MESON Chess Problem Database

Problem Display
PID: 102770 (8/b6b/3pN3/3kpP2/1P4N1/1K2p1P1/2P5/Q7 w - - 0 1)

Ferber, Eugene

L'Echiquier, 1925

8/b6b/3pN3/3kpP2/1P4N1/1K2p1P1/2P5/Q7

#2

8 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.Qa8#
    • 1...Bc5
      • 2.Qa8#
    • 1...Bb6
      • 2.Qa8#
    • 1...Bb8
      • 2.Qa8#
  • Tries
    • 1.Qa6?
      • threat
        • 2.Sf6#
        • 2.Qc4#
        • 2.Qb7#
      • 1...Bxf5
        • 2.Qc4#
      • 1...Bb6
        • 2.Qc4#
        • 2.Qb7#
        • 2.Qa8#
      • 1...Bd4
        • 2.Sf6#
        • 2.Qb7#
        • 2.Qa8#
      • 1...Bc5
        • 2.Sf6#
        • 2.Qb7#
        • 2.Qa8#
      • 1...e4
        • 2.Qc4#
        • 2.Qb7#
        • 2.c4#
      • 1...Ke4!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Sf6#
      • 1...Ke4
        • 2.Sf6#
      • 1...Bxd4
        • 2.Qa8#
      • 1...exd4
        • 2.Qh1#
      • 1...e4
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(e);OGATE::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • B(f);XP(G)::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(H);
    • Threat
      • S(F)
    • Vars
      • K(b);S_FLIGHT::S(F)
      • B(e);OGATE,SBLOCK,XS(H)::QAB(A)
      • P(c);N_GUARD,SBLOCK,XS(H)::QAB(A)
      • P(c);SBLOCK::P(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).