MESON Chess Problem Database

Problem Display
PID: 273372 (8/8/B1pp4/P2p1K2/3k4/r2P4/p7/N1Q5 w - - 0 1)

Seidemann, Felix

British Chess Magazine, 1934

8/8/B1pp4/P2p1K2/3k4/r2P4/p7/N1Q5

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rb3
      • 2.Sxb3#
    • 1...Rc3
      • 2.Qg1#
    • 1...Ra4
      • 2.Sb3#
    • 1...Rxa5
      • 2.Sb3#
  • Tries
    • 1.Sc2+?
      • 1...Kc5
        • 2.Qxa3#
        • 2.d4#
      • 1...Kc3!
    • 1.Qb2+?
      • 1...Kc5
        • 2.Qb6#
        • 2.d4#
      • 1...Rc3
        • 2.Qf2#
      • 1...Ke3!
  • Keys
    • 1.Qd2!
      • 1...Kc5
        • 2.d4#
      • 1...Rxd3
        • 2.Sb3#
      • 1...Rxa5
        • 2.Sb3#
      • 1...c5
        • 2.Sc2#
      • 1...Rb3
        • 2.Sxb3#
      • 1...Rc3
        • 2.Qf2#
      • 1...Ra4
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(b);N_GUARD::S(A),XR(b)
    • R(b);SBLOCK::QAB(B)
    • R(b);N_GUARD::S(A)
    • R(b);N_GUARD,XP(D)::S(A)
  • Tries
    • Try
      • S(A);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • R(b);P_SPINR(b),SBLOCK::QAB(B)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(c);OGATE,S_FLIGHT::P(C)
      • R(b);N_GUARD,P_SPINR(b),XP(C)::S(A)
      • R(b);N_GUARD,XP(D)::S(A)
      • P(e);SBLOCK::S(A)
      • R(b);N_GUARD::S(A),XR(b)
      • R(b);SBLOCK::QAB(B)
      • R(b);N_GUARD::S(A)
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).