MESON Chess Problem Database

Problem Display
PID: 242993 (8/8/4K3/8/1k6/np3Q2/8/R4B2 w - - 0 1)

Pikhurov, Dimitry Egorovich

Zadachi i Etyudi, 2002

8/8/4K3/8/1k6/np3Q2/8/R4B2

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...b2
      • 2.Qxa3#
  • Tries
    • 1.Qc6?
      • 1...Ka5
        • 2.Qb5#
      • 1...Sb1
        • 2.Ra4#
        • 2.Qc4#
      • 1...Sc2
        • 2.Ra4#
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sb5
        • 2.Qc4#
      • 1...b2!
  • Keys
    • 1.Qd3!
      • 1...Ka4
        • 2.Qb5#
      • 1...Ka5
        • 2.Qb5#
      • 1...Kc5
        • 2.Qd6#
      • 1...Sb1
        • 2.Qc4#
        • 2.Qd4#
      • 1...Sc2
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sb5
        • 2.Qc4#
      • 1...b2
        • 2.Qxa3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATE::QAB1(C),XS(a)
  • Tries
    • Try
      • Q(C);
      • Vars
        • K(c);P_SPINS(a),S_FLIGHT::QAR1(C)
        • S(a);N_GUARD::QAR1(C),XS(a)
        • S(a);N_GUARD::QAR1(C)
      • Refutation
        • P(b);
  • Actual
    • Q(C);
    • Vars
      • K(c);P-FLIGHT,P_SPINS(a)::QAB1(C)
      • K(c);P_SPINS(a),S_FLIGHT::QAR1(C)
      • K(c);S_FLIGHT::QAB1(C)
      • S(a);N_GUARD::QAR1(C)
      • S(a);N_GUARD::QAR1(C),XS(a)
      • P(b);OGATE::QAB1(C),XS(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).