MESON Chess Problem Database

Problem Display
PID: 202396 (5KB1/2P5/8/p2N4/4NQR1/3kPb1R/1Pp1rr2/2n2n2 w - - 0 1)

Sparke, Arthur M

4th HM., Il Secolo, 1923

5KB1/2P5/8/p2N4/4NQR1/3kPb1R/1Pp1rr2/2n2n2

#2

10 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Sc5#
    • 1...a4
      • 2.Sb4#
  • Tries
    • 1.c8Q?
      • threat
        • 2.Qa6#
        • 2.Qc3#
      • 1...Bxe4
        • 2.Qc3#
      • 1...Sxe3
        • 2.Qc3#
      • 1...Re1
        • 2.Qa6#
      • 1...Rd2
        • 2.Qa6#
      • 1...Sa2
        • 2.Qa6#
      • 1...Sd2
        • 2.Sc5#
        • 2.Qc3#
      • 1...Rxe3!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qa6#
      • 1...Bh1+
        • 2.Sdf6#
      • 1...Bg2+
        • 2.Sdf6#
      • 1...Bxe4+
        • 2.Sf4#
      • 1...Bxg4+
        • 2.Sdf6#
      • 1...Kc4
        • 2.Sdc3#
      • 1...Rxe3
        • 2.Sdc3#
      • 1...Sxe3
        • 2.Sb4#
      • 1...Sd2
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • S(b);SBLOCK::S(D)
    • P(h);N_GUARD::S(G)
  • Tries
    • Try
      • P(H);
      • Threat
        • DUALS(2)
      • Vars
        • B(g);P_PINQ(E),XS(D)::QAR1(H)
        • S(b);XP(B)::QAR1(H)
        • R(d);::QAB(H)
        • S(a);::QAB(H)
      • Refutation
        • R(d);XP(B)
  • Actual
    • Q(E);
    • Threat
      • QAB(E)
    • Vars
      • B(g);CHECK::QAR(E)+S(G)
      • B(g);CHECK,SBLOCK,XS(D)::QAR(E)+S(G),DCHECK
      • B(g);CHECK,XR(F)::QAR(E)+S(G)
      • K(f);S_FLIGHT::B(J)+S(G)
      • R(d);SBLOCK,XP(B)::QAR(E)+S(G)
      • S(b);SBLOCK,XP(B)::QAR(E)+S(G),DCHECK
      • S(b);SBLOCK::S(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).