MESON Chess Problem Database

Problem Display
PID: 156409 (6K1/7N/6kN/6r1/8/7Q/8/8 w - - 0 1)

Subotic, Miroslav

Best Problems, 2006

6K1/7N/6kN/6r1/8/7Q/8/8

#2

4 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Rh5
      • 2.Qe6#
  • Tries
    • 1.Qg4?
      • threat
        • 2.Qxg5#
      • 1...Kxh6+
        • 2.Qxg5#
      • 1...Rxg4!
    • 1.Qf5+?
      • 1...Kh5+
        • 2.Qxg5#
      • 1...Kxh6+
        • 2.Qxg5#
      • 1...Rxf5!
    • 1.Qh4?
      • threat
        • 2.Qxg5#
      • 1...Rh5
        • 2.Qf6#
      • 1...Rg1
        • 2.Sf8#
      • 1...Rg2
        • 2.Sf8#
      • 1...Rg3
        • 2.Sf8#
      • 1...Rg4
        • 2.Sf8#
      • 1...Ra5
        • 2.Sf8#
      • 1...Rb5
        • 2.Sf8#
      • 1...Rc5
        • 2.Sf8#
      • 1...Rd5
        • 2.Sf8#
      • 1...Re5
        • 2.Sf8#
      • 1...Rf5!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Sh8#
      • 1...Rg4
        • 2.Qxg4#
      • 1...Rh5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(a);SBLOCK::QAR2(A)
  • Tries
    • Try
      • Q(A);P_PINR(a)
      • Threat
        • QAR1(A),XR(a)
      • Vars
        • K(b);CHECK,N_SPINR(a),P-FLIGHT,XS(B)::QAB1(A),XR(a)
      • Refutation
        • R(a);N_SPINR(a),XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);CHECK,P_SPINR(a),S_FLIGHT::QAR1(A),XR(a)
        • K(b);CHECK,P-FLIGHT,XS(B)::QAB1(A),XR(a)
      • Refutation
        • R(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XR(a)
      • Vars
        • R(a);OGATE,SBLOCK::QAR1(A)
        • R(a);::S(C)
      • Refutation
        • R(a);
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • R(a);OGATEB::QAR2(A),XR(a)
      • R(a);SBLOCK::QAR2(A)
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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).