MESON Chess Problem Database

Problem Display
PID: 75901 (8/p5p1/k7/5Rr1/2N3p1/q2N2K1/QR6/r2b1B2 w - - 0 1)

Siehndel, Karl-Heinz

Die Schwalbe, 2007

8/p5p1/k7/5Rr1/2N3p1/q2N2K1/QR6/r2b1B2

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa2
      • 2.Sc5#
    • 1...Qa4
      • 2.Sc5#
    • 1...Qa5
      • 2.Sc5#
    • 1...Bf3
      • 2.Sc5#
    • 1...g6
      • 2.Rf6#
  • Tries
    • 1.Qxa3+?
      • 1...Ba4
        • 2.Sc5#
      • 1...Rxa3!
  • Keys
    • 1.Bg2!
      • threat
        • 2.Bb7#
      • 1...Bb3
        • 2.Sb4#
      • 1...Bf3
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(c);N_PINS(D),N_SPINQ(c),XQ(B)::S(D)
    • Q(c);N_PINS(D)::S(D)
    • B(b);N_PINS(D)::S(D)
    • P(h);N_GUARD::R(G)
  • Tries
    • Try
      • Q(B);CHECK,N_SPINS(D),XQ(c)
      • Vars
        • B(b);P_SPINB(b)::S(D)
      • Refutation
        • R(a);P_PINS(D),XQ(B)
  • Actual
    • B(A);
    • Threat
      • B(A)
    • Vars
      • B(b);N_PINS(D)::S(D)
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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).