MESON Chess Problem Database

Problem Display
PID: 82317 (1Q6/q1R1p3/2n1P1K1/3Pk3/b1B1N1n1/3Pp1P1/4N3/8 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schweizer Schach-Magazin, 1989

1Q6/q1R1p3/2n1P1K1/3Pk3/b1B1N1n1/3Pp1P1/4N3/8

#2

10 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Rxc6#
    • 1...Qa6
      • 2.Rxc6#
    • 1...Qxc7
      • 2.Qxc7#
    • 1...Sf2
      • 2.Qh8#
    • 1...Sh2
      • 2.Qh8#
    • 1...Sh6
      • 2.Qh8#
    • 1...Sb4
      • 2.Rxa7#
    • 1...Sd4
      • 2.Rxa7#
    • 1...Sa5
      • 2.Rxa7#
    • 1...Sd8
      • 2.Rxa7#
  • Tries
    • 1.Sg1?
      • threat
        • 2.Sf3#
      • 1...Kd4
        • 2.Sf3#
        • 2.Qb2#
      • 1...Sh2
        • 2.Qh8#
      • 1...Sd4
        • 2.Rxa7#
      • 1...Bd1!
    • 1.Sg5?
      • threat
        • 2.Sf7#
      • 1...Kd6
        • 2.Rxc6#
      • 1...Sd8
        • 2.Rxa7#
      • 1...Sh6!
    • 1.Rxc6+?
      • 1...Qc7
        • 2.Qxc7#
        • 2.Qb2#
      • 1...Qxb8!
    • 1.Qf8?
      • threat
        • 2.Qf4#
        • 2.Qf5#
      • 1...Sh6
        • 2.Qg7#
        • 2.Qf4#
        • 2.Qh8#
      • 1...Sd4
        • 2.Qf4#
      • 1...Sf6!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Sf3#
      • 1...Kxd4
        • 2.Qb2#
      • 1...Qxd4
        • 2.Rxc6#
      • 1...Sxd4
        • 2.Rxa7#
      • 1...Bd1
        • 2.Sxc6#
      • 1...Sh2
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(f);N_GUARD::QAB(J)+R(I),XS(e)
    • Q(f);OGATE,P_SPINQ(f),XR(I)::QAB(J),XQ(f)
    • S(c);N_GUARD::QAB(J)
    • S(e);N_GUARD::QAB(J)+R(I),XQ(f)
  • Tries
    • Try
      • S(A);
      • Threat
        • S(A)
      • Vars
        • S(c);N_GUARD::QAB(J)
        • S(e);N_GUARD,SBLOCK::QAB(J)+R(I),XQ(f)
      • Refutation
        • B(b);
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • K(d);S_FLIGHT::QAB(J)+R(I),DCHECK,XS(e)
        • S(e);N_GUARD::QAB(J)+R(I),XQ(f)
      • Refutation
        • S(c);
    • Try
      • R(I);CHECK,XS(e)
      • Refutation
        • Q(f);XQ(J)
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Vars
        • S(e);::QAB1(J)
      • Refutation
        • S(c);
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(A)::QAB(J)
      • Q(f);N_GUARD,SBLOCK,XS(A)::QAB(J)+R(I),XS(e)
      • S(e);N_GUARD,SBLOCK,XS(A)::QAB(J)+R(I),XQ(f)
      • B(b);N_GUARD::S(A),XS(e)
      • S(c);N_GUARD::QAB(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).