple moves are strong (or at least not bad at all), but still one move is marked as correct (you will lose rating with the other moves). In both ways of creating puzzles, clearly winning moves should not be marked as incorrect, or better to say: a puzzle should not be created if multiple clearly winning moves are a fact. @Malacia I agree that puzzle 526 shouldn't be created retrospectively, the puzzle suits better in a lesson or something (find the Coup Turk), but clearly not in the puzzle feature.

But probably there always will be arguable puzzles. We have the up- and down-vote option in the puzzles. If puzzles have bad votes (low amount relatively or negative), it will be less likely or impossible to get those puzzles again. In Lichess puzzles get tens of thousands of votes in no time where it works great, on Lidraughts it has yet less effect. Personally, I enjoy the growth of puzzlevotes a lot as I logically observe it over time. Anyway, for everyone reading this: please up- or down-vote puzzles. It will help everyone. ;)

Puzzle 1327: 2. 22-18 and afterwards 18-12 and 27-21 (or 27-21 and 18-12 of course) is the same combination.

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