MESON Chess Problem Database

Problem Display
PID: 137661 (5rQ1/4p1N1/n3p2n/4p2P/2PBk1b1/4P3/8/2K1N3 w - - 0 1)

Reynders, Louis Joan Marie

Schaakrubriek van de Brabantsche Schaakbond, 1931

5rQ1/4p1N1/n3p2n/4p2P/2PBk1b1/4P3/8/2K1N3

#2

8 + 8

102 Probleemblad 2010
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Qa8#
    • 1...Rf2
      • 2.Qa8#
    • 1...Rf3
      • 2.Qa8#
    • 1...Rf4
      • 2.Qa8#
    • 1...Rf5
      • 2.Qa8#
    • 1...Rf6
      • 2.Qa8#
    • 1...Rf7
      • 2.Qa8#
    • 1...Ra8
      • 2.Qxa8#
  • Tries
    • 1.Qxe6?
      • threat
        • 2.Qd5#
        • 2.Qxe5#
        • 2.Qc6#
      • 1...Rf5
        • 2.Qd5#
        • 2.Qc6#
      • 1...Rf6
        • 2.Qd5#
        • 2.Qxe5#
      • 1...Rc8
        • 2.Qd5#
        • 2.Qxe5#
      • 1...Rd8
        • 2.Qxe5#
      • 1...Sb4
        • 2.Qxe5#
      • 1...Sc7
        • 2.Qxe5#
      • 1...Sb8
        • 2.Qd5#
        • 2.Qxe5#
      • 1...Sf7
        • 2.Qxg4#
        • 2.Qd5#
        • 2.Qc6#
      • 1...Bxe6!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Sg3#
      • 1...Kxf5
        • 2.Qg6#
      • 1...Rxf5
        • 2.Qa8#
      • 1...Bxf5
        • 2.Qg2#
      • 1...Sxf5
        • 2.Qxg4#
      • 1...exd4
        • 2.Qxe6#
      • 1...exf5
        • 2.Qd5#

This anticipates 101764(1990)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • R(h);OGATE,P_PINS(B)::QAB(H)
    • R(h);OGATE::QAB(H)
    • R(h);OGATE::QAB(H),XR(h)
  • Tries
    • Try
      • Q(H);P_PINP(c),XP(e)
      • Threat
        • DUALS(3)
      • Vars
        • R(h);::QAR1(H),XP(c)
        • S(d);::QAR1(H),XP(c)
      • Refutation
        • B(b);N_SPINP(c),XQ(H)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • K(a);OGATEB,S_FLIGHT,XS(G)::QAB1(H)
      • R(h);OGATE,SBLOCK,XS(G)::QAB(H)
      • B(b);OGATE,SBLOCK,XS(G)::QAB(H)
      • S(f);N_GUARD,XS(G)::QAR2(H),XB(b)
      • P(c);OGATEB,XB(E)::QAR2(H),XP(e)
      • P(e);OGATE,SBLOCK,XS(G)::QAB1(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).