MESON Chess Problem Database

Problem Display
PID: 101998 (QB6/4p1p1/R4PNb/1qp1rk2/4N2P/r4p2/1p5n/1B4RK w - - 0 1)

Cabral, Renato

Boletim da UBP, 1963

QB6/4p1p1/R4PNb/1qp1rk2/4N2P/r4p2/1p5n/1B4RK

#2

10 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4
      • 2.Sxe7#
      • 2.Bxe4#
      • 2.Qxe4#
    • 1...Rd5
      • 2.Sxe7#
    • 1...Bg5
      • 2.Rxg5#
    • 1...Sg4
      • 2.Sg3#
  • Tries
    • 1.Sc3+?
      • 1...Re4
        • 2.Sxe7#
        • 2.Bxe4#
        • 2.Qxe4#
      • 1...Qd3!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qxe5#
      • 1...Qxb8
        • 2.Sc3#
      • 1...Rxd5
        • 2.Sxe7#
      • 1...exf6
        • 2.Sd6#
      • 1...gxf6
        • 2.Sd6#
      • 1...Bg5
        • 2.Rxg5#
      • 1...Sg4
        • 2.Sg3#
      • 1...Bf4
        • 2.Sxe7#
      • 1...c4
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(g);N_GUARD::S(H),XP(j)
    • B(i);N_GUARD::R1(B),XB(i)
    • S(b);SBLOCK::B(A)+S(D),DCHECK
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • Q(e);P_SPINQ(e)
  • Actual
    • Q(I);P_PINR(g)
    • Threat
      • QAR1(I),XR(g)
    • Vars
      • Q(e);N_GUARD,XB(J)::B(A)+S(D)
      • R(g);N_SPINR(g),XQ(I)::S(H),XP(j)
      • P(j);SBLOCK,XP(G)::B(A)+S(D),DCHECK
      • P(k);SBLOCK,XP(G)::B(A)+S(D),DCHECK
      • B(i);N_GUARD::R1(B),XB(i)
      • S(b);SBLOCK::B(A)+S(D),DCHECK
      • B(i);SBLOCK::S(H),XP(j)
      • P(f);S_CUTQ(e)::B(A)+S(D)
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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).