MESON Chess Problem Database

Problem Display
PID: 10910 (7q/8/5N1Q/6P1/2n2kBP/2K2Pp1/b2Pp3/4B3 w - - 0 1)

Ellerman, Arnoldo

The Problemist, 1969

7q/8/5N1Q/6P1/2n2kBP/2K2Pp1/b2Pp3/4B3

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Bxg3#
    • 1...Qxf6+
      • 2.Qxf6#
    • 1...Se5
      • 2.Sh5#
  • Tries
    • 1.Qxh8?
      • threat
        • 2.Sd5#
        • 2.Sh5#
      • 1...Ke5
        • 2.Bxg3#
      • 1...Sb2
        • 2.Sh5#
        • 2.Qb8#
      • 1...Sa3
        • 2.Sh5#
        • 2.Qb8#
      • 1...Se3
        • 2.Sh5#
        • 2.Qb8#
      • 1...Sa5
        • 2.Sh5#
        • 2.Qb8#
      • 1...Se5
        • 2.Sh5#
      • 1...Sb6
        • 2.Sh5#
        • 2.Qb8#
      • 1...Sd6
        • 2.Sh5#
      • 1...Sxd2!
  • Keys
    • 1.d4!
      • threat
        • 2.Sd5#
      • 1...Ke3
        • 2.Sd5#
      • 1...Qxf6
        • 2.gxf6#
      • 1...Qa8
        • 2.g6#
      • 1...Qd8
        • 2.g6#
      • 1...Qg8
        • 2.g6#
      • 1...Sb2
        • 2.Bd2#
      • 1...Sd2
        • 2.Bxd2#
      • 1...Sa3
        • 2.Bd2#
      • 1...Se3
        • 2.Sh5#
      • 1...Sa5
        • 2.Bd2#
      • 1...Se5
        • 2.Bd2#
      • 1...Sb6
        • 2.Bd2#
      • 1...Sd6
        • 2.Bd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 11
    • REMOVED MATES = 1
  • Sets
    • K(e);N_PINS(H),S_FLIGHT::B(A),XP(c)
    • Q(f);CHECK,OGATE,XS(H)::QAR2(I),XQ(f)
    • S(d);N_PINS(H),SBLOCK::S(H)
  • Tries
    • Try
      • Q(I);N_SPINS(H),XQ(f)
      • Threat
        • DUALS(2)
      • Vars
        • K(e);S_FLIGHT::B(A),XP(c)
        • S(d);::S(H)
      • Refutation
        • S(d);XP(B)
  • Actual
    • P(B);N_SPINS(H)
    • Threat
      • S(H)
    • Vars
      • K(e);S_FLIGHT::S(H)
      • Q(f);OGATE,P_PINP(B),XS(H)::QAB(I)+P(G),XQ(f)
      • Q(f);N_GUARD::QAB(I)+P(G)
      • S(d);N_GUARD::B(A)
      • S(d);N_GUARD::B(A),XS(d)
      • S(d);SBLOCK::S(H)
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).