MESON Chess Problem Database

Problem Display
PID: 247630 (1q1n4/8/2p2pr1/1pPk1P1N/4b3/1P1N1R2/3K1BB1/8 w - - 0 1)

Dolan, JJP

British Chess Magazine, 1932

1q1n4/8/2p2pr1/1pPk1P1N/4b3/1P1N1R2/3K1BB1/8

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qf4+
      • 2.Shxf4#
    • 1...Qe5
      • 2.Sb4#
    • 1...Qa7
      • 2.Shf4#
    • 1...Qb6
      • 2.Shf4#
    • 1...Qb7
      • 2.Shf4#
    • 1...Qa8
      • 2.Shf4#
    • 1...Qc8
      • 2.Shf4#
    • 1...Rxg2
      • 2.Sxf6#
    • 1...Rg3
      • 2.Sxf6#
    • 1...Rg4
      • 2.Sxf6#
    • 1...Rg5
      • 2.Sxf6#
    • 1...Rg7
      • 2.Sxf6#
    • 1...Rg8
      • 2.Sxf6#
    • 1...Bxf3
      • 2.Bxf3#
  • Keys
    • 1.Rf4!
      • threat
        • 2.Bxe4#
      • 1...Qxf4+
        • 2.Shxf4#
      • 1...Rxg2
        • 2.Sxf6#
      • 1...Bxg2
        • 2.Rd4#
      • 1...Qe5
        • 2.Sb4#
      • 1...Bf3
        • 2.Bxf3#
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 11
  • Sets
    • Q(g);CHECK,N_GUARD::S(I),XQ(g)
    • Q(g);SBLOCK::S(E)
    • Q(g);N_GUARD::S(I)
    • R(f);N_GUARD,P_PINB(B),XB(C)::S(I),XP(e)
    • R(f);N_GUARD::S(I),XP(e)
    • B(a);OGATE,P_SPINB(a),XR(F)::B(C),XB(a)
  • Actual
    • R(F);P_PINB(a)
    • Threat
      • B(C),XB(a)
    • Vars
      • Q(g);CHECK,XR(F)::S(I),XQ(g)
      • R(f);N_GUARD,N_SPINB(a),P_PINB(B),XB(C)::S(I),XP(e)
      • B(a);N_SPINB(a),OGATE,XB(C)::R1(F)
      • Q(g);SBLOCK::S(E)
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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).