MESON Chess Problem Database

Problem Display
PID: 223409 (6K1/B3p3/1N1PP3/Rp2kp1P/1P1N2nP/4pP1B/4P3/6Q1 w - - 0 1)

Otten, Henry

New York Tid-Bits, 1886

6K1/B3p3/1N1PP3/Rp2kp1P/1P1N2nP/4pP1B/4P3/6Q1

#2

14 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qa1#
    • 1...Kxd6
      • 2.Bb8#
    • 1...Kf6
      • 2.Sd7#
  • Tries
    • 1.Qxe3+?
      • 1...Kxd6
        • 2.Bb8#
      • 1...Kf6
        • 2.Sd5#
        • 2.Sd7#
      • 1...Sxe3!
  • Keys
    • 1.Rxb5+!
      • 1...Kxd4
        • 2.Qa1#
      • 1...Kf4
        • 2.Rxf5#
      • 1...Kxd6
        • 2.Bb8#
      • 1...Kf6
        • 2.Sd7#
        • 2.Rxf5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(d);N_SPINP(c),OGATEB,P_SPINP(a),S_FLIGHT,XS(F)::QAB(A)
    • K(d);N_SPINP(c),OGATEB,S_FLIGHT,XP(K)::B(M)
    • K(d);N_SPINP(c),S_FLIGHT::S(J)
  • Tries
    • Try
      • Q(A);CHECK,XP(a)
      • Vars
        • K(d);N_SPINP(c),S_FLIGHT,XP(K)::B(M)
      • Refutation
        • S(b);XQ(A)
  • Actual
    • R(H);CHECK,XP(c)
    • Vars
      • K(d);P_SPINP(a),S_FLIGHT,XS(F)::QAB(A)
      • K(d);OGATE,S_FLIGHT::R1(H),XP(e)
      • K(d);S_FLIGHT,XP(K)::B(M)
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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).