MESON Chess Problem Database

Problem Display
PID: 77611 (6Q1/2b3p1/Rq3k1p/4nnrP/3R1P2/5p1B/1B3Np1/6K1 w - - 0 1)

Rupp, Robert

Deutsche Schachzeitung, 1932

6Q1/2b3p1/Rq3k1p/4nnrP/3R1P2/5p1B/1B3Np1/6K1

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.Rxe6#
      • 2.Qxe6#
    • 1...Sd6
      • 2.Qe6#
    • 1...Se7
      • 2.Se4#
  • Tries
    • 1.Qf8+?
      • 1...Sf7
        • 2.Rd6#
      • 1...Ke6!
  • Keys
    • 1.Rd7!
      • threat
        • 2.Qf7#
      • 1...Sd4
        • 2.Se4#
      • 1...Sd6
        • 2.Qe6#
      • 1...Se7
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(d);N_SPINQ(f),S_CUTQ(f)::QAR1(I)
    • S(d);SBLOCK::S(C)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • S(c);P_SPINS(c)::B(B)+R(E),DCHECK
      • Refutation
        • K(g);P-FLIGHT,P_SPINS(d)
  • Actual
    • R(E);P_PINS(c),P_SPINS(C)
    • Threat
      • QAR1(I)
    • Vars
      • S(d);N_PINS(C),N_SPINS(c)::S(C)
      • S(d);N_SPINQ(f),S_CUTQ(f)::QAR1(I)
      • S(d);::QAR2(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).