MESON Chess Problem Database

Problem Display
PID: 31826 (3N4/4pp2/5p2/1n1bk1p1/1Q6/4P2n/1K1N1R2/3R2B1 w - - 0 1)

de Langhe, L

De Problemist, 1927

3N4/4pp2/5p2/1n1bk1p1/1Q6/4P2n/1K1N1R2/3R2B1

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Sc4#
    • 1...Sa3
      • 2.Qb8#
    • 1...Sc3
      • 2.Qb8#
    • 1...Sd4
      • 2.Qb8#
      • 2.exd4#
    • 1...Sd6
      • 2.Qc3#
      • 2.Qd4#
    • 1...Sa7
      • 2.Qb8#
    • 1...e6
      • 2.Sxf7#
  • Tries
    • 1.Sc6+?
      • 1...Ke6
        • 2.Qxe7#
      • 1...Bxc6!
    • 1.Qe4+?
      • 1...Bxe4
        • 2.Sc4#
      • 1...Kd6!
  • Keys
    • 1.e4!
      • threat
        • 2.Rf5#
      • 1...Bxe4
        • 2.Sc4#
      • 1...Sxf2
        • 2.Bh2#
      • 1...f5
        • 2.Rxf5#
      • 1...Be6
        • 2.Sc6#
      • 1...Sf4
        • 2.Sf3#
      • 1...Sd4
        • 2.Qb8#
      • 1...Sd6
        • 2.Qc3#
      • 1...e6
        • 2.Sxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • B(c);N_GUARD,SBLOCK::S(D)
    • S(b);OGATE::QAB(G)
    • P(g);SBLOCK,S_CUTB(c)::S(H),XP(h)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR1(G),XP(g)
      • Refutation
        • B(c);XS(H)
    • Try
      • Q(G);CHECK
      • Vars
        • B(c);SBLOCK,XQ(G)::S(D)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • P(F);
    • Threat
      • R1(E)
    • Vars
      • B(c);N_GUARD,SBLOCK,XP(F)::S(D)
      • S(a);N_GUARD,XR(E)::B(B)
      • P(f);::R1(E),XP(f)
      • B(c);N_GUARD,SBLOCK::S(H)
      • S(a);SBLOCK::S(D)
      • S(b);OGATE,SBLOCK::QAB(G)
      • S(b);N_GUARD,SBLOCK::QAB(G)
      • P(g);SBLOCK,S_CUTB(c)::S(H),XP(h)
HTML5 logo

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).