MESON Chess Problem Database

Problem Display
PID: 152665 (b7/2NN3B/Q7/4pP1p/3bk1n1/4P1n1/3P2P1/R3K2R w KQ - 0 1)

Hannelius, Jan Ingvar

L'Italia Scacchistica, 1985

b7/2NN3B/Q7/4pP1p/3bk1n1/4P1n1/3P2P1/R3K2R

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bxa1
      • 2.Sc5#
    • 1...Bb2
      • 2.Sc5#
    • 1...Bc3
      • 2.Sc5#
    • 1...Bc5
      • 2.Sxc5#
    • 1...Sf1
      • 2.f6#
    • 1...Sxh1
      • 2.f6#
    • 1...Se2
      • 2.f6#
    • 1...Sf2
      • 2.Sf6#
    • 1...Sh2
      • 2.Sf6#
    • 1...Sf6
      • 2.Sxf6#
    • 1...Sh6
      • 2.Sf6#
  • Tries
    • 1.Qc4?
      • threat
        • 2.Sc5#
        • 2.Qc2#
      • 1...Sf2
        • 2.Sc5#
        • 2.Sf6#
      • 1...Sxe3!
  • Keys
    • 1.Qe2!
      • threat
        • 2.d3#
      • 1...Bxe3
        • 2.Ra4#
      • 1...Sxe2
        • 2.f6#
      • 1...Sxe3
        • 2.Rh4#
      • 1...Bc3
        • 2.Sc5#
      • 1...Sf2
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • B(b);N_GUARD,XR(A)::S(J)
    • B(b);N_GUARD::S(J)
    • B(b);N_GUARD,P_PINP(D)::S(J)
    • B(b);N_GUARD::S(J),XB(b)
    • S(a);N_GUARD::B(K)+P(G)
    • S(a);N_GUARD,XR(C)::B(K)+P(G)
    • S(d);N_GUARD::S(J)
    • S(d);N_GUARD::S(J),XS(d)
  • Tries
    • Try
      • Q(H);P_PINB(b)
      • Threat
        • DUALS(2)
      • Refutation
        • S(d);XP(F)
  • Actual
    • Q(H);
    • Threat
      • P(D)
    • Vars
      • B(b);OGATEB,P_SPINB(b),XP(F)::R(A)
      • S(a);N_GUARD,XQ(H)::B(K)+P(G)
      • S(d);OGATEB,P_SPINS(d),XP(F)::R(C)
      • B(b);N_GUARD,P_PINP(D)::S(J)
      • S(d);N_GUARD::S(J)
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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).