MESON Chess Problem Database

Problem Display
PID: 214386 (8/K1pN2N1/p1r1r1p1/8/2PkbR1Q/1Pp1n1P1/2P2B2/q7 w - - 0 1)

Stevenson, Edward

The Problemist, 1987

8/K1pN2N1/p1r1r1p1/8/2PkbR1Q/1Pp1n1P1/2P2B2/q7

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Sxe6#
    • 1...Rd6
      • 2.Rxe4#
    • 1...Rf6
      • 2.Rxe4#
    • 1...g5
      • 2.Sf5#
  • Tries
    • 1.Qg5?
      • threat
        • 2.Qd5#
      • 1...Rxc4
        • 2.Sxe6#
      • 1...Rc5
        • 2.Sxe6#
        • 2.Qxc5#
      • 1...Rcd6
        • 2.Qc5#
      • 1...Re5
        • 2.Qxe5#
      • 1...Red6
        • 2.Qe5#
      • 1...Qa5!
    • 1.Qf6+?
      • 1...Re5
        • 2.Qxe5#
      • 1...Rxf6!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qd5#
      • 1...Rxc4
        • 2.Sxe6#
      • 1...gxh5
        • 2.Sf5#
      • 1...Qa5
        • 2.Qd1#
      • 1...Rc5
        • 2.Sxe6#
        • 2.Qxc5#
      • 1...Rcd6
        • 2.Qc5#
      • 1...Re5
        • 2.Qxe5#
      • 1...Red6
        • 2.Qe5#
      • 1...g5
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • R(g);N_GUARD::S(J),XR(h)
    • R(h);N_GUARD::R1(F),XB(e)
    • P(i);N_GUARD::S(J)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • R(g);N_GUARD,XP(E)::S(J),XR(h)
        • R(g);N_GUARD::QAB1(G)
        • R(h);N_GUARD::QAB1(G),XR(h)
        • R(h);N_GUARD::QAB1(G)
      • Refutation
        • Q(a);
    • Try
      • Q(G);CHECK
      • Vars
        • R(h);N_GUARD,P_SPINR(h)::QAB1(G),XR(h)
      • Refutation
        • R(h);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAR1(G)
    • Vars
      • R(g);N_GUARD,XP(E)::S(J),XR(h)
      • P(i);N_GUARD,XQ(G)::S(J)
      • Q(a);N_GUARD::QAR(G)
      • R(g);N_GUARD::QAB1(G)
      • R(h);N_GUARD::QAB1(G),XR(h)
      • R(h);N_GUARD::QAB1(G)
      • P(i);N_GUARD::S(J)
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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).