MESON Chess Problem Database

Problem Display
PID: 10047 (8/4Q3/8/5k2/8/2K2NpN/6R1/8 w - - 0 1)

Hinkka, Erkki

Suomen Tehtavaniekat TT, 1961

8/4Q3/8/5k2/8/2K2NpN/6R1/8

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Sfg1?
      • 1...Kg4
        • 2.Qg5#
      • 1...Kg6!
    • 1.Sh2?
      • 1...gxh2
        • 2.Rg5#
      • 1...Kg6!
    • 1.Sf2?
      • threat
        • 2.Qf7#
      • 1...Kf4
        • 2.Qe4#
      • 1...gxf2
        • 2.Qe5#
      • 1...Kg6!
    • 1.Qg5+?
      • 1...Ke4
        • 2.Sd2#
      • 1...Ke6!
    • 1.Qd6?
      • 1...Ke4
        • 2.Qd3#
      • 1...Kg4!
    • 1.Qe5+?
      • 1...Kg4
        • 2.Rxg3#
      • 1...Kg6!
  • Keys
    • 1.Qf7+!
      • 1...Ke4
        • 2.Re2#
      • 1...Kg4
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::QAR1(E)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • S(C);
      • Vars
        • P(a);OGATE,XS(C)::R1(A)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • S(D);
      • Threat
        • QAR2(E)
      • Vars
        • K(b);P-FLIGHT::QAR1(E)
        • P(a);XS(D)::QAR1(E)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);S_FLIGHT::S(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(b);S_FLIGHT::QAB1(E)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::R1(A),XP(a)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
  • Actual
    • Q(E);CHECK
    • Vars
      • K(b);S_FLIGHT::R(A)
      • K(b);P_SPINP(a),S_FLIGHT::S(D)
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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).