MESON Chess Problem Database

Problem Display
PID: 16027 (1Q6/p7/3N4/2ppp3/3k4/R7/1K2p3/8 w - - 0 1)

Cuppini, Alessandro

Pat a Mat, 2000

1Q6/p7/3N4/2ppp3/3k4/R7/1K2p3/8

#2

4 + 6

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...c4
      • 2.Qxa7#
    • 1...e4
      • 2.Qh8#
  • Tries
    • 1.Kc2?
      • threat
        • 2.Rd3#
        • 2.Qb2#
      • 1...c4
        • 2.Qxa7#
      • 1...e4
        • 2.Qb2#
        • 2.Qh8#
      • 1...e1Q
        • 2.Rd3#
      • 1...e1B
        • 2.Rd3#
      • 1...e1S+!
    • 1.Sf5+?
      • 1...Kc4
        • 2.Rc3#
        • 2.Qb3#
      • 1...Ke4!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qc3#
        • 2.Qd3#
        • 2.Qe3#
      • 1...c4
        • 2.Qe3#
      • 1...e4
        • 2.Qc3#
      • 1...e1Q
        • 2.Qd3#
      • 1...e1S
        • 2.Qc3#
        • 2.Qe3#
      • 1...e1B
        • 2.Qd3#
        • 2.Qe3#
      • 1...e1R
        • 2.Qc3#
        • 2.Qd3#

Anticipated by 15658(1986)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB::QAB(D),XP(f)
    • P(e);OGATEB::QAB(D)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • P(c);OGATEB::QAB(D),XP(f)
        • P(a);::R1(B)
      • Refutation
        • P(a);CHECK
    • Try
      • S(C);CHECK
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(D);
    • Threat
      • DUALS(3)
    • Vars
      • P(c);::QAB1(D)
      • P(e);::QAB1(D)
      • P(a);::QAR1(D)
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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).