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| The On-line Journal for Mathematical Recreations
© 2001 2006 G. P. Jelliss and contributing authors Offshoots: Games |
Issue 45 ... |
Issue 44: Covering Surfaces by Polyominoes A study by Jacques Haubrich. Brief History. Three Fundamental Problems. Rectangular Solids to Cover (10 to 60 unit squares). Other Surfaces. |
Issue 43: Knight's Tours in 3 Dimensions A study by Awani Kumar. Tours in cuboids of 24, 32, 36 cells, And in cubes of 64, 216 and 512 cells. Including magic properties. |
Issue 42: Magic Tours & Forms
Magic Knight's Tours 12 by 12. Magic and Latin Squares. Magic Octahedron & Cuboctahedron. Magic Space Compass. Dozenal Sudoku and Kakuro. |
Issue 41: Diamond Solitaire
A study by George Bell. Introduction; General Boards with Super-Sweeps; Rhombus(6); Maximal Sweeps on Rhombus(6i); Conclusions. |
Issue 40: Chesspiece Arrays
Part 5 The Eight Officers (1) Introduction, (2) Unguard Arrangements, (3) Coverings, (4) Packings, (5) Other Problems. |
Issue 39: Chesspiece Arrays
Part 4 Multiple Unguard Arrangements (1) Introduction, (2) Two Types, (3) Three Types, (4) Four or Five Types, (5) Other Multiple Arrangements. |
Issue 38: Chesspiece Arrays
Part 3 Coverings (1) Introduction, (2) Leapers, (3) Riders, (4) Compound Riders, (5) Other Pieces. |
Issue 37: Chesspiece Arrays
Part 2 Unguards with Riders (1) Introduction, (2) Riders, (3) Compound Riders, (4) Composite Riders, (5) Hoppers. |
Issue 36: Triangular Peg Solitaire Unlimited A study by George Bell. Introduction; Maximal Sweeps on Odd / Even Triangular Boards; Long Sweeps on Arbitrarily Large Boards; Short Solutions. | Issue 35: Squaring the Square A study by T. H. Willcocks. On a more general case of this problem including a pair of equal squares, or two such pairs. |
Issue 34: Chesspiece Arrays
, Part 1 Unguards with Leapers (1) Introduction. (2) Free-leapers. (3) Half-free leapers. (4) Bound leapers. (5) Compound leapers. |
Issue 33: Rectangle-Square Dissections A study by Chris Tylor. Introduction; Continua of general solutions. Families of orthogonal solutions. Irregular solutions. Conclusion. | Issue 32: Magic Tours 12*12 reentrant, 4-fold cyclic, one diagonal magic. A study by Awani Kumar. Introduction. Even Diagonal. Even and Broken Diagonals. Odd Diagonal. Some Open Tours. | Issue 31: Solutions (56) Cents and Sensitivity. (57), (58) Bishop Paths. (59) Mao and Moa. (60) Corridors of Power. (61) Pythagorean Dissections. (62) 3-colour Tetrahedron. (63) Holey Cube. (64) Shaped Boards. (65) Plantations. |
Issue 30: Puzzles (56) Cents and Sensitivity. (57), (58) Bishop Paths. (59) Mao and Moa. (60) Corridors of Power. (61) Pythagorean Dissections. (62) 3-colour Tetrahedron. (63) Holey Cube. (64) Shaped Boards. (65) Plantations. |
Issue 29: Circling Squares (51) Introduction and Problems. (52) Circles Centred at Grid Points. (53) Circles at Half-Fraction Grid Points. (54) Higher Fractions and Larger Boards. (55) Circles Among the Lattice Points. |
Issue 28: Solitaire (46) Introduction and historical update. (47) The 6×6 board: work of John Harris. (48) Solutions on 33- and 37-hole boards. (49) Generalized cross and long-arm boards. (50) Five new problems for solution. |
Issue 27: Arithmetic (41) In the Footsteps of Eratosthenes. (42) Prime Number Arrangements. (43) Positional Numeration. (44) Altairian Arithmetic. (45) Automorphic Cubes. |
Issue 26: Magic Tours (36) In Search of 12x12 Magic Square Tours. (37) Four Perfect Magic Tours 12x12. (38) A New Type of Magic Tour. (39) Emperor Magic Tours. (40) Quasi-Magic Tours. |
Issue 25: Magic Tours (31) Semimagic 10×10 Quaternary Tour. (32) A New 8×8 Magic Knight Tour. (33) Another New 8×8 Magic Knight Tour. (34) Methods of Search for Magic Tours. (35) Existence Proofs. Obituaries |
Issue 24 (26) Raja of Mysore's Tour and Related. (27) New 'Almost Perfect' Magic Tours. (28) Two Tours Nearest to 'Perfection'. (29) A Tour by Murray and Related Tours. (30) Enumeration of Magic Tours. |
Issue 23 (21) Equidirectional Knight's Tour. (22) Thirteenth Month and Zodiac Sign. (23) Space Compass for Constellations. (24) Bode's Law Revisited. (25) Ratios and Continued Fractions. |
Issue 22 (16) A Self-Referential Sentence. (17) Triangle Trisections. (18) Hexagonal Dissections. (19) Polycubes. (20) Magic Tours on Special Boards. |
Issue 21 (11) A Knight's Tour Font. (12) Celtic Tours. (13) 3×n Celtic Tours. (14) Five-fold Intersected Moves. (15) Knight's Tour Mosaics. |
Issue 20 (6) Longest Shortest Leaper Paths. (7) Nightrider Tours: no Knight Moves. (8) The Tree of Life and Factors of Sixty. (9) Trapezoidal Tours. (10) Reciprocating Fractions. |
Issue 19 (1) Magic squares using alternating moves. (2) History of alternating tours. (3) Doubled alternating tours. (4) Tripled alternating tours. (5) Figured tours: Primes guarded by queen. |
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