MESON Chess Problem Database

Problem Display
PID: 200094 (3brn2/p4B2/r7/p4kpP/6N1/2NP1KBP/2p1pRPq/4R3 w - - 0 1)

Fillery, William Edmund Frank

The Problemist, 1982

3brn2/p4B2/r7/p4kpP/6N1/2NP1KBP/2p1pRPq/4R3

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg3+
      • 2.Kxg3#
    • 1...Qxg2+
      • 2.Kxg2#
    • 1...Re3+
      • 2.Kxe3#
    • 1...Re4
      • 2.dxe4#
    • 1...Bf6
      • 2.Sh6#
    • 1...Be7
      • 2.Kxe2#
      • 2.Ke3#
    • 1...Se6
      • 2.Bg6#
  • Tries
    • 1.Se3+?
      • 1...Rxe3+
        • 2.Kxe3#
      • 1...Kf6!
  • Keys
    • 1.Sb5!
      • threat
        • 2.Sd4#
      • 1...Qxg3+
        • 2.Kxg3#
      • 1...Qxg2+
        • 2.Kxg2#
      • 1...Re3+
        • 2.Kxe3#
      • 1...Rd6
        • 2.Sxd6#
      • 1...Re4
        • 2.dxe4#
      • 1...Bb6
        • 2.Sd6#
      • 1...Bf6
        • 2.Sh6#
      • 1...Se6
        • 2.Bg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(c);CHECK,XB(G)::R(B)+K(F),XQ(c)
    • Q(c);CHECK,XP(C)::R(B)+K(F),XQ(c)
    • R(j);CHECK::R(B)+K(F),XR(j)
    • R(j);OGATE::P(E),XR(j)
    • B(i);SBLOCK,S_CUTR(g)::S(I)
    • S(k);N_GUARD,SBLOCK,S_CUTR(g)::B(K)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • R(j);CHECK,XS(I)::R(B)+K(F),XR(j)
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • Q(c);CHECK,XB(G)::R(B)+K(F),XQ(c)
      • Q(c);CHECK,XP(C)::R(B)+K(F),XQ(c)
      • R(j);CHECK::R(B)+K(F),XR(j)
      • R(g);N_GUARD::S(D),XR(g)
      • R(j);OGATE::P(E),XR(j)
      • B(i);S_CUTR(g)::S(D)
      • B(i);SBLOCK,S_CUTR(g)::S(I)
      • S(k);N_GUARD,SBLOCK,S_CUTR(g)::B(K)
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).