MESON Chess Problem Database

Problem Display
PID: 146177 (6n1/KQ1p2r1/4P1p1/1R1B1k2/6NR/4PN1n/4Pp2/8 w - - 0 1)

Lacambra, J

SEPA, 1940

6n1/KQ1p2r1/4P1p1/1R1B1k2/6NR/4PN1n/4Pp2/8

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.e4#
    • 1...Sg5
      • 2.Sd4#
    • 1...Sf6
      • 2.Sh6#
    • 1...dxe6
      • 2.Be4#
  • Tries
    • 1.Rb6?
      • threat
        • 2.Be4#
      • 1...Sg5
        • 2.Sd4#
      • 1...Sf6
        • 2.Sh6#
      • 1...d6!
    • 1.Qc7?
      • threat
        • 2.Qe5#
        • 2.Qc2#
        • 2.e4#
      • 1...dxe6
        • 2.e4#
      • 1...g5
        • 2.Qc2#
      • 1...Sf4
        • 2.Qxf4#
        • 2.Qe5#
        • 2.e4#
      • 1...Sg5
        • 2.Sd4#
        • 2.Qf4#
        • 2.Qe5#
      • 1...Sf6
        • 2.Sh6#
        • 2.Qe5#
      • 1...d6!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Qc2#
      • 1...dxe6+
        • 2.Bb7#
      • 1...d6+
        • 2.e7#
      • 1...Sf4
        • 2.e4#
      • 1...Sg5
        • 2.Sd4#
      • 1...Sf6
        • 2.Sh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(b);SBLOCK::P(B)
    • S(b);SBLOCK::S(C)
    • S(g);N_GUARD,SBLOCK::S(D)
    • P(e);P_PINQ(J),SBLOCK,XP(H)::R(F)+B(G),DCHECK
  • Tries
    • Try
      • R(F);
      • Threat
        • B(G)
      • Vars
        • S(b);SBLOCK::S(C)
        • S(g);N_GUARD,SBLOCK::S(D)
      • Refutation
        • P(e);P_PINQ(J)
    • Try
      • Q(J);
      • Threat
        • DUALS(3)
      • Vars
        • P(e);P_PINQ(J),XP(H)::P(B)
        • P(d);::QAB(J)
      • Refutation
        • P(e);P_PINQ(J)
  • Actual
    • Q(J);
    • Threat
      • QAB(J)
    • Vars
      • P(e);CHECK,N_GUARD,P_SPINP(e),XP(H)::R(F)+B(G)
      • P(e);CHECK::QAB(J)+P(H)
      • S(b);SBLOCK::P(B)
      • S(b);SBLOCK::S(C)
      • S(g);N_GUARD,SBLOCK::S(D)
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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).