Block Five積み五目

Gomoku with falling-block pieces: four stones each, two of each colour.

Our own game. The seven four-square shapes, coloured two and two, in a queue both players share.

Inspired by the seven tetromino shapes. The name belongs to its owner; this is our own version of the rules.

Object目的

A square board of 13, 15, 19 lines; 13×13 by default.
A shared queue of the seven four-square shapes, each holding two black and two white stones, drawn at random from the game's seed. Both players draw the same run and see the next three.

Each turn you lay the next piece in the queue, turned or flipped as you like, on empty points.
Instead of a piece you may lay a single stone of your own colour; each player has 6 for the game.
A piece carries both colours, so it can finish a line for either side; the line's owner wins whoever laid it, and a line for each at once is a draw.
If nothing fits, the turn passes; two passes in a row end the game as a draw.
A full board with no line is a draw.

Either colour may open, or the first stone may be drawn by lot.
The threat reading, hints and the chance-of-winning bar are switched off: stones move after they are placed, so a line-by-line reading says nothing true.
15×15 by default; 19×19 gives the shapes room.