Grant
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syncingsinking.bsky.social
Grant
@syncingsinking.bsky.social
1.7K followers 1.8K following 3.5K posts
Married, three kids. White, cishet, he/him. Deaf in one ear. Math, disability, chess, LFC. In Illinois via Texas but born and raised in Cornwall 〓〓
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syncingsinking.bsky.social
White to play and mate in 6.

#chess #puzzles
Chess board from White's perspective. White piece locations: King g1; Queen d1; Rook a1; Bishops e3, h7; Knight f4; pawns a2, b2, d4, g2, h2. Black piece locations: King h8; Queen b6; Rook a8; Bishops c8, d6; Knight e5; pawns a7, b7, d5, e6, g7. Colored squares indicate last move was Black Bishop from f8 to d6.
November 11, 2025 at 1:31 AM
syncingsinking.bsky.social
A view of a lake and trees across the lake. The trees are different shades of green, brown and red and can be seen reflected symmetrically in the water. The sky is gray above and the view is framed by two trees in the foreground at the far left and right of the picture.
November 9, 2025 at 4:30 AM
syncingsinking.bsky.social
A sky which is dark blue at top, gradually turning lighter, then to bright orange near the horizon. Silhouettes of small trees and one street light appear black against the sunset.
November 6, 2025 at 2:23 AM
syncingsinking.bsky.social
This is an amusing autocaption fail but I'm guessing @jamellebouie.net wouldn't mind it being changed? Is there a way that can be done?

(He clearly says "Dick Cheney died. Yes, that Dick Cheney."
Jamelle Bouie looking at the camera wearing a white shirt, beige jacket, black Fujifilm hat and glasses. There is a bookshelf behind him with books and cameras on it. The caption reads "Dick Cheney died yes" Jamelle Bouie looking at the camera wearing a white shirt, beige jacket, black Fujifilm hat and glasses. There is a bookshelf behind him with books and cameras on it. The caption reads "fat Dick Cheney"
November 5, 2025 at 4:28 PM
syncingsinking.bsky.social
Moon and sky were beautiful near sunset tonight. This picture hardly does it justice
A light blue sky, turning slightly pink near the horizon, with the moon bright and visible just above a line of red, brown and green trees
November 5, 2025 at 1:28 AM
syncingsinking.bsky.social
White to play and mate in 7.

#chess #puzzles
Chess board from White's perspective. White piece locations: King g1; Queen g7; Rooks c1, d1; Knight b6; pawns a4, b2, d5, f2, g2, h2. Black piece locations: King e8; Queen e5; Rooks c8, f8; Bishop b7; Knight c6; pawns a5, b4, f5, f7, h5. Colored squares indicate last move was Black Queen from e6 to e5.
November 1, 2025 at 2:11 PM
syncingsinking.bsky.social
How your email finds me
A statue, or painted mold, resembling a life-sized person. The mold is painted in very bright colors, with the arms, torso and face bright yellow, with black and green designs all over. The legs are blue and white, also with intricate designs. Close zoom shows the person's eyes are closed. The statue is standing in front of a large object shaped like a maple syrup bottle inside a room that looks like a museum or gallery
October 31, 2025 at 3:23 AM
syncingsinking.bsky.social
How your email finds me
A rag doll made of red yarn and wearing a brown item of clothing that appears to be made of sackcloth. The doll has two circular eyes and two teeth and has a seemingly vacant expression. It is perched on top of a tree-like structure.
October 30, 2025 at 2:18 AM
syncingsinking.bsky.social
Misery Is a Butterfly Article Talk Language Watch Edit Misery Is a Butterfly is the sixth studio album by American alternative rock band Blonde Redhead. The album was released on
October 29, 2025 at 6:08 PM
syncingsinking.bsky.social
White to play and mate in 4.

#chess #puzzles
Chess board from White's perspective. White piece locations: King g1; Queen h6; Rooks a1, e3; Knight g5; pawns a2, b2, c3, d4, f2, g2, h2. Black piece locations: King f8; Queen c7; Rooks a8, g7; Bishops f4, g4; pawns a7, b7, c5, d5, f7, h7. Colored squares indicate last move was Black bishop from d6 to f4.
October 29, 2025 at 12:51 AM
syncingsinking.bsky.social
How your email finds me
An animal face apparently made out of a shiny, golden metal. The mouth is open showing sharp teeth like those of a large cat, and the eyes are large and round and open very wide
October 28, 2025 at 10:57 PM
syncingsinking.bsky.social
Happy This Warning Light Morning to all who celebrate
Photo of the rpm circle of a car dashboard showing the tire pressure warning light illuminated
October 20, 2025 at 2:59 PM
syncingsinking.bsky.social
White to play and mate in 10.

#chess #puzzles
Chess board from White's perspective. White piece locations: King h1, Queen e3, Rooks d1, d6, Bishop b3, Knight b5, pawns a4, b2, c2, f2, g3, h3. Black piece locations: King h8, Queen f5, Rooks a6, f8, Bishop b6, Knight b8, pawns a5, b4, c5, e4, g7, h6. Colored squares indicate last move was Black Queen from e5 to f5.
October 14, 2025 at 2:51 PM
syncingsinking.bsky.social
Black to play and mate in 3.

