MESON Chess Problem Database

Problem Display
PID: 109891 (K2bBnN1/1p2P3/1Rb1kN2/R3n3/8/6Q1/4r3/8 w - - 0 1)

Carlos, Renato

O Globo, 1933

K2bBnN1/1p2P3/1Rb1kN2/R3n3/8/6Q1/4r3/8

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qg4#
    • 1...Ra2
      • 2.Qxe5#
    • 1...Rb2
      • 2.Qxe5#
    • 1...Rc2
      • 2.Qxe5#
    • 1...Rd2
      • 2.Qxe5#
    • 1...Rf2
      • 2.Qxe5#
    • 1...Rg2
      • 2.Qxe5#
    • 1...Rh2
      • 2.Qxe5#
    • 1...Sd3
      • 2.exd8S#
      • 2.exf8S#
    • 1...Sf3
      • 2.exd8S#
      • 2.exf8S#
    • 1...Sc4
      • 2.exd8S#
      • 2.exf8S#
    • 1...Sg4
      • 2.exd8S#
      • 2.exf8S#
    • 1...Seg6
      • 2.exd8S#
    • 1...Sed7
      • 2.exd8S#
    • 1...Sf7
      • 2.exf8S#
  • Tries
    • 1.Bd7+?
      • 1...Kd6
        • 2.e8S#
      • 1...Kf7
        • 2.exd8S#
        • 2.e8Q#
        • 2.e8B#
      • 1...Sexd7
        • 2.exd8S#
      • 1...Sfxd7!
    • 1.Rxc6+?
      • 1...Kf5
        • 2.Sh6#
        • 2.Qg4#
      • 1...Sxc6
        • 2.exf8S#
      • 1...bxc6!
    • 1.exd8S+?
      • 1...Kf5
        • 2.Qg4#
      • 1...Kd6!
    • 1.exf8S+?
      • 1...Kf5
        • 2.Bg6#
        • 2.Qg4#
      • 1...Kd6!
  • Keys
    • 1.Bf7+!
      • 1...Kf5
        • 2.Qg4#
      • 1...Kd6
        • 2.e8S#
      • 1...Kxf7
        • 2.exd8S#
      • 1...Sxf7
        • 2.exf8S#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • K(d);N_SPINB(c),P_SPINS(b),S_FLIGHT::QAB1(A)
    • R(a);N_GUARD,P_PINR(B)::QAR1(A),XS(b)
    • R(a);N_GUARD::QAR1(A),XS(b)
    • S(b);::PXB(f)=S
    • S(b);::PXS(g)=S
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINS(b)::P=S
        • S(b);N_GUARD,S_CUTS(g),XB(G)::PXB(f)=S
      • Refutation
        • S(g);XB(G)
    • Try
      • R(C);CHECK,XB(c)
      • Vars
        • S(b);N_GUARD,S_CUTP(e),XR(C)::PXS(g)=S
      • Refutation
        • P(e);XR(C)
    • Try
      • P(E);CHECK,XB(f)
      • Vars
        • K(d);N_SPINB(c),P_SPINS(b),S_FLIGHT::QAB1(A)
      • Refutation
        • K(d);P-FLIGHT,P_SPINS(b)
    • Try
      • P(E);CHECK,XS(g)
      • Refutation
        • K(d);P-FLIGHT,P_SPINS(b)
  • Actual
    • B(G);CHECK
    • Vars
      • K(d);N_SPINB(c),P_SPINS(b),S_FLIGHT::QAB1(A)
      • K(d);P-FLIGHT,P_SPINS(b)::P=S
      • K(d);N_SPINB(c),S_FLIGHT,XB(G)::PXB(f)=S
      • S(b);N_GUARD,SBLOCK,XB(G)::PXS(g)=S
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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).