MESON Chess Problem Database

Problem Display
PID: 11543 (B1K5/B2Np3/P1R5/3PPp2/2P1kp2/1N1p1n1R/3q4/2Q1b3 w - - 0 1)

Froberg, Johan Hilding Laurentius

De Maasbode, 1939

B1K5/B2Np3/P1R5/3PPp2/2P1kp2/1N1p1n1R/3q4/2Q1b3

#2

12 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sd4
      • 2.Sbc5#
    • 1...Sxe5
      • 2.Sdc5#
  • Tries
    • 1.Sxd2+?
      • 1...Sxd2
        • 2.Qxe1#
      • 1...Bxd2!
    • 1.Sdc5+?
      • 1...Kxe5
        • 2.Bb8#
        • 2.Re6#
      • 1...Ke3!
    • 1.Sf6+?
      • 1...Kxe5
        • 2.Bb8#
        • 2.Re6#
      • 1...exf6!
  • Keys
    • 1.d6!
      • threat
        • 2.Rc7#
      • 1...Sxe5
        • 2.Sdc5#
      • 1...exd6
        • 2.Rxd6#
      • 1...Qb4
        • 2.Rb6#
      • 1...Qa5
        • 2.Rc5#
      • 1...Sd4
        • 2.Sbc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(d);SBLOCK::S(B)
    • S(d);SBLOCK,XP(F)::S(J)
  • Tries
    • Try
      • S(B);CHECK,XQ(b)
      • Vars
        • S(d);XS(B)::QAR(A),XB(a)
      • Refutation
        • B(a);XS(B)
    • Try
      • S(J);CHECK
      • Refutation
        • K(e);P-FLIGHT,P_SPINQ(b),P_SPINS(d)
    • Try
      • S(J);CHECK
      • Refutation
        • P(h);XS(J)
  • Actual
    • P(E);
    • Threat
      • B(K)+R(H)
    • Vars
      • S(d);SBLOCK,XP(F)::S(J)
      • P(h);OGATE,XP(E)::B(K)+R(H),XP(h)
      • Q(b);::B(K)+R(H)
      • S(d);SBLOCK::S(B)
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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).