MESON Chess Problem Database

Problem Display
PID: 147943 (5B2/3B2Q1/K3Nn1q/3k3r/2N2p2/1Pp2P2/3pn3/3RRb2 w - - 0 1)

Toth, Julius

Die Schwalbe, 1931

5B2/3B2Q1/K3Nn1q/3k3r/2N2p2/1Pp2P2/3pn3/3RRb2

#2

10 + 9

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Sb6#
    • 1...Sd4
      • 2.Sc7#
    • 1...Se4
      • 2.Sb6#
    • 1...Sg4
      • 2.Sb6#
    • 1...Sxd7
      • 2.Qxd7#
    • 1...Sh7
      • 2.Sb6#
    • 1...Se8
      • 2.Sb6#
    • 1...Sg8
      • 2.Sb6#
  • Tries
    • 1.Bc6+?
      • 1...Kxc6
        • 2.Qb7#
      • 1...Kxe6!
    • 1.Rxd2+?
      • 1...Sd4
        • 2.Sc7#
        • 2.Rxd4#
      • 1...cxd2!
    • 1.Rxe2?
      • threat
        • 2.Sb6#
      • 1...Sxd7
        • 2.Qxd7#
      • 1...Bxe2!
  • Keys
    • 1.Ra1!
      • threat
        • 2.Ra5#
      • 1...Sxd7
        • 2.Qxd7#
      • 1...Sd4
        • 2.Sc7#
      • 1...Se4
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • R(g);SBLOCK::S(E)
    • S(c);N_SPINP(b),P_PINS(E),SBLOCK::S(G)
    • S(h);P_PINS(G)::S(E)
    • S(h);OGATE,P_PINS(G),XB(H)::QAR2(I),XS(h)
  • Tries
    • Try
      • B(H);CHECK
      • Vars
        • K(f);N_SPINP(b),S_FLIGHT,XB(H)::QAB1(I)
      • Refutation
        • K(f);N_SPINP(b),P_SPINS(c),S_FLIGHT,XS(G)
    • Try
      • R(A);CHECK,XP(b)
      • Refutation
        • P(d);XR(A)
    • Try
      • R(B);XS(c)
      • Threat
        • S(E)
      • Vars
        • S(h);OGATE,P_PINS(G),XB(H)::QAR2(I),XS(h)
      • Refutation
        • B(a);P_PINS(E),XR(B)
  • Actual
    • R(A);N_PINP(b)
    • Threat
      • R(A)
    • Vars
      • S(h);OGATE,P_PINS(G),XB(H)::QAR2(I),XS(h)
      • S(c);P_PINS(E),SBLOCK::S(G)
      • S(h);P_PINS(G)::S(E)
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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).