Abaku

Abaku is a crossword-style tile-placement game for 1–4 players. Players place number tiles horizontally or vertically to create intersecting arithmetic equations. Operation signs and equals signs are not placed on the board; the mathematical relationships are read directly from the sequence of digits. For example, 112 can represent 1 + 1 = 2, while 248 can represent 2 × 4 = 8. On each turn, a player adds one or more tiles to the existing layout. Every new sequence created by the placement must