MESON Chess Problem Database

Problem Display
PID: 199870 (1BB3Nb/r1p1Rp1r/1q1p4/pP1k4/5R2/QP5b/K2p4/3N4 w - - 0 1)

Servais, Albert

1st Prize, Lefebvre MT, 1943

1BB3Nb/r1p1Rp1r/1q1p4/pP1k4/5R2/QP5b/K2p4/3N4

#2

10 + 11

5110 Bekroonde Problemen 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Sxe3#
    • 1...Qa6
      • 2.Se3#
    • 1...Qc6
      • 2.Se3#
    • 1...Qb7
      • 2.Se3#
    • 1...Qxb8
      • 2.Se3#
    • 1...Rg7
      • 2.Sc3#
      • 2.Sf6#
    • 1...Bc3
      • 2.Sxc3#
    • 1...Bf6
      • 2.Sxf6#
    • 1...c5
      • 2.Se3#
    • 1...c6
      • 2.Qxd6#
    • 1...f6
      • 2.Sc3#
  • Tries
    • 1.Bb7+?
      • 1...Qc6
        • 2.Se3#
        • 2.Bxc6#
      • 1...Qxb7
        • 2.Se3#
      • 1...c6
        • 2.Qxd6#
      • 1...Rxb7!
    • 1.Re5+?
      • 1...Bxe5
        • 2.Se7#
      • 1...dxe5
        • 2.Sc3#
        • 2.Se7#
      • 1...Kxe5!
  • Keys
    • 1.Ree4!
      • threat
        • 2.Se7#
      • 1...c5
        • 2.Se3#
      • 1...Bf6
        • 2.Sxf6#
      • 1...c6
        • 2.Qxd6#
      • 1...f5
        • 2.Be6#
      • 1...f6
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(e);N_GUARD::S(A),XQ(e)
    • Q(e);N_GUARD::S(A)
    • Q(e);N_GUARD,XB(H)::S(A)
    • B(k);N_GUARD::S(A),XB(k)
    • B(k);N_GUARD::S(J),XB(k)
    • P(h);S_CUTQ(e)::S(A)
    • P(h);N_GUARD,S_CUTQ(e)::QAR1(C),XP(f)
    • P(i);S_CUTB(k)::S(A)
  • Tries
    • Try
      • B(I);CHECK
      • Vars
        • Q(e);XB(I)::S(A)
        • P(h);P_SPINP(h)::QAR1(C),XP(f)
      • Refutation
        • R(g);XB(I)
    • Try
      • R(G);CHECK
      • Vars
        • B(k);SBLOCK,XR(G)::S(J)
      • Refutation
        • K(d);P-FLIGHT,XR(G)
  • Actual
    • R(G);
    • Threat
      • S(J)
    • Vars
      • P(h);S_CUTQ(e)::S(A)
      • B(k);N_GUARD::S(J),XB(k)
      • P(h);N_GUARD,S_CUTQ(e)::QAR1(C),XP(f)
      • P(i);N_GUARD,S_CUTB(b)::B(I)
      • P(i);S_CUTB(k)::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).