Problem Display
PID: 20567 (brq5/4b1Pr/2R1p2p/3pQ1pk/5p2/4BK2/2B3NP/7n w - - 0 1)

Johnson, Richard Wright

Source?, 1873

brq5/4b1Pr/2R1p2p/3pQ1pk/5p2/4BK2/2B3NP/7n

#5

8 + 12


3713 Snap 2007

SOLUTION


  • SOUND
  • Keys
    • 1.Bb6!
      • threat
        • 2.Sxf4+
          • 2...Kh4
            • 3.Qe1+
              • 3...Sf2
                • 4.Bxf2#
                • 4.Qxf2#
              • 3...Sg3
                • 4.Qxg3#
                • 4.hxg3#
      • 1...Bb4
        • 2.Bd8
          • threat
            • 3.Qxf4
              • threat
                • 4.Qg4#
                • 4.Qf7#
              • 3...g4+
                • 4.Qxg4#
              • 3...gxf4
                • 4.Sxf4#
          • 2...Qxc6
            • 3.Bg6+
              • 3...Kxg6
                • 4.Qf6+
                  • 4...Kh5
                    • 5.Qf7#
          • 2...Bxc6
            • 3.Bg6+
              • 3...Kxg6
                • 4.Qf6+
                  • 4...Kh5
                    • 5.Qf7#
          • 2...Qa6
            • 3.Bg6+
              • 3...Kxg6
                • 4.Qf6+
                  • 4...Kh5
                    • 5.Qf7#
          • 2...Qd7
            • 3.Qxf4
              • threat
                • 4.Qg4#
              • 3...Sf2
                • 4.Qh4+
                  • 4...gxh4
                    • 5.Sf4#
          • 2...Rb7
            • 3.Qxf4
              • threat
                • 4.Qg4#
              • 3...Sf2
                • 4.Qh4+
                  • 4...gxh4
                    • 5.Sf4#
          • 2...Be1
            • 3.Sxf4+
              • 3...Kh4
                • 4.Qxe1+
                  • 4...Sf2
                    • 5.Qxf2#
                  • 4...Sg3
                    • 5.Qxg3#
                    • 5.hxg3#
            • 3.Bg6+
              • 3...Kxg6
                • 4.Qf6+
                  • 4...Kh5
                    • 5.Qf7#
          • 2...Bd2
            • 3.Bg6+
              • 3...Kxg6
                • 4.Qf6+
                  • 4...Kh5
                    • 5.Qf7#
          • 2...Ba3
            • 3.Sxf4+
              • 3...Kh4
                • 4.Qe1+
                  • 4...Sf2
                    • 5.Qxf2#
                  • 4...Sg3
                    • 5.Qxg3#
                    • 5.hxg3#
            • 3.Bg6+
              • 3...Kxg6
                • 4.Qf6+
                  • 4...Kh5
                    • 5.Qf7#
          • 2...Ba5
            • 3.Bg6+
              • 3...Kxg6
                • 4.Qf6+
                  • 4...Kh5
                    • 5.Qf7#
          • 2...Bc5
            • 3.Bg6+
              • 3...Kxg6
                • 4.Qf6+
                  • 4...Kh5
                    • 5.Qf7#
          • 2...Bd6
            • 3.Sxf4+
              • 3...Kh4
                • 4.Qe1+
                  • 4...Sf2
                    • 5.Qxf2#
                  • 4...Sg3
                    • 5.Qxg3#
                    • 5.hxg3#
            • 3.Bg6+
              • 3...Kxg6
                • 4.Qf6+
                  • 4...Kh5
                    • 5.Qf7#
          • 2...Be7
            • 3.Sxf4+
              • 3...Kh4
                • 4.Qe1+
                  • 4...Sf2
                    • 5.Qxf2#
                  • 4...Sg3
                    • 5.Qxg3#
                    • 5.hxg3#
          • 2...Bf8
            • 3.Sxf4+
              • 3...Kh4
                • 4.Qe1+
                  • 4...Sf2
                    • 5.Qxf2#
                  • 4...Sg3
                    • 5.Qxg3#
                    • 5.hxg3#
            • 3.Bg6+
              • 3...Kxg6
                • 4.Qf6+
                  • 4...Kh5
                    • 5.Qf7#
          • 2...Sf2
            • 3.Bg6+
              • 3...Kxg6
                • 4.Qf6+
                  • 4...Kh5
                    • 5.Qf7#
            • 3.g8Q
              • threat
                • 4.Bg6#
                • 4.Qg6#
              • 3...Rg7
                • 4.Qe8+
                  • 4...Rg6
                    • 5.Bxg6#
                    • 5.Qxg6#
                  • 4...Rf7
                    • 5.Qxf7#
                • 4.Qgxg7
                  • threat
                    • 5.Bg6#
                    • 5.Qg6#
                    • 5.Qf7#
              • 3...Sd3
                • 4.Qexg5+
                  • 4...hxg5
                    • 5.Qxh7#
                    • 5.Qxg5#
                • 4.Qgxg5+
                  • 4...hxg5
                    • 5.Qxg5#
                • 4.Qe8+
                  • 4...Rf7
                    • 5.Qxf7#
              • 3...Se4
                • 4.Qe8+
                  • 4...Rf7
                    • 5.Qxf7#
          • 2...d4
            • 3.Bg6+
              • 3...Kxg6
                • 4.Qf6+
                  • 4...Kh5
                    • 5.Qf7#
      • 1...Bc5
        • 2.Sxf4+
          • 2...Kh4
            • 3.Qe1+
              • 3...Bf2
                • 4.Bxf2+
                  • 4...Sxf2
                    • 5.Qxf2#
                  • 4...Sg3
                    • 5.Bxg3#
                    • 5.hxg3#
                • 4.Qxf2+
                  • 4...Sxf2
                    • 5.Bxf2#
                  • 4...Sg3
                    • 5.Qxg3#
                    • 5.hxg3#
              • 3...Sf2
                • 4.Qxf2+
                  • 4...Bxf2
                    • 5.Bxf2#

Anticipated by 20551(1862)

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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).