Difference between revisions of "Worst move puzzles"
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(Correction: the second puzzle was by Hexanna, not Eric Demer) |
(→Puzzle 3: linked to my user-page) |
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Normally, the goal of a puzzle is to find the best move(s) or a winning move. The puzzles on this page have the opposite goal: to find the only ''losing'' move. | Normally, the goal of a puzzle is to find the best move(s) or a winning move. The puzzles on this page have the opposite goal: to find the only ''losing'' move. | ||
| + | |||
| + | The puzzles are approximately sorted by increasing order of difficulty. | ||
=== Puzzle 1 === | === Puzzle 1 === | ||
| − | By Eric Demer. Red to play the unique losing move. | + | By [[User:Selinger|Selinger]]. Red to play the unique losing move. |
| + | |||
| + | <hexboard size="4x4" | ||
| + | contents="R a1 b1 b3 B a2 a3 a4" | ||
| + | /> | ||
| + | |||
| + | Try it on [https://hexworld.org/board/#4c1,a1a2b1a3b3a4 HexWorld]. | ||
| + | |||
| + | (Of the 10 empty cells, 9 are winning moves for Red, and 1 is a losing move for Red.) | ||
| + | |||
| + | === Puzzle 2 === | ||
| + | |||
| + | By [[User:Selinger|Selinger]]. Red to play the unique losing move. | ||
| + | |||
| + | <hexboard size="4x4" | ||
| + | contents="R a3 B d2" | ||
| + | /> | ||
| + | |||
| + | Try it on [https://hexworld.org/board/#4c1,a3d2 HexWorld]. | ||
| + | |||
| + | === Puzzle 3 === | ||
| + | |||
| + | By [[User:Demer|Eric Demer]]. Red to play the unique losing move. | ||
<hexboard size="5x5" | <hexboard size="5x5" | ||
contents="R d2 d1 B e1 b1" | contents="R d2 d1 B e1 b1" | ||
/> | /> | ||
| − | |||
| − | |||
Try it on [https://hexworld.org/board/#5c1,d2b1d1e1 HexWorld]. | Try it on [https://hexworld.org/board/#5c1,d2b1d1e1 HexWorld]. | ||
| − | === Puzzle | + | === Puzzle 4 === |
By [[User:Hexanna|Hexanna]]. Red to play the unique losing move. | By [[User:Hexanna|Hexanna]]. Red to play the unique losing move. | ||
| Line 22: | Line 44: | ||
Try it on [https://hexworld.org/board/#6c1,a5f4d3d1 HexWorld]. | Try it on [https://hexworld.org/board/#6c1,a5f4d3d1 HexWorld]. | ||
| + | |||
| + | === Puzzle 5 === | ||
| + | |||
| + | By [[User:Hexanna|Hexanna]]. Red to play the unique losing move. | ||
| + | |||
| + | This is a difficult puzzle. | ||
| + | |||
| + | <hexboard size="7x7" | ||
| + | contents="R a6 e3 B b6 g4" | ||
| + | /> | ||
| + | |||
| + | Try it on [https://hexworld.org/board/#7c1,a6b6e3g4 HexWorld]. | ||
| + | |||
| + | == See also == | ||
| + | |||
| + | * [[Solutions to worst move puzzles]] | ||
| + | |||
| + | [[category:Puzzle]] | ||
Latest revision as of 18:08, 4 January 2024
Normally, the goal of a puzzle is to find the best move(s) or a winning move. The puzzles on this page have the opposite goal: to find the only losing move.
The puzzles are approximately sorted by increasing order of difficulty.
Puzzle 1
By Selinger. Red to play the unique losing move.
Try it on HexWorld.
(Of the 10 empty cells, 9 are winning moves for Red, and 1 is a losing move for Red.)
Puzzle 2
By Selinger. Red to play the unique losing move.
Try it on HexWorld.
Puzzle 3
By Eric Demer. Red to play the unique losing move.
Try it on HexWorld.
Puzzle 4
By Hexanna. Red to play the unique losing move.
Try it on HexWorld.
Puzzle 5
By Hexanna. Red to play the unique losing move.
This is a difficult puzzle.
Try it on HexWorld.
