MESON Chess Problem Database

Problem Display
PID: 147746 (2B4b/KN1nr3/p2Bn1R1/R3pk1P/r7/4QPPb/2N5/6q1 w - - 0 1)

Leites, Samuil Davidovich

L'Italia Scacchistica, 1930

2B4b/KN1nr3/p2Bn1R1/R3pk1P/r7/4QPPb/2N5/6q1

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe3+
      • 2.Sxe3#
    • 1...Re4
      • 2.fxe4#
    • 1...Sd4
      • 2.Qf4#
      • 2.Qg5#
      • 2.Qd3#
      • 2.Qe4#
    • 1...Sec5
      • 2.Qg5#
    • 1...Sdc5
      • 2.Qg5#
    • 1...Sb6
      • 2.Qg5#
    • 1...Sf6
      • 2.Rxe5#
      • 2.Rg5#
  • Tries
    • 1.Sd4+?
      • 1...Sxd4
        • 2.Qf4#
        • 2.Qg5#
        • 2.Qd3#
        • 2.Qe4#
      • 1...Rxd4!
  • Keys
    • 1.Bb4!
      • threat
        • 2.Sd6#
      • 1...Qxe3+
        • 2.Sxe3#
      • 1...Qd1
        • 2.Qe4#
      • 1...Sdc5
        • 2.Qg5#
      • 1...Sb6
        • 2.Sd4#
        • 2.Qf4#
        • 2.Qg5#
        • 2.Qd3#
        • 2.Qe4#
      • 1...Sf6
        • 2.Sd4#
        • 2.Rxe5#
        • 2.Rg5#
      • 1...Sb8
        • 2.Sd4#
      • 1...Sdf8
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(a);CHECK,XQ(B)::S(A),XQ(a)
    • R(c);OGATE::P(C),XR(c)
    • S(g);N_PINQ(B),N_SPINP(d),P_SPINS(h)::QAR1(B)
    • S(h);N_PINQ(B),N_SPINP(d),P_PINS(J),P_SPINS(g)::QAR1(B)
    • S(h);N_PINQ(B),P_PINS(J),P_SPINS(g)::QAR1(B)
  • Tries
    • Try
      • S(A);CHECK,N_SPINQ(B)
      • Refutation
        • R(c);XS(A)
  • Actual
    • B(G);
    • Threat
      • S(J)
    • Vars
      • Q(a);CHECK,XQ(B)::S(A),XQ(a)
      • Q(a);N_PINQ(B)::QAB1(B)
      • S(h);N_PINQ(B),N_SPINP(d),P_PINS(J),P_SPINS(g)::QAR1(B)
      • S(h);P_PINS(J),P_SPINS(g)::S(A)
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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).