MESON Chess Problem Database

Problem Display
PID: 185882 (2BK4/B6p/n1PN4/3kP3/5Pp1/3N3r/1pR1p1Rp/1q5Q w - - 0 1)

Petite, Efren

Chess, 1957

2BK4/B6p/n1PN4/3kP3/5Pp1/3N3r/1pR1p1Rp/1q5Q

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Rg3#
    • 1...Qxc2
      • 2.Rg3#
    • 1...Rh4
      • 2.Rg1#
    • 1...Rh5
      • 2.Rg1#
    • 1...Rh6
      • 2.Rg1#
    • 1...Sb4
      • 2.Sxb4#
    • 1...Sc7
      • 2.Sb4#
    • 1...Sb8
      • 2.Sb4#
    • 1...e1B
      • 2.Rg3#
  • Tries
    • 1.Ke7?
      • threat
        • 2.Be6#
      • 1...Qxc2
        • 2.Rg3#
      • 1...Rh6
        • 2.Rg1#
      • 1...Sc7
        • 2.Sb4#
      • 1...Sc5!
    • 1.Rxg4+?
      • 1...Rf3
        • 2.Qxf3#
      • 1...Qxh1!
  • Keys
    • 1.Rd2!
      • threat
        • 2.Sb4#
      • 1...Kxc6
        • 2.Bb7#
      • 1...Qxd3
        • 2.Rg3#
      • 1...Rxd3
        • 2.Rg1#
      • 1...Sb4
        • 2.Sxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(a);N_GUARD::QAB(A)+R(C)
    • Q(a);N_GUARD,XR(B)::QAB(A)+R(C)
    • R(e);N_GUARD::QAB(A)+R(C)
    • S(h);N_GUARD::S(D),XS(h)
    • S(h);N_GUARD::S(D)
    • P(c);S_CUTQ(a)::QAB(A)+R(C)
  • Tries
    • Try
      • K(K);S_FLIGHT
      • Threat
        • B(J)
      • Vars
        • Q(a);N_GUARD,XR(B)::QAB(A)+R(C)
        • R(e);N_GUARD::QAB(A)+R(C)
        • S(h);N_GUARD::S(D)
      • Refutation
        • S(h);
    • Try
      • R(C);CHECK,XP(f)
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::QAB(A),XR(e)
      • Refutation
        • Q(a);XQ(A)
  • Actual
    • R(B);
    • Threat
      • R(B)+S(D),DCHECK
    • Vars
      • K(g);OGATEB,S_FLIGHT,XP(G)::B(J)
      • Q(a);N_GUARD,P_SPINQ(a),XS(D)::QAB(A)+R(C)
      • R(e);N_GUARD,P_SPINR(e),XS(D)::QAB(A)+R(C)
      • S(h);::R(B)+S(D),DCHECK,XS(h)
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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).