A Yahtzee variation. (author unknown).
The 3 sets of 5 squares mentioned on the right (row, column, or diagonal) may be intersected by the same player and a third tile is placed over the intersection. Only one intersection is allowed per player. There are no 'small straights', however, a 'lucky 7' and 'lucky 11' are added (5 dice totals), as well as a bingo-type 'Free' center square. If a player is unable to cover a square after 3 dice rolls, that player may remove an opponent's tile from any of the 4 'large straight' squares, or any of the 12 'full house' squares - IF and ONLY IF all 4 'large straights' are covered, OR, all 12 'full house' squares are covered.
This game can be quite addictive and, similar to the Risk game, alliances are seen very early with 4 players - two ganging up on another who has had some lucky dice throws ... ;-)

A Sudoku variation.
I first started playing this puzzle when it was introduced in the mid 1970's in Logic Problems magazine by Dell Magazines. Creating a two player game was the next step and in this variation I used various theme pictures glued to wooden cubes. Being a retired airline employee, it was a 'natural' that I use Tail Fin logos for this set. The other 5 faces on the cubes use cartoon, hallowe'en, fruit, Xmas, and transportation themes - each selected by season, or mood - and, I don't need a pencil and eraser ;-)

My Go board.
I played this game back in the 1960's on a cardboard grid and produced this as my first wooden board game. Teak and Spruce wood were chosen. The game board size is 18" X 18" so it certainly was an improvement from an 8" X 8" grid. And No, my win/loss record did not improve ...