MESON Chess Problem Database

Problem Display
PID: 532 (B6Q/3rbp2/1B6/3p4/2PNk3/1N4Pp/2KP4/8 w - - 0 1)

Ling, John Francis

Comm., The Observer, 1959

B6Q/3rbp2/1B6/3p4/2PNk3/1N4Pp/2KP4/8

#2

9 + 6

5454 Near Snap 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Sc5#
    • 1...Ra7
      • 2.Bxd5#
    • 1...Rc7
      • 2.Bxd5#
    • 1...Bh4
      • 2.Sc5#
    • 1...Bc5
      • 2.Sxc5#
    • 1...Bg5
      • 2.Sc5#
    • 1...Bd6
      • 2.Bxd5#
    • 1...Bd8
      • 2.Sc5#
  • Tries
    • 1.Qf6?
      • threat
        • 2.Qf4#
        • 2.Qf5#
      • 1...Bd6
        • 2.Bxd5#
        • 2.Qf5#
      • 1...Bxf6!
    • 1.Qxh3?
      • threat
        • 2.Qf5#
      • 1...f5
        • 2.Qxf5#
      • 1...Ke5!
    • 1.Qh4+?
      • 1...Ke5
        • 2.Qf4#
      • 1...Bxh4!
    • 1.Qh5?
      • threat
        • 2.Qe2#
        • 2.Qf5#
      • 1...f5
        • 2.Qe2#
        • 2.Qxf5#
      • 1...Bg5!
    • 1.Qh6?
      • threat
        • 2.Qe3#
        • 2.Qf4#
      • 1...Ke5
        • 2.Qf4#
      • 1...Bd6
        • 2.Qe3#
      • 1...Bg5!
    • 1.Qh7+?
      • 1...f5
        • 2.Qxf5#
      • 1...Ke5!
  • Keys
    • 1.Bc7!
      • threat
        • 2.Qe5#
      • 1...Rxc7
        • 2.Bxd5#
      • 1...Rd6
        • 2.Sc5#
      • 1...Bd6
        • 2.Bxd5#
      • 1...Bf6
        • 2.Qh7#
      • 1...f6
        • 2.Qh4#

Anticipated by 64761(1922)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(d);S_CUTB(e)::S(C)
    • R(d);N_GUARD::B(H),XP(c)
    • R(d);N_GUARD,P_PINP(E)::B(H),XP(c)
    • B(e);N_GUARD::S(C)
    • B(e);N_GUARD::S(C),XB(e)
    • B(e);S_CUTR(d)::B(H),XP(c)
  • Tries
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Refutation
        • B(e);XQ(I)
    • Try
      • Q(I);XP(a)
      • Threat
        • QAB1(I)
      • Vars
        • P(f);::QAB1(I),XP(f)
      • Refutation
        • K(b);N_SPINP(c),P-FLIGHT
    • Try
      • Q(I);CHECK
      • Vars
        • K(b);N_SPINP(c),P-FLIGHT::QAB1(I)
      • Refutation
        • B(e);XQ(I)
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Refutation
        • B(e);
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);N_SPINP(c),P-FLIGHT::QAB1(I)
        • B(e);::QAR1(I)
      • Refutation
        • B(e);
    • Try
      • Q(I);CHECK
      • Vars
        • P(f);::QAB1(I),XP(f)
      • Refutation
        • K(b);N_SPINP(c),P-FLIGHT
  • Actual
    • B(G);
    • Threat
      • QAR1(I)
    • Vars
      • R(d);N_GUARD,P_PINP(E),XB(G)::B(H),XP(c)
      • R(d);S_CUTB(e)::S(C)
      • B(e);S_CUTR(d)::B(H),XP(c)
      • B(e);S_CUTP(f)::QAB(I)
      • P(f);S_CUTB(e)::QAR(I)
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).