MESON Chess Problem Database

Problem Display
PID: 9922 (8/1Qp4r/2pN1Rn1/p1k1b1R1/3N1rp1/5b1q/BK2p1p1/6B1 w - - 0 1)

Larsen, Karl Adolf Koefoed

2nd Place, Skakbladet, 1960

8/1Qp4r/2pN1Rn1/p1k1b1R1/3N1rp1/5b1q/BK2p1p1/6B1

#2

8 + 13

SOLUTION

  • SOUND
  • Tries
    • 1.Se4+?
      • 1...Rxe4
        • 2.Rxc6#
      • 1...Bxe4!
    • 1.Rxe5+?
      • 1...Bd5
        • 2.Sb3#
      • 1...Sxe5!
    • 1.Qxc6+?
      • 1...Kb4
        • 2.Qb5#
        • 2.Qc4#
      • 1...Bxc6!
  • Keys
    • 1.Ka3!
      • threat
        • 2.Qa7#
      • 1...Be4+
        • 2.Sf3#
      • 1...Bd5+
        • 2.Sb3#
      • 1...Rxf6
        • 2.S4b5#
      • 1...cxd6
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • R(e);XS(F)::R1(G),XP(j)
      • Refutation
        • B(c);XS(F)
    • Try
      • R(E);CHECK,N_SPINS(D),XB(i)
      • Vars
        • B(c);P_SPINB(c)::B(A)+S(D),DCHECK
      • Refutation
        • S(k);XR(E)
    • Try
      • Q(H);CHECK,XP(j)
      • Refutation
        • B(c);XQ(H)
  • Actual
    • K(C);N_SPINS(D),S_FLIGHT
    • Threat
      • QAB(H)
    • Vars
      • B(c);CHECK,S_CUTR(e)::B(A)+S(D)
      • B(c);CHECK,N_SPINB(i),SBLOCK::B(A)+S(D),DCHECK
      • R(e);N_GUARD,XR(G)::B(A)+S(D)
      • P(l);SBLOCK,XS(F)::B(A)+S(D),DCHECK
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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).