MESON Chess Problem Database

Problem Display
PID: 32544 (3B2n1/ppb3qr/1R1n4/2k1N3/KNp5/2P5/8/1Q6 w - - 0 1)

Baxter, CR

The Westminster Papers, 1876

3B2n1/ppb3qr/1R1n4/2k1N3/KNp5/2P5/8/1Q6

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qh8
      • 2.Qg1#
    • 1...Qg1
      • 2.Qxg1#
    • 1...Qe7
      • 2.Qg1#
    • 1...Sf7
      • 2.Sd7#
    • 1...Se7
      • 2.Sd7#
  • Keys
    • 1.Be7!
      • threat
        • 2.Sd7#
        • 2.Rb5#
      • 1...Kxb6
        • 2.Sd7#
      • 1...Qxe5
        • 2.Rb5#
      • 1...Qxe7
        • 2.Qg1#
      • 1...Bxb6
        • 2.Sd7#
      • 1...Sxe7
        • 2.Sd7#
      • 1...axb6
        • 2.Sd7#
      • 1...Qg4
        • 2.Rb5#
      • 1...Sf6
        • 2.Rb5#
      • 1...a6
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • Q(g);N_GUARD::QAB(A)
    • Q(g);N_GUARD::QAB(A),XQ(g)
    • S(c);S_CUTQ(g)::S(E)
    • S(i);S_CUTQ(g)::S(E)
  • Actual
    • B(G);P_PINS(c)
    • Threat
      • DUALS(2)
    • Vars
      • K(b);N_SPINS(c),S_FLIGHT,XR(F)::S(E)
      • Q(g);XS(E)::R1(F)
      • Q(g);N_GUARD,N_SPINS(c),XB(G)::QAB(A)
      • B(f);XR(F)::S(E)
      • S(i);N_SPINS(c),XB(G)::S(E)
      • P(d);XR(F)::S(E)
      • Q(g);::R1(F)
      • S(i);::R1(F)
      • P(d);::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).