MESON Chess Problem Database

Problem Display
PID: 135540 (8/8/R4Pp1/3P1kr1/4N2p/1p2KN1p/1rP1Q2P/B7 w - - 0 1)

Navon, Emanuel

StrateGems, 2009

8/8/R4Pp1/3P1kr1/4N2p/1p2KN1p/1rP1Q2P/B7

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kg4
      • 2.Sd4#
    • 1...Rb1
      • 2.Sxh4#
    • 1...Ra2
      • 2.Sxh4#
    • 1...Rxc2
      • 2.Sxh4#
  • Tries
    • 1.Sd6+?
      • 1...Kg4
        • 2.Se1#
        • 2.Sg1#
        • 2.Sd2#
        • 2.Sd4#
        • 2.Se5#
      • 1...Kxf6!
    • 1.Re6?
      • threat
        • 2.Sd4#
        • 2.Sxh4#
      • 1...Kg4
        • 2.Sd4#
      • 1...Rg4
        • 2.Sd4#
        • 2.Sd6#
        • 2.Re5#
      • 1...Rh5
        • 2.Sd4#
      • 1...Rg3!
    • 1.Qd3?
      • threat
        • 2.Sf2#
      • 1...Rg4
        • 2.Sg3#
      • 1...Kg4!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qc8#
      • 1...Kg4
        • 2.Sg3#
      • 1...Rxc2
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • K(e);S_FLIGHT::QAB(C)+S(F)
    • R(a);::S(F),XP(d)
    • R(a);XP(B)::S(F),XP(d)
  • Tries
    • Try
      • S(G);CHECK
      • Refutation
        • K(e);P-FLIGHT,P_SPINR(a),XP(J)
    • Try
      • R(I);
      • Threat
        • DUALS(2)
      • Vars
        • K(e);S_FLIGHT::QAB(C)+S(F)
        • R(f);::S(F)
      • Refutation
        • R(f);P_PINS(F)
    • Try
      • Q(C);
      • Threat
        • QAB(C)+S(G)
      • Vars
        • R(f);SBLOCK::QAB(C)+S(G),DCHECK
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAB(C)
    • Vars
      • K(e);S_FLIGHT::QAR(C)+S(G)
      • R(a);XP(B)::S(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).