Problem Display
PID: 236479 (b2Q4/r5p1/8/1Prp2p1/np1p2N1/1BkPp3/P1N5/K2R4 w - - 0 1)

Shifrin, Semion

Variantim, 2018

b2Q4/r5p1/8/1Prp2p1/np1p2N1/1BkPp3/P1N5/K2R4

#3

9 + 11


SOLUTION


  • SOUND
  • Sets
    • 1...Ra5
      • 2.Sa3
        • threat
          • 3.Sb1#
        • 2...bxa3
          • 3.Qxa5#
    • 1...Rb7
      • 2.Sa3
        • threat
          • 3.Sb1#
        • 2...bxa3
          • 3.Qa5#
    • 1...Rd7
      • 2.Sa3
        • threat
          • 3.Sb1#
        • 2...bxa3
          • 3.Qa5#
    • 1...Re7
      • 2.Sa3
        • threat
          • 3.Sb1#
        • 2...bxa3
          • 3.Qa5#
    • 1...Rf7
      • 2.Sa3
        • threat
          • 3.Sb1#
        • 2...bxa3
          • 3.Qa5#
    • 1...g6
      • 2.Sxd4
        • threat
          • 3.Se2#
        • 2...Kxd4
          • 3.Qf6#
        • 2...e2
          • 3.Sxe2#
  • Tries
    • 1.Sxd4?
      • threat
        • 2.Se2#
      • 1...e2
        • 2.Sxe2#
      • 1...Kxd4!
    • 1.Qa5?
      • threat
        • 2.Qxb4#
      • 1...Rxb5
        • 2.Sa3
          • threat
            • 3.Sb1#
            • 3.Sxb5#
      • 1...Rc4
        • 2.Sa3
          • threat
            • 3.Sb1#
      • 1...Rxa5!
    • 1.Qf6?
      • threat
        • 2.Qxd4#
      • 1...Rc4
        • 2.Qf1
          • threat
            • 3.Qe1#
      • 1...gxf6!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Se4+
          • 2...dxe4
            • 3.Qxd4#
      • 1...gxf6
        • 2.Sxd4
          • threat
            • 3.Se2#
          • 2...Kxd4
            • 3.Qxf6#
          • 2...e2
            • 3.Sxe2#
      • 1...Rc4
        • 2.Qxd5
          • threat
            • 3.Se4#
            • 3.Qxc4#
          • 2...Bxd5
            • 3.Sxd5#
      • 1...Rd7
        • 2.Sa3
          • threat
            • 3.Sb1#
          • 2...bxa3
            • 3.Qa5#
      • 1...Re7
        • 2.Sa3
          • threat
            • 3.Sb1#
          • 2...bxa3
            • 3.Qa5#

FEATURES


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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).