MESON Chess Problem Database

Problem Display
PID: 5955 (B1NR4/8/K3p3/2k1P1r1/ppp2p1b/1r2R3/1qp1n3/6B1 w - - 0 1)

Larsen, Karl Adolf Koefoed

7th HM., 64 Shakhmatnoe obozrenie, 1926

B1NR4/8/K3p3/2k1P1r1/ppp2p1b/1r2R3/1qp1n3/6B1

#2

7 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe5
      • 2.Rxe5#
    • 1...Rxe5
      • 2.Rxe5#
    • 1...Sc3
      • 2.Rg3#
    • 1...Sg3
      • 2.Rc3#
    • 1...c3
      • 2.Rxc3#
  • Keys
    • 1.Sd6!
      • threat
        • 2.Se4#
      • 1...Kd4
        • 2.Sb7#
      • 1...Qxe5
        • 2.Rxe5#
      • 1...Rxe5
        • 2.Rxe5#
      • 1...Qd4
        • 2.Rc8#
      • 1...Sc3
        • 2.Rg3#
      • 1...Sg3
        • 2.Rc3#
      • 1...c3
        • 2.Rxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(a);OGATE,XP(C)::B(A)+R(B),DCHECK,XQ(a)
    • R(k);OGATE,XP(C)::B(A)+R(B),DCHECK,XR(k)
    • S(c);N_GUARD,S_CUTQ(a),S_CUTR(d)::B(A)+R(B)
    • S(c);N_GUARD,S_CUTB(i),S_CUTR(k)::B(A)+R(B)
    • P(g);::B(A)+R(B),DCHECK,XP(g)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(j);S_FLIGHT::R(G)+S(F)
      • Q(a);OGATE,XP(C)::B(A)+R(B),DCHECK,XQ(a)
      • R(k);OGATE,XP(C)::B(A)+R(B),DCHECK,XR(k)
      • Q(a);SBLOCK::R(G)
      • S(c);N_GUARD,S_CUTQ(a),S_CUTR(d)::B(A)+R(B)
      • S(c);N_GUARD,S_CUTB(i),S_CUTR(k)::B(A)+R(B)
      • P(g);::B(A)+R(B),DCHECK,XP(g)
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).