MESON Chess Problem Database

Problem Display
PID: 51072 (8/qp6/4BB2/1b1P1K2/1N2p2p/3P4/4pk1r/2Q3R1 w - - 0 1)

Spencer, George Burt

Burnley Express, 1880

8/qp6/4BB2/1b1P1K2/1N2p2p/3P4/4pk1r/2Q3R1

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Qf4#
  • Tries
    • 1.Kf4?
      • threat
        • 2.Qe1#
      • 1...Qe3+
        • 2.Qxe3#
      • 1...e1Q
        • 2.Qxe1#
      • 1...e1S
        • 2.Qxe1#
      • 1...e1B
        • 2.Qxe1#
      • 1...e1R
        • 2.Qxe1#
      • 1...Qa1
        • 2.Qe3#
      • 1...Qb8+!
    • 1.Bd4+?
      • 1...Kf3
        • 2.Qe3#
        • 2.Qf4#
      • 1...e3
        • 2.Qxe3#
      • 1...Qxd4!
    • 1.Bxh4+?
      • 1...Kf3
        • 2.Qf4#
      • 1...Rxh4!
  • Keys
    • 1.Kxe4!
      • threat
        • 2.Qe1#
      • 1...Qe3+
        • 2.Qxe3#
      • 1...Qd4+
        • 2.Bxd4#
      • 1...Bxd3+
        • 2.Sxd3#
      • 1...e1Q+
        • 2.Qxe1#
      • 1...e1R+
        • 2.Qxe1#
      • 1...e1S
        • 2.Qxe1#
      • 1...e1B
        • 2.Qxe1#
      • 1...Qa1
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • K(b);P-FLIGHT::QAR1(A)
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Threat
        • QAB1(A)
      • Vars
        • Q(g);CHECK,N_GUARD::QAB1(A),XQ(g)
        • P(a);::QAB1(A),XQ(a)
        • P(a);::QAB1(A),XS(a)
        • P(a);::QAB1(A),XB(a)
        • P(a);::QAB1(A),XR(a)
        • Q(g);N_GUARD::QAB1(A)
      • Refutation
        • Q(g);CHECK
    • Try
      • B(H);CHECK
      • Vars
        • P(d);P_SPINP(d)::QAB1(A),XP(d)
      • Refutation
        • Q(g);XB(H)
    • Try
      • B(H);CHECK,XP(e)
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • R(c);XB(H)
  • Actual
    • K(F);S_FLIGHT,XP(d)
    • Threat
      • QAB1(A)
    • Vars
      • Q(g);CHECK,N_GUARD::QAB1(A),XQ(g)
      • Q(g);CHECK,N_GUARD::B(H),XQ(g)
      • B(f);CHECK,XP(C)::S(D),XB(f)
      • P(a);CHECK::QAB1(A),XQ(a)
      • P(a);CHECK::QAB1(A),XR(a)
      • P(a);::QAB1(A),XS(a)
      • P(a);::QAB1(A),XB(a)
      • Q(g);N_GUARD::QAB1(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).