MESON Chess Problem Database

Problem Display
PID: 273009 (b3R3/Q7/2B5/3n2p1/n2pr1N1/R1b2kPP/4p2K/2N1B3 w - - 0 1)

Hochberger, Adolf

Zilahi, Zoltan

Schackvarlden, 1931

b3R3/Q7/2B5/3n2p1/n2pr1N1/R1b2kPP/4p2K/2N1B3

#2

10 + 9

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.Qf7#
    • 1...Se3
      • 2.Se5#
    • 1...Sb4
      • 2.Rf8#
      • 2.Qf7#
    • 1...Sb6
      • 2.Rf8#
      • 2.Qf7#
    • 1...Sc7
      • 2.Rf8#
    • 1...d3
      • 2.Qf2#
  • Tries
    • 1.Bxd5?
      • threat
        • 2.Rf8#
        • 2.Qf7#
      • 1...Bb7
        • 2.Rf8#
      • 1...d3
        • 2.Qf2#
        • 2.Qe3#
      • 1...Bxd5!
    • 1.Rxc3+?
      • 1...Re3
        • 2.Qf7#
      • 1...Sdxc3
        • 2.Rf8#
        • 2.Qf7#
      • 1...Se3
        • 2.Se5#
        • 2.Rf8#
        • 2.Qf7#
      • 1...dxc3
        • 2.Qf2#
      • 1...d3
        • 2.Qf2#
      • 1...Saxc3!
  • Keys
    • 1.Sb3!
      • threat
        • 2.Sd2#
      • 1...Re3
        • 2.Qf7#
      • 1...Bd2
        • 2.Sxd2#
        • 2.Sxd4#
      • 1...Se3
        • 2.Se5#
      • 1...d3
        • 2.Qf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • R(f);N_GUARD,N_SPINB(b),P_SPINS(g)::QAR(I)
    • S(g);N_SPINB(b),P_SPINR(f),SBLOCK::S(G)
    • S(g);N_GUARD,P_SPINR(f)::R(J)
    • P(e);N_SPINB(b),OGATE::QAR1(I)
  • Tries
    • Try
      • B(H);P_PINR(f),XS(g)
      • Threat
        • DUALS(2)
      • Vars
        • B(i);::R(J)
      • Refutation
        • B(i);N_SPINR(f),XB(H)
    • Try
      • R(D);CHECK,XB(b)
      • Vars
        • R(f);P_SPINR(f),P_SPINS(g)::QAR(I)
        • P(e);OGATE,XR(D)::QAR1(I)
        • P(e);OGATE,P_SPINP(e)::QAR1(I)
      • Refutation
        • S(d);XR(D)
  • Actual
    • S(A);N_PINB(b)
    • Threat
      • S(A)
    • Vars
      • R(f);N_GUARD,P_SPINS(g)::QAR(I)
      • S(g);P_SPINR(f),SBLOCK::S(G)
      • P(e);OGATE::QAR1(I)
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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).