MESON Chess Problem Database

Problem Display
PID: 205740 (4QN1N/2K5/6R1/R3nb1k/7p/3p1r1n/1b6/3Br3 w - - 0 1)

Rietveld, Johannes Jacob

1st HM., Tijdschrift van den Nederlandsch-Indischen Schaakbond, 1925

4QN1N/2K5/6R1/R3nb1k/7p/3p1r1n/1b6/3Br3

#2

7 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bxg6
      • 2.Qxg6#
    • 1...Sc4
      • 2.Bxf3#
    • 1...Sc6
      • 2.Bxf3#
    • 1...Sxg6
      • 2.Qxg6#
    • 1...Sd7
      • 2.Bxf3#
    • 1...Sf7
      • 2.Bxf3#
  • Tries
    • 1.Bxf3+?
      • 1...Bg4
        • 2.Bxg4#
      • 1...Sg4
        • 2.Bxg4#
      • 1...Sxf3!
    • 1.Rg5+?
      • 1...Kh6
        • 2.Qh5#
      • 1...Kxg5!
  • Keys
    • 1.Sh7!
      • threat
        • 2.Sf6#
      • 1...Bxg6
        • 2.Qxg6#
      • 1...Sxg6
        • 2.Qxg6#
      • 1...Bg4
        • 2.Rf6#
      • 1...Sc4
        • 2.Bxf3#
      • 1...Sg4
        • 2.Re6#
      • 1...Sc6
        • 2.Bxf3#
      • 1...Sd7
        • 2.Bxf3#
      • 1...Sf7
        • 2.Bxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(h);OGATE,P_SPINB(h),P_SPINS(g),XR(C)::QAB1(E),XB(h)
    • S(g);N_GUARD,P_SPINB(h)::B(A),XR(d)
    • S(g);OGATE,P_SPINB(h),P_SPINS(g),XR(C)::QAB1(E),XS(g)
  • Tries
    • Try
      • B(A);CHECK,XR(d)
      • Vars
        • B(h);N_GUARD,P_SPINB(h),P_SPINS(g)::B(A),XB(h)
        • S(g);N_GUARD,P_SPINB(h),P_SPINS(g)::B(A),XS(g)
      • Refutation
        • S(g);P_SPINB(h),XB(A)
    • Try
      • R(C);CHECK
      • Vars
        • K(i);N_SPINR(d),P-FLIGHT::QAR1(E)
      • Refutation
        • K(i);N_SPINR(d),P-FLIGHT,XR(C)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • B(h);OGATE,P_SPINB(h),P_SPINS(g),XR(C)::QAB1(E),XB(h)
      • S(g);OGATE,P_SPINB(h),P_SPINS(g),XR(C)::QAB1(E),XS(g)
      • B(h);N_GUARD,N_SPINR(d),P_SPINS(g),SBLOCK::QAB(E)+R(C)
      • S(g);N_GUARD,P_SPINB(h)::B(A),XR(d)
      • S(g);N_GUARD,N_SPINR(d),P_SPINB(h),SBLOCK::QAB(E)+R(C)
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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).