MESON Chess Problem Database

Problem Display
PID: 277012 (b7/Q3n3/3pP3/4b2K/3N1kpn/3PN3/4PB1P/8 w - - 0 1)

Groeneveld, Cornelis

To Mat, 1954

b7/Q3n3/3pP3/4b2K/3N1kpn/3PN3/4PB1P/8

#2

9 + 7

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Sg2#
    • 1...Sc6
      • 2.Sd5#
    • 1...g3
      • 2.hxg3#
  • Tries
    • 1.Sg2+?
      • 1...Bxg2
        • 2.e3#
      • 1...Sxg2!
    • 1.Sd5+?
      • 1...Bxd5
        • 2.e3#
      • 1...Sxd5!
    • 1.Qxe7?
      • threat
        • 2.Qg5#
      • 1...Sf3
        • 2.Sg2#
      • 1...Bf6!
    • 1.Qxa8?
      • threat
        • 2.Qe4#
      • 1...Sd5
        • 2.Sxd5#
      • 1...Sc6
        • 2.Sd5#
      • 1...d5!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Bg3#
      • 1...Shf5
        • 2.Sg2#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Sef5
        • 2.Sd5#
      • 1...g3
        • 2.Bxg3#
        • 2.hxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(c);N_GUARD,S_CUTB(g)::S(E)
    • S(f);N_GUARD,S_CUTB(g)::S(E)
    • P(b);OGATE::P(C),XP(b)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • B(g);XS(E)::P(A)
      • Refutation
        • S(c);XS(E)
    • Try
      • S(E);CHECK
      • Vars
        • B(g);XS(E)::P(A)
      • Refutation
        • S(f);XS(E)
    • Try
      • Q(I);XS(f)
      • Threat
        • QAB1(I)
      • Vars
        • S(c);N_GUARD,S_CUTB(g)::S(E)
      • Refutation
        • B(d);
    • Try
      • Q(I);XB(g)
      • Threat
        • QAR1(I)
      • Vars
        • S(f);N_GUARD::S(E),XS(f)
        • S(f);N_GUARD::S(E)
      • Refutation
        • P(e);
  • Actual
    • S(F);
    • Threat
      • B(B)
    • Vars
      • S(c);N_GUARD,SBLOCK::S(E)
      • B(d);N_GUARD::QAR2(I),XB(d)
      • S(f);N_GUARD,SBLOCK::S(E)
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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).