MESON Chess Problem Database

Problem Display
PID: 235121 (1B1Q3N/3Bb3/7N/2p1r2p/2R1bk1P/Rn4p1/3p2P1/2nK4 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schach, 1952

1B1Q3N/3Bb3/7N/2p1r2p/2R1bk1P/Rn4p1/3p2P1/2nK4

#2

10 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bg5
      • 2.Qxg5#
    • 1...Bf8
      • 2.Qg5#
    • 1...Sa1
      • 2.Sg6#
      • 2.Rf3#
    • 1...Sa5
      • 2.Sg6#
      • 2.Rf3#
  • Tries
    • 1.Sg4?
      • threat
        • 2.Sg6#
        • 2.Bxe5#
      • 1...Bd6
        • 2.Sg6#
      • 1...Bf6
        • 2.Sg6#
        • 2.Qxf6#
      • 1...Sd3
        • 2.Sg6#
      • 1...Sd4
        • 2.Bxe5#
      • 1...hxg4!
  • Keys
    • 1.Bf5!
      • threat
        • 2.Rxe4#
      • 1...Ke3
        • 2.Qxd2#
      • 1...Bd6
        • 2.Qg5#
      • 1...Sd4
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(j);OGATE::QAB1(I),XB(j)
    • B(j);OGATE::QAB1(I)
  • Tries
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • B(j);N_SPINR(h)::S(J)
        • S(a);::S(J)
        • S(c);N_SPINB(e)::B(H),XR(h)
      • Refutation
        • P(i);XS(F)
  • Actual
    • B(G);
    • Threat
      • R1(D),XB(e)
    • Vars
      • K(f);N_SPINB(e),N_SPINR(h),P_SPINS(c),S_FLIGHT::QAB1(I),XP(b)
      • B(j);N_SPINR(h),OGATE::QAB1(I)
      • S(c);N_SPINB(e)::S(J)
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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).