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.Dd $Mdocdate: September 8 2014 $ .Dt BS 6 .Os .Sh NAME .Nm bs .Nd battleships game .Sh SYNOPSIS .Nm bs .Op Fl b | s .Op Fl c .Sh DESCRIPTION This program allows you to play the familiar Battleships game against the computer on a 10x10 board. The interface is visual and largely self-explanatory; you place your ships and pick your shots by moving the cursor around the .Sq sea with the .Xr hack 6 motion keys .Em hjklyubn .
p Note that when selecting a ship to place, you must type the capital letter (these are, after all, capital ships). During ship placement, the .Sq r command may be used to ignore the current position and randomly place your currently selected ship. The .Sq R command will place all remaining ships randomly. The ^L command
q form feed, ASCII 12 will force a screen redraw.
p The command-line arguments control game modes: l -tag -width XxXXX t Fl b Selects a .Sq blitz variant. This allows a side to shoot for as long as it continues to score hits. t Fl c Permits ships to be placed adjacently. Normally, ships must be separated by at least one square of open water. This disables that check and allows them to close-pack. t Fl s Selects a .Sq salvo variant. This allows players one shot per turn for each of their ships still afloat. This puts a premium on scoring hits early and knocking out some ships and also makes it much harder, for example, when you face a superior force with only your PT-boat. .El .Sh AUTHORS .An -nosplit Originally written by one .An Bruce Holloway in 1986. Salvo mode added by .An Chuck A. DeGaul Aq Mt cbosgd!cad . Visual user interface, .Sq closepack option, code rewrite and manual page by .An Eric S. Raymond Aq Mt esr@snark.thyrsus.com , August 1989. .Sh NOTES The algorithm the computer uses once it has found a ship to sink is provably optimal. The dispersion criterion for the random-fire algorithm may not be.