MESON Chess Problem Database

Problem Display
PID: 239045 (K1Q5/1p2N1P1/b3N2b/8/3Pk1r1/n4R2/4B3/1r4q1 w - - 0 1)

Pituk, Alexander

L'Italia Scacchistica, 1961

K1Q5/1p2N1P1/b3N2b/8/3Pk1r1/n4R2/4B3/1r4q1

#2

8 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb5
      • 2.Qc2#
    • 1...b5
      • 2.Qc6#
    • 1...b6
      • 2.Qc6#
  • Tries
    • 1.Qc2+?
      • 1...Bd3
        • 2.Qxd3#
      • 1...Sxc2!
    • 1.Qf8?
      • threat
        • 2.Qf5#
      • 1...Rb5
        • 2.Bd3#
      • 1...Rg5
        • 2.Qf4#
      • 1...Rf4!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Sc5#
      • 1...Qxd4
        • 2.Qxd4#
      • 1...Rb5
        • 2.Qd3#
      • 1...Rg5
        • 2.Rf4#
      • 1...b6
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(c);N_GUARD,S_CUTB(f)::QAB(H)
    • P(h);N_GUARD::QAB(H)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::QAB1(H),XB(f)
      • Refutation
        • S(c);XQ(H)
    • Try
      • Q(H);
      • Threat
        • QAB1(H)
      • Vars
        • R(a);S_CUTB(f)::B(A)
        • R(e);N_GUARD,S_CUTB(g)::QAR1(H)
      • Refutation
        • R(e);
  • Actual
    • Q(H);
    • Threat
      • S(D)
    • Vars
      • Q(b);OGATE,XP(C)::QAR1(H),XQ(b)
      • R(a);S_CUTB(f)::QAB1(H)
      • R(e);N_GUARD,S_CUTB(g)::R1(B)
      • P(h);N_GUARD::QAB(H)
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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).