MESON Chess Problem Database

Problem Display
PID: 233935 (nB6/3P4/1qp1P3/bP1k1BR1/1P2r1PK/n2Pp3/1Q6/5N2 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Skakbladet, 1944

nB6/3P4/1qp1P3/bP1k1BR1/1P2r1PK/n2Pp3/1Q6/5N2

#2

12 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb4
      • 2.Qe5#
    • 1...Rc4
      • 2.Qe5#
    • 1...Rd4
      • 2.Sxe3#
    • 1...Rf4
      • 2.Qe5#
    • 1...Rxg4+
      • 2.Bxg4#
    • 1...Re5
      • 2.Qxe5#
    • 1...Rxe6
      • 2.Be4#
    • 1...Sc4
      • 2.dxe4#
    • 1...Sc7
      • 2.d8Q#
      • 2.d8R#
  • Tries
    • 1.Bg6+?
      • 1...Re5
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...Kxe6!
    • 1.Bh7+?
      • 1...Re5
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...Kxe6!
  • Keys
    • 1.Qc3!
      • threat
        • 2.dxe4#
      • 1...Rxg4+
        • 2.Bxg4#
      • 1...Qxb8
        • 2.Qc5#
      • 1...Rxb4
        • 2.Qe5#
      • 1...Rxe6
        • 2.Be4#
      • 1...Qc7
        • 2.Qc5#
      • 1...Sc7
        • 2.d8Q#
        • 2.d8R#
      • 1...Qd4
        • 2.Qxc6#
      • 1...Rc4
        • 2.Qe5#
      • 1...Rd4
        • 2.Sxe3#
      • 1...Rf4
        • 2.Qe5#
      • 1...Re5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(c);N_GUARD,XP(D)::QAR1(B)
    • R(c);N_GUARD::QAR1(B)
    • R(c);N_GUARD,S_CUTQ(f)::S(A),XP(b)
    • R(c);CHECK,OGATE,XP(E)::R(I)+B(H),XR(c)
    • R(c);N_GUARD,N_PINP(E)::QAR1(B),XR(c)
    • R(c);N_PINP(E),SBLOCK,XP(J)::R(I)+B(H),DCHECK
    • S(a);SBLOCK::P(C),XR(c)
    • S(h);S_CUTQ(f)::P=Q
  • Tries
    • Try
      • B(H);CHECK
      • Refutation
        • K(e);S_FLIGHT,XP(J)
    • Try
      • B(H);CHECK
      • Refutation
        • K(e);S_FLIGHT,XP(J)
  • Actual
    • Q(B);
    • Threat
      • P(C),XR(c)
    • Vars
      • R(c);CHECK,OGATE,XP(E)::R(I)+B(H),XR(c)
      • Q(f);N_GUARD,XB(L)::QAR1(B)
      • R(c);N_GUARD,XP(D)::QAR1(B)
      • R(c);N_PINP(E),SBLOCK,XP(J)::R(I)+B(H),DCHECK
      • Q(f);N_GUARD::QAR1(B)
      • S(h);S_CUTQ(f)::P=Q
      • Q(f);N_GUARD,SBLOCK::QAB1(B),XP(g)
      • R(c);N_GUARD::QAR1(B)
      • R(c);N_GUARD,S_CUTQ(f)::S(A),XP(b)
      • R(c);N_GUARD,N_PINP(E)::QAR1(B),XR(c)
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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).