MESON Chess Problem Database

Problem Display
PID: 155686 (B1Q5/3Np3/3p3B/R2n4/1p1k1n2/6R1/b2N4/7K w - - 0 1)

Drese, Gerardus Hendrikus

2nd HM., Nederlandse Bond van Probleemvrienden, 1932

B1Q5/3Np3/3p3B/R2n4/1p1k1n2/6R1/b2N4/7K

#2

8 + 7

1577 Jaarboek 1932

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qc4#
    • 1...Bc4
      • 2.Qxc4#
    • 1...b3
      • 2.Qc4#
  • Tries
    • 1.Qc2?
      • threat
        • 2.Qe4#
      • 1...Bb1
        • 2.Sb3#
        • 2.Qc4#
      • 1...Sd3
        • 2.Rxd3#
        • 2.Qxd3#
      • 1...Se3
        • 2.Sf3#
      • 1...Sf6
        • 2.Qb2#
      • 1...Sc3!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sc6#
      • 1...Kxe5
        • 2.Bg7#
      • 1...dxe5
        • 2.Qc5#
      • 1...Sd3
        • 2.Sef3#
      • 1...Se3
        • 2.Sdf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::QAR1(H)
    • B(a);N_GUARD::QAR1(H),XB(a)
    • P(b);S_CUTB(a)::QAR1(H)
  • Tries
    • Try
      • Q(H);
      • Threat
        • QAR1(H)
      • Vars
        • S(e);SBLOCK::S(B)
        • S(e);N_GUARD::QAB(H)
      • Refutation
        • S(e);
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(c);OGATEB,P_SPINS(e),S_FLIGHT,XS(F)::B(E)
      • P(f);N_GUARD,SBLOCK,XS(F)::QAB1(H)
      • S(d);SBLOCK::S(F)
      • S(e);SBLOCK::S(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).