MESON Chess Problem Database

Problem Display
PID: 174184 (2R2K2/1p2Q3/B7/2pkBp2/2r2r2/5R2/1qn1n1N1/8 w - - 0 1)

Buchner, Richard

Berliner Arbeiter Schachklub, 1927

2R2K2/1p2Q3/B7/2pkBp2/2r2r2/5R2/1qn1n1N1/8

#2

7 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Bxb7#
    • 1...Qc1
      • 2.Bxb7#
    • 1...Qa3
      • 2.Bxb7#
    • 1...Qc3
      • 2.Bxb7#
    • 1...Qd4
      • 2.Bxb7#
    • 1...Qa2
      • 2.Bxb7#
    • 1...Rce4
      • 2.Rxc5#
      • 2.Qd6#
    • 1...Rfe4
      • 2.Qd6#
    • 1...b5
      • 2.Bb7#
    • 1...b6
      • 2.Bb7#
  • Tries
    • 1.Rd8+?
      • 1...Kc6
        • 2.Rd6#
        • 2.Qd6#
        • 2.Qf6#
        • 2.Qe6#
        • 2.Qc7#
      • 1...Ke4!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Qe5#
      • 1...Kxd4
        • 2.Rd8#
      • 1...Qxd4
        • 2.Bxb7#
      • 1...Rcxd4
        • 2.Rxc5#
      • 1...Rfxd4
        • 2.Rxf5#
      • 1...Scxd4
        • 2.Se3#
      • 1...Sexd4
        • 2.Sxf4#
      • 1...cxd4
        • 2.Bxc4#
      • 1...Re4
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 7
  • Sets
    • Q(a);N_GUARD::B(D),XP(i)
    • R(e);SBLOCK::QAR1(E)
    • P(i);S_CUTQ(a)::B(D)
  • Tries
    • Try
      • R(F);CHECK
      • Refutation
        • K(g);S_FLIGHT
  • Actual
    • B(C);
    • Threat
      • QAR1(E)
    • Vars
      • K(g);P-FLIGHT,XB(C)::R(F)
      • Q(a);N_GUARD,SBLOCK,XB(C)::B(D),XP(i)
      • R(d);N_GUARD,SBLOCK,XB(C)::R1(F),XP(f)
      • R(e);OGATE,SBLOCK,XB(C)::R(B),XP(h)
      • S(b);N_GUARD,SBLOCK,XB(C)::S(A)
      • S(c);N_GUARD,SBLOCK,XB(C)::S(A),XR(e)
      • P(f);SBLOCK,XB(C)::B(D),XR(d)
      • R(e);SBLOCK::QAR2(E)
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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).