MESON Chess Problem Database

Problem Display
PID: 23949 (2rrNq2/4P2b/1N3b2/1BpPn2R/2p1k1p1/4P3/3P4/5Q1K w - - 0 1)

Shire, David J

2nd Prize, Problem Observer, 1997

2rrNq2/4P2b/1N3b2/1BpPn2R/2p1k1p1/4P3/3P4/5Q1K

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qg8
      • 2.Sxf6#
    • 1...Rd6
      • 2.Sxd6#
    • 1...Bf5
      • 2.Qxf5#
    • 1...Bg8
      • 2.Qf5#
    • 1...Sd3
      • 2.Qg2#
    • 1...Sf3
      • 2.Qb1#
    • 1...Sg6
      • 2.Qf5#
    • 1...Sd7
      • 2.Sd6#
    • 1...Sf7
      • 2.Sxf6#
    • 1...c3
      • 2.Qf4#
  • Tries
    • 1.Rxe5+?
      • 1...Kxe5
        • 2.Qf4#
      • 1...Bxe5!
    • 1.Qxc4+?
      • 1...Kf3
        • 2.Qf4#
      • 1...Sxc4!
  • Keys
    • 1.Sa4!
      • threat
        • 2.Sc3#
      • 1...Kxd5
        • 2.Qxc4#
      • 1...Sd3
        • 2.Qg2#
      • 1...Sf3
        • 2.Qb1#
      • 1...Sc6
        • 2.Sxc5#
      • 1...Sg6
        • 2.Qf5#
      • 1...Sd7
        • 2.Sd6#
      • 1...Sf7
        • 2.Sxf6#
      • 1...c3
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(j);N_GUARD::S(J),XB(f)
    • R(i);N_GUARD::S(J),XR(i)
    • B(g);N_GUARD::QAB1(A),XB(g)
    • B(g);N_GUARD::QAB1(A)
    • S(e);N_GUARD,SBLOCK::QAB(A)
    • S(e);S_CUTB(g)::QAB1(A)
    • S(e);S_CUTR(i)::S(J)
    • S(e);S_CUTQ(j)::S(J),XB(f)
    • P(a);::QAR1(A)
  • Tries
    • Try
      • R(G);CHECK,XS(e)
      • Vars
        • K(b);P-FLIGHT,XR(G)::QAB1(A)
      • Refutation
        • B(f);XR(G)
    • Try
      • Q(A);CHECK,XP(a)
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • S(e);XQ(A)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • K(b);P_SPINS(e),S_FLIGHT,XP(F)::QAB1(A),XP(a)
      • S(e);N_GUARD,SBLOCK::QAB(A)
      • S(e);S_CUTR(h)::S(H),XP(d)
      • S(e);S_CUTB(g)::QAB1(A)
      • S(e);S_CUTR(i)::S(J)
      • S(e);S_CUTQ(j)::S(J),XB(f)
      • P(a);::S(H),XP(a)
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).