MESON Chess Problem Database

Problem Display
PID: 156305 (4R2K/8/r2Q1p2/1b2p1pp/n1p1NkP1/2p2P1R/r1P5/3N4 w - - 0 1)

Ersek, Tibor

Best Problems, 2006

4R2K/8/r2Q1p2/1b2p1pp/n1p1NkP1/2p2P1R/r1P5/3N4

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Qxf6#
    • 1...Ra7
      • 2.Qxf6#
    • 1...Ra8
      • 2.Qxf6#
    • 1...Bc6
      • 2.Qxf6#
    • 1...Sb6
      • 2.Qxf6#
    • 1...f5
      • 2.Qxe5#
  • Tries
    • 1.Sexc3?
      • threat
        • 2.Se2#
        • 2.Sd5#
        • 2.Qd2#
      • 1...Rxc2
        • 2.Sd5#
      • 1...Rxd6
        • 2.Se2#
      • 1...Sxc3
        • 2.Qd2#
      • 1...Bc6
        • 2.Se2#
        • 2.Qd2#
        • 2.Qxf6#
      • 1...Sb6
        • 2.Se2#
        • 2.Qd2#
        • 2.Qxf6#
      • 1...hxg4!
  • Keys
    • 1.Sxf6!
      • threat
        • 2.Sd5#
        • 2.Sxh5#
        • 2.Qxe5#
      • 1...Rxd6
        • 2.Sxh5#
      • 1...Bxe8
        • 2.Sd5#
      • 1...hxg4
        • 2.Qxe5#
      • 1...Bc6
        • 2.Sxh5#
        • 2.Qxe5#
      • 1...Sb6
        • 2.Sxh5#
        • 2.Qxe5#
      • 1...h4
        • 2.Sd5#
        • 2.Sh5#
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • R(j);N_GUARD::QAR2(G),XP(k)
    • R(j);N_GUARD,P_PINR(H)::QAR2(G),XP(k)
    • B(f);S_CUTR(j)::QAR2(G),XP(k)
    • S(c);S_CUTR(j)::QAR2(G),XP(k)
    • P(k);N_GUARD::QAB1(G),XP(g)
  • Tries
    • Try
      • S(E);XP(b)
      • Threat
        • DUALS(3)
      • Vars
        • R(a);XP(B)::S(E)
        • R(j);N_SPINP(g),XQ(G)::S(E)
        • S(c);XS(E)::QAB(G)
      • Refutation
        • P(i);XP(F)
  • Actual
    • S(E);XP(k)
    • Threat
      • DUALS(3)
    • Vars
      • R(j);N_SPINP(g),XQ(G)::S(E),XP(i)
      • B(f);XR(H)::S(E)
      • P(i);XP(F)::QAB1(G),XP(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).