MESON Chess Problem Database

Problem Display
PID: 24900 (n3B2K/p5Bp/r7/1NPk3r/4N1Qp/1n6/2Rp1b2/4qb2 w - - 0 1)

Blake, Percy Francis

1st Prize, SCPF Solving Ty., 1919

n3B2K/p5Bp/r7/1NPk3r/4N1Qp/1n6/2Rp1b2/4qb2

#2

8 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Qxf5#
    • 1...Rhh6
      • 2.Qf5#
    • 1...Bc4
      • 2.Sbc3#
    • 1...Bxc5
      • 2.Sec3#
    • 1...Sxc5
      • 2.Sec3#
    • 1...Sb6
      • 2.Sc7#
    • 1...Sc7
      • 2.Sxc7#
  • Tries
    • 1.Bf7+?
      • 1...Re6
        • 2.Qxe6#
      • 1...Kc6!
    • 1.Qxh5+?
      • 1...Ke6
        • 2.Qf7#
        • 2.Qe5#
      • 1...Kxe4!
  • Keys
    • 1.c6!
      • threat
        • 2.Bf7#
      • 1...Qxe4
        • 2.Qd7#
      • 1...Rxc6
        • 2.Bxc6#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Re5
        • 2.Sf6#
      • 1...Rh6
        • 2.Qf5#
      • 1...Bc4
        • 2.Sbc3#
      • 1...Bc5
        • 2.Sec3#
      • 1...Sd4
        • 2.Rc5#
      • 1...Sc5
        • 2.Sec3#
      • 1...Sc7
        • 2.Sxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(h);N_GUARD::QAR2(C),XR(h)
    • R(h);N_GUARD::QAR2(C)
    • B(b);SBLOCK::S(D)
    • B(d);SBLOCK,XP(E)::S(B)
    • S(e);SBLOCK,XP(E)::S(B)
    • S(l);N_GUARD::S(D)
    • S(l);N_GUARD::S(D),XS(l)
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • R(i);N_GUARD,P_SPINR(i)::QAB1(C),XR(i)
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • Q(C);CHECK,XR(h)
      • Refutation
        • K(g);S_FLIGHT,XS(B)
  • Actual
    • P(E);
    • Threat
      • B(G)
    • Vars
      • Q(a);SBLOCK,XS(B)::QAR2(C)
      • R(i);OGATE,XP(E)::B(G),XR(i)
      • R(h);N_GUARD::QAR2(C),XR(h)
      • R(h);SBLOCK::S(B)
      • R(h);N_GUARD::QAR2(C)
      • B(b);SBLOCK::S(D)
      • B(d);SBLOCK::S(B)
      • S(e);N_GUARD,S_CUTB(d)::R1(A)
      • S(e);SBLOCK::S(B)
      • S(l);N_GUARD::S(D),XS(l)
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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).