MESON Chess Problem Database

Problem Display
PID: 17781 (3Q3K/4ppNN/R1bP2kp/8/6nb/3R4/8/1B6 w - - 0 1)

Hassberg, Eric Manfred

SEPA, 1949

3Q3K/4ppNN/R1bP2kp/8/6nb/3R4/8/1B6

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bf6
      • 2.Rd5#
    • 1...Sf2
      • 2.Rg3#
    • 1...Sh2
      • 2.Rg3#
    • 1...Se5
      • 2.Rg3#
    • 1...Sf6
      • 2.Rg3#
    • 1...exd6
      • 2.Sf8#
      • 2.Rxd6#
    • 1...e5
      • 2.Sf8#
    • 1...e6
      • 2.Sf8#
  • Tries
    • 1.Sf8+?
      • 1...Kf6
        • 2.Qxe7#
      • 1...Kg5!
    • 1.dxe7?
      • threat
        • 2.Rd6#
      • 1...f5
        • 2.Qe8#
        • 2.e8Q#
        • 2.e8B#
      • 1...Bf6
        • 2.Rd5#
      • 1...Sf6
        • 2.Rg3#
      • 1...f6!
  • Keys
    • 1.d7!
      • threat
        • 2.Rd6#
      • 1...f5
        • 2.Qe8#
      • 1...f6
        • 2.Qe8#
      • 1...Bf6
        • 2.Rd5#
      • 1...Sf6
        • 2.Rg3#
      • 1...e6
        • 2.Sf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(b);P_PINS(E),S_CUTP(g)::B(A)+R(B)
    • S(a);::B(A)+R(B),DCHECK
    • P(f);::S(F)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINP(f)::QAB1(G),XP(f)
      • Refutation
        • K(d);P-FLIGHT,P_SPINP(f)
    • Try
      • P(D);P_PINB(c),XP(f)
      • Threat
        • B(A)+R(B),DCHECK
      • Vars
        • B(b);N_SPINB(c),P_PINS(E),S_CUTP(g)::B(A)+R(B)
        • S(a);N_SPINB(c)::B(A)+R(B),DCHECK
      • Refutation
        • P(g);N_SPINB(c)
  • Actual
    • P(D);P_PINB(c)
    • Threat
      • B(A)+R(B),DCHECK
    • Vars
      • P(g);OGATEB::QAB(G)
      • P(g);N_SPINB(c),OGATEB::QAB(G)
      • B(b);N_SPINB(c),P_PINS(E),S_CUTP(g)::B(A)+R(B)
      • S(a);N_SPINB(c)::B(A)+R(B),DCHECK
      • P(f);N_SPINB(c)::S(F)
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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).