MESON Chess Problem Database

Problem Display
PID: 272394 (q3N3/b2B2P1/1r3p1K/5N2/6k1/rb2Q2p/4n3/8 w - - 0 1)

Werle, Allan Theodor

Schackvarlden, 1940

q3N3/b2B2P1/1r3p1K/5N2/6k1/rb2Q2p/4n3/8

#2

6 + 9

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Sxf6#
    • 1...Rb5
      • 2.Sxf6#
    • 1...Rb7
      • 2.Sxf6#
    • 1...Rb8
      • 2.Sxf6#
    • 1...Bd1
      • 2.g8Q#
      • 2.g8R#
    • 1...Bc2
      • 2.g8Q#
      • 2.g8R#
    • 1...Ba4
      • 2.g8Q#
      • 2.g8R#
    • 1...Sc1
      • 2.Qg3#
    • 1...Sg1
      • 2.Qg3#
    • 1...Sc3
      • 2.Qg3#
    • 1...Sg3
      • 2.Qxg3#
    • 1...Sd4
      • 2.Qg3#
    • 1...Sf4
      • 2.Qg3#
  • Keys
    • 1.Qf2!
      • threat
        • 2.Se3#
      • 1...Qf3
        • 2.Qh4#
      • 1...Re6
        • 2.g8Q#
        • 2.g8R#
      • 1...Be6
        • 2.Sxf6#
      • 1...Sg3
        • 2.Qxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • R(f);N_GUARD::S(F),XP(g)
    • B(c);N_GUARD::P=Q
    • S(a);N_GUARD::QAR1(A)
    • S(a);N_GUARD::QAR1(A),XS(a)
  • Actual
    • Q(A);
    • Threat
      • B(D)+S(B),DCHECK
    • Vars
      • Q(i);SBLOCK::QAR1(A)
      • R(f);S_CUTB(c)::P=Q
      • B(c);S_CUTR(f)::S(F),XP(g)
      • S(a);N_GUARD::QAR1(A),XS(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).