MESON Chess Problem Database

Problem Display
PID: 91339 (B1q2b2/5Pp1/2R1N1K1/2pN4/2p1kPQ1/r2bP1P1/8/3R4 w - - 0 1)

Zilahi, Zoltan

Die Schwalbe, 1949

B1q2b2/5Pp1/2R1N1K1/2pN4/2p1kPQ1/r2bP1P1/8/3R4

#2

11 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5+
      • 2.Qf5#
    • 1...Qxe6+
      • 2.Rxe6#
    • 1...Bb1
      • 2.Sg5#
    • 1...Bf1
      • 2.Sg5#
    • 1...Bc2
      • 2.Sg5#
    • 1...Be2
      • 2.Sg5#
  • Tries
    • 1.Rd6?
      • threat
        • 2.Sg5#
      • 1...Qxe6+
        • 2.Rxe6#
      • 1...Qd8
        • 2.Sxc5#
      • 1...Be7!
    • 1.Qh5?
      • threat
        • 2.Qh1#
      • 1...Qxe6+
        • 2.Rxe6#
      • 1...Bf1
        • 2.Sg5#
      • 1...Be2
        • 2.Sg5#
      • 1...Ra2!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qg2#
      • 1...Kxd5+
        • 2.e4#
      • 1...Qxe6+
        • 2.Rxe6#
      • 1...Bxe2
        • 2.Sg5#
      • 1...Ra2
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • K(d);CHECK,P_SPINB(b),S_FLIGHT,XS(F)::QAR2(E)
    • Q(g);CHECK,OGATE,XS(H)::R(G),XQ(g)
    • B(b);::S(H)
  • Tries
    • Try
      • R(G);
      • Threat
        • S(H)
      • Vars
        • Q(g);CHECK,OGATE,XS(H)::R(G),XQ(g)
        • Q(g);N_GUARD::S(H),XP(e)
      • Refutation
        • B(h);
    • Try
      • Q(E);
      • Threat
        • QAB(E)
      • Vars
        • Q(g);CHECK,OGATE,XS(H)::R(G),XQ(g)
        • B(b);::S(H)
      • Refutation
        • R(a);
  • Actual
    • Q(E);
    • Threat
      • QAB(E)
    • Vars
      • K(d);CHECK,OGATE,P_SPINB(b),S_FLIGHT,XS(F)::P(B)
      • Q(g);CHECK,OGATE,XS(H)::R(G),XQ(g)
      • B(b);XQ(E)::S(H)
      • R(a);N_GUARD::S(F)
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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).