MESON Chess Problem Database

Problem Display
PID: 270921 (8/3K4/8/7p/5Pk1/Q7/4N3/3B4 w - - 0 1)

Koshel, Mikhail Igorevich

Kudesnik, 2023

8/3K4/8/7p/5Pk1/Q7/4N3/3B4

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Kh4
      • 2.Qg3#
  • Tries
    • 1.Ke6?
      • threat
        • 2.Qg3#
      • 1...Kh4
        • 2.Qg3#
      • 1...h4!
    • 1.Sd4+?
      • 1...Kh4
        • 2.Sf5#
      • 1...Kxf4!
    • 1.Bc2?
      • threat
        • 2.Qg3#
      • 1...Kh4
        • 2.Qg3#
      • 1...h4!
    • 1.Qb3?
      • 1...Kh4
        • 2.Qg3#
      • 1...Kf5
        • 2.Qe6#
      • 1...h4!
    • 1.Qd3?
      • 1...Kh4
        • 2.Qg3#
      • 1...h4!
  • Keys
    • 1.Qe3!
      • 1...Kh4
        • 2.Qg3#
      • 1...Kf5
        • 2.Qe6#
      • 1...h4
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);N_GUARD,P-FLIGHT::QAB1(C)
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • P(b);
    • Try
      • S(B);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT::S(B)
      • Refutation
        • K(a);P-FLIGHT,XP(D)
    • Try
      • B(A);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAB1(C)
        • K(a);N_GUARD,S_FLIGHT::QAB1(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAB1(C)
      • Refutation
        • P(b);
  • Actual
    • Q(C);
    • Vars
      • K(a);N_GUARD,P-FLIGHT::QAB1(C)
      • K(a);N_GUARD,S_FLIGHT::QAB1(C)
      • P(b);SBLOCK::B(A)+S(B)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).