MESON Chess Problem Database

Problem Display
PID: 37157 (8/NB4B1/8/8/p1kP4/Q1n2K2/4P3/8 w - - 0 1)

Feoktistov, Aleksandr Fedorovich

2nd HM., Lenin MT, 1970

8/NB4B1/8/8/p1kP4/Q1n2K2/4P3/8

#2

7 + 3

3751 FIDE Album (1968-1970) 1977

SOLUTION

  • SOUND
  • Sets
    • 1...Sd5
      • 2.Ba6#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Sd6#
      • 1...Kxb5
        • 2.Qc5#
      • 1...Se4
        • 2.Qxa4#
      • 1...Sxb5!
    • 1.Sc8?
      • threat
        • 2.Sd6#
      • 1...Kb5
        • 2.Qc5#
      • 1...Sb5
        • 2.Sb6#
      • 1...Se4!
    • 1.Bf8?
      • threat
        • 2.Qb4#
      • 1...Kxd4
        • 2.Qc5#
      • 1...Sa2
        • 2.Qd3#
      • 1...Sd5
        • 2.Qd3#
      • 1...Sxe2!
  • Keys
    • 1.Bc8!
      • 1...Kd5
        • 2.Qc5#
      • 1...Sxe2
        • 2.Be6#
      • 1...Sb1
        • 2.Be6#
      • 1...Sd1
        • 2.Be6#
      • 1...Sa2
        • 2.Be6#
      • 1...Se4
        • 2.Be6#
      • 1...Sb5
        • 2.Be6#
      • 1...Sd5
        • 2.Ba6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD,SBLOCK::B(F)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • K(c);S_FLIGHT,XS(E)::QAR1(B)
        • S(a);N_GUARD::QAR2(B),XP(b)
      • Refutation
        • S(a);XS(E)
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • K(c);S_FLIGHT::QAR1(B)
        • S(a);SBLOCK::S(E)
      • Refutation
        • S(a);
    • Try
      • B(G);
      • Threat
        • QAR1(B)
      • Vars
        • K(c);P-FLIGHT,XP(D)::QAB1(B)
        • S(a);OGATE::QAB1(B)
      • Refutation
        • S(a);XP(A)
  • Actual
    • B(F);
    • Vars
      • K(c);S_FLIGHT::QAR1(B)
      • S(a);N_GUARD,XP(A)::B(F)
      • S(a);N_GUARD::B(F)
      • S(a);N_GUARD,SBLOCK::B(F)
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).