MESON Chess Problem Database

Problem Display
PID: 70337 (1r2n3/5R2/1pNk1n2/5P2/1P2P3/1KQp2q1/8/2b2b2 w - - 0 1)

May, Willy Paul

Chess, 1950

1r2n3/5R2/1pNk1n2/5P2/1P2P3/1KQp2q1/8/2b2b2

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...b5
      • 2.Qc5#
  • Tries
    • 1.Qd4+?
      • 1...Sd5
        • 2.Qxd5#
      • 1...Kxc6!
    • 1.Qe5+?
      • 1...Kxc6
        • 2.b5#
      • 1...Qxe5!
    • 1.e5+?
      • 1...Kd5
        • 2.Qc4#
      • 1...Qxe5!
  • Keys
    • 1.Sa7!
      • threat
        • 2.Sb5#
      • 1...Sxe4
        • 2.Qd4#
      • 1...Qe5
        • 2.Qc6#
      • 1...Sc7
        • 2.Qxc7#
      • 1...d2
        • 2.Qxg3#
      • 1...b5
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(e);N_GUARD::QAB1(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::QAR1(B),XS(g)
      • Refutation
        • K(f);P-FLIGHT,XS(F)
    • Try
      • Q(B);CHECK
      • Vars
        • K(f);P-FLIGHT,XS(F)::P(C)
      • Refutation
        • Q(d);XQ(B)
    • Try
      • P(D);CHECK
      • Vars
        • K(f);P-FLIGHT::QAB1(B)
      • Refutation
        • Q(d);XP(D)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • S(g);N_GUARD,XP(D)::QAR2(B)
      • Q(d);SBLOCK::QAR1(B)
      • S(i);N_GUARD::QAB1(B),XS(i)
      • P(c);OGATE,P_PINQ(B)::QAB(B),XQ(d)
      • P(e);N_GUARD::QAB1(B)
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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).