MESON Chess Problem Database

Problem Display
PID: 66870 (qb1B4/p7/2Nk4/1B1P1Qn1/4p3/1N3p1n/2pR3K/8 w - - 0 1)

Heath, AW

Chess, 1947

qb1B4/p7/2Nk4/1B1P1Qn1/4p3/1N3p1n/2pR3K/8

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc6
      • 2.dxc6#
    • 1...Bc7
      • 2.Be7#
    • 1...Se6
      • 2.Qxe6#
      • 2.dxe6#
    • 1...Sf7
      • 2.Qe6#
    • 1...Sh7
      • 2.Qe6#
  • Tries
    • 1.Qg6+?
      • 1...Se6
        • 2.Qxe6#
        • 2.dxe6#
      • 1...Kd7+!
    • 1.Qf6+?
      • 1...Se6
        • 2.Qe7#
        • 2.Qxe6#
        • 2.dxe6#
      • 1...Kd7+!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Qf8#
      • 1...Kxc5+
        • 2.d6#
      • 1...Qxc6
        • 2.dxc6#
      • 1...Qb7
        • 2.Sxb7#
      • 1...Se6
        • 2.dxe6#
      • 1...Sf7
        • 2.Sxe4#
      • 1...Sh7
        • 2.Sxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(h);OGATE,XS(G)::R(A)+P(E),XQ(h)
    • B(i);SBLOCK::B(H)
    • S(e);N_GUARD::QAR1(F)
  • Tries
    • Try
      • Q(F);CHECK
      • Refutation
        • K(f);CHECK,P-FLIGHT
    • Try
      • Q(F);CHECK
      • Refutation
        • K(f);CHECK,P-FLIGHT
  • Actual
    • S(C);
    • Threat
      • QAB(F)
    • Vars
      • K(f);CHECK,OGATE,S_FLIGHT,XS(C)::QAR(F)+P(E)
      • Q(h);OGATE,XS(G)::R(A)+P(E),XQ(h)
      • Q(h);N_GUARD::S(C),XQ(h)
      • S(e);OGATE::R(A)+P(E),XS(e)
      • S(e);N_GUARD::S(C),XP(d)
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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).