MESON Chess Problem Database

Problem Display
PID: 267856 (1b2n3/4r1p1/Rq6/1Np1kP2/1pB1N2P/2r5/3P2Q1/B4RK1 w - - 0 1)

Laib, Kurt Friedrich

Comm., El Diluvio, 1932

1b2n3/4r1p1/Rq6/1Np1kP2/1pB1N2P/2r5/3P2Q1/B4RK1

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...b3
      • 2.Bxc3#
  • Tries
    • 1.Sexc3?
      • threat
        • 2.Sb1#
        • 2.Sd1#
        • 2.Sa2#
        • 2.Se2#
        • 2.Sa4#
        • 2.Se4#
        • 2.Sd5#
      • 1...Kf6
        • 2.Se4#
      • 1...Qxa6
        • 2.Sa2#
        • 2.Sa4#
      • 1...bxc3
        • 2.Bxc3#
      • 1...Qa5
        • 2.Sa2#
        • 2.Sa4#
        • 2.Qe4#
        • 2.Qd5#
        • 2.Qe2#
        • 2.Qh2#
        • 2.Qg3#
      • 1...Qd8
        • 2.Sd5#
        • 2.Qe4#
        • 2.Qe2#
        • 2.Qh2#
        • 2.Qg3#
      • 1...Qd6
        • 2.Sd5#
      • 1...Rd7
        • 2.Sd5#
      • 1...b3!
  • Keys
    • 1.Sf2!
      • threat
        • 2.Sg4#
      • 1...Kf4
        • 2.Sd3#
      • 1...Kxf5
        • 2.Qg5#
      • 1...Kf6
        • 2.Sg4#
      • 1...Qxb5
        • 2.Qe4#
      • 1...Qg6
        • 2.Sd3#
      • 1...Sf6
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • P(b);N_GUARD::B(A),XR(a)
  • Tries
    • Try
      • S(G);XR(a)
      • Threat
        • DUALS(7)
      • Vars
        • K(d);P_SPINQ(e),S_FLIGHT::B(A)+S(G),DCHECK
        • P(b);OGATE,P_SPINP(b),XS(G)::B(A),XP(b)
        • Q(e);::B(A)+S(G)
        • R(f);::B(A)+S(G)
      • Refutation
        • P(b);
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • K(d);N_GUARD,N_SPINR(a),S_FLIGHT::R(B)+S(G),DCHECK
      • K(d);N_SPINR(a),OGATEB,P-FLIGHT,XP(J)::QAR1(E)
      • K(d);P_SPINQ(e),S_FLIGHT::S(G)
      • Q(e);XS(I)::QAR1(E)
      • Q(e);P_PINQ(E)::S(G)
      • S(i);SBLOCK::S(G)
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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).