MESON Chess Problem Database

Problem Display
PID: 188471 (4RR1n/4bpBB/2K1p1q1/1p2N3/2QNk3/2np2P1/3r1P2/7b w - - 0 1)

Gockel, Hubert

The Problemist, 1980

4RR1n/4bpBB/2K1p1q1/1p2N3/2QNk3/2np2P1/3r1P2/7b

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Sxb5#
    • 1...Ra2
      • 2.Qxd3#
    • 1...Rb2
      • 2.Qxd3#
    • 1...Rc2
      • 2.Qxd3#
    • 1...Re2
      • 2.Qxd3#
    • 1...Rxf2
      • 2.Qxd3#
    • 1...f5
      • 2.Sxb5#
  • Tries
    • 1.Sdf3+?
      • 1...Kf5
        • 2.Qf4#
        • 2.Qg4#
        • 2.g4#
      • 1...bxc4!
    • 1.Bxg6+?
      • 1...fxg6
        • 2.Sxb5#
        • 2.Rf4#
      • 1...f5
        • 2.Sxb5#
      • 1...Sxg6!
  • Keys
    • 1.Qxe6!
      • threat
        • 2.Sxf7#
      • 1...Kxd4+
        • 2.Sf3#
      • 1...fxe6
        • 2.Rf4#
      • 1...Bd6
        • 2.Qg4#
      • 1...Bf6
        • 2.Qg4#
      • 1...f5
        • 2.Sxg6#
      • 1...f6
        • 2.Sef3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • Q(h);::QAR(C)+S(D),XP(f)
    • R(b);N_GUARD::QAB1(C),XP(d)
    • R(b);N_GUARD,XP(A)::QAB1(C),XP(d)
    • P(j);N_SPINQ(h)::QAR(C)+S(D),XP(f)
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • P(f);XQ(C)
    • Try
      • B(H);CHECK,XQ(h)
      • Vars
        • P(j);P_SPINP(j)::QAR(C)+S(D),XP(f)
      • Refutation
        • S(k);XB(H)
  • Actual
    • Q(C);P_SPINQ(C),XP(g)
    • Threat
      • QAR(C)+S(E),XP(j)
    • Vars
      • K(e);CHECK,N_SPINQ(h),P-FLIGHT,XS(D)::B(G)+S(E),DCHECK
      • P(j);OGATE,XQ(C)::R1(J)
      • B(i);N_PINQ(C)::QAR2(C)
      • P(j);N_GUARD,N_SPINQ(h)::QAR(C)+S(E),XQ(h)
      • P(j);N_GUARD,N_PINQ(C)::QAR(C)+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).