MESON Chess Problem Database

Problem Display
PID: 87689 (1b1Q1B2/3N4/r1r4p/3kNP1K/6R1/q6p/4B3/8 w - - 0 1)

Narroway, Edward

American Chess Problemist, 1950

1b1Q1B2/3N4/r1r4p/3kNP1K/6R1/q6p/4B3/8

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Bf3#
    • 1...Qb2
      • 2.Bf3#
    • 1...Qc5
      • 2.Bf3#
    • 1...Qd6
      • 2.Bf3#
    • 1...Qa1
      • 2.Bf3#
    • 1...Qa2
      • 2.Bf3#
    • 1...Qf3
      • 2.Bxf3#
    • 1...Qa5
      • 2.Bf3#
    • 1...Rc4
      • 2.Bxc4#
    • 1...Rb6
      • 2.Bc4#
    • 1...Rd6
      • 2.Bc4#
    • 1...Re6
      • 2.Bc4#
    • 1...Rf6
      • 2.Bc4#
    • 1...Rg6
      • 2.Bc4#
    • 1...Bxe5
      • 2.Sb6#
      • 2.Sf6#
  • Tries
    • 1.Qa5+?
      • 1...Qc5
        • 2.Bf3#
        • 2.Bc4#
      • 1...Qxa5
        • 2.Bf3#
      • 1...Rc5
        • 2.Bc4#
      • 1...Rxa5!
  • Keys
    • 1.Bd6!
      • threat
        • 2.Sf6#
      • 1...Kxd6
        • 2.Rd4#
      • 1...Qxd6
        • 2.Bf3#
      • 1...Rxd6
        • 2.Bc4#
      • 1...Bxd6
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 12
  • Sets
    • Q(a);N_GUARD::B(A)
    • Q(a);N_GUARD,P_PINR(B)::B(A),XQ(a)
    • R(e);N_GUARD::B(A),XR(e)
    • R(e);N_GUARD::B(A)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • Q(a);XQ(G)::B(A)
        • R(e);P_SPINR(e)::B(A)
      • Refutation
        • R(d);XQ(G)
  • Actual
    • B(H);
    • Threat
      • S(F)
    • Vars
      • K(c);P-FLIGHT,XB(H)::R(B)
      • Q(a);N_GUARD,SBLOCK,XB(H)::B(A)
      • R(e);N_GUARD,SBLOCK,XB(H)::B(A)
      • B(g);SBLOCK,XB(H)::QAB(G)
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).