MESON Chess Problem Database

Problem Display
PID: 249035 (2N5/5p2/1p3P2/1p3Qn1/1Pk3NK/2P2pp1/1BP5/3r2b1 w - - 0 1)

Buchwald, Julius

Die Schwalbe, 1929

2N5/5p2/1p3P2/1p3Qn1/1Pk3NK/2P2pp1/1BP5/3r2b1

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Sd6#
      • 2.Qd3#
    • 1...Rb1
      • 2.Sd6#
      • 2.Qd3#
    • 1...Rc1
      • 2.Sd6#
      • 2.Qd3#
    • 1...Re1
      • 2.Sd6#
      • 2.Qd3#
    • 1...Rf1
      • 2.Sd6#
      • 2.Qd3#
    • 1...Rd3
      • 2.Qxd3#
    • 1...Rd4
      • 2.Sxb6#
    • 1...Rd6
      • 2.Sxd6#
    • 1...Bh2
      • 2.Se3#
      • 2.Sxb6#
    • 1...Be3
      • 2.Sxe3#
    • 1...Bd4
      • 2.Sd6#
    • 1...f2
      • 2.Se3#
      • 2.Sxb6#
  • Tries
    • 1.Qe4+?
      • 1...Rd4
        • 2.Se5#
        • 2.Sxb6#
        • 2.Sd6#
        • 2.Qc6#
      • 1...Bd4
        • 2.Se3#
        • 2.Se5#
        • 2.Sxb6#
        • 2.Sd6#
      • 1...Sxe4!
    • 1.Qc5+?
      • 1...bxc5
        • 2.Sb6#
      • 1...Bxc5!
  • Keys
    • 1.Se7!
      • threat
        • 2.Se5#
      • 1...Re1
        • 2.Qd3#
        • 2.Qd5#
      • 1...Rd4
        • 2.Qc8#
      • 1...Rd5
        • 2.Qxd5#
      • 1...Bd4
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(a);N_GUARD::QAB1(G),XR(a)
    • R(a);P_PINS(E),S_CUTB(b)::S(I),XP(h)
    • R(a);N_GUARD::S(I),XR(a)
    • B(b);N_GUARD::S(E),XB(b)
    • B(b);S_CUTR(a)::S(I)
  • Tries
    • Try
      • Q(G);CHECK
      • Refutation
        • S(g);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • P(h);XQ(G)::S(I)
      • Refutation
        • B(b);XQ(G)
  • Actual
    • S(I);
    • Threat
      • S(E)
    • Vars
      • R(a);P_PINS(E),S_CUTB(b)::QAR(G)
      • R(a);N_GUARD::QAB1(G),XR(a)
      • B(b);S_CUTR(a)::QAB1(G)
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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).