MESON Chess Problem Database

Problem Display
PID: 167059 (2B3K1/7p/1PQ3P1/rp1NPP1r/1Rb1kN1n/2B1Pp1P/q1pP1n2/8 w - - 0 1)

Wirajaya, Daniel

Comm., StrateGems, 2016

2B3K1/7p/1PQ3P1/rp1NPP1r/1Rb1kN1n/2B1Pp1P/q1pP1n2/8

#2

14 + 11

145 StrateGems 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.d3#
    • 1...Sh1
      • 2.d3#
    • 1...Sxh3
      • 2.d3#
    • 1...Sg4
      • 2.d3#
  • Tries
    • 1.Kg7?
      • threat
        • 2.Sf6#
        • 2.Sc7#
        • 2.Se7#
      • 1...Ra7+
        • 2.Sc7#
        • 2.Se7#
      • 1...Sxf5+!
    • 1.Kf8?
      • threat
        • 2.Sf6#
        • 2.Sc7#
        • 2.Se7#
      • 1...Rxf5+
        • 2.Sf6#
      • 1...Sxg6+!
    • 1.Rxc4+?
      • 1...bxc4
        • 2.Sf6#
      • 1...Qxc4!
    • 1.Qxc4+?
      • 1...bxc4
        • 2.Sf6#
      • 1...Qxc4!
    • 1.Qe6?
      • threat
        • 2.Sf6#
      • 1...Sg4
        • 2.d3#
      • 1...Rxf5!
    • 1.e6?
      • threat
        • 2.Se7#
      • 1...Rxf5
        • 2.Sf6#
      • 1...Kxf5!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sc5#
      • 1...Kd3
        • 2.Sdf4#
      • 1...Kxf5
        • 2.Se7#
      • 1...Sd3
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(c);N_GUARD::P(A)
    • S(c);N_GUARD,XP(D)::P(A)
  • Tries
    • Try
      • K(N);N_SPINS(G),P-FLIGHT
      • Threat
        • DUALS(3)
      • Refutation
        • S(g);CHECK,XP(I)
    • Try
      • K(N);N_SPINS(G),P-FLIGHT
      • Threat
        • DUALS(3)
      • Vars
        • R(j);CHECK,XP(I)::QAB(K)+S(G),DCHECK
      • Refutation
        • S(g);CHECK,XP(L)
    • Try
      • R(E);CHECK,N_SPINS(G),XB(e)
      • Vars
        • P(i);XR(E)::QAB(K)+S(G),DCHECK
      • Refutation
        • Q(a);P_PINS(G),XR(E)
    • Try
      • Q(K);CHECK,N_SPINS(G),XB(e)
      • Vars
        • P(i);P_SPINP(i),XQ(K)::S(G)
      • Refutation
        • Q(a);P_PINS(G),P_SPINQ(a),XQ(K)
    • Try
      • Q(K);N_SPINS(G)
      • Threat
        • S(G)
      • Vars
        • S(c);N_GUARD::P(A)
      • Refutation
        • R(j);XP(I)
    • Try
      • P(H);N_SPINS(G)
      • Threat
        • QAB(K)+S(G)
      • Vars
        • R(j);SBLOCK,XP(I)::QAB(K)+S(G),DCHECK
      • Refutation
        • K(f);N_SPINB(e),S_FLIGHT,XP(I)
  • Actual
    • S(F);N_SPINS(G)
    • Threat
      • S(F)
    • Vars
      • K(f);N_SPINB(e),S_FLIGHT::S(G)
      • K(f);N_SPINB(e),S_FLIGHT,XP(I)::S(G)
      • S(c);SBLOCK::QAB(K)+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).