MESON Chess Problem Database

Problem Display
PID: 11537 (4B1N1/1p2ppr1/Rnq1kbrR/1p6/2P1N1P1/2p5/b6B/2K3Q1 w - - 0 1)

Walters, S

Chess, 1939

4B1N1/1p2ppr1/Rnq1kbrR/1p6/2P1N1P1/2p5/b6B/2K3Q1

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qd7
      • 2.Sc5#
    • 1...Qxe8
      • 2.Sc5#
    • 1...Qc5
      • 2.Sxc5#
    • 1...Bd4
      • 2.Sg5#
    • 1...Bg5+
      • 2.Sxg5#
    • 1...Sd5
      • 2.Sc5#
    • 1...Sa8
      • 2.Sc5#
    • 1...Sc8
      • 2.Sc5#
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qf5#
      • 1...Bg5+
        • 2.Sxg5#
      • 1...Qxe4
        • 2.Qc8#
      • 1...Qxc5
        • 2.Sxc5#
      • 1...Rxg4
        • 2.Qe5#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Rg5
        • 2.Qxe7#
      • 1...Be5
        • 2.Sg5#
        • 2.Qxe7#
        • 2.Qxe5#
      • 1...Sd5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • Q(e);N_GUARD,P_SPINS(d)::S(E)
    • Q(e);N_GUARD,P_SPINS(d),XB(I)::S(E)
    • Q(e);N_GUARD,P_SPINS(d)::S(E),XQ(e)
    • B(g);N_GUARD,P_SPINR(h)::S(E)
    • B(g);CHECK,N_GUARD,P_SPINR(h)::S(E),XB(g)
    • S(d);P_SPINQ(e)::S(E)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • B(g);CHECK,N_GUARD,P_SPINR(h)::S(E),XB(g)
      • Q(e);OGATE,P_SPINS(d),XS(E)::QAB(B)
      • Q(e);P_SPINS(d),XQ(B)::S(E),XQ(e)
      • R(h);P_SPINB(g),XP(F)::QAR1(B)
      • Q(e);N_GUARD,P_SPINS(d)::QAB1(B),XQ(e)
      • R(h);P_SPINB(g)::QAR1(B),XP(j)
      • S(d);N_GUARD,P_SPINQ(e)::QAB1(B),XS(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).