MESON Chess Problem Database

Problem Display
PID: 57610 (6K1/2R1N3/1p2k1p1/R2N2P1/1p2r3/1Bb2bB1/2r5/5Q2 w - - 0 1)

Morra, Juan Carlos

Chess Life, 1957

6K1/2R1N3/1p2k1p1/R2N2P1/1p2r3/1Bb2bB1/2r5/5Q2

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bd4
      • 2.Sc3#
    • 1...Bd1
      • 2.Qf7#
    • 1...Bh1
      • 2.Qf7#
    • 1...Be2
      • 2.Qf7#
    • 1...Bg2
      • 2.Qf7#
    • 1...Bg4
      • 2.Qf7#
    • 1...Bh5
      • 2.Qf7#
    • 1...bxa5
      • 2.Qa6#
    • 1...b5
      • 2.Ra6#
  • Tries
    • 1.Qb5?
      • threat
        • 2.Qc6#
        • 2.Qd7#
        • 2.Qxb6#
      • 1...bxa5
        • 2.Qa6#
        • 2.Qc6#
        • 2.Qd7#
        • 2.Qb6#
      • 1...Be5
        • 2.Qd7#
      • 1...Rc4
        • 2.Qd7#
      • 1...Ba1
        • 2.Qd7#
      • 1...Be1
        • 2.Qd7#
      • 1...Bb2
        • 2.Qd7#
      • 1...Bd2
        • 2.Qd7#
      • 1...Bd4
        • 2.Sc3#
        • 2.Qd7#
      • 1...Bf6
        • 2.Qd7#
      • 1...Bg7
        • 2.Qd7#
      • 1...Bh8
        • 2.Qd7#
      • 1...Rf4!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Sf4#
      • 1...bxa5
        • 2.Qa6#
      • 1...Rf4
        • 2.Sxf4#
      • 1...Rd4
        • 2.Qxg6#
      • 1...Bd4
        • 2.Sc3#
      • 1...b5
        • 2.Ra6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • B(b);S_CUTR(e)::B(B)+S(E)
    • B(c);OGATE::QAB1(A)
    • P(f);OGATEB,XR(D)::QAR(A)
    • P(f);OGATEB::R(D)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • B(b);::QAB1(A)
        • R(e);::QAB1(A)
      • Refutation
        • R(e);
  • Actual
    • Q(A);
    • Threat
      • B(B)+S(E),DCHECK
    • Vars
      • P(f);OGATEB,XR(D)::QAR(A)
      • R(e);::B(B)+S(E),DCHECK,XR(e)
      • R(e);OGATE::QAR2(A),XP(h)
      • B(b);S_CUTR(e)::B(B)+S(E)
      • P(f);OGATEB::R(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).