MESON Chess Problem Database

Problem Display
PID: 109687 (1B3N2/1pRb3r/1pq2pp1/1rP1kpRp/4p3/1Nn5/6B1/5Q1K w - - 0 1)

White, Alain Campbell

Checkmate, 1901

1B3N2/1pRb3r/1pq2pp1/1rP1kpRp/4p3/1Nn5/6B1/5Q1K

#2

9 + 13

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc5
      • 2.Rxc5#
    • 1...e3
      • 2.Rxc6#
  • Tries
    • 1.Rxd7+?
      • 1...Qc7
        • 2.Bxc7#
      • 1...Qd6!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Rxc6#
      • 1...Kf4
        • 2.Qg3#
      • 1...Qxc5
        • 2.Rxc5#
      • 1...Qxc7
        • 2.Bxc7#
      • 1...Qd6
        • 2.Qxd6#
      • 1...Qd5
        • 2.Qg3#
      • 1...Qe6
        • 2.Sxg6#
      • 1...Be6
        • 2.Sxg6#
      • 1...Bc8
        • 2.Re7#
      • 1...Be8
        • 2.Re7#
      • 1...Sd5
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • Q(h);OGATE,XP(E)::B(H)+R(G),DCHECK,XQ(h)
    • P(b);P_PINB(C)::B(H)+R(G),XQ(h)
  • Tries
    • Try
      • R(G);CHECK,XB(l)
      • Vars
        • Q(h);N_GUARD,P_SPINQ(h)::B(H),XQ(h)
      • Refutation
        • Q(h);P_SPINQ(h)
  • Actual
    • Q(A);
    • Threat
      • B(H)+R(G),XQ(h)
    • Vars
      • K(d);N_SPINP(e),S_FLIGHT::QAB1(A)
      • Q(h);OGATE,XP(E)::B(H)+R(G),DCHECK,XQ(h)
      • Q(h);OGATE,P_SPINQ(h),XR(G)::B(H),XQ(h)
      • Q(h);N_GUARD::QAB1(A),XQ(h)
      • Q(h);SBLOCK::QAB(A)
      • Q(h);SBLOCK::S(I),XP(j)
      • B(l);SBLOCK::S(I),XP(j)
      • B(l);OGATE::B(H)+R(G),DCHECK
      • S(a);N_GUARD,S_CUTQ(h)::QAR1(A),XP(b)
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).