MESON Chess Problem Database

Problem Display
PID: 275793 (1B1N4/8/NK1p1r2/Qp2k1P1/2P1Pp2/5P2/2nP4/1q1R4 w - - 0 1)

Petite, Efren

Phenix, 2001

1B1N4/8/NK1p1r2/Qp2k1P1/2P1Pp2/5P2/2nP4/1q1R4

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qc3#
    • 1...Re6
      • 2.Sc6#
    • 1...Sa1
      • 2.Qc3#
      • 2.d4#
    • 1...Se1
      • 2.Qc3#
      • 2.d4#
    • 1...Sa3
      • 2.Qc3#
      • 2.d4#
    • 1...Se3
      • 2.Qc3#
      • 2.d4#
    • 1...Sb4
      • 2.d4#
  • Tries
    • 1.Sc7?
      • threat
        • 2.Sc6#
      • 1...d5+
        • 2.Sce6#
      • 1...Kd4
        • 2.Qc3#
      • 1...Sb4
        • 2.d4#
      • 1...Sd4!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Sc6#
      • 1...bxc4+
        • 2.Sb3#
      • 1...Kd4
        • 2.Qc3#
      • 1...Sb4
        • 2.d4#
      • 1...Sd4
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(e);N_SPINP(d),S_CUTS(b),S_FLIGHT::QAB1(F)
    • R(g);SBLOCK::S(K)
    • S(b);N_GUARD::P(B)
  • Tries
    • Try
      • S(H);
      • Threat
        • S(K)
      • Vars
        • P(f);CHECK,N_SPINP(d)::B(J)+S(H)
        • K(e);N_SPINP(d),S_CUTS(b),S_FLIGHT::QAB1(F)
        • S(b);N_GUARD::P(B)
      • Refutation
        • S(b);
  • Actual
    • S(H);N_PINP(d),P_PINP(f)
    • Threat
      • S(K)
    • Vars
      • P(d);CHECK,XP(D)::QAR(F)+S(H)
      • K(e);N_SPINP(f),S_CUTS(b),S_FLIGHT::QAB1(F)
      • S(b);N_GUARD::P(B)
      • S(b);SBLOCK::S(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).