MESON Chess Problem Database

Problem Display
PID: 265552 (7Q/8/8/7p/6k1/3P1Rp1/8/6K1 w - - 0 1)

Bazhan, Anastasia

Kudesnik, 2022

7Q/8/8/7p/6k1/3P1Rp1/8/6K1

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kh3
      • 2.Qxh5#
  • Tries
    • 1.Rf4+?
      • 1...Kh3
        • 2.Qxh5#
        • 2.Qc8#
      • 1...Kg5
        • 2.Qf6#
      • 1...Kxf4!
    • 1.Qf6?
      • 1...h4
        • 2.Qf5#
      • 1...g2
        • 2.Qf4#
      • 1...Kh3!
    • 1.Qg7+?
      • 1...Kh3
        • 2.Qxg3#
      • 1...Kh4
        • 2.Qxg3#
      • 1...Kxf3!
    • 1.Qg8+?
      • 1...Kh3
        • 2.Qxg3#
      • 1...Kh4
        • 2.Qxg3#
      • 1...Kxf3!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Qxg3#
      • 1...Kxf3
        • 2.Qe4#
      • 1...Kh3
        • 2.Qxg3#
        • 2.Qxh5#
      • 1...Kh4
        • 2.Qxg3#
      • 1...g2
        • 2.Qg3#
        • 2.Qf4#
      • 1...h4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(b);N_GUARD,P_SPINP(a),S_FLIGHT::QAR2(D),XP(c)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAB1(D)
      • Refutation
        • K(b);P-FLIGHT,XR(C)
    • Try
      • Q(D);
      • Vars
        • P(c);SBLOCK::QAB1(D)
        • P(a);::QAR1(D)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);OGATE,P_SPINP(a),S_FLIGHT::QAR1(D),XP(a)
        • K(b);OGATE,P-FLIGHT::QAB1(D),XP(a)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);OGATE,P_SPINP(a),S_FLIGHT::QAR1(D),XP(a)
        • K(b);OGATE,P-FLIGHT::QAB1(D),XP(a)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
  • Actual
    • Q(D);
    • Threat
      • QAR1(D),XP(a)
    • Vars
      • K(b);N_GUARD,S_FLIGHT,XR(C)::QAB1(D)
      • K(b);P-FLIGHT::QAB1(D),XP(a)
      • P(c);SBLOCK::QAB1(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).