MESON Chess Problem Database

Problem Display
PID: 137314 (7K/p1bQ2pN/1p2B1b1/r3k1B1/p2n3R/r4p2/2q1p2N/8 w - - 0 1)

Wilhelm, Joseph A

Australasian Chess Magazine, 1920

7K/p1bQ2pN/1p2B1b1/r3k1B1/p2n3R/r4p2/2q1p2N/8

#2

7 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Qxd5#
    • 1...Ra6
      • 2.Qd5#
    • 1...Be4
      • 2.Sg4#
      • 2.Bf4#
    • 1...Sb3
      • 2.Sxf3#
    • 1...Sb5
      • 2.Qd5#
    • 1...b5
      • 2.Qd5#
  • Keys
    • 1.Sf8!
      • threat
        • 2.Qxd4#
      • 1...Sxe6
        • 2.Qxe6#
      • 1...Qd1
        • 2.Sxg6#
        • 2.Qxc7#
      • 1...Qd3
        • 2.Qxc7#
      • 1...Qe4
        • 2.Qxc7#
      • 1...Qb2
        • 2.Sxg6#
        • 2.Qxc7#
      • 1...Qd2
        • 2.Sxg6#
        • 2.Qxc7#
      • 1...Qc3
        • 2.Sxg6#
      • 1...Qc4
        • 2.Sxg6#
      • 1...Qc5
        • 2.Sxg6#
      • 1...Rd3
        • 2.Sxg6#
      • 1...Rd5
        • 2.Qxd5#
      • 1...Be4
        • 2.Sg4#
      • 1...Bd6
        • 2.Qxg7#
      • 1...Sb3
        • 2.Sxf3#
      • 1...Sb5
        • 2.Qd5#
      • 1...Sf5
        • 2.Sxg6#
      • 1...Sc6
        • 2.Qxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 2
  • Sets
    • R(g);N_GUARD::QAR1(E),XR(g)
    • R(g);N_GUARD::QAR1(E)
    • S(f);N_GUARD,S_CUTR(c)::S(A),XP(d)
    • S(f);S_CUTR(g)::QAR1(E)
    • P(i);S_CUTR(g)::QAR1(E)
  • Actual
    • S(F);
    • Threat
      • QAB1(E),XS(f)
    • Vars
      • S(f);OGATE,XB(D)::QAR1(E),XS(f)
      • Q(a);N_GUARD::QAB(E),XB(l)
      • Q(a);N_GUARD::S(F),XB(j)
      • R(c);S_CUTQ(a)::S(F),XB(j)
      • R(g);N_GUARD::QAR1(E),XR(g)
      • B(j);SBLOCK::S(A)
      • B(l);SBLOCK::QAB(E),XP(m)
      • S(f);N_GUARD,S_CUTR(c)::S(A),XP(d)
      • S(f);S_CUTR(g)::QAR1(E)
      • S(f);S_CUTQ(a)::S(F),XB(j)
      • S(f);S_CUTQ(a)::QAB(E),XB(l)
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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).