Math Magic Chronological Archive
1998
Divisor Chains
(November 1998)
updated 5/26/03
Integer Square Tilings
(December 1998)
updated 10/16/07
1999
Angle Frequencies
(January 1999)
updated 1/28/99
Disconnected Polyominoes
(February 1999)
updated 3/3/99
Average Arrays
(March 1999)
updated 3/7/99
Convex Spectra
(April 1999)
updated 6/7/04
Surround Numbers
(May 1999)
updated 3/5/02
Palindrome Products
(June 1999)
updated 7/7/07
Fairy Chess Endgames
(July 1999)
updated 4/20/01
Rectangles in Squares
(August 1999)
updated 7/9/07
Square Matrices
(September 1999)
updated 10/5/99
Stacking Squares Vertically
(October 1999)
updated 7/16/07
Non-monochromatic Cliques
(November 1999)
updated 11/25/99
Single Digit Formulas
(December 1999)
updated 12/15/02
2000
Bracing Polygons
(January 2000)
updated 10/1/06
Adding Digits Pairwise
(February 2000)
updated 4/26/05
Longest Sokoban Games
(March 2000)
updated 3/10/01
Packing Two Square Sizes
(April 2000)
updated 8/1/07
Counting Domino Tilings
(May 2000)
updated 1/15/05
Problems with L's
(June 2000)
updated 3/14/05
Cayley Graphs of
Sliding Puzzles
(July 2000)
updated 7/22/00
Friedman Numbers
(August 2000)
updated 4/3/08
Covering Squares
(September 2000)
updated 12/15/02
Graphs with
No 4-Cycles
(October 2000)
updated 5/26/03
Variants of Nim
(November 2000)
updated 4/22/07
Power Products
(December 2000)
updated 12/14/00
2001
Packing Two Polyminoes
(January 2001)
updated 2/3/01
Chess Placement and
Sliding Puzzles
(February 2001)
updated 11/18/03
Linear Polyominoes
(March 2001)
updated 3/24/01
Adjacency Graphs
for Polygons
(April 2001)
updated 12/21/02
Getting to Two
(May 2001)
updated 5/30/01
Printer Errors
(June 2001)
updated 6/16/07
Tilings with N Neighbors
(July 2001)
updated 8/12/01
Squaring and Striking
(August 2001)
updated 8/31/01
Counting Square Tilings
(September 2001)
updated 10/9/01
Entangled Polyominoes
(October 2001)
updated 12/21/02
Robot Rooms
(November 2001)
updated 11/13/01
Square Strip Tilings
(December 2001)
updated 12/21/02
2002
Square Crosswords
(January 2002)
updated 1/27/02
Modular Sum Matrices
(February 2002)
updated 1/5/03
Minimal Critical Circuits
(March 2002)
updated 1/6/03
Packing Consecutive L's
(April 2002)
updated 4/30/02
Square Root Approximations
(May 2002)
updated 5/18/02
Diverse Square Tilings
(June 2002)
updated 7/28/02
Fair 2 Game Schedules
(July 2002)
updated 8/9/02
Partridge Packings
(August 2002)
updated 9/12/02
Cellular Growth Model
(September 2002)
updated 9/12/02
Irreptiles
(October 2002)
updated 8/5/03
Sum-Product Matrices
(November 2002)
updated 11/20/02
Consecutive Aspect
Ratio Squares
(December 2002)
updated 12/15/02
2003
Mathematical Cellular Automata
(January 2003)
updated 1/17/03
Home Plate Tilings
(February 2003)
updated 2/16/03
Triangular Polyhex Tilings
(March 2003)
updated 4/14/03
Efficient Stamps
(April 2003)
updated 10/14/06
Snake Squares
(May 2003)
updated 2/10/07
Multiple Matrices
(June 2003)
updated 6/21/03
Stacking L's
(July 2003)
updated 11/2/03
Squaring and Adding
(August 2003)
updated 11/15/03
Pairwise Touching Polycubes
(September 2003)
