MESON Chess Problem Database

Problem Display
PID: 14 (8/4p1n1/3Pq1pb/6r1/R1p1k1r1/4N1B1/KN3Qb1/3R4 w - - 0 1)

Blake, Percy Francis

Recomm., BCF 004. Ty., 1930-1931

8/4p1n1/3Pq1pb/6r1/R1p1k1r1/4N1B1/KN3Qb1/3R4

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Rxc4#
    • 1...Qd7
      • 2.Rxc4#
    • 1...Rf4
      • 2.Qxf4#
  • Keys
    • 1.Sexc4!
      • threat
        • 2.Rd4#
      • 1...Qxc4+
        • 2.Rxc4#
      • 1...Qxd6
        • 2.Sxd6#
      • 1...Rf4
        • 2.Qxf4#
      • 1...Bf3
        • 2.Qc2#
      • 1...Qd5
        • 2.Re1#
      • 1...Qe5
        • 2.Sxe5#
      • 1...Qf6
        • 2.Se5#
      • 1...Rd5
        • 2.Sd2#
      • 1...Sf5
        • 2.Qxg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 2
  • Sets
    • Q(f);N_GUARD::R(G),XP(b)
    • R(d);N_GUARD::QAR1(D),XR(d)
  • Actual
    • S(E);P_SPINS(E),XP(b)
    • Threat
      • R1(A)
    • Vars
      • Q(f);CHECK,OGATE,P_SPINQ(f),XS(E)::R(G),XQ(f)
      • Q(f);N_PINS(E),XP(H)::R(G)+S(E),DCHECK,XQ(f)
      • R(d);N_GUARD::QAR1(D),XR(d)
      • B(a);SBLOCK::QAB(D)
      • Q(f);SBLOCK::R(A)
      • Q(f);N_PINS(E)::R(G)+S(E),XQ(f)
      • Q(f);N_PINS(E)::R(G)+S(E)
      • R(e);N_PINS(E),SBLOCK::R(G)+S(E),DCHECK
      • S(j);SBLOCK::QAB(D),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).