MESON Chess Problem Database

Problem Display
PID: 150417 (1Nb1B3/3qB3/Rp2p3/1k1n3Q/1P2Pr2/1R1Kp3/5b2/8 w - - 0 1)

Spence, Jack Lee

Chess, 1955

1Nb1B3/3qB3/Rp2p3/1k1n3Q/1P2Pr2/1R1Kp3/5b2/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Bxc6#
    • 1...Bxa6
      • 2.Bxd7#
  • Keys
    • 1.Qe2!
      • threat
        • 2.Kc2#
        • 2.Kd4#
      • 1...Sc3+
        • 2.Kxc3#
      • 1...Sxb4+
        • 2.Kc3#
      • 1...Sf6+
        • 2.Kc2#
        • 2.Kc3#
      • 1...Sc7+
        • 2.Kc2#
        • 2.Kc3#
      • 1...Sxe7+
        • 2.Kc2#
        • 2.Kc3#
      • 1...Rxe4
        • 2.Kxe4#
      • 1...Bxa6
        • 2.Bxd7#
      • 1...Qc6
        • 2.Kd4#
        • 2.Bxc6#
      • 1...e5
        • 2.Kc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(h);OGATE::B(I),XQ(h)
    • B(i);N_GUARD,XR(F)::B(I),XQ(h)
  • Actual
    • Q(E);N_PINS(e)
    • Threat
      • DUALS(2)
    • Vars
      • S(e);CHECK::QAB(E)+K(B),XS(e)
      • S(e);CHECK,P_SPINS(e),XP(C)::QAB(E)+K(B)
      • R(c);XP(D)::QAB(E)+K(B),XR(c)
      • B(i);N_GUARD,XR(F)::B(I),XQ(h)
      • P(g);::QAB(E)+K(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).