MESON Chess Problem Database

Problem Display
PID: 233946 (1bN1Qqb1/5n2/r6p/rn1kpPpN/2p1R1K1/Ppp2P2/4P3/5BB1 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Skakbladet, 1949

1bN1Qqb1/5n2/r6p/rn1kpPpN/2p1R1K1/Ppp2P2/4P3/5BB1

#2

11 + 14

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Re6
      • 2.Qxe6#
    • 1...Rf6
      • 2.Sxf6#
    • 1...Ra7
      • 2.Sf6#
      • 2.Qe6#
    • 1...Ra8
      • 2.Sf6#
      • 2.Qe6#
    • 1...Bd6
      • 2.Sf6#
    • 1...Sbd6
      • 2.Sf6#
    • 1...Sfd6
      • 2.Rxe5#
  • Tries
    • 1.Sb6+?
      • 1...Kd6
        • 2.Qd7#
      • 1...Rxb6!
    • 1.Rxe5+?
      • 1...Bxe5
        • 2.e4#
      • 1...Sxe5+!
    • 1.Qd7+?
      • 1...Qd6
        • 2.Sf6#
        • 2.Se7#
      • 1...Rd6
        • 2.Sf6#
        • 2.Sb6#
      • 1...Bd6
        • 2.Sf6#
      • 1...Sbd6
        • 2.Sf6#
      • 1...Sfd6!
  • Keys
    • 1.Rxc4!
      • threat
        • 2.e4#
      • 1...Kxc4
        • 2.e4#
      • 1...Sbd6
        • 2.Qe6#
      • 1...Sfd6
        • 2.Rc5#
      • 1...e4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(i);N_GUARD::QAB1(K),XR(i)
    • R(i);N_GUARD::S(I),XR(i)
    • B(l);S_CUTR(i)::S(I)
    • S(e);S_CUTR(i)::S(I)
    • S(k);N_GUARD,S_CUTB(l)::R1(F),XP(g)
  • Tries
    • Try
      • S(J);CHECK
      • Vars
        • K(f);P-FLIGHT::QAR1(K)
      • Refutation
        • R(i);XS(J)
    • Try
      • R(F);CHECK,XP(g)
      • Vars
        • B(l);XR(F)::P(C)
      • Refutation
        • S(k);CHECK,XR(F)
    • Try
      • Q(K);CHECK
      • Vars
        • B(l);P_SPINB(l)::S(I)
        • S(e);P_SPINS(e)::S(I)
      • Refutation
        • S(k);P_SPINS(k)
  • Actual
    • R(F);XP(c)
    • Threat
      • P(C)
    • Vars
      • K(f);S_FLIGHT,XR(F)::B(A)+P(C)
      • S(e);S_CUTR(i)::QAB1(K)
      • S(k);S_CUTQ(m)::R1(F)
      • P(g);OGATE::QAB1(K),XP(g)
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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).