MESON Chess Problem Database

Problem Display
PID: 589 (3n4/6R1/4Pppp/3P1kBR/K4NNr/3PP2Q/2p1q1r1/4b2B w - - 0 1)

Lipton, Michael

1st HM., The Observer, 1966

3n4/6R1/4Pppp/3P1kBR/K4NNr/3PP2Q/2p1q1r1/4b2B

#2

12 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.e4#
    • 1...Qf1
      • 2.e4#
    • 1...Qd2
      • 2.e4#
    • 1...Qf2
      • 2.e4#
    • 1...Rg1
      • 2.Be4#
    • 1...Rf2
      • 2.Be4#
    • 1...Rh2
      • 2.Be4#
    • 1...Rg3
      • 2.Be4#
  • Keys
    • 1.Sxg6!
      • threat
        • 2.Se7#
        • 2.Bxh4#
      • 1...Qxg4+
        • 2.e4#
      • 1...Rgxg4+
        • 2.Be4#
      • 1...Rhxg4+
        • 2.Bf4#
      • 1...Qxd3
        • 2.Qf3#
      • 1...Qxe3
        • 2.Se7#
      • 1...Rxh3
        • 2.Sxh6#
      • 1...Rxh5
        • 2.Se7#
      • 1...Sxe6
        • 2.Se7#
      • 1...fxg5
        • 2.Se7#
      • 1...hxg5
        • 2.Se7#
      • 1...Bb4
        • 2.Sxh6#
        • 2.Sxh4#
        • 2.Bxh4#
      • 1...Sc6
        • 2.Bxh4#
      • 1...Sf7
        • 2.Se7#

There are these versions: 263231

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 8
  • Sets
    • Q(c);N_GUARD::P(C)
    • R(d);OGATE::B(A)
  • Actual
    • S(F);P_SPINS(G),XP(h)
    • Threat
      • DUALS(2)
    • Vars
      • Q(c);CHECK,N_GUARD,P_SPINQ(c),XS(G)::P(C)
      • R(d);CHECK,OGATE,P_SPINR(d),XS(G)::B(A)
      • R(e);CHECK,N_GUARD,P_SPINR(e),XS(G)::R(J)+B(I)
      • Q(c);N_GUARD,XP(B)::QAR2(D)
      • Q(c);XP(C)::S(F)
      • R(e);N_PINS(G),XQ(D)::S(G),XP(i)
      • R(e);N_PINS(G),XR(J)::S(F)
      • S(j);XP(K)::S(F)
      • P(g);P_SPINP(g),XB(I)::S(F)
      • P(i);P_SPINP(i),XB(I)::S(F)
      • S(j);::R(J)+B(I),XR(e)
      • S(j);::S(F)
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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).