MESON Chess Problem Database

Problem Display
PID: 146579 (3B4/1B6/rnp1K3/nk1N4/p2P4/pb2N3/3Q4/1R2b3 w - - 0 1)

Chicco, Adriano

Il Problema, 1933

3B4/1B6/rnp1K3/nk1N4/p2P4/pb2N3/3Q4/1R2b3

#2

8 + 9

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Bf2
      • 2.Qb4#
    • 1...Bg3
      • 2.Qb4#
    • 1...Bh4
      • 2.Qb4#
    • 1...Sac4
      • 2.Sc7#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Sxa3#
        • 2.Sd6#
      • 1...Kxc4
        • 2.Bxa6#
      • 1...Saxc4
        • 2.Sc7#
      • 1...Sxb7
        • 2.Sxa3#
      • 1...Bg3
        • 2.Sxa3#
        • 2.Qb4#
      • 1...Sc8
        • 2.Sxa3#
      • 1...a2
        • 2.Sa3#
        • 2.Sd6#
      • 1...Sbxc4!
    • 1.Rxb3+?
      • 1...Sxb3
        • 2.Sc7#
      • 1...axb3!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Sxa3#
      • 1...Kc4
        • 2.Sxa3#
        • 2.Bxa6#
        • 2.Qe2#
      • 1...Sac4
        • 2.Sc7#
      • 1...Sbc4
        • 2.Sc3#
      • 1...a2
        • 2.Sa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::QAR1(B)
    • S(e);N_PINS(E)::S(E)
  • Tries
    • Try
      • S(C);N_SPINS(E)
      • Threat
        • DUALS(2)
      • Vars
        • K(f);N_GUARD,N_SPINB(c),S_FLIGHT,XS(C)::B(G),XR(g)
        • S(e);SBLOCK,XS(C)::S(E)
        • S(e);XB(G)::S(C),XP(b)
        • S(h);::S(C),XP(b)
      • Refutation
        • S(h);XS(C)
    • Try
      • R(A);CHECK,N_SPINS(E),XB(c)
      • Vars
        • S(e);XR(A)::S(E)
      • Refutation
        • P(d);XR(A)
  • Actual
    • S(C);
    • Threat
      • S(C),XP(b)
    • Vars
      • S(e);N_PINS(E),SBLOCK::S(E)
      • S(h);N_PINS(E),SBLOCK::S(E)
      • P(b);::S(C)
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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).