MESON Chess Problem Database

Problem Display
PID: 78906 (1qR5/1nbp4/PNkN2nR/Pp2Q3/8/3rB3/4B2K/3r1b2 w - - 0 1)

Lange, Hans Franz

Die Schwalbe, 1936

1qR5/1nbp4/PNkN2nR/Pp2Q3/8/3rB3/4B2K/3r1b2

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd6
      • 2.Qxb5#
    • 1...Sf4
      • 2.Qxb5#
    • 1...Sh4
      • 2.Qxb5#
    • 1...Se7
      • 2.Qxb5#
    • 1...Sf8
      • 2.Qxb5#
    • 1...Sh8
      • 2.Qxb5#
    • 1...Sxa5
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sxd6
      • 2.Qc5#
    • 1...Sd8
      • 2.Qc5#
  • Tries
    • 1.Qc3+?
      • 1...Kxd6
        • 2.Qf6#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Rxc3!
    • 1.Qe4+?
      • 1...Kxd6
        • 2.Rxg6#
      • 1...Rd5!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Se7#
      • 1...Rd6
        • 2.Qxb5#
      • 1...Sd6
        • 2.Qc5#
      • 1...d6
        • 2.Qe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • R(c);SBLOCK,XS(H)::QAB1(E),XP(d)
    • S(f);::QAB1(E),XP(d)
    • S(g);N_GUARD,XP(D)::QAR1(E)
    • S(g);N_GUARD::QAR1(E),XS(g)
    • S(g);N_GUARD,XS(H)::QAR1(E)
    • S(g);N_GUARD::QAR1(E)
  • Tries
    • Try
      • Q(E);CHECK,P_SPINS(H)
      • Vars
        • K(e);N_SPINB(h),OGATEB,P-FLIGHT,P_SPINS(f),XS(H)::QAR2(E)
        • S(g);N_GUARD,P_SPINS(g)::QAR1(E),XS(g)
      • Refutation
        • R(c);XQ(E)
    • Try
      • Q(E);CHECK,P_SPINS(H)
      • Vars
        • K(e);N_SPINB(h),P-FLIGHT,P_SPINS(f),XS(H)::R(I),XS(f)
      • Refutation
        • R(c);P_SPINR(c)
  • Actual
    • S(H);P_PINS(f),P_SPINQ(E)
    • Threat
      • S(H)
    • Vars
      • R(c);N_PINQ(E),N_SPINS(f)::QAB1(E),XP(d)
      • S(g);N_PINQ(E),N_SPINS(f)::QAR1(E)
      • P(i);N_PINQ(E),N_SPINS(f)::QAB(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).