MESON Chess Problem Database

Problem Display
PID: 274927 (1n4B1/4p3/1N1r4/2P1k1BN/2n5/2PP1R2/qr2p2b/4Q2K w - - 0 1)

Burda, Josef

Sachova skladba, 2023

1n4B1/4p3/1N1r4/2P1k1BN/2n5/2PP1R2/qr2p2b/4Q2K

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Sxc4#
    • 1...Qa1
      • 2.Sxc4#
    • 1...Qa3
      • 2.Sxc4#
    • 1...Qa5
      • 2.Sxc4#
    • 1...Qa7
      • 2.Sxc4#
    • 1...Qa8
      • 2.Sxc4#
    • 1...Rb3
      • 2.Sxc4#
    • 1...Bg1
      • 2.Qg3#
    • 1...Bg3
      • 2.Qxg3#
    • 1...e6
      • 2.Bf6#
  • Tries
    • 1.Qxe2+?
      • 1...Se3
        • 2.Qxe3#
      • 1...Rxe2!
  • Keys
    • 1.Sg3!
      • threat
        • 2.Rf5#
      • 1...Bxg3
        • 2.Qxg3#
      • 1...Qa8
        • 2.Sxc4#
      • 1...Rf6
        • 2.d4#
      • 1...Se3
        • 2.Rxe3#
      • 1...e6
        • 2.Bf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(a);N_GUARD,P_PINQ(A)::S(I),XS(e)
    • Q(a);N_GUARD::S(I),XS(e)
    • Q(a);N_GUARD,P_PINR(E)::S(I),XS(e)
    • R(b);S_CUTQ(a)::S(I),XS(e)
    • B(d);N_GUARD::QAB(A)
    • B(d);N_GUARD::QAB(A),XB(d)
    • P(h);N_GUARD,S_CUTR(g)::B(G)
  • Tries
    • Try
      • Q(A);CHECK,XP(c)
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAR2(A),XS(e)
      • Refutation
        • R(b);XQ(A)
  • Actual
    • S(H);
    • Threat
      • R1(E)
    • Vars
      • B(d);OGATE,XS(H)::QAB(A),XB(d)
      • Q(a);N_GUARD,P_PINR(E)::S(I),XS(e)
      • R(g);N_GUARD::P(D)
      • S(e);N_GUARD,N_SPINP(c)::R(E),XS(e)
      • P(h);N_GUARD,S_CUTR(g)::B(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).