MESON Chess Problem Database

Problem Display
PID: 65716 (1n2b1N1/1PBk1p1r/1Pp2Rpr/3Np2p/p1Q5/q7/6B1/2b4K w - - 0 1)

Lacny, Ludovit

4th Prize, Phenix, 1989

1n2b1N1/1PBk1p1r/1Pp2Rpr/3Np2p/p1Q5/q7/6B1/2b4K

#2

9 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Bh3#
      • 2.Rd6#
    • 1...Qb4
      • 2.Bh3#
    • 1...Qc5
      • 2.Bh3#
    • 1...Qd6
      • 2.Rxd6#
    • 1...Qf8
      • 2.Bh3#
    • 1...Qa1
      • 2.Bh3#
      • 2.Rd6#
    • 1...Qa2
      • 2.Bh3#
      • 2.Rd6#
    • 1...Qb3
      • 2.Rd6#
    • 1...Qc3
      • 2.Rd6#
    • 1...Qd3
      • 2.Rd6#
    • 1...Qe3
      • 2.Rd6#
    • 1...Qf3
      • 2.Rd6#
    • 1...Qg3
      • 2.Rd6#
    • 1...Qh3+
      • 2.Bxh3#
    • 1...Be3
      • 2.Bh3#
    • 1...Sa6
      • 2.Qxc6#
    • 1...h4
      • 2.Qg4#
    • 1...c5
      • 2.Rd6#
  • Tries
    • 1.Sb4?
      • threat
        • 2.Rd6#
      • 1...Qh3+
        • 2.Bxh3#
      • 1...Qxb4
        • 2.Bh3#
      • 1...Qd3
        • 2.Qxd3#
      • 1...g5!
    • 1.Rxf7+?
      • 1...Ke6
        • 2.Sc3#
        • 2.Se3#
        • 2.Sb4#
        • 2.Sf4#
      • 1...Qe7
        • 2.Sdf6#
        • 2.Bh3#
      • 1...Bxf7
        • 2.Sdf6#
      • 1...Rxf7!
    • 1.Qc5?
      • threat
        • 2.Rd6#
      • 1...Qh3+
        • 2.Bxh3#
      • 1...Qxc5
        • 2.Bh3#
      • 1...g5!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Bh3#
      • 1...Qxd3
        • 2.Rd6#
      • 1...g5
        • 2.Qf5#
      • 1...Qb4
        • 2.Sxb4#
      • 1...Qd6
        • 2.Rxd6#
      • 1...Qe7
        • 2.Sdxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 12
  • Sets
    • Q(b);N_GUARD::B(B)
    • Q(b);N_GUARD::R1(F),XQ(b)
    • Q(b);N_GUARD::R1(F)
    • Q(b);N_GUARD,P_PINB(B)::R1(F)
    • Q(b);CHECK,N_GUARD::B(B),XQ(b)
    • B(a);S_CUTQ(b)::B(B)
    • S(l);N_GUARD::QAB1(C),XP(f)
    • P(e);N_GUARD::QAB(C)
    • P(f);S_CUTQ(b)::R1(F)
  • Tries
    • Try
      • S(D);
      • Threat
        • R1(F)
      • Vars
        • Q(b);CHECK,N_GUARD::B(B),XQ(b)
        • Q(b);N_GUARD,XS(D)::B(B)
        • Q(b);N_GUARD::QAR(C),XQ(b)
      • Refutation
        • P(g);
    • Try
      • R(F);CHECK,XP(j)
      • Vars
        • B(m);XR(F)::S(D)
      • Refutation
        • R(k);XR(F)
    • Try
      • Q(C);
      • Threat
        • R1(F)
      • Vars
        • Q(b);CHECK,N_GUARD::B(B),XQ(b)
        • Q(b);N_GUARD,XQ(C)::B(B)
      • Refutation
        • P(g);
  • Actual
    • Q(C);
    • Threat
      • B(B)
    • Vars
      • Q(b);N_GUARD,XQ(C)::R1(F)
      • P(g);N_GUARD::QAB(C)
      • Q(b);N_GUARD::QAR(C)+S(D),XQ(b)
      • Q(b);N_GUARD::R1(F),XQ(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).