MESON Chess Problem Database

Problem Display
PID: 39108 (4Q3/4bb2/3n4/N2p4/3B4/2Pk1P1B/KnR2Prr/2R5 w - - 0 1)

Howard, David M

Problem Observer, 2001

4Q3/4bb2/3n4/N2p4/3B4/2Pk1P1B/KnR2Prr/2R5

#2

10 + 8

136 Problem Observer 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Rg3
      • 2.Bf1#
    • 1...Rg4
      • 2.Bf1#
    • 1...Rg5
      • 2.Bf1#
    • 1...Rg6
      • 2.Bf1#
    • 1...Rg7
      • 2.Bf1#
    • 1...Rg8
      • 2.Bf1#
    • 1...Bh4
      • 2.Qe2#
      • 2.Qe3#
    • 1...Bg5
      • 2.Qe2#
    • 1...Bf6
      • 2.Qe2#
      • 2.Qe3#
    • 1...Bd8
      • 2.Qe2#
      • 2.Qe3#
    • 1...Bf8
      • 2.Qe2#
      • 2.Qe3#
    • 1...Sc4
      • 2.Bf5#
    • 1...Sb5
      • 2.Bf5#
    • 1...Sf5
      • 2.Bxf5#
    • 1...Sb7
      • 2.Bf5#
    • 1...Sc8
      • 2.Bf5#
    • 1...Sxe8
      • 2.Bf5#
  • Tries
    • 1.Qb5+?
      • 1...Sdc4
        • 2.Bf5#
      • 1...Sxb5
        • 2.Bf5#
      • 1...Sbc4!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Se5#
      • 1...Kc4
        • 2.Se5#
      • 1...Rg5
        • 2.Bf1#
      • 1...Bf6
        • 2.Qe2#
      • 1...Sbc4
        • 2.Sb4#
      • 1...Sdc4
        • 2.Bf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 11
  • Sets
    • R(b);OGATE::B(G)
    • B(g);OGATE::QAB1(J)
    • S(f);N_GUARD::B(G)
    • S(f);N_GUARD::B(G),XS(f)
    • S(f);N_GUARD,XQ(J)::B(G)
  • Tries
    • Try
      • Q(J);CHECK
      • Vars
        • S(f);P_SPINS(f)::B(G)
        • S(f);XQ(J)::B(G)
      • Refutation
        • S(a);P_SPINS(a)
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • K(d);S_FLIGHT::S(I)
      • R(b);OGATE::B(G)
      • B(g);OGATE::QAB1(J)
      • S(a);SBLOCK::S(I)
      • S(f);N_GUARD,SBLOCK::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).