MESON Chess Problem Database

Problem Display
PID: 283877 (1N3KB1/5p1R/8/3k2P1/3p4/3N4/P7/3Q4 w - - 0 1)

Koshel, Mikhail Igorevich

Shakhmatnaya kompozitsiya, 2025

1N3KB1/5p1R/8/3k2P1/3p4/3N4/P7/3Q4

#2

8 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qb3#
  • Tries
    • 1.Ke7?
      • 1...Kc4
        • 2.Qb3#
      • 1...Ke4!
    • 1.Rh6?
      • 1...Kc4
        • 2.Qb3#
      • 1...Ke4!
    • 1.Qe2?
      • 1...Kd6
        • 2.Qe5#
      • 1...Kc4!
    • 1.Qf3+?
      • 1...Kd6
        • 2.Qc6#
      • 1...Ke6
        • 2.Rh6#
      • 1...Kc4!
    • 1.Qa4?
      • threat
        • 2.Qc6#
      • 1...Kd6
        • 2.Qc6#
        • 2.Qd7#
      • 1...Ke6
        • 2.Qd7#
      • 1...Ke4!
    • 1.Qg4?
      • 1...Kd6
        • 2.Qd7#
      • 1...Kc4!
    • 1.Qe1?
      • 1...Kd6
        • 2.Qe5#
      • 1...Kc4!
  • Keys
    • 1.Rxf7!
      • 1...Kc4
        • 2.Qb3#
      • 1...Ke4
        • 2.Qf3#
      • 1...Kd6
        • 2.Rd7#
      • 1...Ke6
        • 2.Rf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);N_GUARD,S_FLIGHT::QAB1(A)
  • Tries
    • Try
      • K(G);S_FLIGHT
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);N_SPINP(c),S_FLIGHT
    • Try
      • R(E);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);N_SPINP(c),S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);N_GUARD,N_SPINP(c),P-FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);N_SPINP(c),OGATE,P-FLIGHT::QAR1(A)
        • K(b);N_GUARD,S_FLIGHT::R(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);N_SPINP(c),P_SPINP(a),S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);N_GUARD,N_SPINP(c),P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);N_SPINP(c),P_SPINP(a),S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);N_GUARD,N_SPINP(c),P-FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(E);XP(c)
    • Vars
      • K(b);N_GUARD,S_FLIGHT::QAB1(A)
      • K(b);N_GUARD,P-FLIGHT::R1(E)
      • K(b);N_GUARD,S_FLIGHT::B(H)+R(E),DCHECK
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).