MESON Chess Problem Database

Problem Display
PID: 275037 (1n4B1/1K1P4/p7/rp1R1p2/2kN1PP1/7p/3P3b/nQ1N1bq1 w - - 0 1)

Gevers, Raymond

Die Schwalbe, 1933

1n4B1/1K1P4/p7/rp1R1p2/2kN1PP1/7p/3P3b/nQ1N1bq1

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Sxe3#
    • 1...Qh1
      • 2.Se3#
    • 1...Qg2
      • 2.Se3#
    • 1...Qxg4
      • 2.Se3#
    • 1...Bg2
      • 2.d3#
    • 1...Sc2
      • 2.Qb3#
    • 1...Sb3
      • 2.Qxb3#
    • 1...b4
      • 2.Sb2#
  • Keys
    • 1.Kb6!
      • threat
        • 2.Rd6#
      • 1...Qxd4+
        • 2.Rc5#
      • 1...Sxd7+
        • 2.Rxd7#
      • 1...Qxg4
        • 2.Se3#
      • 1...Sc2
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#
      • 1...Qe3
        • 2.Sxe3#
      • 1...Qh1
        • 2.Se3#
      • 1...Qg2
        • 2.Se3#
      • 1...Bg2
        • 2.d3#
      • 1...b4
        • 2.Sb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(c);N_GUARD::S(B),XQ(c)
    • Q(c);N_GUARD,P_PINR(G)::S(B)
    • Q(c);N_GUARD,XP(F)::S(B)
    • B(b);N_GUARD,P_PINR(G)::P(C)
    • S(a);N_GUARD::QAB1(A)
    • S(a);N_GUARD::QAB1(A),XS(a)
    • P(h);SBLOCK::S(B)
  • Actual
    • K(H);P-FLIGHT,P_SPINS(D)
    • Threat
      • B(J)+R(G)
    • Vars
      • Q(c);CHECK,SBLOCK,XS(D)::B(J)+R(G),DCHECK
      • S(k);CHECK,OGATE,XP(I)::B(J)+R(G),XS(k)
      • Q(c);N_GUARD,N_PINS(D),XP(F)::S(B)
      • S(a);N_GUARD::QAB1(A)
      • S(a);N_GUARD::QAB1(A),XS(a)
      • Q(c);N_GUARD::S(B),XQ(c)
      • Q(c);N_GUARD,N_PINS(D)::S(B)
      • B(b);N_GUARD::P(C)
      • P(h);SBLOCK::S(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).