MESON Chess Problem Database

Problem Display
PID: 239054 (3RR3/4N1p1/B6B/1r4r1/1p3PP1/2PPk3/7Q/3bK2n w - - 0 1)

Segers, Marcel

L'Italia Scacchistica, 1931

3RR3/4N1p1/B6B/1r4r1/1p3PP1/2PPk3/7Q/3bK2n

#2

11 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.Sf5#
      • 2.Qd2#
    • 1...Sf2
      • 2.Qxf2#
    • 1...Sg3
      • 2.Qf2#
  • Tries
    • 1.Sd5+?
      • 1...Kxd3
        • 2.Bxb5#
      • 1...Kf3!
    • 1.Qg3+?
      • 1...Bf3
        • 2.Sf5#
      • 1...Sxg3!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Qe4#
      • 1...Kxf4
        • 2.Sg6#
      • 1...Rbe5
        • 2.Sd5#
      • 1...Rge5
        • 2.Sf5#
      • 1...Bf3
        • 2.Qd2#
      • 1...Sf2
        • 2.Qxf2#
      • 1...Sg3
        • 2.Qf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::QAB1(B),XS(b)
    • S(b);N_GUARD::QAB1(B)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINR(e),XP(D)::B(G),XR(e)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • B(a);P_SPINB(a)::R(K)+S(I),DCHECK
      • Refutation
        • S(b);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • K(c);P_SPINR(f),S_FLIGHT,XP(E)::S(I)
      • R(e);::S(I)
      • R(f);::S(I)
      • B(a);SBLOCK::QAB1(B)
      • S(b);N_GUARD::QAB1(B),XS(b)
      • S(b);N_GUARD::QAB1(B)
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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).