MESON Chess Problem Database

Problem Display
PID: 140576 (Q7/6p1/3p2P1/2prk1bK/2p1B1p1/2np2P1/3N1R2/4R1B1 w - - 0 1)

Markwick, Frederick W

Knowledge, 1883

Q7/6p1/3p2P1/2prk1bK/2p1B1p1/2np2P1/3N1R2/4R1B1

#2

9 + 10

56 The Problemist 1943

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Qxd5#
    • 1...Sd1
      • 2.Qxd5#
    • 1...Sa2
      • 2.Qxd5#
    • 1...Se2
      • 2.Qxd5#
    • 1...Sa4
      • 2.Qxd5#
    • 1...Sxe4
      • 2.Rxe4#
    • 1...Sb5
      • 2.Qxd5#
  • Tries
    • 1.Bh1+?
      • 1...Kd4
        • 2.Rf4#
      • 1...Se2
        • 2.Qxd5#
      • 1...Se4
        • 2.Rxe4#
      • 1...Be3!
    • 1.Bg2+?
      • 1...Kd4
        • 2.Rf4#
      • 1...Se2
        • 2.Qxd5#
      • 1...Se4
        • 2.Rxe4#
      • 1...Be3!
    • 1.Qe8+?
      • 1...Kd4
        • 2.Rf4#
      • 1...Be7!
  • Keys
    • 1.Kxg5!
      • 1...Kd4+
        • 2.Rf5#
      • 1...Ke6+
        • 2.Bf5#
      • 1...Sxe4+
        • 2.Rxe4#
      • 1...Rd4
        • 2.Qe8#
      • 1...Sb1
        • 2.Qxd5#
      • 1...Sd1
        • 2.Qxd5#
      • 1...Sa2
        • 2.Qxd5#
      • 1...Se2
        • 2.Qxd5#
      • 1...Sa4
        • 2.Qxd5#
      • 1...Sb5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR1(I),XR(f)
    • S(a);OGATE,P_SPINS(a),XB(F)::R1(A),XS(a)
  • Tries
    • Try
      • B(F);CHECK
      • Vars
        • K(g);S_FLIGHT::B(B)+R(D),DCHECK
        • S(a);P_SPINS(a)::QAR1(I),XR(f)
        • S(a);N_GUARD,P_SPINS(a)::R1(A),XS(a)
      • Refutation
        • B(h);P_SPINB(h)
    • Try
      • B(F);CHECK
      • Vars
        • K(g);S_FLIGHT::B(B)+R(D),DCHECK
        • S(a);P_SPINS(a)::QAR1(I),XR(f)
        • S(a);N_GUARD,P_SPINS(a)::R1(A),XS(a)
      • Refutation
        • B(h);P_SPINB(h)
    • Try
      • Q(I);CHECK
      • Vars
        • K(g);S_FLIGHT::B(B)+R(D)
      • Refutation
        • B(h);P_SPINB(h)
  • Actual
    • K(G);P-FLIGHT,XB(h)
    • Vars
      • K(g);CHECK,S_FLIGHT::B(B)+R(D)
      • K(g);CHECK,P-FLIGHT::R(A)+B(F),DCHECK
      • S(a);CHECK,OGATE,P_SPINS(a),XB(F)::R1(A),XS(a)
      • R(f);SBLOCK::QAR(I)
      • S(a);N_GUARD::QAR1(I),XR(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).