MESON Chess Problem Database

Problem Display
PID: 199593 (1b2n3/pPP4B/3PN1R1/1N1kp1p1/8/5q2/1pQ1P3/1K3bB1 w - - 0 1)

Einat, Paz

The Problemist, 1982

1b2n3/pPP4B/3PN1R1/1N1kp1p1/8/5q2/1pQ1P3/1K3bB1

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qh5
      • 2.e4#
    • 1...Qf2
      • 2.e4#
    • 1...Qa3
      • 2.e4#
    • 1...Qb3
      • 2.e4#
    • 1...Qg3
      • 2.e4#
    • 1...Qh3
      • 2.e4#
    • 1...Qf7
      • 2.e4#
    • 1...Qf8
      • 2.e4#
    • 1...e4
      • 2.Qc5#
  • Tries
    • 1.Sxg5?
      • threat
        • 2.Qc5#
      • 1...Qc3
        • 2.Qe4#
      • 1...Qe4
        • 2.Bg8#
        • 2.Qxe4#
      • 1...Qf2
        • 2.e4#
      • 1...Qa3
        • 2.Bg8#
        • 2.Qe4#
        • 2.e4#
      • 1...Qd3
        • 2.Bg8#
      • 1...Qe3
        • 2.Bg8#
      • 1...Qf5!
    • 1.Sd8?
      • threat
        • 2.Qc6#
      • 1...Qc3
        • 2.Bg8#
      • 1...Qd3
        • 2.Qxd3#
      • 1...e4
        • 2.Qc5#
      • 1...Qe4
        • 2.Bg8#
      • 1...Qf5!
  • Keys
    • 1.Bg8!
      • threat
        • 2.Sf4#
      • 1...Qc3
        • 2.Sd8#
      • 1...Qd3
        • 2.Sxg5#
      • 1...e4
        • 2.Qc5#
      • 1...Qf4
        • 2.Sxf4#
      • 1...Qf7
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • Q(c);N_GUARD::P(D)
    • P(e);SBLOCK::QAR1(C)
  • Tries
    • Try
      • S(G);XP(f)
      • Threat
        • QAR1(C)
      • Vars
        • Q(c);N_GUARD::QAB1(C)
        • Q(c);N_GUARD::P(D)
        • Q(c);N_GUARD,P_PINQ(C)::B(K)
        • Q(c);N_GUARD::B(K)
      • Refutation
        • Q(c);P_PINQ(C)
    • Try
      • S(G);
      • Threat
        • QAB1(C)
      • Vars
        • Q(c);N_GUARD::B(K)
        • Q(c);N_GUARD,P_PINQ(C)::QAR2(C),XQ(c)
        • P(e);SBLOCK::QAR1(C)
        • Q(c);N_GUARD,P_PINQ(C)::B(K)
      • Refutation
        • Q(c);P_PINQ(C)
  • Actual
    • B(K);
    • Threat
      • B(K)+S(G),DCHECK
    • Vars
      • Q(c);N_GUARD::B(K)+S(G)
      • Q(c);N_GUARD,P_PINQ(C)::B(K)+S(G),XP(f)
      • P(e);SBLOCK::QAR1(C)
      • Q(c);::B(K)+S(G),DCHECK,XQ(c)
      • Q(c);N_GUARD::P(D)
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).