MESON Chess Problem Database

Problem Display
PID: 120812 (R3n1Bb/K4P1q/bP2k2r/1P2r2P/2P3P1/B7/5Q2/4R3 w - - 0 1)

Pulcherio, Cauby

Caissa, 1980

R3n1Bb/K4P1q/bP2k2r/1P2r2P/2P3P1/B7/5Q2/4R3

#2

12 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd7
      • 2.f8S#
    • 1...Qb1
      • 2.fxe8Q#
      • 2.fxe8B#
      • 2.f8S#
    • 1...Qc2
      • 2.fxe8Q#
      • 2.fxe8B#
      • 2.f8S#
    • 1...Qd3
      • 2.fxe8Q#
      • 2.fxe8B#
      • 2.f8S#
    • 1...Qe4
      • 2.fxe8Q#
      • 2.fxe8B#
      • 2.f8S#
    • 1...Qf5
      • 2.Qxf5#
    • 1...Qg6
      • 2.fxe8Q#
      • 2.f8S#
    • 1...Qxg8
      • 2.Qf5#
    • 1...Qxf7+
      • 2.Qxf7#
    • 1...Qg7
      • 2.Qf5#
    • 1...Rg6
      • 2.Qf5#
    • 1...Bb7
      • 2.fxe8Q#
      • 2.f8S#
    • 1...Bg7
      • 2.fxe8Q#
      • 2.f8S#
    • 1...Sc7
      • 2.f8S#
    • 1...Sg7
      • 2.f8S#
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qe7#
      • 1...Kf6
        • 2.Qxe5#
      • 1...Kd7
        • 2.f8S#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Bf6
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • K(c);N_PINP(J),N_SPINR(a),S_FLIGHT::P=S
    • Q(e);N_GUARD,N_PINP(J)::QAB1(B),XQ(e)
    • Q(e);N_GUARD,N_PINP(J),XB(L)::QAB1(B)
    • Q(e);CHECK,OGATE,P_SPINQ(e),XP(J)::QAB1(B),XQ(e)
    • Q(e);N_GUARD::QAB1(B)
    • R(d);S_CUTQ(e)::QAB1(B)
    • S(f);N_PINP(J)::P=S
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • K(c);N_SPINR(a),P-FLIGHT::QAB1(B),XR(a)
      • K(c);N_PINP(J),N_SPINR(a),S_FLIGHT::P=S
      • S(f);N_GUARD::QAR1(B),XS(f)
      • B(g);SBLOCK::QAB1(B)
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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).