MESON Chess Problem Database

Problem Display
PID: 250203 (5b2/8/p1r5/qnp5/1nN1kpQp/1N6/p3P3/3R3K w - - 0 1)

Feldbrugge, Johannes Hermanus Bernardus

De Maasbode, 1927

5b2/8/p1r5/qnp5/1nN1kpQp/1N6/p3P3/3R3K

#2

6 + 11

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Sxc5#
    • 1...Re6
      • 2.Qxe6#
    • 1...Rg6
      • 2.Qxg6#
    • 1...Rc7
      • 2.Qe6#
      • 2.Qg6#
    • 1...Rc8
      • 2.Qe6#
      • 2.Qg6#
    • 1...Bd6
      • 2.Qg6#
    • 1...Sd6
      • 2.Qe6#
  • Tries
    • 1.Qg2+?
      • 1...f3
        • 2.Qxf3#
        • 2.Qg4#
      • 1...Kf5!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Sbd2#
      • 1...Re6
        • 2.Qxe6#
      • 1...f3
        • 2.Qg4#
      • 1...Rd6
        • 2.Sxc5#
      • 1...Bd6
        • 2.Qh7#
      • 1...Sc2
        • 2.Qd3#
        • 2.Qd5#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sd6
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(j);N_GUARD,S_CUTB(k)::S(D),XP(h)
    • R(j);N_GUARD::QAR2(F),XR(j)
    • R(j);N_GUARD::QAB(F),XR(j)
    • B(k);S_CUTR(j)::QAB(F)
    • S(g);S_CUTR(j)::QAR2(F)
  • Tries
    • Try
      • Q(F);CHECK,N_PINP(d)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(F);N_PINP(d)
    • Threat
      • S(D)
    • Vars
      • R(j);N_GUARD::QAR2(F),XR(j)
      • P(d);OGATEB::QAR2(F)
      • R(j);N_GUARD,S_CUTB(k)::S(D),XP(h)
      • B(k);S_CUTR(j)::QAB(F)
      • S(b);N_GUARD::QAB1(F),XS(b)
      • S(g);S_CUTR(j)::QAR2(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).