MESON Chess Problem Database

Problem Display
PID: 249060 (8/5K2/8/2P1k3/4P3/1n3B2/6N1/6Q1 w - - 0 1)

Popov, Georgy Aleksandrov

Usunov, Emil

Jerusalem Post, 1960

8/5K2/8/2P1k3/4P3/1n3B2/6N1/6Q1

#2

6 + 2

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Qxa1#
    • 1...Sd2
      • 2.Qa1#
    • 1...Sd4
      • 2.Qh2#
    • 1...Sa5
      • 2.Qa1#
    • 1...Sxc5
      • 2.Qxc5#
  • Tries
    • 1.Ke7?
      • 1...Sxc5
        • 2.Qxc5#
        • 2.Qa1#
      • 1...Sa1
        • 2.Qxa1#
      • 1...Sd2
        • 2.Qa1#
      • 1...Sd4
        • 2.Qh2#
      • 1...Sa5
        • 2.Qa1#
      • 1...Sc1!
    • 1.Qf2?
      • 1...Sxc5
        • 2.Qxc5#
      • 1...Sa1
        • 2.Qb2#
      • 1...Sc1
        • 2.Qb2#
      • 1...Sd4
        • 2.Qg3#
      • 1...Sa5
        • 2.Qb2#
      • 1...Sd2!
    • 1.Qd1?
      • threat
        • 2.Qd5#
        • 2.Qd6#
      • 1...Sxc5
        • 2.Qd5#
      • 1...Sd2
        • 2.Qa1#
      • 1...Sd4!
    • 1.c6?
      • 1...Sd4
        • 2.Qh2#
      • 1...Sa1
        • 2.Qc5#
      • 1...Sc1
        • 2.Qc5#
      • 1...Sd2
        • 2.Qc5#
      • 1...Sa5
        • 2.Qc5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Kd6!
  • Keys
    • 1.Qe3!
      • 1...Sxc5
        • 2.Qxc5#
      • 1...Sa1
        • 2.Qc3#
      • 1...Sc1
        • 2.Qc3#
      • 1...Sd2
        • 2.Qc3#
      • 1...Sd4
        • 2.Qf4#
      • 1...Sa5
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB(A),XS(a)
    • S(a);N_GUARD::QAB(A)
    • S(a);SBLOCK::QAB(A)
    • S(a);OGATE,XP(E)::QAR2(A),XS(a)
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Vars
        • S(a);N_GUARD::QAB(A),XS(a)
        • S(a);N_GUARD::QAB(A)
        • S(a);SBLOCK::QAB(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Vars
        • S(a);OGATE,XP(E)::QAR2(A),XS(a)
        • S(a);N_GUARD::QAB(A)
        • S(a);SBLOCK::QAB(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);XP(E)::QAR1(A)
        • S(a);N_GUARD::QAB(A)
      • Refutation
        • S(a);
    • Try
      • P(E);
      • Vars
        • S(a);SBLOCK::QAB(A)
        • S(a);N_GUARD::QAR2(A)
        • S(a);N_GUARD::QAR2(A),XS(a)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • S(a);OGATE,XP(E)::QAR2(A),XS(a)
      • S(a);N_GUARD::QAB(A)
      • S(a);SBLOCK::QAB1(A)
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).