chemoelectric

/*

  The hiha programming language

  Copyright © 2026 Barry Schwartz

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

chemoelectric

# Copyright (C) 2025 Barry Schwartz
# 
# Copying and distribution of this file, with or without modification,
# are permitted in any medium without royalty provided the copyright
# notice and this notice are preserved.  This file is offered as-is,
# without any warranty.

# serial 2

# chem_unique_id([CHEM_UNIQUE_ID([VAR])

chemoelectric

#!/usr/bin/env scheme-r7rs
(import (scheme base)
        (scheme list)
        (scheme write)
        (scheme process-context))

;;; Generate solutions to the n-queens problem.
;;;
;;; This implementation is based *very* closely on a Fortran solution
;;; by Barry Schwartz, and in turn *extremely* loosely on the public

chemoelectric

--********************************************************************
-- This is free and unencumbered software released into the public domain.

-- Anyone is free to copy, modify, publish, use, compile, sell, or
-- distribute this software, either in source code form or as a compiled
-- binary, for any purpose, commercial or non-commercial, and by any
-- means.

-- In jurisdictions that recognize copyright laws, the author or authors
-- of this software dedicate any and all copyright interest in the