MESON Chess Problem Database

Problem Display
PID: 242647 (1B6/6Rq/1p2P2Q/p2k4/2R1r3/1PpNp1n1/2K1N1nr/4b2B w - - 0 1)

Gockel, Hubert

Stern, 1983

1B6/6Rq/1p2P2Q/p2k4/2R1r3/1PpNp1n1/2K1N1nr/4b2B

#2

10 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Rd7#
    • 1...Qg8
      • 2.Rd7#
    • 1...Qh8
      • 2.Rd7#
    • 1...Rf4
      • 2.Sxf4#
    • 1...Re5
      • 2.Sf4#
    • 1...Rxe6
      • 2.Sf4#
    • 1...Bf2
      • 2.Sxc3#
    • 1...Sf4
      • 2.Sxf4#
    • 1...Sh4
      • 2.Sf4#
    • 1...a4
      • 2.Sb4#
    • 1...b5
      • 2.Rc5#
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qd6#
      • 1...Kxe6
        • 2.Qf7#
      • 1...Rxc4
        • 2.Qxc4#
      • 1...Rxf4
        • 2.Sxf4#
      • 1...Rxe6
        • 2.Qd4#
      • 1...Sxf4
        • 2.Sxf4#
      • 1...Rd4
        • 2.Qe5#
      • 1...Re5
        • 2.Qxe5#
      • 1...Sf5
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • Q(k);N_GUARD::R(I)
    • R(g);N_GUARD,P_PINS(E),P_SPINS(b)::S(C),XR(g)
    • R(g);N_GUARD,P_PINS(E),P_SPINS(b)::S(C)
    • R(g);N_GUARD,P_PINS(E),P_SPINS(b),XP(G)::S(C)
    • B(a);N_GUARD::S(C),XP(d)
    • S(b);N_GUARD,P_PINS(C),P_SPINR(g)::S(E),XS(b)
    • S(b);N_GUARD,P_PINS(C),P_SPINR(g)::S(E)
    • P(h);N_GUARD::S(E)
    • P(j);N_GUARD::R1(F)
  • Actual
    • Q(H);
    • Threat
      • QAR1(H)
    • Vars
      • K(i);OGATEB,S_FLIGHT,XP(G)::QAB1(H)
      • R(g);OGATE,P_PINS(E),P_SPINS(b),XR(F)::QAB1(H),XR(g)
      • R(g);P_PINS(E),P_SPINS(b),XQ(H)::S(C),XR(g)
      • R(g);OGATE,P_PINS(E),P_SPINS(b),SBLOCK,XP(G)::QAR1(H)
      • S(b);P_PINS(C),P_SPINR(g),XQ(H)::S(E),XS(b)
      • R(g);N_GUARD,P_PINS(E),P_SPINS(b)::QAR1(H)
      • R(g);N_GUARD,P_PINS(E),P_SPINS(b)::QAR1(H),XR(g)
      • S(f);N_GUARD,S_CUTQ(k)::QAB1(H),XR(g)
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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).