MESON Chess Problem Database

Problem Display
PID: 43568 (1n3K2/8/5kpp/3bN1b1/4R3/3r2pB/n4N2/4QR2 w - - 0 1)

Strerath, Otto

Schach-Express, 1948

1n3K2/8/5kpp/3bN1b1/4R3/3r2pB/n4N2/4QR2

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Be6
      • 2.Sfg4#
    • 1...Sa6
      • 2.Sd7#
    • 1...Sc6
      • 2.Sd7#
    • 1...Sd7+
      • 2.Sxd7#
  • Tries
    • 1.Qb4?
      • threat
        • 2.Qe7#
      • 1...Sd7+
        • 2.Sxd7#
      • 1...Sc6
        • 2.Sd7#
      • 1...Sxb4!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qd8#
      • 1...Sd7+
        • 2.Sxd7#
      • 1...Bxe4
        • 2.Sxe4#
      • 1...Bb3
        • 2.Seg4#
      • 1...Bc4
        • 2.Seg4#
      • 1...Bc6
        • 2.Seg4#
      • 1...Be6
        • 2.Sfg4#
      • 1...Bb7
        • 2.Seg4#
      • 1...Bf7
        • 2.Seg4#
      • 1...Ba8
        • 2.Seg4#
      • 1...Bg8
        • 2.Seg4#
      • 1...Sc6
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • B(d);SBLOCK::R(B)+S(C),DCHECK
    • S(i);N_GUARD::S(F)
    • S(i);CHECK,N_GUARD::S(F),XS(i)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(i);CHECK,N_GUARD::S(F),XS(i)
        • S(i);N_GUARD::S(F)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • S(i);CHECK,N_GUARD::S(F),XS(i)
      • B(d);XR(E)::R(B)+S(C),DCHECK,XB(d)
      • B(d);::S(F)
      • B(d);SBLOCK::R(B)+S(C),DCHECK
      • S(i);N_GUARD::S(F)
HTML5 logo

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).