MESON Chess Problem Database

Problem Display
PID: 122056 (6K1/5p2/1p2nP1b/3p4/2npk1NQ/3N3p/3PP1r1/5R1B w - - 0 1)

Goldschmidt, Josef

Seilberger, Johann Joseph Petrus Adrianus

Jerusalem Post, 1946

6K1/5p2/1p2nP1b/3p4/2npk1NQ/3N3p/3PP1r1/5R1B

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd2
      • 2.Qh7#
    • 1...Be3
      • 2.Qh7#
    • 1...Bf4
      • 2.Qh7#
    • 1...Bg5
      • 2.Qh7#
    • 1...Bg7
      • 2.Qh7#
    • 1...Bf8
      • 2.Qh7#
    • 1...Sg5
      • 2.Sh2#
      • 2.Se3#
      • 2.Sge5#
      • 2.Sxh6#
      • 2.Rf4#
    • 1...Sg7
      • 2.Sxh6#
    • 1...h2
      • 2.Bxg2#
  • Tries
    • 1.Sc5+?
      • 1...bxc5
        • 2.d3#
      • 1...Sxc5!
    • 1.Rf4+?
      • 1...Bxf4
        • 2.Qh7#
      • 1...Sxf4!
    • 1.Qg5?
      • threat
        • 2.Sdf2#
        • 2.Sgf2#
        • 2.Qf5#
      • 1...Sxg5
        • 2.Rf4#
      • 1...Se3
        • 2.Sdf2#
        • 2.Sgf2#
        • 2.Qe5#
      • 1...Sd6
        • 2.Sdf2#
        • 2.Sgf2#
        • 2.Qe5#
      • 1...Sf4
        • 2.Sdf2#
        • 2.Sgf2#
        • 2.Rxf4#
      • 1...Sg7
        • 2.Sdf2#
        • 2.Sgf2#
        • 2.Rf4#
      • 1...Bxg5!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qf5#
      • 1...Bf4
        • 2.Sf2#
        • 2.Qh7#
      • 1...Bg5
        • 2.Qh7#
      • 1...Se3
        • 2.Qe5#
      • 1...Sd6
        • 2.Qe5#
      • 1...Sf4
        • 2.Sf2#
      • 1...Sg5
        • 2.Rf4#
      • 1...Sg7
        • 2.Sgf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • B(i);OGATE,XP(C)::QAB(G)
    • B(i);OGATE::QAB(G)
    • B(i);N_PINS(F),OGATE::QAB(G)
    • S(h);N_PINS(F)::QAR(G)+S(F),XB(i)
    • P(b);N_GUARD::B(B),XR(a)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • P(g);XS(E)::P(C)
      • Refutation
        • S(h);XS(E)
    • Try
      • R(A);CHECK
      • Vars
        • B(i);OGATE,XR(A)::QAB(G)
      • Refutation
        • S(h);XR(A)
    • Try
      • Q(G);N_SPINS(F)
      • Threat
        • DUALS(3)
      • Vars
        • S(h);N_GUARD,XQ(G)::R1(A)
      • Refutation
        • B(i);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAB1(G)
    • Vars
      • B(i);N_PINS(F),OGATE::QAB(G)
      • S(c);N_GUARD::QAR1(G)
      • S(h);SBLOCK::S(E)
      • S(h);N_GUARD,N_PINS(F),S_CUTB(i)::R1(A)
      • S(h);N_PINS(F)::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).