MESON Chess Problem Database

Problem Display
PID: 229305 (2KQ4/1B6/1PR5/kr1p4/rN6/p2P4/b1P5/q3B3 w - - 0 1)

Zalkind, Lazar Borissovich

Tidskrift for Schack, 1911

2KQ4/1B6/1PR5/kr1p4/rN6/p2P4/b1P5/q3B3

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb4
      • 2.Rc5#
    • 1...Rc5
      • 2.Rxc5#
    • 1...Rxb6
      • 2.Rc5#
      • 2.Qxb6#
  • Tries
    • 1.Rc4?
      • threat
        • 2.Sc6#
      • 1...Rc5+
        • 2.Rxc5#
      • 1...Rbxb4
        • 2.Rc5#
      • 1...Rxb6
        • 2.Rc5#
      • 1...Raxb4!
  • Keys
    • 1.Rc3!
      • threat
        • 2.Sc6#
      • 1...Rc5+
        • 2.Rxc5#
      • 1...Kxb4
        • 2.Rc4#
      • 1...Raxb4
        • 2.Rxa3#
      • 1...Rbxb4
        • 2.Rc5#
      • 1...Rxb6
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(f);OGATEB,P_SPINR(f),XS(D)::R(F)
    • R(f);OGATEB,P_PINR(F)::R(F),XR(f)
  • Tries
    • Try
      • R(F);
      • Threat
        • B(A)+S(D),DCHECK
      • Vars
        • R(f);CHECK,OGATEB::R(F),XR(f)
        • R(f);OGATEB,P_SPINR(f),XS(D)::R(F)
        • R(f);OGATEB,P_SPINR(f),XP(E)::R(F)
      • Refutation
        • R(d);P_SPINR(d),XS(D)
  • Actual
    • R(F);
    • Threat
      • S(D)
    • Vars
      • R(f);CHECK,OGATEB::R(F),XR(f)
      • K(e);OGATEB,S_FLIGHT,XS(D)::B(A)+R(F),DCHECK
      • R(d);OGATEB,XS(D)::R(F),XP(c)
      • R(f);OGATEB,XS(D)::R(F)
      • R(f);OGATEB,P_SPINR(f),XP(E)::R(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).