MESON Chess Problem Database

Problem Display
PID: 63081 (3RK3/Q1p5/2Pb1p2/1Rp1kB2/1N2N1P1/1P2qpp1/2p5/2B5 w - - 0 1)

Kniest, Peter

Die Schwalbe, 1972

3RK3/Q1p5/2Pb1p2/1Rp1kB2/1N2N1P1/1P2qpp1/2p5/2B5

#2

11 + 9

3753 FIDE Album (1971-1973) 1978

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qxc5#
    • 1...Kf4
      • 2.Sd3#
    • 1...Qf4
      • 2.Bb2#
      • 2.Qa1#
    • 1...Qg5
      • 2.Qa1#
    • 1...Qh6
      • 2.Qa1#
    • 1...Qe2
      • 2.Qa1#
  • Tries
    • 1.Qa1+?
      • 1...Kf4
        • 2.Sd3#
        • 2.Sd5#
      • 1...Qc3
        • 2.Qxc3#
      • 1...Qd4!
  • Keys
    • 1.Sxc5!
      • threat
        • 2.Scd3#
      • 1...Kd4+
        • 2.Se4#
      • 1...Kf4+
        • 2.Se6#
      • 1...Qxc5
        • 2.Qa1#
      • 1...Bxc5
        • 2.Qxc7#
      • 1...Qd3
        • 2.Scxd3#
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • K(f);P_PINS(D),P_SPINB(g),S_FLIGHT::QAB1(I),XP(e)
    • K(f);N_SPINP(e),P_PINS(D),P_SPINQ(b),S_FLIGHT::S(C)
    • Q(b);N_GUARD::QAB(I)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::QAB(I),XQ(b)
      • Refutation
        • Q(b);P_SPINQ(b)
  • Actual
    • S(D);XP(e)
    • Threat
      • R(F)+S(D),DCHECK
    • Vars
      • K(f);CHECK,P_SPINB(g),S_FLIGHT::QAB(I)+S(D)
      • K(f);CHECK,P_SPINQ(b),S_FLIGHT::S(D)
      • Q(b);N_GUARD,P_SPINQ(b),XS(D)::QAB(I)
      • B(g);OGATEB,P_SPINB(g),XS(D)::QAB(I),XP(i)
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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).