MESON Chess Problem Database

Problem Display
PID: 227549 (8/n7/8/p2Pq1p1/k2NR3/P1K5/8/1N3B2 w - - 0 1)

Mari, Alberto

Comm., Falkirk Herald, 1926

8/n7/8/p2Pq1p1/k2NR3/P1K5/8/1N3B2

#2

7 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.Sc2#
      • 2.Sb3#
      • 2.Sf3#
      • 2.Sb5#
      • 2.Sf5#
      • 2.Sc6#
      • 2.Se6#
    • 1...Qg3+
      • 2.Sf3#
    • 1...Qxd4+
      • 2.Rxd4#
    • 1...Qc7+
      • 2.Sc6#
    • 1...Qb8
      • 2.Sb5#
    • 1...Qf5
      • 2.Sxf5#
    • 1...Qe6
      • 2.Sxe6#
    • 1...Qe8
      • 2.Se6#
    • 1...Sb5+
      • 2.Bxb5#
    • 1...Sc6
      • 2.Bb5#
    • 1...Sc8
      • 2.Bb5#
  • Tries
    • 1.Rxe5?
      • 1...Sb5+
        • 2.Bxb5#
      • 1...Sc6
        • 2.Bb5#
      • 1...Sc8
        • 2.Bb5#
      • 1...g4!
  • Keys
    • 1.Kb2!
      • threat
        • 2.Sc3#
      • 1...Qh2+
        • 2.Sc2#
      • 1...Qb8+
        • 2.Sb5#
      • 1...Qg3
        • 2.Sc2#
        • 2.Sb3#
        • 2.Sf3#
        • 2.Sb5#
        • 2.Sf5#
        • 2.Sc6#
        • 2.Se6#
      • 1...Qc7
        • 2.Sc6#
      • 1...Sb5
        • 2.Bxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(c);CHECK,N_PINS(E)::R(F)+S(E)
    • Q(c);CHECK,OGATE,P_SPINQ(c),XS(E)::R(F),XQ(c)
    • Q(c);N_PINS(E)::R(F)+S(E)
    • Q(c);N_PINS(E)::R(F)+S(E),XQ(c)
    • S(e);CHECK,N_GUARD::B(B),XS(e)
    • S(e);N_GUARD::B(B)
  • Tries
    • Try
      • R(F);N_SPINS(E),XQ(c)
      • Vars
        • S(e);CHECK,N_GUARD::B(B),XS(e)
        • S(e);N_GUARD::B(B)
      • Refutation
        • P(d);
  • Actual
    • K(D);S_FLIGHT
    • Threat
      • S(A)
    • Vars
      • Q(c);CHECK,N_PINS(E),SBLOCK::R(F)+S(E)
      • Q(c);CHECK,N_PINS(E)::R(F)+S(E)
      • Q(c);N_PINS(E)::R(F)+S(E)
      • S(e);N_GUARD::B(B),XS(e)
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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).