MESON Chess Problem Database

Problem Display
PID: 43478 (4B2K/7p/3R1p2/nPk5/3p2N1/PPb1N3/4Q2B/1qR1n3 w - - 0 1)

Colonelli, Hercules

Recomm., BCF 039. Ty., 1941-1942

4B2K/7p/3R1p2/nPk5/3p2N1/PPb1N3/4Q2B/1qR1n3

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.b4#
    • 1...Qd3
      • 2.b4#
    • 1...Qe4
      • 2.b4#
    • 1...Qf5
      • 2.b4#
    • 1...Qg6
      • 2.b4#
    • 1...Qa1
      • 2.b4#
    • 1...Sxb3
      • 2.Rc6#
      • 2.Qc4#
    • 1...Sc4
      • 2.Qxc4#
    • 1...Sc6
      • 2.Rxc6#
    • 1...Sb7
      • 2.Rc6#
      • 2.Qc4#
    • 1...dxe3
      • 2.Qxe3#
  • Tries
    • 1.Rxc3+?
      • 1...Sc4
        • 2.Rxc4#
        • 2.Qxc4#
      • 1...dxc3!
  • Keys
    • 1.Sxf6!
      • threat
        • 2.Sd7#
      • 1...dxe3
        • 2.Qxe3#
      • 1...Qd3
        • 2.b4#
      • 1...Qf5
        • 2.b4#
      • 1...Sd3
        • 2.Se4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...d3
        • 2.Qh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(a);N_GUARD::P(E)
    • S(e);N_GUARD,N_SPINB(c)::QAR1(B),XS(e)
    • S(e);N_GUARD::R1(I),XS(e)
    • P(d);OGATE,XS(F)::QAB(B),XP(d)
  • Tries
    • Try
      • R(A);CHECK,XB(c)
      • Refutation
        • P(d);XR(A)
  • Actual
    • S(G);XP(g)
    • Threat
      • S(G)
    • Vars
      • P(d);OGATE,P_PINS(G),XS(F)::QAB(B),XP(d)
      • Q(a);N_GUARD::P(E)
      • S(b);S_CUTQ(a)::S(G)
      • S(e);N_GUARD,N_SPINB(c)::QAR1(B),XS(e)
      • P(d);P_PINS(G),S_CUTQ(a)::QAR(B)
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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).