## Archive for the ‘Day of week / Difficulty’ Category

### Puzzle 381 (Nurikabe/Tapa) [Mastermind]

October 30, 2011

This is a Nurikabe / Tapa Mastermind puzzle. Solve the left grid as a Nurikabe and the right grid as a Tapa. The gray numbers between corresponding rows represent Mastermind clues. If one were to superimpose the two solutions (without rotation or reflection), the gray number in a row tells exactly how many squares are shaded in both grids.

Puzzle 381

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### Puzzle 380 (Statue Park)

October 28, 2011

This is a Statue Park puzzle.

Puzzle 380

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### Puzzle 379 (Heyawacky)

October 26, 2011

This is a Heyawacky puzzle.

Puzzle 379

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### Puzzle 378 (Out of Sight)

October 24, 2011

This is a Out of Sight puzzle.

Puzzle 378

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October 23, 2011

Puzzle 377

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The symmetry and lack of edge clues was as hard to pull off as it looks like, both in constructing and proving uniqueness. I don’t think the puzzle itself is that difficult though.

### Puzzle 376 (Tapa)

October 21, 2011

This is a Tapa puzzle.

Puzzle 376

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### Puzzle 375 (Statue Park)

October 19, 2011

This is a Statue Park puzzle.

Puzzle 375

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This is a friendly notice that the full set of pentominoes is not used in this puzzle.

### Puzzle 374 (Remembered Length)

October 17, 2011

This is a Remembered Length puzzle.

Puzzle 374

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### Puzzle 373 (Masyu) [Optional Blacks]

October 16, 2011

This is a Masyu puzzle, with a twist. The loop is not required to pass through black circles. But if a black circle is passed through, it still functions like it would in ordinary Masyu.

Puzzle 373

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The gimmick in this puzzle means that trial and error strategies are likely to get you the solution in short order. So I did my best to make the logical path as clean as possible, and I mostly succeeded. For maximum enjoyment and challenge, avoid any if-then sequences of significant depth.

### Puzzle 372 (Sudoku) [Star]

October 14, 2011

This is a Sudoku puzzle, with a twist. Only the numbers 1 to 7 are used in this puzzle, and two spaces in each row, column, and box will not have numbers. Those spaces contain stars instead. Two cells containing stars may not be adjacent, not even diagonally.

Puzzle 372

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If I ever do this variation again I’ll probably do irregular regions and maybe add an extra row or column. A 9 by 9 star battle with those regions just doesn’t have enough solutions for these to stay interesting.