For *similar* or *scaled* tetrads, see
Scaled Tetrads for Polydrafters.

The smallest polydrafter tetrad, allowing cells off the polyiamond grid, uses a tetradrafter:

The smallest polydrafter with all cells on the polyiamond grid that forms a tetrad with some cells off the grid is this hexadrafter:

The smallest symmetric polydrafter that forms a tetrad is this extended hexadrafter:

The smallest polydrafters on the polyiamond grid that form tetrads on the grid are these octadrafters:

*Last revised 2020-03-17.*

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Col. George Sicherman [ HOME | MAIL ]