Part I. Puzzles and brainteasers. The cyclic prisoners / Peter Winkler ; Dragons and Kasha / Tanya Khovanova ; The history and future of logic puzzles / Jason Rosenhouse ; The tower of Hanoi for humans / Paul K. Stockmeyer ; Frenicle's 880 magic squares / John Conway, Simon Norton, and Alex Ryba
Part II. Geometry and topology. A triangle has eight vertices but only one center / Richard K. Guy ; Enumeration of solutions to Gardner's paper cutting and folding problem / Jill Bigley Dunham and Gwyneth R. Whieldon ; The color cubes puzzle with two and three colors / Ethan Berkove, David Cervantes-Nava, Daniel Condon, Andrew Eickemeyer, Rachel Katz, and Michael J. Schulman ; Tangled tangles / Erik D. Demaine, Martin L. Demaine, Adam Hesterberg, Quanauan Liu, Ron Taylor, and Ryuhei Uehara
Part III. Graph theory. Making walks count : from silent circles to Hamiltonian cycles / Max A. Alekseyev and Gérard P. Michon ; Duels, truels, gruels, and survival of the unfittest / Dominic Lanphier ; Trees, trees, so many trees / Allen J. Schwenk ; Crossing numbers of complete graphs / Noam D. Elkies
Part IV. Games of chance. Numerically balanced dice / Robert Bosch, Robert Fathauer, and Henry Segerman ; A TROUBLE-some simulation / Geoffrey D. Dietz ; A sequence game on a Roulette wheel / Robert W. Vallin
Part V. Computational complexity. Multinational war is hard / Jonathan Ward ; Clickomania is hard, even with two colors and columns / Aviv Adler, Erik D. Demaine, Adam Hesterberg, Quanquan Liu, and MIkhail Rudoy ; Computational complexity of arranging music / Erik D. Demaine and William S. Moses.
