MESON Chess Problem Database

Problem Display
PID: 58078 (4n1N1/p1kP4/r4n1R/2N1q1b1/5B2/Q4B1b/8/1R4K1 w - - 0 1)

Lancia, Ugo

11th HM., Gamage MT (Chess Life), 1957-1958

4n1N1/p1kP4/r4n1R/2N1q1b1/5B2/Q4B1b/8/1R4K1

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.dxe8S#
  • Tries
    • 1.Bxe5+?
      • 1...Kd8
        • 2.Rb8#
      • 1...Rd6
        • 2.Qa5#
      • 1...Sd6!
    • 1.Rb7+?
      • 1...Kd6
        • 2.dxe8S#
      • 1...Kd8!
  • Keys
    • 1.Rb8!
      • threat
        • 2.d8Q#
      • 1...Kd6
        • 2.dxe8S#
      • 1...Kxb8
        • 2.Sxa6#
      • 1...Bxd7
        • 2.Sxa6#
      • 1...Sxd7
        • 2.Sxa6#
      • 1...Sxg8
        • 2.Rc8#
      • 1...Rd6
        • 2.Qxa7#
      • 1...Se4
        • 2.Rc8#
      • 1...Sg4
        • 2.Rc8#
      • 1...Sd5
        • 2.Rc8#
      • 1...Sh5
        • 2.Rc8#
      • 1...Sh7
        • 2.Rc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • K(g);P_SPINS(e),S_FLIGHT::PXS(h)=S
  • Tries
    • Try
      • B(E);CHECK,XQ(b)
      • Vars
        • K(g);S_FLIGHT::R(A)
        • R(d);P_SPINR(d)::QAB(C)
      • Refutation
        • S(h);P_SPINS(h)
    • Try
      • R(A);CHECK
      • Vars
        • K(g);P_SPINS(e),S_FLIGHT::PXS(h)=S
      • Refutation
        • K(g);N_SPINQ(b),S_FLIGHT
  • Actual
    • R(A);
    • Threat
      • P=Q
    • Vars
      • K(g);P_SPINS(e),S_FLIGHT::PXS(h)=S
      • K(g);S_FLIGHT,XR(A)::S(F),XR(d)
      • B(a);SBLOCK,XP(H)::S(F),XR(d)
      • S(e);SBLOCK,XP(H)::S(F),XR(d)
      • S(e);XS(I)::R1(A)
      • R(d);N_SPINQ(b),OGATE,SBLOCK::QAR2(C),XP(f)
      • S(e);::R1(A)
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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).