MESON Chess Problem Database

Problem Display
PID: 19070 (b1B2B2/2N5/2k2K2/q2NP3/nP2P3/4Q3/8/8 w - - 0 1)

Booth, David (Jr)

Deaf Times, 1912

b1B2B2/2N5/2k2K2/q2NP3/nP2P3/4Q3/8/8

#2

9 + 4

3360 Simple Two-move Themes 1924

SOLUTION

  • SOUND
  • Sets
    • 1...Qa7
      • 2.b5#
  • Tries
    • 1.bxa5?
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sb2
        • 2.Qc5#
        • 2.Qb6#
      • 1...Sc3
        • 2.Qc5#
        • 2.Qb6#
        • 2.Qxc3#
      • 1...Sb6
        • 2.Qc5#
        • 2.Qxb6#
      • 1...Bb7!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Se7#
      • 1...Qxb4
        • 2.Sxb4#
      • 1...Qxc7
        • 2.Qxa4#
      • 1...Qxd5
        • 2.exd5#
      • 1...Qxa7
        • 2.b5#
      • 1...Qc5
        • 2.Qxa8#
      • 1...Bb7
        • 2.Qxb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(b);N_GUARD::P(B)
  • Tries
    • Try
      • P(B);XQ(b)
      • Vars
        • S(a);N_GUARD::QAR1(A),XS(a)
      • Refutation
        • B(d);
  • Actual
    • Q(A);
    • Threat
      • S(D)
    • Vars
      • Q(b);XP(B)::S(D),XQ(b)
      • Q(b);OGATE,XS(G)::QAB(A),XS(a)
      • Q(b);OGATE,XS(D)::P(C),XQ(b)
      • Q(b);N_GUARD,XQ(A)::P(B)
      • Q(b);N_GUARD::QAB(A),XB(d)
      • B(d);N_GUARD::QAB1(A),XB(d)
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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).