MESON Chess Problem Database

Problem Display
PID: 74911 (5BQ1/2r3pN/3Pr3/1P1kp2R/1Kpn4/1P6/N1B1PP2/1n1R3b w - - 0 1)

Golha, Jan

Poddukelske noviny, 1980

5BQ1/2r3pN/3Pr3/1P1kp2R/1Kpn4/1P6/N1B1PP2/1n1R3b

#2

13 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ra7
      • 2.bxc4#
    • 1...Rb7
      • 2.bxc4#
    • 1...Rd7
      • 2.bxc4#
    • 1...Rf7
      • 2.bxc4#
    • 1...Sd2
      • 2.Sc3#
    • 1...Sa3
      • 2.Sc3#
    • 1...Sc3
      • 2.Sxc3#
    • 1...g5
      • 2.Sf6#
    • 1...g6
      • 2.Sf6#
  • Tries
    • 1.Sg5?
      • threat
        • 2.Qxe6#
      • 1...Rf7
        • 2.bxc4#
      • 1...Sd2
        • 2.Sc3#
      • 1...Re7!
    • 1.Bf5?
      • threat
        • 2.Qxe6#
      • 1...Rf7
        • 2.bxc4#
      • 1...Sd2
        • 2.Sc3#
      • 1...Re7!
    • 1.Rh6?
      • threat
        • 2.Qxe6#
      • 1...gxh6
        • 2.Sf6#
      • 1...Rf7
        • 2.bxc4#
      • 1...Sd2
        • 2.Sc3#
      • 1...g6
        • 2.Sf6#
      • 1...Re7!
    • 1.f4?
      • threat
        • 2.Rxe5#
      • 1...Rf7
        • 2.bxc4#
      • 1...g5
        • 2.Sf6#
      • 1...Re7!
  • Keys
    • 1.e3!
      • threat
        • 2.Rxd4#
      • 1...Sd2
        • 2.Sc3#
      • 1...g5
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 7
  • Sets
    • R(h);N_GUARD::P(F),XP(c)
    • R(h);N_GUARD,P_PINP(H)::P(F),XP(c)
    • R(h);N_GUARD,N_SPINR(g)::P(F),XP(c)
    • S(a);N_GUARD,N_SPINS(d)::S(B)
    • S(a);N_GUARD::S(B)
    • S(a);N_GUARD::S(B),XS(a)
    • P(i);N_GUARD,N_SPINP(f)::S(K)
    • P(i);N_GUARD::S(K)
  • Tries
    • Try
      • S(K);N_PINP(f)
      • Threat
        • QAB1(M),XR(g)
      • Vars
        • R(h);N_GUARD,N_SPINR(g)::P(F),XP(c)
        • S(a);N_GUARD,N_SPINS(d)::S(B)
      • Refutation
        • R(h);
    • Try
      • B(C);N_PINP(f)
      • Threat
        • QAB1(M),XR(g)
      • Vars
        • R(h);N_GUARD,N_SPINR(g)::P(F),XP(c)
        • S(a);N_GUARD,N_SPINS(d)::S(B)
      • Refutation
        • R(h);
    • Try
      • R(I);N_PINP(f)
      • Threat
        • QAB1(M),XR(g)
      • Vars
        • P(i);N_GUARD,XR(I)::S(K)
        • R(h);N_GUARD,N_SPINR(g)::P(F),XP(c)
        • S(a);N_GUARD,N_SPINS(d)::S(B)
        • P(i);N_GUARD::S(K)
      • Refutation
        • R(h);
    • Try
      • P(E);
      • Threat
        • R1(I),XP(f)
      • Vars
        • R(h);N_GUARD,N_SPINR(g)::P(F),XP(c)
        • P(i);N_GUARD,N_SPINP(f)::S(K)
      • Refutation
        • R(h);
  • Actual
    • P(D);
    • Threat
      • R1(A),XS(d)
    • Vars
      • S(a);N_GUARD,N_SPINS(d)::S(B)
      • P(i);N_GUARD,N_SPINP(f)::S(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).