MESON Chess Problem Database

Problem Display
PID: 108228 (2K1N3/pR2P3/2kNn2R/3r4/PP1q1n2/8/b4B1Q/7B w - - 0 1)

Buchner, Rudolf

La Settimana Enigmistica, 1935

2K1N3/pR2P3/2kNn2R/3r4/PP1q1n2/8/b4B1Q/7B

#2

11 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.b5#
    • 1...Qc3
      • 2.b5#
    • 1...Qe5
      • 2.b5#
    • 1...Qf6
      • 2.b5#
    • 1...Qg7
      • 2.b5#
    • 1...Qh8
      • 2.b5#
    • 1...Qd1
      • 2.b5#
    • 1...Qd2
      • 2.b5#
    • 1...Sc5
      • 2.b5#
    • 1...Sd8
      • 2.exd8S#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Sa5#
        • 2.Rc7#
      • 1...Qxc4
        • 2.Rc7#
      • 1...Qc5
        • 2.Se5#
        • 2.Rc7#
      • 1...Qe5
        • 2.Sa5#
        • 2.Sxe5#
        • 2.b5#
      • 1...Qb6
        • 2.Se5#
      • 1...Qf6
        • 2.Sa5#
        • 2.b5#
      • 1...Qe4
        • 2.Rc7#
      • 1...Sg2
        • 2.Rc7#
        • 2.Qc7#
      • 1...Sg6
        • 2.Sa5#
        • 2.Qd6#
      • 1...a5
        • 2.Sxa5#
        • 2.Rc7#
      • 1...Bxc4!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Sd8#
      • 1...Qb6
        • 2.Se5#
      • 1...Qf6
        • 2.b5#
      • 1...Qe4
        • 2.Rc7#
      • 1...Sg2
        • 2.Qc7#
      • 1...Sg6
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(b);::P(E)
    • Q(b);P_PINS(K)::P(E)
    • S(f);SBLOCK::P(E)
    • S(f);OGATE::PXS(f)=S
  • Tries
    • Try
      • S(F);P_PINS(f)
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);XS(F)::R1(H)
        • Q(b);N_GUARD::S(F)
        • Q(b);N_SPINR(d)::R1(H)
      • Refutation
        • B(a);XS(F)
  • Actual
    • S(F);P_PINS(f)
    • Threat
      • S(F)
    • Vars
      • Q(b);N_GUARD::S(F)
      • Q(b);N_SPINS(f)::P(E)
      • Q(b);N_SPINR(d)::R1(H)
      • S(c);N_SPINR(d),OGATE::QAR1(C)
      • S(c);N_SPINS(f),OGATE::QAR1(C)
HTML5 logo

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).