Puzzle 90: Antimatter

Dual Masyu Follow regular Masyu rules. This is a loop puzzle: Draw a loop that passes some of the cells such that the loop never touches or crosses itself, the loop only turns on cell centers, and the loop only makes 90-degree turns. The loop must pass all circles. When it passes a white circle, it must go straight, but must turn either before or after (or both). When it passes a black circle, it must turn, but must go straight both before and after it.

Additionally, this puzzle is two in one; it has two solutions that are coupled in the following way. Gray circles are two circles that have different colors in the two puzzles; if a gray circle acts as a white circle in one puzzle, then it must be black in the other, and vice versa. (In either puzzle, two gray circles may act as one white and one black; they don’t need to act as the same color.)

Expected difficulty Medium • Answer • Comment/E-mail if you want a solution to be published

Puzzle 90: Antimatter
Dual Masyu

No particular comment; just toying with interesting things.

Puzzle 88: I Give Up

Masyu Loop: Draw a loop that passes all the circles. Whenever the loop passes a white circle, it must go straight, but turns either before or after the circle (or both). Whenever the loop passes a black circle, it must turn, but go straight on both before and after the circle.

Expected difficulty Medium • Answer • Comment/E-mail if you want a solution to be published

Puzzle 88: I Give Up
Masyu

This puzzle was intended to be completely antisymmetric and has the same (okay, mirrored) pattern of givens as this puzzle. Turns out both objectives aren’t met. I give up tweaking it, hence the name.

Deception Preview 2: A Chaotic Order of Circles

Semi-liar Masyu Draw a loop where all segments are parallel to the edges of the grid, turning only at cell centers. The loop must pass all circles. At a black circle, the loop must turn but may not turn at the squares exactly before it and after it. At a white circle, the loop may not turn but must turn either at the square exactly before it or after it (or both). In addition, every second circle that the loop passes has an incorrect color and should be the other color (white if it’s black and vice versa).

Answer key: Enter the lengths of the horizontal/vertical line segments in the row/column respectively. Enter 0 if there is none.

Difficulty 3.0/10 • Target times 01:30 03:00 07:30 20:00
Solution Answer key (highlight →) 211,6 • PNG (not uploaded) • ZIP of PDF (not uploaded) • DOCX (not uploaded)

Deception Preview 2: A Chaotic Order of Circles
Semi-liar Masyu

Second preview puzzle. Perhaps one of three or something puzzles that don’t have any certain theme.

*checks archive*

Well, seems like there are indeed only three that doesn’t have any theme, and only one will appear in the test. Whee. I have too high standards of aesthetics.

Puzzle 15: Masyu

Masyu, a rather easy one. Draw a loop on the grid cells (connecting cell centers) so it passes each circle. When passing a black circle, it must turn there but may not turn at the squares exactly before and after it. When passing a white circle, it may not turn there but must turn at at least one of the squares exactly before and after it.

Puzzle 15: Masyu

First anti-symmetrical Masyu I managed to complete (all other anti-symmetrical Masyu I’ve made are ambiguous at one part of the loop T_T ). But then I need to figure out how to make the circles -_- Finally I went through the manual approach; making the black circle and white circle template, then copying them to target cells. The puzzle itself is pretty good IMO.