MESON Chess Problem Database

Problem Display
PID: 140056 (4NN2/5p2/1pQKp3/1B3kp1/2p3p1/3pP2b/8/8 w - - 0 1)

Wynne, RL

The Problemist, 1938

4NN2/5p2/1pQKp3/1B3kp1/2p3p1/3pP2b/8/8

#2

6 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...c3
      • 2.Bxd3#
    • 1...g3
      • 2.Qf3#
    • 1...f6
      • 2.Sg7#
  • Tries
    • 1.Qd5+?
      • 1...e5
        • 2.Bd7#
        • 2.Qxe5#
      • 1...exd5!
    • 1.Qc5+?
      • 1...Ke4
        • 2.Bc6#
      • 1...e5
        • 2.Qxe5#
      • 1...bxc5!
  • Keys
    • 1.Qh1!
      • 1...Bg2
        • 2.Qh7#
      • 1...g3
        • 2.Qf3#
      • 1...Bf1
        • 2.Qh7#
      • 1...d2
        • 2.Qb1#
      • 1...c3
        • 2.Bxd3#
      • 1...e5
        • 2.Bd7#
      • 1...f6
        • 2.Sg7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATE::B(B),XP(a)
    • P(d);N_GUARD::QAR2(C)
    • P(i);SBLOCK::S(E)
  • Tries
    • Try
      • Q(C);CHECK
      • Refutation
        • P(h);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(e);S_FLIGHT::B(B)
        • P(h);P_SPINP(h)::QAR1(C),XP(h)
      • Refutation
        • P(g);XQ(C)
  • Actual
    • Q(C);
    • Vars
      • B(b);OGATE::QAB(C)
      • P(d);N_GUARD::QAR2(C)
      • P(a);OGATEB::QAB(C)
      • P(c);OGATE::B(B),XP(a)
      • P(h);OGATEB::B(B)
      • P(i);SBLOCK::S(E)
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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).