MESON Chess Problem Database

Problem Display
PID: 254543 (1Q6/2B1N3/r2npp2/2N1n2K/p4k2/3pp2R/8/1B6 w - - 0 1)

Sachsel, Robert

Wiener Schachzeitung, 1937

1Q6/2B1N3/r2npp2/2N1n2K/p4k2/3pp2R/8/1B6

#2

7 + 9

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Se4
      • 2.Sxd3#
    • 1...Sf5
      • 2.Sg6#
    • 1...Sf7
      • 2.Qb4#
    • 1...Sc8
      • 2.Qb4#
    • 1...Se8
      • 2.Qb4#
    • 1...d2
      • 2.Sxe6#
  • Tries
    • 1.Qb4+?
      • 1...Sdc4
        • 2.Qxc4#
      • 1...Se4
        • 2.Sxd3#
        • 2.Qxe4#
      • 1...Sec4!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qh2#
      • 1...Sf3
        • 2.Qxf6#
      • 1...Sg4
        • 2.Qd4#
      • 1...Se4
        • 2.Sxd3#
      • 1...Sf5
        • 2.Sg6#
      • 1...d2
        • 2.Sxe6#
      • 1...e2
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(g);P_SPINS(e),SBLOCK::S(C),XP(a)
    • S(g);P_SPINS(e),SBLOCK::S(F)
    • S(g);N_GUARD,P_SPINS(e)::QAR(G)
    • P(a);::S(C),XP(h)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINS(g),S_CUTS(e)::QAR(G),XS(g)
      • Refutation
        • S(e);P_SPINS(e)
  • Actual
    • Q(G);
    • Threat
      • QAB(G)
    • Vars
      • S(e);OGATE,P_SPINS(g)::QAR2(G),XP(i)
      • S(e);P_SPINS(g)::QAR2(G)
      • S(g);P_SPINS(e),SBLOCK::S(C),XP(a)
      • S(g);P_SPINS(e),SBLOCK::S(F)
      • P(a);::S(C),XP(h)
      • P(b);OGATEB::QAB(G)
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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).