MESON Chess Problem Database

Problem Display
PID: 18747 (1b3nB1/r4P2/1N1pk1qR/pR2p1P1/4QBb1/4P3/2N5/1K6 w - - 0 1)

Hassberg, Eric Manfred

HM., BCF, 1958-1959

1b3nB1/r4P2/1N1pk1qR/pR2p1P1/4QBb1/4P3/2N5/1K6

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Re7
      • 2.Sd4#
    • 1...Sd7
      • 2.f8Q#
      • 2.f8B#
  • Tries
    • 1.Qd5+?
      • 1...Kf5
        • 2.Sd4#
      • 1...Ke7!
    • 1.Qxg6+?
      • 1...Ke7
        • 2.Qf6#
      • 1...Sxg6!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Rxe5#
      • 1...Kf5
        • 2.Sd4#
      • 1...Ke7
        • 2.Qe8#
      • 1...exf4
        • 2.Qe4#
      • 1...Sd7
        • 2.f8Q#
      • 1...e4
        • 2.Re5#
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(g);SBLOCK::S(B)
    • S(i);OGATE::P=Q
  • Tries
    • Try
      • Q(D);CHECK,N_PINP(c),P_SPINS(B)
      • Vars
        • K(e);N_PINS(B),N_SPINQ(f),P_SPINP(c),S_FLIGHT::S(B)
      • Refutation
        • K(e);N_SPINQ(f),P-FLIGHT
    • Try
      • Q(D);CHECK,N_PINP(c),XQ(f)
      • Vars
        • K(e);P-FLIGHT::QAB1(D)
      • Refutation
        • S(i);P_SPINS(i),XQ(D)
  • Actual
    • Q(D);N_PINP(c),P_PINP(d),P_SPINS(B)
    • Threat
      • R1(F),XP(c)
    • Vars
      • K(e);N_PINS(B),N_SPINP(d),N_SPINQ(f),P_SPINP(c),S_FLIGHT::S(B)
      • K(e);N_SPINP(d),N_SPINQ(f),P-FLIGHT::QAR1(D)
      • P(c);OGATEB,XB(E)::QAR2(D)
      • S(i);OGATE::P=Q
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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).