MESON Chess Problem Database

Problem Display
PID: 219053 (3r4/b7/3RK3/3B4/N3p2R/3k4/bQ1Pp3/1r1n4 w - - 0 1)

Henry, TW

St. Louis Globe Democrat, 1882

3r4/b7/3RK3/3B4/N3p2R/3k4/bQ1Pp3/1r1n4

#2

7 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bc5
      • 2.Sxc5#
    • 1...Bb8
      • 2.Sc5#
    • 1...Sf2
      • 2.Qc3#
    • 1...Sc3
      • 2.Qxc3#
    • 1...Se3
      • 2.Qc3#
    • 1...e3
      • 2.Bc4#
  • Tries
    • 1.Bxa2+?
      • 1...Bd4
        • 2.Sc5#
      • 1...Rxd6+!
    • 1.Bb3+?
      • 1...Bd4
        • 2.Sc5#
        • 2.Qxd4#
        • 2.Qc2#
      • 1...Rxd6+!
    • 1.Rh3+?
      • 1...Be3
        • 2.Sc5#
      • 1...Se3
        • 2.Qc3#
      • 1...e3!
    • 1.Qc2+?
      • 1...Kd4
        • 2.Rxe4#
        • 2.Qxe4#
      • 1...Kxc2!
  • Keys
    • 1.Bc4+!
      • 1...Kxc4
        • 2.d3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • B(g);N_GUARD::S(C),XB(g)
    • B(g);N_GUARD::S(C)
    • S(b);N_GUARD::QAR1(A)
    • S(b);N_GUARD::QAR1(A),XS(b)
    • P(f);::R(F)+B(E),DCHECK
  • Tries
    • Try
      • B(E);CHECK,N_SPINB(E),XB(c)
      • Vars
        • B(g);P_SPINB(g)::S(C)
      • Refutation
        • R(h);CHECK,XR(F)
    • Try
      • B(E);CHECK
      • Refutation
        • R(h);CHECK,XR(F)
    • Try
      • R(D);CHECK
      • Vars
        • B(g);P_SPINB(g)::S(C)
        • S(b);P_SPINS(b)::QAR1(A)
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(e);S_FLIGHT,XQ(A)
  • Actual
    • B(E);CHECK
    • Vars
      • K(e);P_SPINP(f),S_FLIGHT,XB(E)::P(B)
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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).