MESON Chess Problem Database

Problem Display
PID: 58865 (1r1n4/3N4/3R1Bpp/2p2k2/5r1p/b4p2/1P3N2/n1Q4K w - - 0 1)

Beach, Lennox F

4th Comm., Brisbane Courier, 1921

1r1n4/3N4/3R1Bpp/2p2k2/5r1p/b4p2/1P3N2/n1Q4K

#2

7 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Qxc5#
    • 1...Se6
      • 2.Rd5#
  • Tries
    • 1.Qb1+?
      • 1...Re4
        • 2.Qxe4#
      • 1...Sc2!
    • 1.Qc2+?
      • 1...Re4
        • 2.Qxe4#
      • 1...Sxc2!
  • Keys
    • 1.Bg5!
      • threat
        • 2.Qxf4#
      • 1...Kxg5
        • 2.Rd5#
      • 1...hxg5
        • 2.Rf6#
      • 1...Ra4
        • 2.Rf6#
      • 1...Rfb4
        • 2.Rf6#
        • 2.Qxc5#
      • 1...Rc4
        • 2.Rf6#
      • 1...Rd4
        • 2.Rf6#
      • 1...Re4
        • 2.Rf6#
      • 1...Rg4
        • 2.Rf6#
      • 1...Rbb4
        • 2.Qxc5#
      • 1...Se6
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • R(j);S_CUTB(b)::QAR(A),XP(f)
    • S(k);SBLOCK::R(E)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • R(d);N_GUARD,P_SPINR(d)::QAB1(A),XR(d)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(A);CHECK
      • Vars
        • R(d);N_GUARD,P_SPINR(d)::QAB1(A),XR(d)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • B(F);
    • Threat
      • QAR1(A),XR(d)
    • Vars
      • K(g);P-FLIGHT,P_SPINR(d),XB(F)::R(E)
      • P(i);SBLOCK,XB(F)::R1(E)
      • R(d);::R1(E)
      • R(j);S_CUTB(b)::QAR(A),XP(f)
      • S(k);SBLOCK::R(E)
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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).