MESON Chess Problem Database

Problem Display
PID: 82266 (n1B2N1K/7Q/2p2B1P/8/1r2PkPr/5pn1/5P2/3N4 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Problemas, 1984

n1B2N1K/7Q/2p2B1P/8/1r2PkPr/5pn1/5P2/3N4

#2

10 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4
      • 2.Sg6#
    • 1...Rxg4
      • 2.Se6#
    • 1...Sf1
      • 2.Qf5#
    • 1...Sh1
      • 2.Qf5#
    • 1...Se2
      • 2.Qf5#
    • 1...Sxe4
      • 2.Sg6#
      • 2.Qf5#
    • 1...Sf5
      • 2.Qxf5#
    • 1...Sh5
      • 2.Qf5#
  • Tries
    • 1.Se3?
      • threat
        • 2.Se6#
      • 1...Rxe4
        • 2.Sg6#
      • 1...Sf5
        • 2.Qxf5#
      • 1...Sc7!
    • 1.Be5+?
      • 1...Kg5
        • 2.Qg6#
        • 2.Qg7#
      • 1...Kxe5!
    • 1.Bf5?
      • threat
        • 2.Se6#
        • 2.Sg6#
      • 1...Rxe4
        • 2.Sg6#
      • 1...Rxg4
        • 2.Se6#
      • 1...Rxh6
        • 2.Se6#
        • 2.Qxh6#
      • 1...Sxf5
        • 2.Qxf5#
      • 1...Sc7
        • 2.Sg6#
        • 2.Qxc7#
      • 1...Rb8!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Sg6#
      • 1...Rxg4
        • 2.Se6#
      • 1...Rxh6
        • 2.Qxh6#
      • 1...Sf5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • R(c);SBLOCK,XP(C)::S(I)
    • R(e);SBLOCK,XP(D)::S(I)
    • S(b);N_GUARD::QAR1(G)
    • S(b);N_GUARD::QAR1(G),XS(b)
  • Tries
    • Try
      • S(A);
      • Threat
        • S(I)
      • Vars
        • R(c);SBLOCK,XP(C)::S(I)
        • S(b);N_GUARD::QAR1(G),XS(b)
      • Refutation
        • S(g);
    • Try
      • B(E);CHECK
      • Refutation
        • K(d);S_FLIGHT,XB(E)
    • Try
      • B(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);XP(C)::S(I)
        • R(e);XP(D)::S(I)
        • S(b);OGATE,XB(H)::QAR1(G),XS(b)
      • Refutation
        • R(c);P_PINS(I)
  • Actual
    • S(A);
    • Threat
      • S(I)
    • Vars
      • R(e);SBLOCK,XP(D)::S(I)
      • R(e);OGATE,P_PINQ(G),XP(F)::QAB(G),XR(e)
      • S(b);N_GUARD::QAR1(G),XS(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).