MESON Chess Problem Database

Problem Display
PID: 242634 (3nbQ2/4R3/q7/2Np1Pp1/p2P1kp1/K1R3N1/4P2P/6b1 w - - 0 1)

Gockel, Hubert

Schach, 1981

3nbQ2/4R3/q7/2Np1Pp1/p2P1kp1/K1R3N1/4P2P/6b1

#2

10 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe2
      • 2.Sxe2#
    • 1...Qd3
      • 2.Sxd3#
    • 1...Qb7
      • 2.Sd3#
    • 1...Qc8
      • 2.Sd3#
    • 1...Qa5
      • 2.Sd3#
    • 1...Qb6
      • 2.Sd3#
    • 1...Qc6
      • 2.Sd3#
    • 1...Qf6
      • 2.Sd3#
    • 1...Qg6
      • 2.Sd3#
    • 1...Qh6
      • 2.Sd3#
    • 1...Qa7
      • 2.Sd3#
    • 1...Qa8
      • 2.Sd3#
    • 1...Bb5
      • 2.Sh5#
    • 1...Bh5
      • 2.Sxh5#
    • 1...Bc6
      • 2.Sh5#
    • 1...Bd7
      • 2.Sh5#
    • 1...Sc6
      • 2.Se6#
  • Tries
    • 1.Rxe8?
      • threat
        • 2.Sh5#
      • 1...Qf6
        • 2.Sd3#
      • 1...Qg6
        • 2.Sd3#
      • 1...Qh6
        • 2.Sd3#
      • 1...Sf7!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qe5#
      • 1...Qxe2
        • 2.Sxe2#
      • 1...Qxf6
        • 2.Sd3#
      • 1...Bxd4
        • 2.Qxd4#
      • 1...Qd6
        • 2.Qxd6#
      • 1...Qe6
        • 2.fxe6#
      • 1...Sc6
        • 2.Se6#
      • 1...Sf7
        • 2.Sh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 14
  • Sets
    • Q(g);XP(A)::S(E),XQ(g)
    • Q(g);N_GUARD,P_PINR(D)::S(G),XQ(g)
    • Q(g);N_GUARD::S(G)
    • B(i);N_GUARD::S(E)
    • B(i);N_GUARD::S(E),XB(i)
    • S(h);N_GUARD,S_CUTQ(g)::S(G)
  • Tries
    • Try
      • R(I);XB(i)
      • Threat
        • S(E)
      • Vars
        • Q(g);N_GUARD::S(G)
      • Refutation
        • S(h);
  • Actual
    • Q(J);
    • Threat
      • QAB1(J)
    • Vars
      • Q(g);XP(A)::S(E),XQ(g)
      • Q(g);N_GUARD,XQ(J)::S(G)
      • B(a);OGATE,XP(F)::QAR2(J),XB(a)
      • Q(g);N_GUARD,P_PINS(G)::QAB(J),XQ(g)
      • Q(g);OGATE::QAR(J)+P(H),XQ(g)
      • S(h);N_GUARD,S_CUTQ(g)::S(G)
      • S(h);S_CUTB(i)::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).