MESON Chess Problem Database

Problem Display
PID: 202562 (8/1rN5/2p3p1/2p5/1pkN4/1bqR4/r1n3QK/2R2B2 w - - 0 1)

Dalton, William Robert Inge

Brisbane Courier, 1923

8/1rN5/2p3p1/2p5/1pkN4/1bqR4/r1n3QK/2R2B2

#2

7 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Rd2#
    • 1...Sa3
      • 2.Rd2#
    • 1...Sxd4
      • 2.Rdxc3#
    • 1...cxd4
      • 2.Qxc6#
  • Tries
    • 1.Re3+?
      • 1...Kxd4
        • 2.Re4#
        • 2.Qe4#
      • 1...Qd3!
  • Keys
    • 1.Qe4!
      • threat
        • 2.Qe6#
      • 1...Qd2+
        • 2.Se2#
      • 1...Sa1+
        • 2.Se2#
        • 2.Rd2#
      • 1...Se1+
        • 2.Se2#
      • 1...Sa3+
        • 2.Se2#
        • 2.Rd2#
      • 1...Se3+
        • 2.Se2#
      • 1...Sxd4+
        • 2.Rd2#
      • 1...Qxd4
        • 2.Re3#
        • 2.Rf3#
        • 2.Rg3#
        • 2.Rh3#
      • 1...Qxd3
        • 2.Sdb5#
        • 2.Qxd3#
      • 1...cxd4
        • 2.Qxc6#
      • 1...Qe1
        • 2.Se2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(b);P_PINQ(C),P_SPINQ(d)::B(B)+R(E)
    • S(b);P_PINQ(C),P_SPINQ(d),SBLOCK,XS(F)::B(B)+R(E),DCHECK,XQ(d)
    • P(g);OGATEB,XS(F)::QAR2(C),XP(h)
  • Tries
    • Try
      • R(E);CHECK
      • Refutation
        • Q(d);P_SPINQ(d),P_SPINS(b)
  • Actual
    • Q(C);
    • Threat
      • QAB(C)
    • Vars
      • Q(d);CHECK,N_GUARD,P_SPINS(b)::QAR(C)+S(F)
      • S(b);CHECK,N_GUARD,P_SPINQ(d)::QAR(C)+S(F)
      • S(b);CHECK,P_SPINQ(d),P_SPINS(b),XS(F)::B(B)+R(E)
      • P(g);OGATEB,P_SPINP(g),XS(F)::QAR2(C),XP(h)
      • Q(d);N_GUARD,P_SPINS(b)::QAR(C)+S(F)
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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).