MESON Chess Problem Database

Problem Display
PID: 210203 (1B6/K1R1p2r/3N4/RB2kP1P/4b3/2P2pP1/2nQ4/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

The Problemist, 1985

1B6/K1R1p2r/3N4/RB2kP1P/4b3/2P2pP1/2nQ4/8

#2

11 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Qd4#
    • 1...Se1
      • 2.Qd4#
    • 1...Sa3
      • 2.Qd4#
    • 1...Se3
      • 2.Qd4#
    • 1...Sb4
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
  • Tries
    • 1.Bc4+?
      • 1...Kf6
        • 2.Se8#
      • 1...Bd5!
    • 1.Qf4+?
      • 1...Kd5
        • 2.Bf1#
        • 2.Be2#
        • 2.Bd3#
        • 2.Ba4#
        • 2.Bc4#
        • 2.Ba6#
        • 2.Bc6#
        • 2.Bd7#
        • 2.Be8#
      • 1...Kf6!
  • Keys
    • 1.Se8!
      • threat
        • 2.Rc5#
      • 1...Kxf5
        • 2.Bd7#
      • 1...Bxf5
        • 2.Rxe7#
      • 1...Bd3
        • 2.Bxd3#
      • 1...Bd5
        • 2.Qf4#
      • 1...Bc6
        • 2.Bxc6#
      • 1...Bb7
        • 2.Bc6#
      • 1...Ba8
        • 2.Bc6#
      • 1...e6
        • 2.Rf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 6
  • Sets
    • S(a);N_GUARD::QAB1(A)
    • S(a);N_GUARD::QAB1(A),XS(a)
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • K(d);S_FLIGHT::S(H)
      • Refutation
        • B(c);P_SPINB(c)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • S(H);
    • Threat
      • B(K)+R(J),DCHECK
    • Vars
      • K(d);P-FLIGHT,XP(F)::R(D)+B(E),DCHECK
      • B(c);SBLOCK,XP(F)::B(K)+R(J),DCHECK,XP(e)
      • B(c);N_GUARD::R(D)+B(E),XB(c)
      • B(c);SBLOCK::QAB1(A)
      • B(c);N_GUARD::R(D)+B(E)
      • P(e);OGATE,P_PINR(J)::B(K)+R(J)
HTML5 logo

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).