#chess #puzzles
Chess board from Black's perspective. Black piece locations: King g8, Rook d3, Knight a6, Bishop a3, pawns a7, b6, d5, e6, f7, g6, h7. White piece locations: King c2, Rook f2, Knight f3, Bishop h6, pawns a2, d4, g4, h3. Colored squares indicate last move was White King from b2 to c2.
October 12, 2025 at 10:00 PM
syncingsinking.bsky.social
White to play and mate in 1.

#chess #puzzles
Chess board from White's perspective. White piece locations: King c1, Queen g5, Knight h8, pawns a2, b2, c3, e5, f7. Black piece locations: King e6, pawns a4, b5, d4, d5. Colored squares indicate last move was Black pawn cxd4.
October 10, 2025 at 1:12 AM
syncingsinking.bsky.social
Black to play and win.

#chess #puzzles
Chess board from Black's perspective. Black piece locations: King g8, Queen c6, Rook d8, Knighy d5, pawns a7, b6, f7, g7, h7. White piece locations: King g2, Queen f3, Rook d1, pawns a2, b2, f2, g3, h2. Colored squares indicate last move was White Queen from d3 to f3.
October 7, 2025 at 10:29 PM
syncingsinking.bsky.social
Cover of 90 Bisodol (Crimond) by Half Man Half Biscuit. A dark floor with a white outline of a person like at a crime scene
October 5, 2025 at 2:12 AM
syncingsinking.bsky.social
The pentagonal bipyramid is one I have been thinking about a lot recently
A pentagonal bipyramid. A 3-dimensional polyhedron formed by taking a pentagon and adding one vertex above it, to which each of the five vertices is connected via an edge, and another vertex below it, to which again all five vertices of the pentagon are connected via an edge. A pentagonal bipyramid where every vertex has been turned into an ideal vertex, where the edges meeting that vertex go to infinity in a way that they are asymptotically parallel. The triangular faces are colored red, yellow, green, blue, purple, and other shades to distinguish each face.
October 4, 2025 at 1:11 AM
syncingsinking.bsky.social
Update: I suppose it was too much to ask for only nice rational numbers #MathSky
Table with two columns, first headed n, second f(n). n | f(n) ------- 3 | - 4 | 7 5 | 10 6 | 14 7 | ? (1/4) (29 + sqrt(857)) ? 8 | 16? 9 | ? 10 | 58/3? 11 | ? 12 | 23
October 3, 2025 at 9:20 PM
syncingsinking.bsky.social
White to play and mate in 5.

#chess #puzzles
Chess board from White's perspective. White piece locations: King b1, Queen f4, Rook d1, Bishop d3, Knights e2, e4, pawns a2, b2, f3, f6, g2. Black piece locations: King e8, Queen b7, Rooks g7, h8, Bishops a8, e7, pawns a7, b6, e6, g6. Colored squares indicate last move was Black King from f7 to e8.
September 23, 2025 at 1:19 AM
syncingsinking.bsky.social
Does this look familiar? #MathSky
Table with two columns, first headed n, second f(n). n | f(n) ------- 3 | - 4 | 7 5 | 10 6 | 14 7 | ? 8 | 16? 9 | ? 10 | 58/3? 11 | ? 12 | 23
September 18, 2025 at 6:59 PM
syncingsinking.bsky.social
A park bench, brightly lit by a streetlight directly above it, viewed from behind a dark tree. A dark, blue-purple sky is partly visible beyond other park trees in the distance
September 16, 2025 at 2:33 AM
syncingsinking.bsky.social
So since the figure-8 knot is the only arithmetic knot, it's reasonable to ask whether it's the only knot with hidden symmetries. It turns out that there are two dodecahedral knots which do - this can be seen as being related to the fact that these knots cover tetrahedral orbifolds.

(5/12)
Knot diagrams of the two dodecahedral knots. They are drawn so as to look like the knots stay along the edges of a regular dodecahedron.
August 20, 2025 at 7:09 PM
syncingsinking.bsky.social
Let's start with the figure-8 knot. It's a hyperbolic knot, meaning that its complement in S^3 is homeomorphic to the quotient of hyperbolic 3-space by a Kleinian group. There are many such knots - if you choose a knot at random with <15 crossings, it's highly likely to be hyperbolic.

(2/12)
The figure eight knot in blue. A knot with four crossing, located top left, top right, middle and bottom. Starting from top, the knot goes over top right, under the middle, over the bottom crossing, then loops around to go under top right, then over top left, under bottom, over middle, and under top left.
August 20, 2025 at 7:09 PM
syncingsinking.bsky.social
Man in a suit with Euclidean 3-space on his plate refusing a hyperbolic dodecahedron with caption "No! A responsible adult says no to non-Euclidean space"
August 19, 2025 at 6:27 AM