MESON Chess Problem Database

Problem Display
PID: 149421 (5Nk1/3N1p2/7K/7n/5Q2/8/8/8 w - - 0 1)

Aliev, Ilham

Kozhakin-50 JT, 2011

5Nk1/3N1p2/7K/7n/5Q2/8/8/8

#2

4 + 3

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Tries
    • 1.Qg5+?
      • 1...Sg7
        • 2.Qxg7#
      • 1...Kh8!
    • 1.Qg4+?
      • 1...Sg7
        • 2.Qxg7#
      • 1...Kh8!
    • 1.Qf5?
      • threat
        • 2.Qh7#
      • 1...Kh8
        • 2.Qh7#
      • 1...Sf6!
    • 1.Qf6?
      • 1...Sg7
        • 2.Qxg7#
      • 1...Sg3
        • 2.Qg7#
      • 1...Sf4
        • 2.Qg7#
      • 1...Sxf6!
    • 1.Qxf7+?
      • 1...Kh8
        • 2.Sg6#
        • 2.Qh7#
      • 1...Kxf7!
  • Keys
    • 1.Sg6!
      • threat
        • 2.Qb8#
      • 1...Sxf4
        • 2.Sf6#
      • 1...fxg6
        • 2.Qf8#
      • 1...f5
        • 2.Qc4#
      • 1...f6
        • 2.Qc4#
      • 1...Sf6
        • 2.Sxf6#
      • 1...Sg7
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR1(A),XS(a)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR1(A),XS(a)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(c);P-FLIGHT::QAR1(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Vars
        • S(a);N_GUARD::QAR1(A),XS(a)
        • S(a);N_GUARD::QAR1(A)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);CHECK,XP(b)
      • Refutation
        • K(c);S_FLIGHT,XQ(A)
  • Actual
    • S(D);
    • Threat
      • QAR(A)
    • Vars
      • S(a);N_GUARD,XQ(A)::S(C)
      • P(b);OGATE,XS(D)::QAR1(A)
      • P(b);OGATEB::QAB(A)
      • S(a);N_GUARD::S(C),XS(a)
      • S(a);N_GUARD::S(C)
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).