MESON Chess Problem Database

Problem Display
PID: 181134 (nN1R2n1/3Q4/1P1PP2p/1r1k3r/3B3p/1P3b2/3RPN2/2K5 w - - 0 1)

van Dijk, Johannes

De Maasbode, 1904

nN1R2n1/3Q4/1P1PP2p/1r1k3r/3B3p/1P3b2/3RPN2/2K5

#2

12 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5+
      • 2.Bc3#
    • 1...Re5
      • 2.Be3#
    • 1...Bg4
      • 2.e4#
    • 1...Sc7
      • 2.dxc7#
    • 1...Se7
      • 2.dxe7#
  • Tries
    • 1.Re8?
      • threat
        • 2.Qc6#
      • 1...Rc5+
        • 2.Bc3#
      • 1...Se7
        • 2.dxe7#
      • 1...Rxb6!
  • Keys
    • 1.Qf7!
      • threat
        • 2.e7#
      • 1...Rc5+
        • 2.Bc3#
      • 1...Re5
        • 2.Be3#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Bg4
        • 2.e4#
      • 1...Sc7
        • 2.dxc7#
      • 1...Se7
        • 2.dxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(c);CHECK,SBLOCK::R(B)+B(F)
    • R(e);SBLOCK::R(B)+B(F)
    • B(a);N_GUARD::P(C)
    • S(g);OGATE::QAR(J)+P(H),XS(g)
    • S(h);OGATE::QAR(J)+P(H),XS(h)
  • Tries
    • Try
      • R(L);
      • Threat
        • QAB1(J)
      • Vars
        • R(c);CHECK,SBLOCK::R(B)+B(F)
        • S(h);OGATE::QAR(J)+P(H),XS(h)
      • Refutation
        • R(c);XP(G)
  • Actual
    • Q(J);
    • Threat
      • QAB(J)+P(I)
    • Vars
      • R(c);CHECK,SBLOCK::R(B)+B(F)
      • R(e);SBLOCK::R(B)+B(F)
      • R(e);N_GUARD::QAR2(J),XR(e)
      • B(a);N_GUARD::P(C)
      • S(g);OGATE::R(L)+P(H),XS(g)
      • S(h);OGATE::R(L)+P(H),XS(h)
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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).