MESON Chess Problem Database

Problem Display
PID: 9518 (4rn1q/b1pbp2p/2RB4/1p3R1p/nN1k3N/3ppP1K/1P6/6Q1 w - - 0 1)

Blake, Percy Francis

1st Prize, Birmingham Evening Dispatch, 1905

4rn1q/b1pbp2p/2RB4/1p3R1p/nN1k3N/3ppP1K/1P6/6Q1

#2

9 + 14

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Bxe5#
    • 1...Qg8
      • 2.Be5#
    • 1...Bxf5+
      • 2.Sxf5#
    • 1...Sc3
      • 2.bxc3#
    • 1...Se6
      • 2.Rd5#
    • 1...e6
      • 2.Rf4#
  • Tries
    • 1.Qb1?
      • threat
        • 2.Qxd3#
      • 1...Bxf5+
        • 2.Sxf5#
      • 1...Sxb2
        • 2.Qxb2#
      • 1...d2
        • 2.Qd3#
        • 2.Qe4#
      • 1...Sc5!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qd5#
      • 1...Bxf5+
        • 2.Sxf5#
      • 1...Qxg8
        • 2.Be5#
      • 1...Bxc6
        • 2.Sxc6#
      • 1...e2
        • 2.Qg1#
      • 1...Qe5
        • 2.Bxe5#
      • 1...Be6
        • 2.Qxh8#
      • 1...Sc3
        • 2.bxc3#
      • 1...Sb6
        • 2.Bc5#
      • 1...Se6
        • 2.Rd5#
      • 1...e6
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(n);N_GUARD::B(I),XQ(n)
    • Q(n);N_GUARD::B(I)
    • B(i);CHECK,XR(G)::S(F),XB(i)
    • S(c);OGATE::P(B),XS(c)
    • S(m);N_PINR(G)::R1(G)
    • P(j);N_PINR(G)::R(G)
  • Tries
    • Try
      • Q(A);N_PINP(b)
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • B(i);CHECK,XR(G)::S(F),XB(i)
        • S(c);OGATE,XP(B)::QAB(A),XS(c)
      • Refutation
        • S(c);
  • Actual
    • Q(A);N_PINP(b)
    • Threat
      • QAR1(A)
    • Vars
      • B(i);CHECK,XR(G)::S(F),XB(i)
      • Q(n);N_GUARD,XQ(A)::B(I)
      • B(i);N_PINR(G),XR(H)::S(E),XB(i)
      • P(b);OGATEB::QAB(A)
      • Q(n);N_GUARD::B(I),XQ(n)
      • B(i);S_CUTP(j)::QAB(A),XQ(n)
      • S(c);OGATE::P(B),XS(c)
      • S(c);N_GUARD,S_CUTB(g)::B(I)
      • S(m);N_PINR(G)::R1(G)
      • P(j);N_PINR(G)::R(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).