MESON Chess Problem Database

Problem Display
PID: 75071 (8/3N4/8/3p4/K1k5/3r4/3P4/5Q2 w - - 0 1)

Chepizhni, Viktor Ivanovich

4th Prize, Lukyanov MT, 1996

8/3N4/8/3p4/K1k5/3r4/3P4/5Q2

#2

4 + 3

6167 Viktor Chepizhny 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qf4#
    • 1...d4
      • 2.Qf7#
  • Tries
    • 1.Ka5?
      • 1...Kd4
        • 2.Qf4#
      • 1...d4
        • 2.Qf7#
      • 1...Kb3!
    • 1.Qc1+?
      • 1...Rc3
        • 2.Qxc3#
      • 1...Kd4!
    • 1.Qf4+?
      • 1...d4
        • 2.Qf7#
      • 1...Rd4!
  • Keys
    • 1.Qe2!
      • 1...Kd4
        • 2.Qg4#
      • 1...d4
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINR(a),P-FLIGHT::QAR2(A)
    • P(c);OGATEB,SBLOCK::QAB(A)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(b);N_SPINR(a),P-FLIGHT::QAR2(A)
        • P(c);OGATEB,SBLOCK::QAB(A)
      • Refutation
        • K(b);N_SPINR(a),S_FLIGHT
    • Try
      • Q(A);CHECK,N_PINR(a)
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAR1(A),XR(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK,N_PINR(a)
      • Vars
        • P(c);OGATEB,P_SPINP(c),SBLOCK::QAB(A)
      • Refutation
        • R(a);P_SPINR(a)
  • Actual
    • Q(A);
    • Vars
      • K(b);N_SPINR(a),P-FLIGHT::QAR(A)
      • P(c);OGATEB,SBLOCK::QAB(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).