MESON Chess Problem Database

Problem Display
PID: 277882 (BQ3R2/8/2P1b2B/Kp1RPN2/2P1kqr1/2p2N2/2P1pp1b/8 w - - 0 1)

Lacny, Ludovit

Pat a Mat, 2014

BQ3R2/8/2P1b2B/Kp1RPN2/2P1kqr1/2p2N2/2P1pp1b/8

#2

12 + 9

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Sd6#
    • 1...Qd2
      • 2.Sd6#
    • 1...Qe3
      • 2.Sd6#
    • 1...Qg3
      • 2.Sd6#
    • 1...Qxf3
      • 2.Sd6#
      • 2.Rd4#
  • Tries
    • 1.Sd2+?
      • 1...Qxd2
        • 2.Sd6#
      • 1...cxd2!
    • 1.Sd6+?
      • 1...Ke3
        • 2.Rd3#
      • 1...Kxf3!
    • 1.c7?
      • threat
        • 2.Rd4#
      • 1...Kxf3
        • 2.Rd3#
      • 1...Qxf3
        • 2.Sd6#
      • 1...Bxd5
        • 2.Bxd5#
      • 1...Bxf5
        • 2.Rd3#
      • 1...Bf7!
  • Keys
    • 1.Rd3!
      • threat
        • 2.Sd6#
      • 1...Qxe5
        • 2.Re3#
      • 1...Qxf3
        • 2.Rd4#
      • 1...Qxf5
        • 2.Re3#
      • 1...Bxf5
        • 2.c7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(f);::S(G)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • Q(f);XS(B)::S(G)
      • Refutation
        • P(d);XS(B)
    • Try
      • S(G);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINQ(f)::R1(E)
      • Refutation
        • K(e);P_SPINQ(f),S_FLIGHT,XS(B)
    • Try
      • P(H);
      • Threat
        • B(J)+R(E),DCHECK
      • Vars
        • K(e);S_FLIGHT,XS(B)::B(J)+R(E),DCHECK
        • Q(f);XS(B)::S(G)
        • B(i);OGATE,P_SPINB(i),XR(E)::B(J),XB(i)
        • B(i);N_GUARD,XS(G)::B(J)+R(E)
      • Refutation
        • B(i);
  • Actual
    • R(E);
    • Threat
      • S(G)
    • Vars
      • Q(f);N_GUARD,XP(F)::R1(E)
      • Q(f);SBLOCK,XS(B)::R1(E)
      • Q(f);N_GUARD,XS(G)::R1(E)
      • B(i);N_GUARD,XS(G)::B(J)+P(H)
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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).