Problem Display
PID: 134895 (1Q4n1/1K5B/1B2Pp2/1N3r2/2P1kN1p/1P1pPn2/3bpPP1/3Rq3 w - - 0 1)

Shire, David J

1st Prize, British Chess Magazine, 2007-2009

1Q4n1/1K5B/1B2Pp2/1N3r2/2P1kN1p/1P1pPn2/3bpPP1/3Rq3

#2

13 + 10


15 British Chess Magazine 2009
56 The Problemist 2009

SOLUTION


  • SOUND
  • Sets
    • 1...Se5
      • 2.Sd6#
  • Tries
    • 1.Sh3?
      • threat
        • 2.Qf4#
      • 1...Se5
        • 2.Sd6#
      • 1...Bxe3!
    • 1.Sd5?
      • threat
        • 2.Qf4#
      • 1...Se5
        • 2.Sd6#
      • 1...Bxe3!
    • 1.Sh5?
      • threat
        • 2.Qf4#
      • 1...Se5
        • 2.Sd6#
      • 1...Bxe3!
    • 1.Sg6?
      • threat
        • 2.Sd6#
      • 1...Rxb5
        • 2.Qf4#
      • 1...Rd5
        • 2.Qf4#
      • 1...Bb4!
    • 1.Qe5+?
      • 1...Sxe5
        • 2.Sd6#
      • 1...fxe5
        • 2.Sd6#
      • 1...Kxe5!
  • Keys
    • 1.Sxd3!
      • threat
        • 2.Sc5#
      • 1...Kxd3
        • 2.Bxf5#
      • 1...Qxf2
        • 2.Sxf2#
      • 1...Bxe3
        • 2.Sd6#
      • 1...Bb4
        • 2.Qf4#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(e);SBLOCK::S(H)
  • Tries
    • Try
      • S(G);
      • Threat
        • QAR1(M)
      • Vars
        • S(e);SBLOCK::S(H)
      • Refutation
        • B(b);XP(E)
    • Try
      • S(G);
      • Threat
        • QAR1(M)
      • Vars
        • S(e);SBLOCK::S(H)
      • Refutation
        • B(b);XP(E)
    • Try
      • S(G);
      • Threat
        • QAR1(M)
      • Vars
        • S(e);SBLOCK::S(H)
      • Refutation
        • B(b);XP(E)
    • Try
      • S(G);N_PINR(h)
      • Threat
        • S(H)
      • Vars
        • R(h);N_GUARD,P_PINB(I),XS(H)::QAR1(M)
        • R(h);N_GUARD::QAR1(M)
      • Refutation
        • B(b);
    • Try
      • Q(M);CHECK
      • Vars
        • S(e);SBLOCK,XQ(M)::S(H)
        • P(i);SBLOCK,XQ(M)::S(H)
      • Refutation
        • K(f);N_SPINR(h),P-FLIGHT,XQ(M)
  • Actual
    • S(G);XP(d)
    • Threat
      • S(G)
    • Vars
      • K(f);P_SPINB(b),S_FLIGHT,XS(G)::B(L),XR(h)
      • Q(a);XP(B)::S(G),XQ(a)
      • B(b);XP(E)::S(H)
      • B(b);::QAR1(M)


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).