MESON Chess Problem Database

Problem Display
PID: 182723 (8/3Q4/3N4/3n4/8/1N1k2K1/1R6/8 w - - 0 1)

Ouellet, Charles

Problem Observer, 2015

8/3Q4/3N4/3n4/8/1N1k2K1/1R6/8

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Rd2+?
      • 1...Ke3
        • 2.Qe6#
      • 1...Kc3!
    • 1.Qa4?
      • threat
        • 2.Qd4#
      • 1...Kc3
        • 2.Qd4#
      • 1...Ke3
        • 2.Qd4#
        • 2.Qe4#
      • 1...Sb4!
    • 1.Qb5+?
      • 1...Ke3
        • 2.Re2#
        • 2.Qe2#
      • 1...Kc3!
    • 1.Qf5+?
      • 1...Ke3
        • 2.Sc4#
        • 2.Qe4#
        • 2.Qf3#
      • 1...Kc3!
    • 1.Qc6?
      • 1...Se3
        • 2.Rd2#
      • 1...Sc3
        • 2.Qf3#
      • 1...Sb4
        • 2.Qf3#
      • 1...Sf4
        • 2.Qf3#
      • 1...Sb6
        • 2.Qf3#
      • 1...Sf6
        • 2.Qf3#
      • 1...Sc7
        • 2.Qf3#
      • 1...Se7
        • 2.Qf3#
      • 1...Ke3!
    • 1.Qa7?
      • threat
        • 2.Qd4#
      • 1...Kc3
        • 2.Qd4#
      • 1...Sb6!
    • 1.Qg7?
      • threat
        • 2.Qd4#
      • 1...Ke3
        • 2.Qd4#
      • 1...Sf6!
    • 1.Qh7+?
      • 1...Ke3
        • 2.Sc4#
        • 2.Qe4#
      • 1...Kc3!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qd4#
      • 1...Kc3
        • 2.Qd4#
      • 1...Ke3
        • 2.Qe2#
        • 2.Qf3#
        • 2.Qd4#
        • 2.Qe4#
      • 1...Sf4
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • K(a);P-FLIGHT::QAB1(E)
      • Refutation
        • S(b);
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • S(b);SBLOCK::R1(A)
        • S(b);OGATE,SBLOCK::QAR2(E)
        • S(b);OGATE::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • K(a);P-FLIGHT::QAB1(E)
      • Refutation
        • S(b);
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • K(a);P-FLIGHT::QAB1(E)
      • Refutation
        • S(b);
    • Try
      • Q(E);CHECK
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(E);
    • Threat
      • QAR1(E)
    • Vars
      • K(a);P-FLIGHT::QAB1(E)
      • S(b);N_GUARD::QAR2(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).