MESON Chess Problem Database

Problem Display
PID: 222854 (Q6b/5p1N/1r6/3RnkNB/1p6/8/p6B/Kb6 w - - 0 1)

Allen, Frederick B

British Chess Magazine, 1930

Q6b/5p1N/1r6/3RnkNB/1p6/8/p6B/Kb6

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rb5
      • 2.Qc8#
    • 1...Rf6
      • 2.Rxe5#
  • Keys
    • 1.Rd4!
      • threat
        • 2.Rf4#
      • 1...Be4
        • 2.Qxe4#
      • 1...Sd3
        • 2.Qe4#
      • 1...Sf3
        • 2.Qxf3#
      • 1...Sc4
        • 2.Qf3#
      • 1...Sg4
        • 2.Qf3#
      • 1...Sc6
        • 2.Qc8#
      • 1...Sg6
        • 2.Bg4#
      • 1...Sd7
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 2
  • Sets
    • R(f);N_GUARD::QAB(G)
    • R(f);S_CUTB(h)::R1(C),XS(d)
  • Actual
    • R(C);N_PINS(d)
    • Threat
      • R1(C)
    • Vars
      • B(a);N_GUARD::QAB1(G),XB(a)
      • S(d);P_PINR(C),S_CUTB(a)::QAB1(G)
      • S(d);N_GUARD,P_PINR(C)::QAR2(G),XS(d)
      • S(d);N_GUARD,P_PINR(C)::QAR2(G)
      • S(d);N_GUARD,P_PINR(C),S_CUTR(f)::QAB(G)
      • S(d);N_GUARD,P_PINR(C),SBLOCK::B(E)
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).