The N + k Queens Problem Pages
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Example Solutions

If you want to see some solutions to the N+k Queens Problem, look at the following files:
  • nopawn.pdf: A PDF file with pictures of the fundamental solutions to the N+0 Queens Problem for N=4,5,6,7,8,9, and 10.
  • onepawn.pdf: A PDF file with pictures of the fundamental solutions to the N+1 Queens Problem for N=6,7,8,9, and 10.
  • twopawn.pdf: A PDF file with pictures of the fundamental solutions to the N+2  Queens Problem for N=7,8,9, and 10.
  • threepawn.pdf: A PDF file with pictures of the fundamental solutions to the N+3  Queens Problem for N=8,9, and 10.
  • fourpawn.pdf: A PDF file with pictures of the fundamental solutions to the N+4  Queens Problem for N=9,10, and 11.
  • twopawngap.txt: A text file that gives some solutions to the N+2 Queens Problem for N between 11 and 100.
  • threepawngap.txt: A text file that gives some solutions to the N+3 Queens Problem for N between 8 and 100.

Solution Counts

If you want the number of solutions to the N+k Queens Problem for certain small N and k, try one of these links:
  • Solution Counts: Table providing (for some values of N and k) the number of ways to place N + k queens and k pawns on an N-by-N board so that no queens attack each other.
  • Amazon Solution Counts:  Table providing (for some values of N and k) the number of ways to place N+k amazons  and k pawns on an N-by-N board so that no amazons attack each other
  • http://oeis.org/search?q=chatham&language=english&go=Search Sequences contributed to the On-Line Encyclopedia of Integer Sequences.