MESON Chess Problem Database

Problem Display
PID: 145334 (2N1KB2/p1R1p2r/2n4p/1Rpk3r/b1p5/2P2N1p/7b/4Q3 w - - 0 1)

Piatesi, Antonio

The Problemist, 1979

2N1KB2/p1R1p2r/2n4p/1Rpk3r/b1p5/2P2N1p/7b/4Q3

#2

8 + 12

56 The Problemist 1980

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Rd7#
    • 1...Sb4
      • 2.Rxc5#
    • 1...Sd4
      • 2.Rxc5#
    • 1...Sa5
      • 2.Rxc5#
    • 1...Sb8
      • 2.Rxc5#
    • 1...Sd8
      • 2.Rxc5#
    • 1...e6
      • 2.Rxc5#
  • Tries
    • 1.Sb6+?
      • 1...Kd6
        • 2.Rd7#
      • 1...axb6!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qe6#
      • 1...Sxd4
        • 2.Rxc5#
      • 1...Re5
        • 2.Rd7#
      • 1...Be5
        • 2.Qh1#
      • 1...Se5
        • 2.Rxc5#
      • 1...Sd8
        • 2.Rxc5#
      • 1...e5
        • 2.Rxc5#
      • 1...e6
        • 2.Rxc5#
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • B(a);N_GUARD::R(E)
    • S(h);OGATE,P_PINR(D)::R1(E),XP(e)
    • P(k);::R1(D),XP(e)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(f);N_SPINP(e),P-FLIGHT,P_SPINP(k)::R1(E)
      • Refutation
        • P(j);XS(F)
  • Actual
    • S(C);
    • Threat
      • QAB1(A)
    • Vars
      • S(h);OGATE,P_PINR(D),XS(C)::R1(E),XP(e)
      • R(g);S_CUTB(a)::R(E)
      • B(a);SBLOCK::QAB(A)
      • S(h);OGATE,P_PINR(D)::R1(E),XP(e)
      • P(k);::R1(D),XP(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).