MESON Chess Problem Database

Problem Display
PID: 204501 (6N1/2r1p2p/p1b1P1kB/K2N1q2/7n/7P/2B1Q1pn/8 w - - 0 1)

Seib, Wilhelm

Brisbane Courier, 1925

6N1/2r1p2p/p1b1P1kB/K2N1q2/7n/7P/2B1Q1pn/8

#2

8 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bb5
      • 2.Sf4#
    • 1...Sf1
      • 2.Qg4#
    • 1...Sg4
      • 2.Qxg4#
  • Tries
    • 1.Bxf5+?
      • 1...Sxf5
        • 2.Sf4#
      • 1...Kxf5!
    • 1.Qe5?
      • threat
        • 2.Sf4#
      • 1...Kh5
        • 2.Sf4#
      • 1...Bxd5!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Sf4#
      • 1...Kh5
        • 2.Sf4#
      • 1...Bxd5
        • 2.Qe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(f);N_PINS(E)::S(E)
    • S(b);N_GUARD::QAR2(B)
    • S(b);N_GUARD::QAR2(B),XS(b)
  • Tries
    • Try
      • B(A);CHECK,N_SPINS(E),XQ(d)
      • Vars
        • S(c);SBLOCK,XB(A)::S(E)
      • Refutation
        • K(g);S_FLIGHT,XB(A)
    • Try
      • Q(B);N_SPINS(E)
      • Threat
        • S(E)
      • Vars
        • K(g);S_FLIGHT::S(E)
      • Refutation
        • B(f);XS(E)
  • Actual
    • Q(B);N_SPINS(E)
    • Threat
      • S(E)
    • Vars
      • K(g);N_SPINQ(d),S_FLIGHT::S(E)
      • B(f);OGATE,XS(E)::QAB(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).