MESON Chess Problem Database

Problem Display
PID: 258919 (2RbK1Q1/3p4/3k4/1pnNp3/1q1p3n/Bp6/8/7B w - - 0 1)

Ahues, Herbert Siegfried Oskar

Deutsche Schachzeitung, 1986

2RbK1Q1/3p4/3k4/1pnNp3/1q1p3n/Bp6/8/7B

#2

6 + 10

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Bxc5#
    • 1...Qd2
      • 2.Bxc5#
    • 1...Qa5
      • 2.Bxc5#
    • 1...Qa4
      • 2.Bxc5#
  • Tries
    • 1.Sf6?
      • threat
        • 2.Qd5#
      • 1...Qc4
        • 2.Se4#
      • 1...Se6!
    • 1.Sc7?
      • threat
        • 2.Qd5#
      • 1...Se6
        • 2.Sxb5#
      • 1...Qc4!
    • 1.Qf8+?
      • 1...Be7
        • 2.Qxe7#
      • 1...Ke6!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Qd5#
      • 1...Qc4
        • 2.Se4#
      • 1...Se6
        • 2.Sxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(b);OGATE,P_SPINS(f)::B(B),XS(f)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(F)
      • Vars
        • Q(b);P_SPINS(f)::S(C)
      • Refutation
        • S(f);P_SPINQ(b)
    • Try
      • S(C);
      • Threat
        • QAR1(F)
      • Vars
        • S(f);P_SPINQ(b)::S(C),XP(e)
      • Refutation
        • Q(b);P_SPINS(f)
    • Try
      • Q(F);CHECK
      • Vars
        • B(j);N_GUARD,P_SPINB(j)::QAB1(F),XB(j)
      • Refutation
        • K(h);P-FLIGHT
  • Actual
    • S(C);
    • Threat
      • QAR1(F)
    • Vars
      • Q(b);P_SPINS(f)::S(C)
      • S(f);P_SPINQ(b)::S(C),XP(e)
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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).