MESON Chess Problem Database

Problem Display
PID: 214896 (1K2R3/1B1p2N1/3k1np1/3b2pP/R2B3p/1n6/1N6/3Q4 w - - 0 1)

Robbins, Alexander Henry

St. Louis Globe Democrat, 1878

1K2R3/1B1p2N1/3k1np1/3b2pP/R2B3p/1n6/1N6/3Q4

#2

9 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bh1
      • 2.Sc4#
    • 1...Bg2
      • 2.Sc4#
    • 1...Bf3
      • 2.Sc4#
    • 1...Bc4
      • 2.Sxc4#
    • 1...Be4
      • 2.Sc4#
    • 1...Be6
      • 2.Ra6#
    • 1...Bf7
      • 2.Ra6#
    • 1...Bg8
      • 2.Ra6#
    • 1...Sc5
      • 2.Be5#
    • 1...gxh5
      • 2.Sf5#
  • Tries
    • 1.Bc5+?
      • 1...Sxc5
        • 2.Sc4#
      • 1...Kxc5!
  • Keys
    • 1.Qf3!
      • 1...Bxf3
        • 2.Sc4#
      • 1...Bxb7
        • 2.Sc4#
      • 1...Sxd4
        • 2.Qa3#
      • 1...Sxh5
        • 2.Qxd5#
        • 2.Qf8#
      • 1...Sxe8
        • 2.Qf8#
      • 1...gxh5
        • 2.Sf5#
      • 1...Sd2
        • 2.Qa3#
      • 1...Bc4
        • 2.Sxc4#
      • 1...Be4
        • 2.Sc4#
        • 2.Qxf6#
      • 1...Bc6
        • 2.Sc4#
      • 1...Be6
        • 2.Ra6#
      • 1...Bf7
        • 2.Ra6#
      • 1...Bg8
        • 2.Ra6#
      • 1...Sa1
        • 2.Qa3#
      • 1...Sc1
        • 2.Qa3#
      • 1...Sa5
        • 2.Qa3#
      • 1...Sc5
        • 2.Be5#
      • 1...Se4
        • 2.Qf8#
      • 1...Sg4
        • 2.Qxd5#
        • 2.Qf8#
      • 1...Sh7
        • 2.Qxd5#
      • 1...Sg8
        • 2.Qxd5#
      • 1...h3
        • 2.Qg3#
      • 1...g4
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 3
  • Sets
    • B(c);N_GUARD::S(B)
    • B(c);N_GUARD::S(B),XB(c)
    • B(c);N_GUARD::R(C)
    • S(a);SBLOCK::B(D)
    • P(g);N_GUARD,XP(E)::S(G)
  • Tries
    • Try
      • B(D);CHECK,P_PINB(c)
      • Vars
        • S(a);SBLOCK,XB(D)::S(B)
      • Refutation
        • K(e);N_SPINB(c),S_FLIGHT,XB(D)
  • Actual
    • Q(A);
    • Vars
      • B(c);N_GUARD,XQ(A)::S(B)
      • B(c);N_GUARD,XB(F)::S(B)
      • S(a);OGATE,XB(D)::QAB(A)
      • S(f);OGATE,XR(I)::QAB(A)
      • P(g);N_GUARD,XP(E)::S(G)
      • S(a);OGATE::QAB(A)
      • B(c);N_GUARD::S(B),XB(c)
      • B(c);N_GUARD::S(B)
      • B(c);N_GUARD::R(C)
      • S(a);SBLOCK::B(D)
      • S(f);OGATE::QAB(A)
      • S(f);N_GUARD::QAR1(A),XB(c)
      • P(b);N_GUARD::QAB(A)
      • P(d);N_GUARD::QAB(A)
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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).