MESON Chess Problem Database

Problem Display
PID: 60158 (Q5q1/3n2r1/2Npp2b/1P1k1n1R/1K1N3R/1Pp1pP2/2r3B1/8 w - - 0 1)

Eddy, Edwin John

1st Highly Comm., Brisbane Courier, 1929

Q5q1/3n2r1/2Npp2b/1P1k1n1R/1K1N3R/1Pp1pP2/2r3B1/8

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Se5
      • 2.Se7#
    • 1...e5
      • 2.Se7#
      • 2.Sb8#
      • 2.Sd8#
  • Tries
    • 1.Re4?
      • threat
        • 2.Se7#
        • 2.Sb8#
        • 2.Sd8#
      • 1...Qb8
        • 2.Se7#
        • 2.Sxb8#
      • 1...Qc8
        • 2.Se7#
      • 1...Qd8
        • 2.Se7#
        • 2.Sb8#
        • 2.Sxd8#
      • 1...Ra2
        • 2.Se7#
      • 1...Re7
        • 2.Sxe7#
        • 2.Sb8#
        • 2.Sd8#
      • 1...Sc5
        • 2.Se7#
      • 1...Se5
        • 2.Se7#
      • 1...Sb6
        • 2.Se7#
      • 1...Sf6
        • 2.Se7#
      • 1...Sb8
        • 2.Se7#
      • 1...Sf8
        • 2.Se7#
      • 1...Qxa8!
    • 1.Rxf5+?
      • 1...Se5
        • 2.Se7#
      • 1...e5
        • 2.Se7#
        • 2.Sb8#
        • 2.Sd8#
      • 1...exf5!
  • Keys
    • 1.Se2!
      • threat
        • 2.Rd4#
      • 1...Rg4+
        • 2.fxg4#
      • 1...e5
        • 2.Sd8#
      • 1...Rd2
        • 2.Sxc3#
      • 1...Rg5
        • 2.Sf4#
      • 1...Bf4
        • 2.Sxf4#
      • 1...Bg5
        • 2.f4#
      • 1...Se5
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(i);N_SPINS(e),SBLOCK::QAB(J)+S(I),DCHECK
  • Tries
    • Try
      • R(F);
      • Threat
        • DUALS(3)
      • Vars
        • Q(k);::QAB(J)+S(I),DCHECK
        • R(a);::QAB(J)+S(I),DCHECK
        • S(i);::QAB(J)+S(I),DCHECK
        • S(i);N_SPINS(e)::QAB(J)+S(I),DCHECK
      • Refutation
        • Q(k);XQ(J)
    • Try
      • R(H);CHECK,XS(e)
      • Vars
        • S(i);P_SPINS(i)::QAB(J)+S(I),DCHECK
      • Refutation
        • P(g);XR(H)
  • Actual
    • S(E);
    • Threat
      • R1(F)
    • Vars
      • R(j);CHECK,OGATE::B(A)+P(C),XR(j)
      • P(g);N_SPINS(e),SBLOCK::QAB(J)+S(I)
      • R(a);N_GUARD::S(E),XP(b)
      • R(j);N_SPINS(e),S_CUTB(h)::S(E)
      • B(h);N_GUARD::S(E),XB(h)
      • B(h);N_SPINS(e),S_CUTR(j)::B(A)+P(C)
      • S(i);N_SPINS(e),SBLOCK::QAB(J)+S(I),DCHECK
HTML5 logo

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).