MESON Chess Problem Database

Problem Display
PID: 220677 (1bk1B3/4BK2/1R1p2p1/1Nqp4/p4p2/r7/1QR5/8 w - - 0 1)

Nielsen, Karl Christian

British Chess Magazine, 1926

1bk1B3/4BK2/1R1p2p1/1Nqp4/p4p2/r7/1QR5/8

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qc7
      • 2.Sxd6#
    • 1...Bc7
      • 2.Sa7#
  • Tries
    • 1.Sxd6+?
      • 1...Kc7
        • 2.Rxc5#
        • 2.Rb7#
      • 1...Bxd6!
    • 1.Sa7+?
      • 1...Kc7
        • 2.Rb7#
      • 1...Bxa7!
    • 1.Rxc5+?
      • 1...Bc7
        • 2.Sxd6#
        • 2.Sa7#
        • 2.Rxc7#
      • 1...dxc5!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Bc6#
      • 1...Qc3
        • 2.Qh3#
      • 1...Qc6
        • 2.Bxc6#
      • 1...Qc7
        • 2.Sxd6#
      • 1...Rh3
        • 2.Qxh3#
      • 1...Bc7
        • 2.Sa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(d);P_PINB(E),S_CUTB(h)::S(C),XP(f)
    • B(h);N_GUARD,N_SPINQ(d),SBLOCK::S(C)
  • Tries
    • Try
      • S(C);CHECK,XP(f)
      • Refutation
        • B(h);XS(C)
    • Try
      • S(C);CHECK
      • Vars
        • K(i);P-FLIGHT::R1(D)
      • Refutation
        • B(h);XS(C)
    • Try
      • R(B);CHECK,XQ(d)
      • Refutation
        • P(f);XR(B)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)+B(G)
    • Vars
      • Q(d);S_CUTR(a)::QAB(A)
      • Q(d);::QAR(A)+B(G),XQ(d)
      • Q(d);P_PINB(E),S_CUTB(h)::S(C),XP(f)
      • R(a);N_GUARD::QAB(A),XR(a)
      • B(h);N_GUARD,N_SPINQ(d),SBLOCK::S(C)
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).