MESON Chess Problem Database

Problem Display
PID: 239057 (2K5/5n1B/2QpR3/2N5/3k2bR/1PrN4/2P2P1b/B3qn2 w - - 0 1)

Segers, Marcel

L'Italia Scacchistica, 1935

2K5/5n1B/2QpR3/2N5/3k2bR/1PrN4/2P2P1b/B3qn2

#2

11 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qd2
      • 2.Qe4#
    • 1...Qxf2
      • 2.Qe4#
    • 1...Qxa1
      • 2.Qe4#
    • 1...Qb1
      • 2.Qe4#
    • 1...Qc1
      • 2.Qe4#
    • 1...Qd1
      • 2.Qe4#
    • 1...Qe4
      • 2.Qxe4#
    • 1...Qxe6+
      • 2.Sxe6#
    • 1...Se3
      • 2.Qe4#
    • 1...Se5
      • 2.Qxd6#
    • 1...dxc5
      • 2.Qxc5#
    • 1...d5
      • 2.Qa4#
  • Tries
    • 1.Bxc3+?
      • 1...Qxc3
        • 2.Qe4#
      • 1...Kxc3!
    • 1.Rxg4+?
      • 1...Qe4
        • 2.Rgxe4#
        • 2.Rexe4#
        • 2.Qxe4#
      • 1...Bf4!
    • 1.b4?
      • threat
        • 2.Sb3#
      • 1...Qxe6+
        • 2.Sxe6#
      • 1...Kc4
        • 2.Sb3#
      • 1...Qxa1
        • 2.Qe4#
      • 1...dxc5
        • 2.Qxc5#
      • 1...Qb1
        • 2.Qe4#
      • 1...Sd2!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Qc4#
      • 1...Qxa1
        • 2.Re4#
      • 1...Qxe6
        • 2.Bxc3#
      • 1...Sd2
        • 2.Bxc3#
      • 1...Se3
        • 2.Re4#
      • 1...Se5
        • 2.Rxd6#
      • 1...d5
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • Q(a);N_GUARD::QAR1(H)
    • Q(a);N_GUARD,XP(C)::QAR1(H)
    • Q(a);N_GUARD,N_SPINR(d),XB(A)::QAR1(H)
    • Q(a);N_GUARD,N_SPINB(f)::QAR1(H),XQ(a)
    • Q(a);CHECK,XR(I)::S(G),XQ(a)
    • S(b);S_CUTQ(a)::QAR1(H)
    • S(h);N_GUARD,S_CUTB(c)::QAR2(H),XP(g)
    • P(g);OGATE,XS(G)::QAB1(H),XP(g)
    • P(g);SBLOCK::QAR(H)
  • Tries
    • Try
      • B(A);CHECK,XR(d)
      • Vars
        • Q(a);SBLOCK,XB(A)::QAR1(H)
      • Refutation
        • K(e);N_SPINB(f),S_FLIGHT,XB(A)
    • Try
      • R(F);CHECK,N_SPINR(I),XB(f)
      • Refutation
        • B(c);P_SPINB(c)
    • Try
      • P(D);
      • Threat
        • S(G)
      • Vars
        • Q(a);CHECK,XR(I)::S(G),XQ(a)
        • K(e);N_SPINR(d),P-FLIGHT::QAR(H)+S(G)
        • Q(a);N_GUARD,N_SPINR(d),XB(A)::QAR1(H)
        • P(g);OGATE,XS(G)::QAB1(H),XP(g)
        • Q(a);N_GUARD::QAR1(H)
      • Refutation
        • S(b);
  • Actual
    • S(G);N_SPINR(I),P_SPINQ(H)
    • Threat
      • QAR1(H)
    • Vars
      • Q(a);N_GUARD,N_SPINR(d),XB(A)::R1(I)
      • Q(a);N_GUARD,P_PINS(G),XR(I)::B(A),XR(d)
      • S(b);S_CUTQ(a)::B(A),XR(d)
      • S(b);S_CUTQ(a)::R1(I)
      • S(h);N_GUARD,S_CUTB(c)::R(I),XP(g)
      • P(g);N_GUARD::QAB1(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).