MESON Chess Problem Database

Problem Display
PID: 51505 (5bB1/3Rp1n1/2p1n1p1/3N1kPp/5P1p/Kp5P/6Q1/2B5 w - - 0 1)

Brotherton, David WA

The Guardian, 1962

5bB1/3Rp1n1/2p1n1p1/3N1kPp/5P1p/Kp5P/6Q1/2B5

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...b2
      • 2.Qc2#
    • 1...cxd5
      • 2.Rxd5#
      • 2.Qxd5#
  • Tries
    • 1.Qf3?
      • threat
        • 2.Se3#
        • 2.Qd3#
      • 1...Sxf4
        • 2.Qxf4#
      • 1...cxd5
        • 2.Rxd5#
        • 2.Qxd5#
        • 2.Qd3#
      • 1...Sc5
        • 2.Se3#
      • 1...Sxg5!
    • 1.Qe2?
      • threat
        • 2.Qd3#
        • 2.Qe5#
      • 1...Sxg5
        • 2.Qe5#
      • 1...Sc5
        • 2.Qe5#
      • 1...Sxf4!
    • 1.Qg4+?
      • 1...Ke4
        • 2.Sc3#
      • 1...hxg4!
  • Keys
    • 1.Rxe7!
      • 1...Bxe7+
        • 2.Sxe7#
      • 1...Sxf4
        • 2.Se3#
      • 1...Sxg5
        • 2.Qxg5#
      • 1...cxd5
        • 2.Qxd5#
      • 1...Sd4
        • 2.Qe4#
      • 1...Sc5
        • 2.Re5#
      • 1...Sc7
        • 2.Qe4#
      • 1...Sd8
        • 2.Qe4#
      • 1...Se8
        • 2.Bxe6#
      • 1...b2
        • 2.Qc2#
      • 1...c5
        • 2.Rf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • P(a);N_GUARD::QAB(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(f);OGATE,P_SPINS(f),XP(E)::QAR1(B),XS(f)
        • S(f);::S(F)
      • Refutation
        • S(f);XP(G)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(f);XP(G)::QAR1(B)
        • S(f);::QAR1(B)
      • Refutation
        • S(f);XP(E)
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);S_FLIGHT::S(F)
      • Refutation
        • P(d);XQ(B)
  • Actual
    • R(H);P_SPINR(H),XP(h)
    • Vars
      • B(j);CHECK,XR(H)::S(F),XB(j)
      • S(f);SBLOCK,XP(E)::S(F)
      • S(f);OGATE,XP(G)::QAR1(B),XS(f)
      • P(e);OGATE,XS(F)::QAR2(B),XP(e)
      • S(f);::QAB1(B)
      • S(f);N_PINR(H)::R1(H)
      • S(i);N_GUARD::B(I),XS(f)
      • P(a);N_GUARD::QAB(B)
      • P(e);N_PINR(H)::R(H)
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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).