MESON Chess Problem Database

Problem Display
PID: 168152 (8/N7/3p3p/p2k3q/4R1p1/rn5N/b6Q/3K3B w - - 0 1)

Gray, Henry

Chess Amateur (The), 1919

8/N7/3p3p/p2k3q/4R1p1/rn5N/b6Q/3K3B

#2

6 + 9

14868 Pirnie Collection 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sc5
      • 2.Sf4#
  • Keys
    • 1.Qe2!
      • threat
        • 2.Rc4#
        • 2.Qc4#
      • 1...Kc5
        • 2.Qb5#
      • 1...Qxh3
        • 2.Qc4#
      • 1...gxh3
        • 2.Qxh5#
      • 1...Qe5
        • 2.Qc4#
      • 1...Qg6
        • 2.Qc4#
      • 1...Qf7
        • 2.Qc4#
      • 1...Qe8
        • 2.Qc4#
      • 1...Qf5
        • 2.Qc4#
      • 1...Ra4
        • 2.Rc4#
      • 1...Bb1
        • 2.Qc4#
      • 1...Sa1
        • 2.Qb5#
      • 1...Sc1
        • 2.Qb5#
      • 1...Sd2
        • 2.Qb5#
      • 1...Sd4
        • 2.Re5#
      • 1...Sc5
        • 2.Sf4#
      • 1...g3
        • 2.Qxh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 15
    • REMOVED MATES = 0
  • Sets
    • S(c);SBLOCK::S(D)
  • Actual
    • Q(C);
    • Threat
      • DUALS(2)
    • Vars
      • K(f);P-FLIGHT::QAR1(C)
      • Q(g);XS(D)::QAB1(C)
      • P(d);OGATE,P_PINQ(C),XS(D)::QAR(C),XQ(g)
      • Q(g);::QAB1(C)
      • R(b);::B(B)+R(E)
      • B(a);::QAB1(C)
      • S(c);N_GUARD::QAR2(C)
      • S(c);SBLOCK::B(B)+R(E),DCHECK
      • S(c);SBLOCK::S(D)
      • P(d);OGATE,P_PINQ(C)::QAR(C),XQ(g)
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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).