MESON Chess Problem Database

Problem Display
PID: 6239 (R7/1Nk1pqNR/K2n1p2/P2n4/Qb6/8/7B/4r3 w - - 0 1)

Nietvelt, Gustaaf Josephus

2nd Place, Chess Amateur (The) (Valve Ty.), 1928

R7/1Nk1pqNR/K2n1p2/P2n4/Qb6/8/7B/4r3

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.Se8#
    • 1...Qe8
      • 2.Sxe8#
    • 1...Sb6
      • 2.axb6#
    • 1...e5
      • 2.Se6#
    • 1...e6
      • 2.Se8#
  • Tries
    • 1.Sc5?
      • threat
        • 2.Qd7#
      • 1...Qe6
        • 2.Se8#
      • 1...Qe8
        • 2.Sxe8#
      • 1...Sb6
        • 2.axb6#
      • 1...e5
        • 2.Sge6#
      • 1...e6
        • 2.Se8#
      • 1...Bxc5!
    • 1.Sd8?
      • threat
        • 2.Qc6#
      • 1...Qe8
        • 2.Sxe8#
      • 1...Rc1!
  • Keys
    • 1.Rd8!
      • threat
        • 2.Qd7#
      • 1...Qe6
        • 2.Se8#
      • 1...Qe8
        • 2.Sxe8#
      • 1...Sb6
        • 2.axb6#
      • 1...e5
        • 2.Se6#
      • 1...e6
        • 2.Se8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • Q(h);N_GUARD::S(F)
    • Q(h);N_GUARD::S(F),XQ(h)
    • S(c);OGATE::P(C),XS(c)
    • P(g);N_SPINS(d),S_CUTQ(h),S_CUTR(a)::S(F)
    • P(g);S_CUTQ(h)::S(F)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAR1(B)
      • Vars
        • Q(h);N_GUARD::S(F)
        • Q(h);N_GUARD::S(F),XQ(h)
        • S(c);OGATE::P(C),XS(c)
        • P(g);N_SPINS(d),S_CUTQ(h),S_CUTR(a)::S(F)
        • P(g);S_CUTQ(h)::S(F)
      • Refutation
        • B(b);XS(E)
    • Try
      • S(E);
      • Threat
        • QAR1(B)
      • Vars
        • Q(h);N_GUARD::S(F),XQ(h)
      • Refutation
        • R(a);
  • Actual
    • R(H);
    • Threat
      • QAR1(B)
    • Vars
      • Q(h);N_GUARD::S(F)
      • Q(h);N_GUARD::S(F),XQ(h)
      • S(c);OGATE::P(C),XS(c)
      • P(g);N_SPINS(d),S_CUTQ(h),S_CUTR(a)::S(F)
      • P(g);S_CUTQ(h)::S(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).