MESON Chess Problem Database

Problem Display
PID: 272996 (1Q6/1B3K2/3B4/2P1P2R/2nk1P2/1P2p3/N3P3/8 w - - 0 1)

Lider, Valentin Viktorovich

Schakend Nederland, 1977

1Q6/1B3K2/3B4/2P1P2R/2nk1P2/1P2p3/N3P3/8

#2

11 + 3

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd6+
      • 2.Qxd6#
  • Tries
    • 1.Be7?
      • 1...Sxe5+
        • 2.Qxe5#
      • 1...Sd6+
        • 2.Qxd6#
      • 1...Sb2
        • 2.Qd6#
        • 2.Qd8#
      • 1...Sd2
        • 2.Qd6#
        • 2.Qd8#
      • 1...Sa3
        • 2.Qd6#
        • 2.Qd8#
      • 1...Sa5
        • 2.Qd6#
        • 2.Qd8#
      • 1...Sb6!
    • 1.Bf8?
      • 1...Sxe5+
        • 2.Qxe5#
      • 1...Sd6+
        • 2.Qxd6#
      • 1...Sb2
        • 2.Qd6#
        • 2.Qd8#
      • 1...Sd2
        • 2.Qd6#
        • 2.Qd8#
      • 1...Sa3
        • 2.Qd6#
        • 2.Qd8#
      • 1...Sa5
        • 2.Qd6#
        • 2.Qd8#
      • 1...Sb6!
    • 1.Rh4?
      • threat
        • 2.f5#
      • 1...Sxe5+
        • 2.fxe5#
      • 1...Sxd6+
        • 2.Qxd6#
      • 1...Sd2!
    • 1.e6?
      • 1...Sxd6+
        • 2.Qxd6#
      • 1...Sb2
        • 2.Qh8#
      • 1...Sd2
        • 2.Qh8#
      • 1...Sa3
        • 2.Qh8#
      • 1...Sa5
        • 2.Qh8#
      • 1...Sb6
        • 2.Qh8#
      • 1...Se5+!
  • Keys
    • 1.Qh8!
      • 1...Sxe5+
        • 2.Qxe5#
      • 1...Sxd6+
        • 2.exd6#
      • 1...Sb2
        • 2.e6#
      • 1...Sd2
        • 2.e6#
      • 1...Sa3
        • 2.e6#
      • 1...Sa5
        • 2.e6#
      • 1...Sb6
        • 2.e6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(b);CHECK,OGATE,XB(H)::QAR2(K),XS(b)
  • Tries
    • Try
      • B(H);
      • Vars
        • S(b);CHECK,OGATE,XP(F)::QAB1(K),XS(b)
        • S(b);CHECK,N_GUARD::QAR2(K),XS(b)
      • Refutation
        • S(b);
    • Try
      • B(H);
      • Vars
        • S(b);CHECK,OGATE,XP(F)::QAB1(K),XS(b)
        • S(b);CHECK,N_GUARD::QAR2(K),XS(b)
      • Refutation
        • S(b);
    • Try
      • R(G);
      • Threat
        • R(G)+P(D)
      • Vars
        • S(b);CHECK,OGATE,XP(F)::R(G)+P(D),XS(b)
        • S(b);CHECK,OGATE,XB(H)::QAR2(K),XS(b)
      • Refutation
        • S(b);
    • Try
      • P(F);
      • Vars
        • S(b);CHECK,OGATE,XB(H)::QAR2(K),XS(b)
        • S(b);N_GUARD::QAB(K)
      • Refutation
        • S(b);CHECK
  • Actual
    • Q(K);
    • Vars
      • S(b);CHECK,OGATE,P_SPINS(b),XP(F)::QAB1(K),XS(b)
      • S(b);CHECK,OGATE,XB(H)::QAB(K)+P(F),XS(b)
      • S(b);N_GUARD::QAB(K)+P(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).