MESON Chess Problem Database

Problem Display
PID: 90132 (B1K1n3/8/1Q2P3/bRN1P3/1p1k1NPR/1P6/3Pb2B/2r3n1 w - - 0 1)

Takacs, Peter

Die Schwalbe, 1949

B1K1n3/8/1Q2P3/bRN1P3/1p1k1NPR/1P6/3Pb2B/2r3n1

#2

13 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5+
      • 2.Qxc5#
    • 1...Sf3
      • 2.Sxe2#
    • 1...Sh3
      • 2.Sxe2#
    • 1...Sd6+
      • 2.Qxd6#
    • 1...Sg7
      • 2.Qd6#
  • Tries
    • 1.Qd8+?
      • 1...Kxe5
        • 2.Sxe2#
        • 2.Sg2#
        • 2.Sd3#
        • 2.Sh3#
        • 2.Sh5#
        • 2.Sg6#
        • 2.Rh5#
        • 2.d4#
      • 1...Sd6+
        • 2.Qxd6#
      • 1...Bxd8!
  • Keys
    • 1.e7!
      • threat
        • 2.Se6#
      • 1...Rxc5+
        • 2.Qxc5#
      • 1...Sd6+
        • 2.Qxd6#
      • 1...Kxe5
        • 2.Sxe2#
      • 1...Bc4
        • 2.Sce6#
      • 1...Sc7
        • 2.Sce6#
      • 1...Sg7
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(a);CHECK,OGATE,P_SPINR(a),XS(H)::QAB1(J),XR(a)
    • S(b);N_GUARD::S(D),XB(c)
    • S(g);CHECK,N_GUARD::QAR2(J),XS(g)
    • S(g);N_GUARD::QAR2(J)
  • Tries
    • Try
      • Q(J);CHECK
      • Vars
        • S(g);CHECK,N_GUARD,P_SPINS(g)::QAR2(J),XS(g)
      • Refutation
        • B(f);XQ(J)
  • Actual
    • P(K);
    • Threat
      • S(D)
    • Vars
      • R(a);CHECK,OGATE,P_SPINR(a),XS(H)::QAB1(J),XR(a)
      • S(g);CHECK,N_GUARD::QAR2(J),XS(g)
      • K(e);S_FLIGHT,XP(I)::B(B)+S(D),XB(c)
      • B(c);N_PINS(H)::QAB(J)+S(H),DCHECK
      • S(g);N_PINS(H)::QAB(J)+S(H),DCHECK
      • S(g);N_GUARD::QAR2(J)
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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).