MESON Chess Problem Database

Problem Display
PID: 107811 (4K2n/3NN3/2p1k3/p1B1P2p/P4pp1/4q3/1n2Q1b1/8 w - - 0 1)

Braithwaite, Kenneth Holmes

Le Droit, 1982

4K2n/3NN3/2p1k3/p1B1P2p/P4pp1/4q3/1n2Q1b1/8

#2

7 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Sf8#
    • 1...Qg1
      • 2.Sf8#
    • 1...Qd2
      • 2.Sf8#
    • 1...Qf2
      • 2.Sf8#
    • 1...Qd4
      • 2.Sf8#
    • 1...Qxc5
      • 2.Sxc5#
      • 2.Sf8#
    • 1...Qa3
      • 2.Sf8#
    • 1...Qb3
      • 2.Sf8#
    • 1...Qc3
      • 2.Sf8#
    • 1...Qd3
      • 2.Sf8#
    • 1...Qf3
      • 2.Sf8#
    • 1...Qg3
      • 2.Sf8#
    • 1...Qh3
      • 2.Sf8#
    • 1...Qxe5
      • 2.Qxe5#
    • 1...h4
      • 2.Qxg4#
  • Tries
    • 1.Bd6?
      • threat
        • 2.Sf8#
      • 1...Qxe5
        • 2.Qxe5#
      • 1...Sg6!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Sc5#
        • 2.Sf8#
      • 1...Qxd4
        • 2.Sf8#
      • 1...Qxe5
        • 2.Qxe5#
      • 1...Sxa4
        • 2.Sf8#
      • 1...Qc1
        • 2.Sf8#
      • 1...Qa3
        • 2.Sf8#
      • 1...Qc3
        • 2.Sf8#
      • 1...Sd3
        • 2.Sf8#
      • 1...Sg6
        • 2.Sc5#
      • 1...c5
        • 2.Sxc5#
        • 2.Sf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • Q(c);::S(E)
    • Q(c);OGATE,P_SPINQ(c),XP(D)::QAR1(A),XQ(c)
    • P(g);N_GUARD::QAB(A),XP(e)
  • Tries
    • Try
      • B(C);
      • Threat
        • S(E)
      • Vars
        • Q(c);OGATE,P_SPINQ(c),XP(D)::QAR1(A),XQ(c)
      • Refutation
        • S(j);
  • Actual
    • B(C);
    • Threat
      • DUALS(2)
    • Vars
      • Q(c);XB(C)::S(E)
      • Q(c);OGATE,P_SPINQ(c),XP(D)::QAR1(A),XQ(c)
      • S(a);XP(B)::S(E)
      • Q(c);::S(E)
      • S(a);::S(E)
      • S(j);::S(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).