Fewest blocks

A standard 15 by 15 puzzle has 225 total squares. In general, the fewer the blocks (black squares) the more difficult the puzzle is to solve and certainly to create.

All puzzles with 24 or fewer blocks are shown. The fact that there are puzzles here with fewer than 20 is astounding. (thumbnails)

17 blocks
Friday, July 27, 2012Joe Krozel
Friday, March 15, 2013Joe Krozel
Saturday, August 7, 2010Joe Krozel
Friday, August 22, 2008Kevin G. Der
Friday, April 24, 2015Joe Krozel
Saturday, January 7, 2012Joe Krozel
Friday, February 5, 2010Joe Krozel
Friday, September 4, 2009Joe Krozel
Saturday, March 28, 2009Joe Krozel
Friday, March 11, 2005Manny Nosowsky
Friday, July 30, 2010Kevin G. Der
Friday, January 19, 2001Joe DiPietro
Friday, January 31, 2014Chris A. McGlothlin
Friday, March 22, 2013Tim Croce
Saturday, October 6, 2012Steve Salitan
Friday, August 7, 2009Manny Nosowsky
Friday, April 11, 2008Manny Nosowsky
Friday, February 15, 2008Patrick Berry
Friday, February 3, 2006Manny Nosowsky
Saturday, January 7, 2006Jim Hyres
Friday, August 12, 2005Manny Nosowsky
Friday, June 17, 2005Manny Nosowsky
Friday, February 11, 2005Manny Nosowsky
Friday, August 20, 2004Harvey Estes
Saturday, July 12, 2003Manny Nosowsky
Saturday, October 7, 2000Chuck Menning
Friday, January 7, 2000Manny Nosowsky
Friday, July 24, 1998Manny Nosowsky
Saturday, September 28, 2013Joe Krozel
Saturday, March 27, 2004Sherry O. Blackard
Friday, January 10, 2003Manny Nosowsky
Saturday, October 17, 2015Timothy Polin
Saturday, February 7, 2015Byron Walden
Saturday, August 29, 2009Doug Peterson
Friday, February 1, 2008Doug Peterson
Saturday, March 25, 2006Byron Walden
Saturday, October 8, 2005Byron Walden
Saturday, September 24, 2005Byron Walden
Friday, October 22, 2004Patrick Berry
Friday, June 25, 2004Manny Nosowsky
Saturday, March 29, 2003Michael Shteyman
Saturday, May 16, 2015Byron Walden
Saturday, May 31, 2014John Lampkin
Saturday, August 6, 2011Joe Krozel
Saturday, May 8, 2010Mark Diehl
Friday, June 5, 2009Martin Ashwood-Smith
Saturday, April 18, 2009Byron Walden
Saturday, November 22, 2008Frank Longo
Saturday, October 18, 2008Brad Wilber
Saturday, December 29, 2007Bob Klahn
Saturday, April 14, 2007Sherry O. Blackard
Saturday, March 17, 2007John Farmer
Saturday, November 25, 2006Sherry O. Blackard
Friday, November 3, 2006Manny Nosowsky
Saturday, July 29, 2006Bob Klahn
Saturday, May 6, 2006James E. Buell
Saturday, April 8, 2006Patrick Berry
Saturday, August 27, 2005Byron Walden
Saturday, February 5, 2005Sherry O. Blackard
Friday, January 14, 2005Manny Nosowsky
Friday, December 24, 2004Sherry O. Blackard
Friday, June 4, 2004Sherry O. Blackard
Friday, June 27, 2003Manny Nosowsky
Friday, October 18, 2002Manny Nosowsky
Saturday, December 23, 2000Bob Klahn
Saturday, November 25, 2000Patrick D. Berry
Saturday, October 21, 2000Bob Klahn
Friday, February 18, 2000Manny Nosowsky
Saturday, October 9, 1999Manny Nosowsky
Saturday, January 23, 1999Frank Longo