MESON Chess Problem Database

Problem Display
PID: 190050 (1bQ5/3pR3/KPp2N2/2k1p3/2pr4/2P2B2/8/8 w - - 0 1)

Oosterholt, Cornelis Johannes

Vereenigde Katholieke Pers, 1913

1bQ5/3pR3/KPp2N2/2k1p3/2pr4/2P2B2/8/8

#2

7 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Se4#
    • 1...Bd6
      • 2.Sxd7#
    • 1...d6
      • 2.Sd7#
      • 2.Qxc6#
  • Tries
    • 1.Se4+?
      • 1...Kd5
        • 2.Qg8#
      • 1...Rxe4!
    • 1.Sxd7+?
      • 1...Rxd7
        • 2.Qxc6#
      • 1...Kd6!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Rxe5#
      • 1...Kd6
        • 2.Re8#
      • 1...Rd5
        • 2.Se4#
      • 1...Bd6
        • 2.Sxd7#
      • 1...e4
        • 2.Re5#
      • 1...d5
        • 2.Rc7#
      • 1...d6
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(b);N_GUARD,SBLOCK::S(E)
    • B(g);SBLOCK,S_CUTR(b)::S(E),XP(f)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(c);N_SPINP(e),P-FLIGHT::QAB(G)
      • Refutation
        • R(b);XS(E)
    • Try
      • S(E);CHECK,XP(f)
      • Vars
        • R(b);XS(E)::QAR1(G),XP(e)
      • Refutation
        • K(c);N_SPINP(e),S_FLIGHT
  • Actual
    • Q(G);N_PINP(e)
    • Threat
      • QAB(G)+R(F),DCHECK,XP(d)
    • Vars
      • K(c);S_FLIGHT::QAB(G)+R(F)
      • R(b);N_GUARD,SBLOCK::S(E)
      • B(g);SBLOCK,S_CUTR(b)::S(E),XP(f)
      • P(d);::QAB(G)+R(F),DCHECK
      • P(f);OGATE::QAB(G)+R(F)
      • P(f);SBLOCK,S_CUTR(b)::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).