MESON Chess Problem Database

Problem Display
PID: 184957 (K4b2/8/3p1N2/8/5B1n/3k1pQ1/1pR1NP2/1B3b1q w - - 0 1)

Sparke, Arthur M

British Chess Magazine, 1917

K4b2/8/3p1N2/8/5B1n/3k1pQ1/1pR1NP2/1B3b1q

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sg2
      • 2.Qg6#
    • 1...Sg6
      • 2.Qxg6#
  • Tries
    • 1.Qg5?
      • threat
        • 2.Qb5#
        • 2.Qd5#
      • 1...Bxe2
        • 2.Qd5#
      • 1...Sf5
        • 2.Qxf5#
      • 1...d5
        • 2.Qxd5#
      • 1...fxe2+!
    • 1.Qg6+?
      • 1...Sf5
        • 2.Qxf5#
      • 1...Sxg6!
    • 1.Qg8?
      • threat
        • 2.Rxb2#
        • 2.Rd2#
        • 2.Qb3#
        • 2.Qc4#
        • 2.Qd5#
      • 1...Bxe2
        • 2.Qc4#
        • 2.Qd5#
      • 1...Bg2
        • 2.Rd2#
        • 2.Qb3#
        • 2.Qc4#
        • 2.Qd5#
      • 1...Bh3
        • 2.Rd2#
        • 2.Qb3#
        • 2.Qc4#
        • 2.Qd5#
      • 1...Sf5
        • 2.Rxb2#
        • 2.Rd2#
        • 2.Qb3#
        • 2.Qc4#
      • 1...d5
        • 2.Qxd5#
      • 1...fxe2+!
  • Keys
    • 1.Be3!
      • threat
        • 2.Sf4#
      • 1...fxe2+
        • 2.Rc6#
      • 1...Bxe2
        • 2.Rc1#
      • 1...Bh6
        • 2.Qxd6#
      • 1...Sg2
        • 2.Qg6#
      • 1...Sg6
        • 2.Qxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(f);N_GUARD::QAB(E)
    • S(f);N_GUARD::QAB(E),XS(f)
  • Tries
    • Try
      • Q(E);N_PINP(e)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);XS(C)::QAR2(E)
        • S(f);N_GUARD::QAB(E),XS(f)
        • P(g);::QAR2(E),XP(g)
      • Refutation
        • P(e);CHECK,XS(C)
    • Try
      • Q(E);CHECK,N_PINP(e)
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAB(E),XS(f)
      • Refutation
        • S(f);XQ(E)
    • Try
      • Q(E);N_PINP(e)
      • Threat
        • DUALS(5)
      • Vars
        • P(g);::QAR2(E),XP(g)
      • Refutation
        • P(e);CHECK,XS(C)
  • Actual
    • B(F);N_PINP(e)
    • Threat
      • S(C)
    • Vars
      • P(e);CHECK,SBLOCK,XS(C)::B(A)+R(B)
      • B(a);SBLOCK,XS(C)::B(A)+R(B)
      • B(h);N_GUARD::QAR(E),XP(g)
      • S(f);N_GUARD::QAB(E)
      • S(f);N_GUARD::QAB(E),XS(f)
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).