MESON Chess Problem Database

Problem Display
PID: 178599 (1K1kn2r/pp4N1/2PP3n/8/1Q3P2/7b/8/8 w - - 0 1)

de Nascimento, RM

Boletim da UBP, 1980

1K1kn2r/pp4N1/2PP3n/8/1Q3P2/7b/8/8

#2

6 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Se6#
    • 1...Bg2
      • 2.Se6#
    • 1...Be6
      • 2.Sxe6#
    • 1...Sg4
      • 2.Se6#
    • 1...Sf5
      • 2.Se6#
    • 1...Sc7
      • 2.dxc7#
  • Tries
    • 1.Qa5+?
      • 1...Sc7
        • 2.Qxc7#
        • 2.Qg5#
      • 1...b6!
    • 1.Qe4?
      • threat
        • 2.Qe7#
      • 1...Be6
        • 2.Sxe6#
      • 1...Sf5
        • 2.Se6#
      • 1...Sg8
        • 2.Qxe8#
      • 1...Sxd6!
    • 1.Qb6+?
      • 1...Sc7
        • 2.Qxc7#
      • 1...axb6!
    • 1.Qxb7?
      • threat
        • 2.Qe7#
      • 1...Sxd6
        • 2.Qc7#
      • 1...Bd7
        • 2.Qxd7#
      • 1...Sf5
        • 2.Se6#
        • 2.Qc8#
        • 2.Qd7#
      • 1...Sc7
        • 2.Qxc7#
      • 1...Sg8!
    • 1.c7+?
      • 1...Kd7
        • 2.c8Q#
      • 1...Sxc7!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Qe7#
      • 1...Sxd6
        • 2.Qh4#
      • 1...Be6
        • 2.Sxe6#
      • 1...Sf5
        • 2.Se6#
      • 1...Sg8
        • 2.Qxe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD::S(E)
    • B(a);N_GUARD::S(E),XB(a)
    • S(b);S_CUTB(a)::S(E)
    • S(f);OGATE::P(D),XS(f)
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • P(d);P_SPINP(d)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • B(a);N_GUARD::S(E),XB(a)
        • S(b);S_CUTB(a)::S(E)
        • S(b);S_CUTR(g)::QAR1(A),XS(f)
      • Refutation
        • S(f);XP(D)
    • Try
      • Q(A);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAB1(A),XS(f)
      • Refutation
        • P(c);XQ(A)
    • Try
      • Q(A);XP(d)
      • Threat
        • QAB1(A)
      • Vars
        • S(f);N_GUARD,XP(D)::QAB1(A)
        • B(a);N_GUARD::QAR1(A),XB(a)
        • S(f);N_GUARD::QAB1(A),XS(f)
      • Refutation
        • S(b);
    • Try
      • P(C);CHECK
      • Vars
        • K(e);P-FLIGHT::P=Q
      • Refutation
        • S(f);XP(C)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • S(f);N_GUARD,XP(D)::QAB(A)
      • B(a);N_GUARD::S(E),XB(a)
      • S(b);S_CUTB(a)::S(E)
      • S(b);S_CUTR(g)::QAR1(A),XS(f)
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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).