MESON Chess Problem Database

Problem Display
PID: 196678 (3Nk3/3R4/4p1N1/1P2q3/3pQ3/7B/8/2K5 w - - 0 1)

White, Alain Campbell

Good Companions, 1919

3Nk3/3R4/4p1N1/1P2q3/3pQ3/7B/8/2K5

#2

7 + 4

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.Qxe6#
    • 1...Qg3
      • 2.Qxe6#
    • 1...Qb8
      • 2.Qxe6#
    • 1...Qh8
      • 2.Qxe6#
    • 1...Qxb5
      • 2.Qxe6#
    • 1...Qh5
      • 2.Qxe6#
  • Keys
    • 1.Sxe6!
      • threat
        • 2.Sc7#
        • 2.Sg7#
        • 2.Re7#
      • 1...Qf4+
        • 2.Sexf4#
      • 1...Qc7+
        • 2.Sxc7#
      • 1...Qc5+
        • 2.Sxc5#
      • 1...Qg5+
        • 2.Sxg5#
      • 1...Kxd7
        • 2.Qc6#
      • 1...Qxe6
        • 2.Qxe6#
      • 1...Qd6
        • 2.Sc7#
        • 2.Sg7#
      • 1...Qf6
        • 2.Sc7#
        • 2.Sg7#
      • 1...Qg7
        • 2.Sc7#
        • 2.Sxg7#
      • 1...Qf5
        • 2.Re7#

This is a version of 101294

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 6
  • Sets
    • Q(b);OGATE,P_SPINP(c)::QAR2(C),XP(c)
    • Q(b);OGATE,P_SPINP(c),XP(D)::QAR2(C),XP(c)
  • Actual
    • S(G);XP(c)
    • Threat
      • DUALS(3)
    • Vars
      • Q(b);CHECK::QAR(C)+S(G),XQ(b)
      • Q(b);CHECK::QAR(C)+S(G),DCHECK,XQ(b)
      • K(d);OGATEB,S_FLIGHT,XR(F)::QAB1(C)
      • Q(b);OGATE,P_SPINQ(b),XS(G)::QAR2(C),XQ(b)
      • Q(b);::R1(F)
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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).