MESON Chess Problem Database

Problem Display
PID: 275031 (1B4b1/4Q3/BpR1r3/4np2/4kP2/2P5/4K3/8 w - - 0 1)

Stockum, Richard

Die Schwalbe, 1933

1B4b1/4Q3/BpR1r3/4np2/4kP2/2P5/4K3/8

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf4
      • 2.Qh4#
    • 1...Rxc6
      • 2.Qxe5#
    • 1...Rd6
      • 2.Qxe5#
    • 1...Rf6
      • 2.Qxe5#
    • 1...Rg6
      • 2.Qxe5#
    • 1...Rh6
      • 2.Qxe5#
  • Tries
    • 1.Rc4+?
      • 1...Sxc4
        • 2.Bb7#
      • 1...Kd5!
    • 1.Qb4+?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Kd5!
  • Keys
    • 1.Bb7!
      • threat
        • 2.Rc4#
      • 1...Kxf4
        • 2.Qh4#
      • 1...Kd5
        • 2.Rc5#
      • 1...Rxc6
        • 2.Qxe5#
      • 1...Sxc6
        • 2.Bxc6#
      • 1...Sc4
        • 2.Rxc4#
        • 2.Rc5#
        • 2.Rxb6#
        • 2.Rxe6#
        • 2.Rc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • K(a);OGATEB,P-FLIGHT,P_SPINS(b),XP(C)::QAR2(F)
    • R(e);OGATE,P_SPINS(b),XR(E)::QAR1(F),XS(b)
    • R(e);OGATE,P_SPINS(b)::QAR1(F),XS(b)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • S(b);P_SPINR(e),XR(E)::B(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR2(F),XS(b)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(D);
    • Threat
      • B(D)+R(E),DCHECK
    • Vars
      • K(a);OGATEB,P-FLIGHT,P_SPINS(b),XP(C)::QAR2(F)
      • K(a);N_GUARD,S_FLIGHT::B(D)+R(E),DCHECK
      • R(e);OGATE,P_SPINR(e),P_SPINS(b),XR(E)::QAR1(F),XS(b)
      • S(b);OGATE,P_SPINR(e),P_SPINS(b),XR(E)::B(D),XS(b)
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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).