MESON Chess Problem Database

Problem Display
PID: 82213 (2n4B/8/7K/1BPk2p1/1P1P4/1p2R3/nN2pp2/Q3b3 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Die Schwalbe, 1978

2n4B/8/7K/1BPk2p1/1P1P4/1p2R3/nN2pp2/Q3b3

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bd2
      • 2.Qh1#
    • 1...Bc3
      • 2.Qh1#
    • 1...Bxb4
      • 2.Qh1#
    • 1...Sc1
      • 2.Qa8#
    • 1...Sc3
      • 2.Qa8#
  • Tries
    • 1.Sd1?
      • threat
        • 2.Re5#
      • 1...Sc3
        • 2.Qa8#
      • 1...b2
        • 2.Qxa2#
      • 1...Bc3!
    • 1.Sa4?
      • threat
        • 2.Re5#
      • 1...Bc3
        • 2.Qh1#
      • 1...b2
        • 2.Qxa2#
      • 1...Sc3!
    • 1.Sc4?
      • threat
        • 2.Re5#
      • 1...Bc3
        • 2.Qh1#
      • 1...Sc3
        • 2.Qa8#
      • 1...b2!
    • 1.Qb1?
      • threat
        • 2.Qe4#
        • 2.Qf5#
      • 1...f1Q
        • 2.Qe4#
      • 1...f1R
        • 2.Qe4#
      • 1...Sc3
        • 2.Qf5#
      • 1...Se7
        • 2.Qe4#
      • 1...Sd6!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Re5#
      • 1...Bc3
        • 2.Qh1#
      • 1...Sc3
        • 2.Qa8#
      • 1...b2
        • 2.Qxa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • B(a);OGATE::QAB(A)
    • B(a);OGATE,XP(D)::QAB(A)
    • S(b);OGATE::QAB(A)
  • Tries
    • Try
      • S(B);
      • Threat
        • R1(C)
      • Vars
        • S(b);OGATE::QAB(A)
        • P(e);OGATEB::QAB(A),XS(b)
      • Refutation
        • B(a);
    • Try
      • S(B);
      • Threat
        • R1(C)
      • Vars
        • B(a);OGATE::QAB(A)
        • P(e);OGATEB::QAB(A),XS(b)
      • Refutation
        • S(b);
    • Try
      • S(B);
      • Threat
        • R1(C)
      • Vars
        • B(a);OGATE::QAB(A)
        • S(b);OGATE::QAB(A)
      • Refutation
        • P(e);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);::QAB1(A)
        • S(b);::QAR2(A)
        • S(h);::QAB1(A)
      • Refutation
        • S(h);
  • Actual
    • S(B);
    • Threat
      • R1(C)
    • Vars
      • B(a);OGATE::QAB(A)
      • S(b);OGATE::QAB(A)
      • P(e);OGATEB::QAB(A),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).