MESON Chess Problem Database

Problem Display
PID: 253013 (2N5/3n4/2p2r2/R7/1p2k3/1p2P2P/1B3P2/K1nQ4 w - - 0 1)

Simansky, AC

Die Schwalbe, 1930

2N5/3n4/2p2r2/R7/1p2k3/1p2P2P/1B3P2/K1nQ4

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3
      • 2.Sd6#
      • 2.Qd4#
    • 1...Rf4
      • 2.Sd6#
    • 1...Rf5
      • 2.Sd6#
    • 1...Rd6
      • 2.Sxd6#
    • 1...Rf7
      • 2.Sd6#
    • 1...Rf8
      • 2.Sd6#
    • 1...Se5
      • 2.Rxe5#
    • 1...Sb6
      • 2.Re5#
    • 1...Sb8
      • 2.Re5#
    • 1...Sf8
      • 2.Re5#
  • Tries
    • 1.f3+?
      • 1...Rxf3
        • 2.Qd4#
      • 1...Kxe3!
  • Keys
    • 1.Rf5!
      • 1...Kxf5
        • 2.Qg4#
      • 1...Rxf5
        • 2.Sd6#
      • 1...Rd6
        • 2.Sxd6#
        • 2.Rf4#
      • 1...Re6
        • 2.Rf4#
      • 1...Rg6
        • 2.Rf4#
      • 1...Rh6
        • 2.Rf4#
      • 1...Rf7
        • 2.Sd6#
      • 1...Rf8
        • 2.Sd6#
      • 1...Sa2
        • 2.Qb1#
      • 1...Se2
        • 2.Qb1#
      • 1...Sd3
        • 2.Qf3#
      • 1...Sc5
        • 2.Re5#
      • 1...Se5
        • 2.Rxe5#
      • 1...Sb6
        • 2.Re5#
      • 1...Sb8
        • 2.Re5#
      • 1...Sf8
        • 2.Re5#
      • 1...c5
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 2
  • Sets
    • R(f);N_GUARD::S(H)
    • R(f);N_GUARD::S(H),XR(f)
    • S(g);N_GUARD::R1(G),XS(g)
    • S(g);N_GUARD::R1(G)
  • Tries
    • Try
      • P(D);CHECK
      • Vars
        • R(f);SBLOCK,XP(D)::QAR1(B)
      • Refutation
        • K(d);P-FLIGHT,XP(E)
  • Actual
    • R(G);
    • Vars
      • K(d);N_GUARD,S_FLIGHT,XR(G)::QAB1(B)
      • R(f);N_GUARD,XR(G)::S(H)
      • R(f);N_GUARD::R1(G)
      • R(f);N_GUARD::S(H)
      • S(a);OGATE::QAB(B)
      • S(a);SBLOCK::QAB1(B)
      • S(g);N_GUARD::R1(G)
      • S(g);N_GUARD::R1(G),XS(g)
      • P(e);N_GUARD::QAB1(B)
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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).