MESON Chess Problem Database

Problem Display
PID: 267094 (q7/2p4R/4kpp1/1N1r4/5PPB/1B2pK2/8/2R3b1 w - - 0 1)

Davidson, C

Ling, John Francis

The Problemist, 1955

q7/2p4R/4kpp1/1N1r4/5PPB/1B2pK2/8/2R3b1

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Rxc6#
    • 1...Qa1
      • 2.Rc6#
    • 1...Qa2
      • 2.Rc6#
    • 1...Qa4
      • 2.Rc6#
    • 1...Qa5
      • 2.Rc6#
    • 1...Qa7
      • 2.Rc6#
    • 1...Qb8
      • 2.Rc6#
    • 1...Qc8
      • 2.Rc6#
    • 1...Qg8
      • 2.Rc6#
    • 1...Qh8
      • 2.Rc6#
    • 1...f5
      • 2.Re7#
  • Tries
    • 1.f5+?
      • 1...Ke5
        • 2.Bg3#
        • 2.Re7#
      • 1...gxf5!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Re4#
      • 1...Rd4+
        • 2.Rc6#
      • 1...Rxb5+
        • 2.Rc6#
      • 1...Re5+
        • 2.Rc6#
      • 1...Qa1
        • 2.Rc6#
      • 1...Qa4
        • 2.Rc6#
      • 1...f5
        • 2.Re7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(h);N_GUARD::R(A),XQ(h)
    • Q(h);N_GUARD::R(A)
    • P(e);::R1(H)
  • Tries
    • Try
      • P(D);CHECK
      • Refutation
        • P(f);XP(D)
  • Actual
    • R(A);N_PINR(c)
    • Threat
      • R(A)
    • Vars
      • R(c);CHECK::B(B)+R(A),DCHECK
      • R(c);CHECK,XS(G)::B(B)+R(A),DCHECK
      • Q(h);N_GUARD::R(A)
      • P(e);::R1(H)
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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).