MESON Chess Problem Database

Problem Display
PID: 11961 (2bB2K1/b1Q2B2/7p/1Rn5/rRq3kN/3P2p1/8/6N1 w - - 0 1)

Barnes, Barry Peter

The Problemist, 1973

2bB2K1/b1Q2B2/7p/1Rn5/rRq3kN/3P2p1/8/6N1

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qf4
      • 2.Qxf4#
    • 1...Se6
      • 2.Bh5#
    • 1...Sd7
      • 2.Be6#
  • Tries
    • 1.Rxc4+?
      • 1...Se4
        • 2.Bh5#
      • 1...Rxc4!
  • Keys
    • 1.Sg2!
      • threat
        • 2.Se3#
      • 1...Kf5
        • 2.Se3#
      • 1...Sxd3
        • 2.Qxc8#
      • 1...Sb3
        • 2.Qxc8#
      • 1...Se4
        • 2.Qf4#
      • 1...Sa6
        • 2.Qxc8#
      • 1...Se6
        • 2.Bh5#
      • 1...Sb7
        • 2.Qxc8#
      • 1...Sd7
        • 2.Be6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • Q(c);N_GUARD,N_PINB(G)::QAR1(F),XQ(c)
    • S(e);N_PINB(G)::B(G)
    • S(e);N_GUARD,S_CUTB(h)::B(G)
  • Tries
    • Try
      • R(C);CHECK,N_SPINB(G),XQ(c)
      • Vars
        • S(e);P_SPINS(e)::B(G)
      • Refutation
        • R(b);XR(C)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • K(d);N_SPINQ(c),P_SPINS(e),S_FLIGHT::S(D)
      • S(e);N_GUARD,XP(B)::QAB(F),XB(h)
      • S(e);N_GUARD::QAB(F),XB(h)
      • S(e);N_SPINQ(c),S_CUTQ(c)::QAR1(F)
      • S(e);N_PINB(G)::B(G)
      • S(e);N_GUARD,S_CUTB(h)::B(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).