MESON Chess Problem Database

Problem Display
PID: 196409 (5R1Q/b1B3N1/4N3/5p2/K1P1k1B1/ppPr4/2P2P2/2qr3n w - - 0 1)

Burda, Josef

Sachova skladba, 2011

5R1Q/b1B3N1/4N3/5p2/K1P1k1B1/ppPr4/2P2P2/2qr3n

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Sg5#
    • 1...Qg5
      • 2.Sxg5#
    • 1...Qa1
      • 2.Sg5#
    • 1...Qb1
      • 2.Sg5#
    • 1...Qxc2
      • 2.Sg5#
    • 1...R1d2
      • 2.Sg5#
    • 1...R3d2
      • 2.Sg5#
    • 1...Re3
      • 2.Sg5#
    • 1...Be3
      • 2.f3#
    • 1...Bc5
      • 2.Sxc5#
    • 1...Bb8
      • 2.Sc5#
    • 1...fxg4
      • 2.Qh7#
    • 1...f4
      • 2.Sg5#
      • 2.Qh7#
  • Tries
    • 1.Sxf5?
      • threat
        • 2.Qe5#
      • 1...Rd5
        • 2.f3#
      • 1...Rd6
        • 2.f3#
      • 1...Bd4
        • 2.Sd6#
      • 1...Qf4!
    • 1.Se8?
      • threat
        • 2.Sf6#
        • 2.Qe5#
      • 1...Bxf2
        • 2.Qe5#
      • 1...Sxf2
        • 2.Qe5#
      • 1...fxg4
        • 2.Qe5#
        • 2.Qh7#
      • 1...Qf4
        • 2.Sf6#
      • 1...Qg5
        • 2.Sxg5#
        • 2.Qe5#
      • 1...Qh6
        • 2.Qe5#
      • 1...Rd5
        • 2.Sf6#
      • 1...Bd4
        • 2.Sd6#
      • 1...Rd6!
    • 1.Qxh1+?
      • 1...Rf3
        • 2.Bxf3#
        • 2.Bxf5#
        • 2.Qxf3#
      • 1...Rxh1!
  • Keys
    • 1.Rxf5!
      • threat
        • 2.Re5#
      • 1...Rd6
        • 2.Bf3#
      • 1...Qf4
        • 2.Rxf4#
      • 1...Qg5
        • 2.Sxg5#
      • 1...Rd5
        • 2.Bf3#
      • 1...Bd4
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 11
  • Sets
    • Q(a);N_GUARD::S(G)
    • Q(a);N_GUARD::S(G),XQ(a)
    • Q(a);N_GUARD,XP(A)::S(G)
    • R(b);S_CUTQ(a)::S(G)
    • R(f);S_CUTQ(a)::S(G)
    • B(i);SBLOCK,S_CUTR(f)::P(B)
    • B(i);N_GUARD::S(G),XB(i)
    • B(i);N_GUARD::S(G)
    • P(h);OGATEB,XB(F)::QAB(K)
  • Tries
    • Try
      • S(I);XP(h)
      • Threat
        • QAR1(K)
      • Vars
        • R(f);N_GUARD::P(B)
        • B(i);S_CUTR(f)::S(I)
      • Refutation
        • Q(a);
    • Try
      • S(I);
      • Threat
        • DUALS(2)
      • Vars
        • B(i);XP(B)::QAR1(K)
        • S(c);XP(B)::QAR1(K)
        • Q(a);::S(I)
        • Q(a);::QAR1(K)
        • R(f);::S(I)
        • B(i);S_CUTR(f)::S(I)
      • Refutation
        • R(f);
    • Try
      • Q(K);CHECK,XS(c)
      • Refutation
        • R(b);XQ(K)
  • Actual
    • R(J);XP(h)
    • Threat
      • R1(J)
    • Vars
      • R(f);N_GUARD::B(F)
      • Q(a);N_GUARD::R1(J),XQ(a)
      • Q(a);N_GUARD::S(G),XQ(a)
      • B(i);S_CUTR(f)::QAB(K)
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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).