MESON Chess Problem Database

Problem Display
PID: 51057 (8/2n1RqN1/2P1p1np/2Q4P/2PPkpKp/5pP1/2Pp4/6Br w - - 0 1)

Randell, T

Burnley Express, 1880

8/2n1RqN1/2P1p1np/2Q4P/2PPkpKp/5pP1/2Pp4/6Br

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qe8
      • 2.Qf5#
    • 1...Qg8
      • 2.Qf5#
    • 1...Qf5+
      • 2.Qxf5#
    • 1...Qxg7
      • 2.Qf5#
    • 1...Se5+
      • 2.Qxe5#
    • 1...Sxe7
      • 2.Qe5#
    • 1...Sf8
      • 2.Qe5#
    • 1...Sh8
      • 2.Qe5#
    • 1...Sb5
      • 2.Qd5#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sa6
      • 2.Qd5#
    • 1...Sa8
      • 2.Qd5#
    • 1...Se8
      • 2.Qd5#
  • Tries
    • 1.Rxe6+?
      • 1...Se5+
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...Sxe6
        • 2.Qd5#
      • 1...Qxe6+!
  • Keys
    • 1.Sxe6!
      • threat
        • 2.Sg5#
      • 1...Qxe6+
        • 2.Qf5#
      • 1...Qf5+
        • 2.Qxf5#
      • 1...Se5+
        • 2.Qxe5#
      • 1...Qxe7
        • 2.Qf5#
      • 1...Sxe7
        • 2.Qe5#
      • 1...Sxe6
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 10
  • Sets
    • Q(k);N_GUARD::QAB1(G)
    • Q(k);CHECK,N_GUARD::QAB1(G),XQ(k)
    • Q(k);N_GUARD,XS(K)::QAB1(G)
    • S(h);CHECK,N_GUARD,N_SPINP(g)::QAR1(G),XS(h)
    • S(h);N_GUARD,N_SPINP(g),XR(J)::QAR1(G)
    • S(h);N_GUARD::QAR1(G)
    • S(j);N_GUARD::QAB1(G)
    • S(j);N_GUARD::QAB1(G),XS(j)
  • Tries
    • Try
      • R(J);CHECK,XP(g)
      • Vars
        • S(j);XR(J)::QAB1(G)
      • Refutation
        • Q(k);CHECK,XR(J)
  • Actual
    • S(K);XP(g)
    • Threat
      • R(J)+S(K),DCHECK
    • Vars
      • Q(k);CHECK,N_GUARD,P_SPINQ(k),XS(K)::QAB1(G)
      • Q(k);CHECK,N_GUARD::QAB1(G),XQ(k)
      • S(h);CHECK,N_GUARD::QAR1(G),XS(h)
      • Q(k);N_GUARD,XR(J)::QAB1(G)
      • S(h);N_GUARD,XR(J)::QAR1(G)
      • S(j);N_GUARD,P_SPINS(j),XS(K)::QAB1(G)
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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).