MESON Chess Problem Database

Problem Display
PID: 109898 (1b1nN1Q1/1PPk4/8/1r2n3/N7/4R1K1/6B1/8 w - - 0 1)

Silveira, Mario

O Globo, 1981

1b1nN1Q1/1PPk4/8/1r2n3/N7/4R1K1/6B1/8

#2

8 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.cxb8S#
    • 1...Sf3
      • 2.cxb8S#
    • 1...Sc4
      • 2.cxb8S#
    • 1...Sg4
      • 2.cxb8S#
    • 1...Sg6
      • 2.cxb8S#
    • 1...Sef7
      • 2.cxb8S#
  • Tries
    • 1.Sc5+?
      • 1...Ke7
        • 2.c8S#
      • 1...Rxc5!
    • 1.Sb6+?
      • 1...Ke7
        • 2.c8S#
      • 1...Rxb6!
    • 1.Qf7+?
      • 1...Sexf7
        • 2.cxb8S#
      • 1...Sdxf7!
  • Keys
    • 1.Bh3+!
      • 1...Kc6
        • 2.cxd8S#
      • 1...Ke7
        • 2.c8S#
      • 1...Sg4
        • 2.cxb8S#
      • 1...Se6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • S(b);P_PINP(F)::PXB(d)=S
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::P=S
      • Refutation
        • R(a);XS(D)
    • Try
      • S(D);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::P=S
      • Refutation
        • R(a);XS(D)
    • Try
      • Q(H);CHECK
      • Vars
        • S(b);N_GUARD,P_PINP(F),S_CUTS(e),XQ(H)::PXB(d)=S
      • Refutation
        • S(e);XQ(H)
  • Actual
    • B(A);CHECK
    • Vars
      • K(c);S_FLIGHT::PXS(e)=S
      • K(c);P-FLIGHT,P_SPINS(b)::P=S
      • S(b);N_GUARD,P_PINP(F),P_SPINS(b),S_CUTS(e)::PXB(d)=S
      • S(e);N_GUARD,P_SPINS(e)::QAB1(H),XS(e)
HTML5 logo

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).