MESON Chess Problem Database

Problem Display
PID: 16984 (4N2Q/1K6/1Rp1p2b/2k3qR/3n1N2/PP2n3/4p3/3r2B1 w - - 0 1)

Seilberger, Johann Joseph Petrus Adrianus

7th HM., Amusement Magazine, 1945

4N2Q/1K6/1Rp1p2b/2k3qR/3n1N2/PP2n3/4p3/3r2B1

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bf8
      • 2.Qxf8#
    • 1...Sc4
      • 2.b4#
    • 1...Sd5
      • 2.Sxe6#
    • 1...Sef5
      • 2.Qe5#
    • 1...Sc2
      • 2.Qc3#
    • 1...Sxb3
      • 2.Qc3#
    • 1...Sf3
      • 2.Qc3#
    • 1...Sb5
      • 2.Rxc6#
    • 1...Sdf5
      • 2.Qc3#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Se4#
      • 1...Sxb3
        • 2.Rxc6#
      • 1...Kxd6!
    • 1.Qe5+?
      • 1...Sd5
        • 2.Sxe6#
        • 2.Qd6#
      • 1...Qxe5!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qe7#
      • 1...Sxb3
        • 2.Qc3#
      • 1...Bf8
        • 2.Qxf8#
      • 1...Sc4
        • 2.b4#
      • 1...Sd5
        • 2.Sxe6#
      • 1...Sef5
        • 2.Qe5#
      • 1...Sdc2
        • 2.Qc3#
      • 1...Sf3
        • 2.Qc3#
      • 1...Sb5
        • 2.Rxc6#
      • 1...Sdf5
        • 2.Qc3#
      • 1...e5
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(i);N_GUARD::QAB(I),XB(i)
    • S(c);P_SPINS(d),SBLOCK::P(C)
    • S(c);N_SPINQ(f),P_SPINS(d),SBLOCK::S(D),XP(h)
    • S(c);N_GUARD,N_SPINQ(f),P_SPINS(d),S_CUTQ(f)::QAR2(I)
    • S(d);OGATE,P_SPINS(c)::QAR2(I)
    • S(d);OGATE,P_SPINS(c),XP(C)::QAR2(I)
    • S(d);N_GUARD,P_SPINS(c),SBLOCK::R1(F),XP(g)
    • S(d);N_SPINQ(f),OGATE,P_SPINS(c)::QAR2(I)
  • Tries
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • S(d);N_GUARD,P_SPINS(c),XP(C)::R1(F),XP(g)
      • Refutation
        • K(e);N_SPINQ(f),P_SPINP(g),S_FLIGHT,XS(H)
    • Try
      • Q(I);CHECK,N_PINQ(f)
      • Refutation
        • Q(f);P_SPINQ(f),XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAB(I)
    • Vars
      • S(d);OGATE,P_SPINS(c),XP(C)::QAR2(I)
      • B(i);N_GUARD::QAB(I),XB(i)
      • S(c);P_SPINS(d),SBLOCK::P(C)
      • S(c);N_SPINQ(f),P_SPINS(d),SBLOCK::S(D),XP(h)
      • S(c);N_GUARD,N_SPINQ(f),P_SPINS(d),S_CUTQ(f)::QAR2(I)
      • S(d);OGATE,P_SPINS(c)::QAR2(I)
      • S(d);N_GUARD,P_SPINS(c),SBLOCK::R1(F),XP(g)
      • S(d);N_SPINQ(f),OGATE,P_SPINS(c)::QAR2(I)
      • P(h);N_SPINQ(f),OGATE::QAB1(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).