MESON Chess Problem Database

Problem Display
PID: 175275 (8/5Bp1/5p2/2pK1k2/3bp1p1/2p1B3/2N2P2/5Q2 w - - 0 1)

Coppens, JP

Der Tijd, 1926

8/5Bp1/5p2/2pK1k2/3bp1p1/2p1B3/2N2P2/5Q2

#2

6 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...g3
      • 2.Qh3#
    • 1...c4
      • 2.Sxd4#
    • 1...g6
      • 2.Be6#
  • Tries
    • 1.f3?
      • threat
        • 2.fxe4#
      • 1...exf3
        • 2.Qd3#
      • 1...gxf3
        • 2.Qh3#
      • 1...g3
        • 2.Qh3#
      • 1...Bxe3!
  • Keys
    • 1.f4!
      • 1...Bxe3
        • 2.Sxe3#
      • 1...exf4 ep
        • 2.Qd3#
      • 1...gxf4 ep
        • 2.Qh3#
      • 1...g3
        • 2.Qh3#
      • 1...Be5
        • 2.fxe5#
      • 1...c4
        • 2.Sxd4#
      • 1...g5
        • 2.fxg5#
      • 1...g6
        • 2.Be6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(d);OGATEB::QAB(A)
    • P(e);N_GUARD::S(B),XB(b)
    • P(h);SBLOCK::B(F)
  • Tries
    • Try
      • P(C);
      • Threat
        • QAR(A)+P(C)DCHECK,XP(c)
      • Vars
        • P(c);OGATEB,P_SPINP(c),XP(C)::QAB(A)
        • P(d);OGATEB,P_SPINP(d),XP(C)::QAB(A)
        • P(d);OGATEB::QAB(A)
      • Refutation
        • B(b);XB(D)
  • Actual
    • P(C);
    • Vars
      • B(b);XB(D)::S(B),XB(b)
      • P(c);EP,OGATEB,P_SPINP(c),XP(C)::QAB(A)
      • P(d);EP,OGATEB,P_SPINP(d),XP(C)::QAB(A)
      • P(d);OGATEB::QAB(A)
      • B(b);OGATE::QAR(A)+P(C),XB(b)
      • P(e);N_GUARD::S(B),XB(b)
      • P(h);OGATE::QAR(A)+P(C),XP(h)
      • P(h);SBLOCK::B(F)
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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).