MESON Chess Problem Database

Problem Display
PID: 208892 (4N3/8/2p5/2P1b3/3k4/1R1PN3/5R2/KB1Q4 w - - 0 1)

Wormald, Robert Bownas

Chicago Tribune, 1876

4N3/8/2p5/2P1b3/3k4/1R1PN3/5R2/KB1Q4

#2

9 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qh5?
      • 1...Kxc5+
        • 2.Qxe5#
      • 1...Bh2
        • 2.Sc2#
      • 1...Bg3
        • 2.Sc2#
      • 1...Bf4
        • 2.Sc2#
      • 1...Bd6
        • 2.Sc2#
      • 1...Bf6
        • 2.Sc2#
      • 1...Bc7
        • 2.Sc2#
      • 1...Bg7
        • 2.Sc2#
      • 1...Bb8
        • 2.Sc2#
      • 1...Bh8
        • 2.Sc2#
      • 1...Kxe3+!
  • Keys
    • 1.Rf5!
      • 1...Kxe3+
        • 2.d4#
      • 1...Kxc5+
        • 2.d4#
      • 1...Bh2
        • 2.Sc2#
      • 1...Bg3
        • 2.Sc2#
      • 1...Bf4
        • 2.Sc2#
      • 1...Bd6
        • 2.Sc2#
      • 1...Bf6
        • 2.Sc2#
      • 1...Bc7
        • 2.Sc2#
      • 1...Bg7
        • 2.Sc2#
      • 1...Bb8
        • 2.Sc2#
      • 1...Bh8
        • 2.Sc2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Vars
        • K(a);CHECK,P_SPINB(b),S_FLIGHT,XP(H)::QAR2(C),XB(b)
        • B(b);::S(G)
      • Refutation
        • K(a);CHECK,S_FLIGHT,XS(G)
  • Actual
    • R(D);
    • Vars
      • K(a);CHECK,OGATE,S_FLIGHT,XS(G)::R(E)+P(F)
      • K(a);CHECK,OGATE,P_SPINB(b),S_FLIGHT,XP(H)::P(F)
      • B(b);::S(G)
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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).