MESON Chess Problem Database

Problem Display
PID: 218462 (2r5/N2b4/8/3p4/pP1k1p2/2R4Q/5K1B/N4B2 w - - 0 1)

Nix, John Gilbert

Philadelphia Times, 1882

2r5/N2b4/8/3p4/pP1k1p2/2R4Q/5K1B/N4B2

#2

8 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qh8+?
      • 1...Ke4
        • 2.Bd3#
      • 1...Rxh8!
  • Keys
    • 1.Re3!
      • 1...Rc2+
        • 2.Sxc2#
      • 1...fxe3+
        • 2.Qxe3#
      • 1...Bxh3
        • 2.Sb5#
      • 1...Rc1
        • 2.Qh8#
      • 1...Rc3
        • 2.Qh8#
      • 1...Rc4
        • 2.Qh8#
      • 1...Rc5
        • 2.Qh8#
      • 1...Rc6
        • 2.Sb5#
      • 1...Rc7
        • 2.Qh8#
      • 1...Ra8
        • 2.Sc2#
      • 1...Rb8
        • 2.Sc2#
      • 1...Rd8
        • 2.Sc2#
      • 1...Re8
        • 2.Sc2#
      • 1...Rf8
        • 2.Sc2#
      • 1...Rg8
        • 2.Sc2#
      • 1...Rh8
        • 2.Sc2#
        • 2.Qxh8#
      • 1...Bg4
        • 2.Sb5#
      • 1...Bb5
        • 2.Sxb5#
      • 1...Bf5
        • 2.Sb5#
      • 1...Bc6
        • 2.Sc2#
      • 1...Be6
        • 2.Sb5#
      • 1...Be8
        • 2.Qh8#
      • 1...a3
        • 2.Sb3#
      • 1...f3
        • 2.Be5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 23
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);P-FLIGHT::B(B)
      • Refutation
        • R(f);XQ(F)
  • Actual
    • R(E);
    • Vars
      • R(f);CHECK,N_GUARD::S(A),XR(f)
      • P(c);CHECK,OGATE,XR(E)::QAB1(F),XP(c)
      • B(e);N_GUARD,XQ(F)::S(H)
      • R(f);N_GUARD::QAB(F)
      • R(f);S_CUTB(e)::S(H)
      • R(f);N_GUARD::S(A)
      • B(e);N_GUARD::S(H)
      • B(e);N_GUARD::S(H),XB(e)
      • B(e);S_CUTR(f)::S(A)
      • B(e);S_CUTR(f)::QAB(F)
      • P(a);N_GUARD::S(A)
      • P(c);OGATE::B(D)
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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).