MESON Chess Problem Database

Problem Display
PID: 109253 (4N1n1/B2pP2B/7p/1P1k1NbR/3P1n1R/8/K5PQ/8 w - - 0 1)

Rockwell, Almon Ferdinand

Checkmate, 1902

4N1n1/B2pP2B/7p/1P1k1NbR/3P1n1R/8/K5PQ/8

#2

12 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Se2
      • 2.Bxg8#
    • 1...Sxg2
      • 2.Bxg8#
    • 1...Sd3
      • 2.Bxg8#
    • 1...Sh3
      • 2.Bxg8#
    • 1...Sxh5
      • 2.Bxg8#
    • 1...Se6
      • 2.Se3#
    • 1...Sg6
      • 2.Bxg8#
  • Tries
    • 1.Bxg8+?
      • 1...Se6
        • 2.Se3#
      • 1...Ke4!
  • Keys
    • 1.Qh3!
      • threat
        • 2.Se3#
      • 1...Kc4
        • 2.Qb3#
      • 1...Ke4
        • 2.Se3#
        • 2.Qf3#
      • 1...Ke6
        • 2.Bxg8#
      • 1...Sxg2
        • 2.Bxg8#
        • 2.Qb3#
      • 1...Sxh3
        • 2.Bxg8#
      • 1...Sxh5
        • 2.Bxg8#
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • S(a);N_GUARD::B(K),XS(f)
    • S(a);N_GUARD,XP(B)::B(K),XS(f)
    • S(a);N_GUARD,XR(H)::B(K),XS(f)
    • S(a);SBLOCK::S(G)
  • Tries
    • Try
      • B(K);CHECK,XS(f)
      • Vars
        • S(a);P_SPINS(a)::S(G)
      • Refutation
        • K(b);P_SPINS(a),S_FLIGHT
  • Actual
    • Q(C);
    • Threat
      • S(G)
    • Vars
      • K(b);S_FLIGHT::QAB1(C)
      • K(b);S_FLIGHT::B(K),XS(f)
      • S(a);N_GUARD,XQ(C)::B(K),XS(f)
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).