MESON Chess Problem Database

Problem Display
PID: 11366 (6B1/KN3nr1/1Bp2b2/pp1p2p1/q1k5/P1p3Q1/P1N5/5b2 w - - 0 1)

Thomas, WG

Chess, 1938

6B1/KN3nr1/1Bp2b2/pp1p2p1/q1k5/P1p3Q1/P1N5/5b2

#2

8 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc2
      • 2.Sxa5#
    • 1...Qb3
      • 2.Sxa5#
    • 1...Bd3
      • 2.Se3#
  • Tries
    • 1.Qd3+?
      • 1...Bxd3
        • 2.Se3#
      • 1...Kxd3!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qxf1#
      • 1...Qxc2
        • 2.Sxa5#
      • 1...d4
        • 2.Sd6#
      • 1...Be2
        • 2.Qxe2#
      • 1...Bg2
        • 2.Qe2#
      • 1...Bd3
        • 2.Se3#
      • 1...Bh3
        • 2.Qe2#
      • 1...Se5
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • Q(c);N_GUARD,XS(B)::S(G),XP(e)
    • Q(c);N_GUARD::S(G),XP(e)
    • B(a);SBLOCK::S(B)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • B(a);SBLOCK,XQ(D)::S(B)
      • Refutation
        • K(d);S_FLIGHT,XQ(D)
  • Actual
    • Q(D);
    • Threat
      • QAB(D),XB(a)
    • Vars
      • Q(c);N_GUARD,XS(B)::S(G),XP(e)
      • P(g);P_SPINS(k)::S(G)
      • B(a);N_GUARD::QAB(D),XB(a)
      • B(a);N_GUARD::QAB(D)
      • B(a);SBLOCK::S(B)
      • S(k);P_PINS(G),P_SPINP(g),S_CUTB(j)::QAR2(D)
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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).