MESON Chess Problem Database

Problem Display
PID: 103478 (4Q1bb/8/1p2p3/1p2kp2/1K1R4/5p2/3N1P1n/8 w - - 0 1)

Bertrand, Ernest

La Presse, 1894

4Q1bb/8/1p2p3/1p2kp2/1K1R4/5p2/3N1P1n/8

#2

5 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bf7
      • 2.Qxh8#
    • 1...Bh7
      • 2.Qxh8#
  • Tries
    • 1.Qb8+?
      • 1...Kxd4
        • 2.Qd6#
      • 1...Kf6!
  • Keys
    • 1.Qf8!
      • 1...Kxd4
        • 2.Qd6#
      • 1...Bf7
        • 2.Qxh8#
      • 1...Bh7
        • 2.Qxh8#
      • 1...Bf6
        • 2.Qd6#
      • 1...Bg7
        • 2.Qxg7#
      • 1...Sf1
        • 2.Sxf3#
      • 1...Sg4
        • 2.Sxf3#
      • 1...f4
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • B(h);OGATE::QAB(E),XB(i)
  • Tries
    • Try
      • Q(E);CHECK,N_PINP(g)
      • Vars
        • K(d);S_FLIGHT,XR(D)::QAR2(E)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • Q(E);N_PINP(g)
    • Vars
      • K(d);S_FLIGHT,XR(D)::QAR2(E)
      • B(h);OGATE::QAB(E),XB(i)
      • B(i);SBLOCK::QAB1(E)
      • B(i);N_GUARD::QAB(E),XB(i)
      • S(a);N_GUARD::S(A),XP(b)
      • P(e);OGATE::QAB1(E),XP(e)
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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).