Problem Display
PID: 142734 (7K/3p4/6Q1/4k3/3q1N2/2B2P2/5P2/R7 w - - 0 1)

Toz, M

Illustrated London News, 0000

7K/3p4/6Q1/4k3/3q1N2/2B2P2/5P2/R7

#2

7 + 3


158 Brentano's Chess Monthly 1881

SOLUTION


  • SOUND
  • Sets
    • 1...d5
      • 2.Sd3#
    • 1...d6
      • 2.Qg5#
  • Tries
    • 1.Bxd4+?
      • 1...Kxf4
        • 2.Qg4#
        • 2.Qf6#
      • 1...Kxd4!
    • 1.Rd1?
      • 1...Qxc3
        • 2.Qg5#
      • 1...d5
        • 2.Sd3#
      • 1...d6
        • 2.Qg5#
      • 1...Kxf4+!
    • 1.Ra5+?
      • 1...d5
        • 2.Sd3#
      • 1...Kxf4+!
    • 1.Ra6?
      • threat
        • 2.Qe4#
        • 2.Qg5#
        • 2.Qf6#
      • 1...Qxc3
        • 2.Qe4#
        • 2.Qf6#
      • 1...d5
        • 2.Sd3#
        • 2.Qg5#
        • 2.Qf6#
      • 1...d6
        • 2.Qg5#
      • 1...Kxf4+!
  • Keys
    • 1.Ra4!
      • 1...Kxf4+
        • 2.Qf6#
      • 1...Qxc3
        • 2.Re4#
      • 1...d5
        • 2.Sd3#
      • 1...d6
        • 2.Qg5#

FEATURES


  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::S(E)
    • P(c);SBLOCK::QAR2(F)
  • Tries
    • Try
      • B(C);CHECK,XQ(a)
      • Refutation
        • K(b);S_FLIGHT,XB(C)
    • Try
      • R(A);
      • Vars
        • Q(a);N_SPINQ(a),XB(C)::QAR2(F)
        • P(c);SBLOCK::S(E)
        • P(c);SBLOCK::QAR2(F)
      • Refutation
        • K(b);CHECK,N_SPINQ(a),S_FLIGHT,XS(E)
    • Try
      • R(A);CHECK
      • Vars
        • P(c);P_SPINP(c)::S(E)
      • Refutation
        • K(b);CHECK,N_SPINQ(a),S_FLIGHT,XS(E)
    • Try
      • R(A);
      • Threat
        • DUALS(3)
      • Vars
        • P(c);::QAR2(F)
      • Refutation
        • K(b);CHECK,N_SPINQ(a),S_FLIGHT,XS(E)
  • Actual
    • R(A);
    • Vars
      • K(b);CHECK,S_FLIGHT,XS(E)::QAR2(F)
      • Q(a);N_SPINQ(a),OGATE,XB(C)::R1(A)
      • P(c);SBLOCK::S(E)
      • P(c);SBLOCK::QAR2(F)


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).