MESON Chess Problem Database

Problem Display
PID: 50987 (R7/6p1/3P2q1/8/3Nk3/1Q2P3/1BK2n1N/8 w - - 0 1)

Barron, Philip

The Spectator, 1955

R7/6p1/3P2q1/8/3Nk3/1Q2P3/1BK2n1N/8

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Qh7
      • 2.Re8#
      • 2.Qe6#
    • 1...Qe8
      • 2.Rxe8#
    • 1...Qg1
      • 2.Re8#
      • 2.Qe6#
    • 1...Qg2
      • 2.Re8#
      • 2.Qe6#
    • 1...Qe6
      • 2.Qxe6#
  • Tries
    • 1.Re8+?
      • 1...Qe6
        • 2.Rxe6#
        • 2.Qxe6#
      • 1...Qxe8!
  • Keys
    • 1.Sf5!
      • 1...Kxf5
        • 2.Qd5#
      • 1...Qxf5
        • 2.Ra4#
      • 1...Qxd6
        • 2.Sxd6#
      • 1...Qh5
        • 2.Sg3#
        • 2.Qe6#
      • 1...Qf7
        • 2.Sg3#
      • 1...Qh7
        • 2.Sg3#
        • 2.Qe6#
      • 1...Qe8
        • 2.Sg3#
      • 1...Qg1
        • 2.Qe6#
      • 1...Qg2
        • 2.Qe6#
      • 1...Qg3
        • 2.Sxg3#
      • 1...Qg4
        • 2.Qe6#
      • 1...Qg5
        • 2.Qe6#
      • 1...Qe6
        • 2.Sg3#
        • 2.Qxe6#
      • 1...Qf6
        • 2.Sg3#
      • 1...Qh6
        • 2.Sg3#
      • 1...Sd1
        • 2.Qd3#
      • 1...Sh1
        • 2.Qd3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sh3
        • 2.Qd3#
      • 1...Sg4
        • 2.Sg3#
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 15
    • REMOVED MATES = 1
  • Sets
    • Q(c);N_GUARD::R(H),XQ(c)
    • Q(c);N_GUARD::QAR2(D),XQ(c)
  • Tries
    • Try
      • R(H);CHECK
      • Refutation
        • Q(c);XR(H)
  • Actual
    • S(F);
    • Vars
      • K(b);S_FLIGHT,XS(F)::QAR2(D)
      • Q(c);SBLOCK,XS(F)::R(H)
      • Q(c);XP(G)::S(F),XQ(c)
      • Q(c);N_GUARD::S(F)
      • Q(c);N_GUARD::QAR2(D)
      • Q(c);N_GUARD::S(F),XQ(c)
      • S(a);N_GUARD::QAB1(D)
      • S(a);N_GUARD::QAB1(D),XS(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).