MESON Chess Problem Database

Problem Display
PID: 274449 (8/8/8/8/5Q2/R2B1P1K/5k2/3n4 w - - 0 1)

Bulanov, Vladimir

64 Shakhmatnoe obozrenie, 2024

8/8/8/8/5Q2/R2B1P1K/5k2/3n4

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Kg1
      • 2.Qh2#
    • 1...Se3
      • 2.Qg3#
  • Tries
    • 1.Ra2+?
      • 1...Ke1
        • 2.Qd2#
      • 1...Kg1
        • 2.Qh2#
      • 1...Sb2!
    • 1.Qd2+?
      • 1...Kg1
        • 2.Qe1#
        • 2.Qg2#
        • 2.Qh2#
      • 1...Kxf3!
    • 1.Qh2+?
      • 1...Ke1
        • 2.Qe2#
      • 1...Kxf3
        • 2.Qg3#
      • 1...Ke3!
    • 1.Qh4+?
      • 1...Kg1
        • 2.Qe1#
      • 1...Kxf3
        • 2.Qg3#
      • 1...Ke3!
  • Keys
    • 1.Ra1!
      • 1...Ke1
        • 2.Qe3#
      • 1...Kg1
        • 2.Qh2#
      • 1...Sc3
        • 2.Rf1#
      • 1...Sb2
        • 2.Rf1#
      • 1...Se3
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);N_GUARD,S_FLIGHT::QAB1(E)
    • S(a);SBLOCK::QAB1(E)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB1(E)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(b);P-FLIGHT,XP(C)
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(E)
        • K(b);N_GUARD,P-FLIGHT,XP(C)::QAR1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR2(E)
        • K(b);N_GUARD,P-FLIGHT,XP(C)::QAR1(E)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(A);
    • Vars
      • K(b);N_GUARD,P_SPINS(a),S_FLIGHT::QAR2(E)
      • K(b);N_GUARD,P_SPINS(a),S_FLIGHT::QAB1(E)
      • S(a);OGATE::R1(A)
      • S(a);SBLOCK::QAB1(E)
HTML5 logo

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).