MESON Chess Problem Database

Problem Display
PID: 33024 (4R3/8/R5P1/QK1N1k2/BP5p/3p1p1n/3B1p2/5Nq1 w - - 0 1)

Berghmans, Josef

De Problemist, 1929

4R3/8/R5P1/QK1N1k2/BP5p/3p1p1n/3B1p2/5Nq1

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qg4
      • 2.Rf6#
    • 1...Sg5
      • 2.Sfe3#
  • Tries
    • 1.Re5+?
      • 1...Kg4
        • 2.Sf6#
      • 1...Kxe5!
    • 1.Qd8?
      • threat
        • 2.Sfe3#
        • 2.Qd7#
        • 2.Qc8#
      • 1...Qxf1
        • 2.Qd7#
        • 2.Qc8#
      • 1...Qxg6
        • 2.Sfe3#
      • 1...Qg5
        • 2.Qd7#
        • 2.Qc8#
      • 1...Sf4
        • 2.Sfe3#
        • 2.Sde3#
      • 1...Sg5
        • 2.Sfe3#
      • 1...Kg4!
  • Keys
    • 1.Kc4!
      • threat
        • 2.Bd7#
      • 1...Qg4+
        • 2.Sf4#
      • 1...Kg4
        • 2.Sf6#
      • 1...Qxg6
        • 2.Sf6#
      • 1...Sf4
        • 2.Sde3#
      • 1...Sg5
        • 2.Sfe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(a);SBLOCK::R1(H)
    • S(e);SBLOCK::S(A)
  • Tries
    • Try
      • R(J);CHECK
      • Vars
        • K(g);S_FLIGHT::S(G)
      • Refutation
        • K(g);P-FLIGHT,XR(J)
    • Try
      • Q(E);
      • Threat
        • DUALS(3)
      • Vars
        • Q(a);XP(I)::S(A)
        • S(e);::S(A)
      • Refutation
        • K(g);S_FLIGHT
  • Actual
    • K(F);S_FLIGHT
    • Threat
      • B(C)
    • Vars
      • Q(a);CHECK,SBLOCK::QAR(E)+S(G)
      • K(g);S_FLIGHT::S(G)
      • Q(a);SBLOCK,XP(I)::QAR(E)+S(G)
      • S(e);SBLOCK::QAR(E)+S(G),DCHECK
      • S(e);SBLOCK::S(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).