MESON Chess Problem Database

Problem Display
PID: 9521 (3B3K/2pn4/2p1NR1p/4k3/8/7p/5Nbq/b2Q4 w - - 0 1)

Blake, Percy Francis

Bolton Football and Field, 1905

3B3K/2pn4/2p1NR1p/4k3/8/7p/5Nbq/b2Q4

#2

6 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.Qxd4#
    • 1...Be4
      • 2.Sg4#
  • Tries
    • 1.Sxc7?
      • threat
        • 2.Qxa1#
        • 2.Qd6#
      • 1...Qg1
        • 2.Qd6#
      • 1...Qg3
        • 2.Qd6#
      • 1...Qf4
        • 2.Qd6#
      • 1...Qh1
        • 2.Qd6#
      • 1...Bb2
        • 2.Qd6#
      • 1...Bc3
        • 2.Qd6#
      • 1...Bd4
        • 2.Qh5#
      • 1...Bd5
        • 2.Qxa1#
      • 1...Sxf6!
    • 1.Qxa1+?
      • 1...Kd5
        • 2.Qd4#
      • 1...Kd6!
  • Keys
    • 1.Sg7!
      • threat
        • 2.Rf5#
      • 1...Sxf6
        • 2.Bxc7#
      • 1...Bd4
        • 2.Qh5#
      • 1...Qf4
        • 2.Re6#
      • 1...Be4
        • 2.Sg4#
      • 1...Bd5
        • 2.Qxa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAB1(A),XB(a)
    • B(b);SBLOCK::S(B)
  • Tries
    • Try
      • S(C);XP(h)
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);::QAB1(A)
        • B(a);::QAB1(A)
        • B(a);SBLOCK::QAR(A)
        • B(b);::QAB(A),XB(a)
      • Refutation
        • S(i);XR(D)
    • Try
      • Q(A);CHECK,XB(a)
      • Vars
        • K(e);P-FLIGHT::QAR1(A)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • S(C);
    • Threat
      • R1(D)
    • Vars
      • S(i);SBLOCK,XR(D)::B(E),XP(h)
      • B(a);SBLOCK::QAR(A)
      • Q(c);SBLOCK::R1(D)
      • B(b);SBLOCK::S(B)
      • B(b);SBLOCK::QAB(A),XB(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).