MESON Chess Problem Database

Problem Display
PID: 30869 (4N3/r3p2p/3b3K/4qk1B/1p3pN1/5P2/2b2n2/4RQ2 w - - 0 1)

Gilberg, Charles Alexander

The Westminster Papers, 1875

4N3/r3p2p/3b3K/4qk1B/1p3pN1/5P2/2b2n2/4RQ2

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qg7+
      • 2.Sxg7#
    • 1...Qxe1
      • 2.Sg7#
    • 1...Qe2
      • 2.Sg7#
    • 1...Qe3
      • 2.Sg7#
    • 1...Qe4
      • 2.Sg7#
    • 1...Qa5
      • 2.Sg7#
    • 1...Qb5
      • 2.Sg7#
    • 1...Qc5
      • 2.Sg7#
    • 1...Qd5
      • 2.Sg7#
    • 1...Bc5
      • 2.Rxe5#
    • 1...Sxg4+
      • 2.Bxg4#
  • Keys
    • 1.Qb5!
      • threat
        • 2.Sg7#
      • 1...Sxg4+
        • 2.Bxg4#
      • 1...Ke6
        • 2.Sg7#
      • 1...Bc5
        • 2.Rxe5#
      • 1...e6
        • 2.Sxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • Q(e);CHECK,N_GUARD::S(G),XQ(e)
    • Q(e);N_GUARD,XR(A)::S(G)
    • Q(e);N_GUARD::S(G)
    • B(g);N_GUARD::R1(A),XQ(e)
    • S(b);CHECK,OGATE,XS(D)::B(E),XS(b)
  • Actual
    • Q(B);P_PINQ(e)
    • Threat
      • S(G)
    • Vars
      • S(b);CHECK,OGATE,XS(D)::B(E),XS(b)
      • K(f);S_FLIGHT::S(G)
      • B(g);N_GUARD,N_SPINQ(e)::R1(A),XQ(e)
      • P(i);N_GUARD,SBLOCK::S(G),XB(g)
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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).