MESON Chess Problem Database

Problem Display
PID: 73576 (4Rb2/5pr1/1Np1n2P/1Np2nPK/RPB1kPQp/P5p1/3P4/B7 w - - 0 1)

Oosterholt, Cornelis Johannes

Tijdschrift vd KNSB, 1942

4Rb2/5pr1/1Np1n2P/1Np2nPK/RPB1kPQp/P5p1/3P4/B7

#2

14 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg5+
      • 2.fxg5#
    • 1...Se3
      • 2.d3#
    • 1...Sd4
      • 2.Sc3#
    • 1...Sd6
      • 2.f5#
    • 1...Se7
      • 2.Sd6#
    • 1...f6
      • 2.Rxe6#
  • Tries
    • 1.Sd6+?
      • 1...Sxd6
        • 2.f5#
      • 1...Bxd6!
    • 1.Sd5?
      • threat
        • 2.Sdc3#
        • 2.Sf6#
        • 2.d3#
      • 1...Rxg5+
        • 2.fxg5#
      • 1...cxb4
        • 2.Sf6#
        • 2.d3#
      • 1...cxb5
        • 2.Sf6#
        • 2.d3#
      • 1...Rg6
        • 2.Sdc3#
        • 2.d3#
      • 1...Be7
        • 2.Sdc3#
        • 2.d3#
      • 1...f6
        • 2.Sdc3#
        • 2.Sxf6#
        • 2.Rxe6#
        • 2.d3#
      • 1...cxd5!
    • 1.Qe2+?
      • 1...Kxf4
        • 2.Be5#
        • 2.Qg4#
      • 1...Se3!
  • Keys
    • 1.Be2!
      • threat
        • 2.Qf3#
      • 1...Rxg5+
        • 2.fxg5#
      • 1...Sxh6
        • 2.bxc5#
      • 1...Se3
        • 2.d3#
      • 1...Sd4
        • 2.Sc3#
      • 1...Sd6
        • 2.f5#
      • 1...Se7
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(i);CHECK,OGATE,XP(J)::QAR(H)+P(G),XR(i)
    • S(e);SBLOCK::P(B)
    • S(e);SBLOCK::S(I)
    • S(e);OGATE::QAR(H)+P(G)
    • S(e);N_GUARD,N_SPINS(g),S_CUTB(j)::S(I)
    • P(h);N_GUARD::R(N),XS(g)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • S(e);OGATE,XS(I)::QAR(H)+P(G)
      • Refutation
        • B(j);XS(I)
    • Try
      • S(L);
      • Threat
        • DUALS(3)
      • Vars
        • R(i);CHECK,OGATE,XP(J)::QAR(H)+P(G),XR(i)
      • Refutation
        • P(f);XS(L)
    • Try
      • Q(H);CHECK
      • Refutation
        • S(e);N_SPINS(g),P_SPINS(e)
  • Actual
    • B(F);
    • Threat
      • QAB1(H)
    • Vars
      • R(i);CHECK,OGATE,XP(J)::QAR(H)+P(G),XR(i)
      • S(e);N_GUARD,XP(M)::R(D)+P(E),XP(d)
      • S(e);SBLOCK::P(B)
      • S(e);SBLOCK::S(I)
      • S(e);OGATE::QAR(H)+P(G)
      • S(e);N_GUARD,N_SPINS(g),S_CUTB(j)::S(I)
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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).