MESON Chess Problem Database

Problem Display
PID: 15981 (1R2K3/p7/k3N3/2R2p2/1p5n/3br3/3qQ3/8 w - - 0 1)

Ewald, Kurt

Die Schwalbe, 2000

1R2K3/p7/k3N3/2R2p2/1p5n/3br3/3qQ3/8

#2

5 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Qa2#
    • 1...Qa2
      • 2.Qxa2#
    • 1...Rf3
      • 2.Sc7#
    • 1...Rg3
      • 2.Sc7#
    • 1...Rh3
      • 2.Sc7#
    • 1...Rxe6+
      • 2.Qxe6#
    • 1...Bc4
      • 2.Qxc4#
    • 1...Bb5+
      • 2.Qxb5#
  • Tries
    • 1.Kf8?
      • threat
        • 2.Sc7#
      • 1...Rxe6
        • 2.Qxe6#
      • 1...Bb5
        • 2.Qxb5#
      • 1...Sg6+!
    • 1.Qxd3+?
      • 1...Rxd3
        • 2.Sc7#
      • 1...Qxd3!
  • Keys
    • 1.Kf7!
      • threat
        • 2.Sc7#
      • 1...Rxe6
        • 2.Qxe6#
      • 1...Bb5
        • 2.Qxb5#
      • 1...Qa2
        • 2.Qxa2#
      • 1...Bc4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • Q(a);OGATE::QAR(A)
    • Q(a);OGATE::QAR(A),XQ(a)
    • R(c);N_PINS(C)::S(C)
    • R(c);CHECK,OGATE,XS(C)::QAR(A),XR(c)
    • B(b);OGATE::QAB(A),XB(b)
    • B(b);CHECK,OGATE::QAB1(A),XB(b)
  • Tries
    • Try
      • K(E);N_SPINS(C),P-FLIGHT
      • Threat
        • S(C)
      • Vars
        • R(c);OGATE,XS(C)::QAR(A),XR(c)
        • B(b);OGATE::QAB1(A),XB(b)
      • Refutation
        • S(e);CHECK
    • Try
      • Q(A);CHECK,XB(b)
      • Vars
        • R(c);N_PINS(C),XQ(A)::S(C)
      • Refutation
        • Q(a);XQ(A)
  • Actual
    • K(E);N_SPINS(C),S_FLIGHT
    • Threat
      • S(C)
    • Vars
      • R(c);OGATE,XS(C)::QAR(A),XR(c)
      • B(b);OGATE::QAB1(A),XB(b)
      • Q(a);OGATE,P_PINS(C)::QAR(A),XQ(a)
      • B(b);OGATE,P_PINS(C)::QAB(A),XB(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).