MESON Chess Problem Database

Problem Display
PID: 142960 (4KB2/2Np2P1/3r2p1/PPk1NbbR/1p1q4/1P6/3nr3/4RBQ1 w - - 0 1)

Piatesi, Antonio

Wiener Schachzeitung, 1937

4KB2/2Np2P1/3r2p1/PPk1NbbR/1p1q4/1P6/3nr3/4RBQ1

#2

12 + 10

274 diagrammes 1973

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe5+
      • 2.Rxe5#
    • 1...Be4
      • 2.Sxd7#
    • 1...Be6
      • 2.Sd3#
    • 1...Be3
      • 2.Sxd7#
    • 1...Be7
      • 2.Sd3#
    • 1...Se4
      • 2.Sd3#
  • Tries
    • 1.Rc1+?
      • 1...Sc4
        • 2.Rxc4#
      • 1...Bc2!
  • Keys
    • 1.g8Q!
      • threat
        • 2.Qd5#
      • 1...Rxe5+
        • 2.Rxe5#
      • 1...Rf2
        • 2.Sa6#
      • 1...Re3
        • 2.Sa6#
      • 1...Be4
        • 2.Sxd7#
      • 1...Be6
        • 2.Sd3#
      • 1...Be3
        • 2.Sxd7#
      • 1...Be7
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(b);CHECK,OGATE,XS(G)::R(A),XR(b)
    • B(f);N_PINS(G)::S(G),XP(j)
    • B(f);N_PINS(G)::S(G)
    • B(g);N_PINS(G),N_SPINQ(d)::S(G),XP(j)
    • B(g);N_PINS(G),N_SPINR(h)::S(G)
    • S(a);N_PINS(G)::S(G)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::R1(A),XS(a)
      • Refutation
        • B(f);P_SPINB(f)
  • Actual
    • P(J);
    • Threat
      • QAR1(J)
    • Vars
      • R(b);CHECK,OGATE,XS(G)::R(A),XR(b)
      • R(b);N_PINS(G),N_SPINQ(d)::S(I)
      • R(b);N_SPINQ(d)::S(I)
      • B(f);N_PINS(G)::S(G),XP(j)
      • B(f);N_PINS(G)::S(G)
      • B(g);N_PINS(G),N_SPINQ(d)::S(G),XP(j)
      • B(g);N_PINS(G),N_SPINR(h)::S(G)
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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).