updated 9/11/03
Power Towers
(October 2003)
updated 10/26/03
More Square Problems
(November 2003)
updated 6/19/05
Honest Numbers
(December 2003)
updated 1/10/04
2004
Packing Squares
of Area n
(January 2004)
updated 6/30/05
Number Constellations
(February 2004)
updated 3/8/04
Thunderball
(March 2004)
updated 4/5/04
Strobogrammatic
Expressions
(April 2004)
updated 4/23/06
Digit Isogrids
(May 2004)
updated 5/25/04
Packing Aspect
Ratio Rectangles
(June 2004)
updated 6/7/04
Packing Sequences
(July 2004)
updated 8/6/04
Small Digit Approximations
(August 2004)
updated 3/24/08
Polypolyforms
(September 2004)
updated 6/8/07
Repeating Blocks
in Squares
(October 2004)
updated 10/31/04
Multiple Tiling Numbers
(November 2004)
updated 6/29/07
Neighborly Tilings
(December 2004)
updated 12/28/04
2005
Ambiguous Products
(January 2005)
updated 1/31/05
Tiling Rectangles
With U's
(February 2005)
updated 3/29/05
Non-Attacking Bishops
(March 2005)
updated 4/26/05
Areas of Rigid Tents
(April 2005)
updated 4/29/05
Balanced Consecutive Tilings
(May 2005)
updated 6/7/05
Generalized Reptiles
(June 2005)
updated 6/30/05
No-Touch Tilings
(July 2005)
updated 7/30/05
Trivial Knight Tours
(August 2005)
updated 1/4/07
Yet More Square Problems
(September 2005)
updated 9/29/05
Some Circle Problems
(October 2005)
updated 7/14/07
Shapes Touching
n Others
(November 2005)
updated 11/29/05
Problems with Points
(December 2005)
updated 11/30/06
2006
Sub-Partridge
Rectangle Tilings
(January 2006)
updated 1/31/06
Some Graph Problems
(February 2006)
updated 2/14/06
Playing Card Problems
(March 2006)
updated 9/25/06
Packing Polyominoes
in Larger Copies
(April 2006)
updated 2/17/08
Tiling Triangles,
Pyramids, and Diamonds
(May 2006)
updated 9/23/06
The Tetromino
Placement Game
(June 2006)
updated 6/12/06
Attacking Each
Square n Times
(July 2006)
updated 3/13/07
Polypolylines
(August 2006)
updated 5/11/07
Unique Path Puzzles
(September 2006)
updated 9/25/06
Tree-Like Buildings
(October 2006)
updated 12/3/06
Polyomino Addition
(November 2006)
updated 12/6/07
Polygon Triangulation
(December 2006)
updated 9/21/07
2007
Polyomino Intersections
(January 2007)
updated 1/15/07
Pieces Attacking
Each Other
(February 2007)
updated 3/17/07
Tiling Cornerless Rectangles
(March 2007)
updated 3/31/07
Chess Attack Loops
(April 2007)
updated 4/22/07
Magic Polyomino Squares
(May 2007)
updated 5/30/07
Anti-Partridge Tilings
(June 2007)
updated 7/2/07
Non-Attacking Rook Tours
(July 2007)
updated 7/25/07
Stacking Squares Horizontally
(August 2007)
updated 8/30/07
Seeing An Equal
Number of Squares
(September 2007)
updated 9/21/07
The Game Of Blob
(October 2007)
updated 10/28/07
Substring Iteration
(November 2007)
updated 11/13/07
Loops Of Squares
In Rectangles
(December 2007)
updated 12/23/07
2008
Tiling Frames
(January 2008)
updated 2/17/08
Placing Circles To
Obstruct Circles
(February 2008)
updated 3/3/08
N
th
Powers
With N Digits
(March 2008)
updated 3/12/08
Packing Pieces
in Polyominoes
(April 2008)
updated 4/30/08
Fitting Inside Two
Different Squares
(May 2008)
updated 5/11/08
