MESON Chess Problem Database

Problem Display
PID: 19005 (2n1N3/2p5/6N1/3k1p2/2R3n1/KQ6/B5p1/3r1b2 w - - 0 1)

Blake, Percy Francis

1st Prize, Magyar Sakkujsag, 1911

2n1N3/2p5/6N1/3k1p2/2R3n1/KQ6/B5p1/3r1b2

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc4
      • 2.Qxc4#
    • 1...Se5
      • 2.Sf4#
    • 1...Sd6
      • 2.Sxc7#
  • Tries
    • 1.Qxd1+?
      • 1...Ke6
        • 2.Re4#
        • 2.Rc6#
      • 1...Bd3!
    • 1.Qb5+?
      • 1...Ke6
        • 2.Re4#
      • 1...c5!
    • 1.Qb7+?
      • 1...c6
        • 2.Qxc6#
        • 2.Qf7#
      • 1...Ke6!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qc6#
      • 1...Rd3+
        • 2.Rc3#
      • 1...Ke6
        • 2.Re4#
      • 1...Bxc4
        • 2.Qxc4#
      • 1...Se5
        • 2.Sf4#
      • 1...Sd6
        • 2.Sxc7#
      • 1...Sa7
        • 2.Qd7#
      • 1...Se7
        • 2.Qd7#
      • 1...c5
        • 2.Rd4#
      • 1...c6
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • B(b);OGATE,P_SPINB(b),XR(D)::QAB1(C),XB(b)
    • S(d);SBLOCK::S(E)
    • S(h);SBLOCK::S(F),XP(g)
  • Tries
    • Try
      • Q(C);CHECK,XR(a)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • Q(C);CHECK
      • Vars
        • K(e);S_FLIGHT::B(A)+R(D),DCHECK
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • R(a);CHECK,S_CUTB(b)::B(A)+R(D)
      • K(e);S_FLIGHT::B(A)+R(D),DCHECK
      • B(b);OGATE,P_SPINB(b),XR(D)::QAB1(C),XB(b)
      • S(d);SBLOCK::S(E)
      • S(h);SBLOCK::S(F),XP(g)
      • S(h);N_GUARD::QAR2(C)
      • P(g);SBLOCK::B(A)+R(D),DCHECK
      • P(g);::QAB1(C),XP(g)
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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).