Problem Display
PID: 173224 (3R4/8/8/4K3/3Q3p/6pp/8/7k w - - 0 1)

Howard, David M

Problem Observer, 1997

3R4/8/8/4K3/3Q3p/6pp/8/7k

#3

3 + 4


6490 yacpdb 2018

SOLUTION


  • SOUND
  • Tries
    • 1.Qb2?
      • threat
        • 2.Rd1#
      • 1...Kg1
        • 2.Rd1#
      • 1...g2!
    • 1.Qf2?
      • threat
        • 2.Rd1#
      • 1...g2
        • 2.Rd1+
          • 2...Kh2
            • 3.Qf4#
          • 2...g1Q
            • 3.Rxg1#
            • 3.Qxg1#
          • 2...g1S
            • 3.Rxg1#
            • 3.Qxg1#
          • 2...g1B
            • 3.Rxg1#
            • 3.Qxg1#
          • 2...g1R
            • 3.Rxg1#
            • 3.Qxg1#
      • 1...gxf2!
    • 1.Qd1+?
      • 1...Kg2
        • 2.Rd2#
      • 1...Kh2!
    • 1.Qe4+?
      • 1...Kh2
        • 2.Rd1
          • 2...g2
            • 3.Qf4#
      • 1...g2
        • 2.Rd1+
          • 2...Kh2
            • 3.Qf4#
      • 1...Kg1!
    • 1.Qg4?
      • 1...Kg2
        • 2.Rd2+
          • 2...Kf1
            • 3.Qd1#
          • 2...Kg1
            • 3.Qd1#
          • 2...Kh1
            • 3.Qd1#
        • 2.Qe2+
          • 2...Kg1
            • 3.Rd1#
          • 2...Kh1
            • 3.Rd1#
      • 1...Kh2
        • 2.Rd1
          • 2...Kg2
            • 3.Qe2#
          • 2...g2
            • 3.Qf4#
      • 1...g2
        • 2.Rd1+
          • 2...Kh2
            • 3.Qf4#
          • 2...g1Q
            • 3.Qxh3#
            • 3.Qxg1#
          • 2...g1S
            • 3.Qxh3#
            • 3.Qxg1#
          • 2...g1B
            • 3.Qxh3#
            • 3.Qxg1#
          • 2...g1R
            • 3.Qxh3#
            • 3.Qxg1#
      • 1...h2
        • 2.Rd2
          • threat
            • 3.Qd1#
          • 2...Kg1
            • 3.Qd1#
          • 2...g2
            • 3.Qxg2#
        • 2.Qf3+
          • 2...Kg1
            • 3.Rd1#
          • 2...g2
            • 3.Rd1#
      • 1...Kg1!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Rd1+
          • 2...Kg2
            • 3.Qe2#
          • 2...Kh2
            • 3.Qg1#
      • 1...Kg2
        • 2.Qe2+
          • 2...Kg1
            • 3.Rd1#
          • 2...Kh1
            • 3.Rd1#
      • 1...Kh2
        • 2.Rd1
          • threat
            • 3.Qg1#
          • 2...Kg2
            • 3.Qe2#
          • 2...g2
            • 3.Qf4#
      • 1...g2
        • 2.Rd1+
          • 2...Kh2
            • 3.Qf4#
          • 2...g1Q
            • 3.Qxg1#
            • 3.Qxh3#
          • 2...g1S
            • 3.Qxg1#
            • 3.Qxh3#
          • 2...g1B
            • 3.Qxg1#
            • 3.Qxh3#
          • 2...g1R
            • 3.Qxg1#
            • 3.Qxh3#
      • 1...h2
        • 2.Qf3+
          • 2...Kg1
            • 3.Rd1#
          • 2...g2
            • 3.Rd1#

FEATURES


NOT CLASSIFIED


Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).