MESON Chess Problem Database

Problem Display
PID: 107685 (8/8/p7/B7/2p2p2/2pk1B2/5P2/RnQ1K3 w Q - 0 1)

Barclay, William A

Los Angeles Times, 1966

8/8/p7/B7/2p2p2/2pk1B2/5P2/RnQ1K3

#2

6 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Qxc3#
    • 1...Sa3
      • 2.Qd1#
      • 2.Qxc3#
  • Tries
    • 1.Bxc3?
      • 1...Sxc3
        • 2.Qd2#
      • 1...Sd2
        • 2.Qxd2#
      • 1...Sa3
        • 2.Qd2#
      • 1...a5!
    • 1.Rxb1?
      • threat
        • 2.Qd1#
        • 2.Qxc3#
      • 1...c2
        • 2.Qd2#
      • 1...Kd4!
    • 1.Ra3?
      • 1...Sxa3
        • 2.Qd1#
        • 2.Qxc3#
      • 1...Sd2
        • 2.Qxd2#
        • 2.Qxc3#
      • 1...Kd4!
  • Keys
    • 1.Qa3!
      • 1...Kc2
        • 2.Be4#
      • 1...Kd4
        • 2.Qd6#
      • 1...Sxa3
        • 2.0-0-0#
      • 1...Sd2
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR1(B),XP(b)
  • Tries
    • Try
      • B(F);XP(b)
      • Vars
        • S(a);N_GUARD,XB(F)::QAR1(B)
        • S(a);N_GUARD::QAR1(B),XS(a)
        • S(a);N_GUARD::QAR1(B)
      • Refutation
        • P(f);
    • Try
      • R(A);XS(a)
      • Threat
        • DUALS(2)
      • Vars
        • P(b);N_GUARD::QAR1(B)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • R(A);P_PINP(b)
      • Refutation
        • K(c);N_SPINP(b),P-FLIGHT
  • Actual
    • Q(B);P_PINP(b)
    • Vars
      • K(c);N_SPINP(b),S_FLIGHT::B(E)
      • K(c);N_SPINP(b),P-FLIGHT::QAR2(B)
      • S(a);N_SPINP(b),XQ(B)::0-0-0
      • S(a);N_GUARD::QAR1(B),XP(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).