MESON Chess Problem Database

Problem Display
PID: 162887 (3b1B2/1N1R4/Bpp2pQ1/r2p3K/1pPkPP2/p7/3P4/2N5 w - - 0 1)

Petkov, Petko Andonov

stern, 1992

(First published on Wed Jun 17 1992)

3b1B2/1N1R4/Bpp2pQ1/r2p3K/1pPkPP2/p7/3P4/2N5

#2

11 + 9

15601 Albrecht-Leiss-Degener Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Rxd5#
  • Tries
    • 1.Qg3?
      • threat
        • 2.Qd3#
        • 2.Qe3#
      • 1...Rxa6
        • 2.Qd3#
      • 1...Rb5
        • 2.Qd3#
      • 1...b5
        • 2.Qd3#
      • 1...Kxe4!
    • 1.e5?
      • threat
        • 2.Se2#
        • 2.Sb3#
        • 2.Qd3#
      • 1...Rxa6
        • 2.Qd3#
      • 1...Rb5
        • 2.Qd3#
      • 1...b5
        • 2.Qd3#
      • 1...b3
        • 2.Se2#
        • 2.Sxb3#
        • 2.Qd3#
      • 1...f5!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Qg1#
      • 1...dxc4+
        • 2.Sb5#
      • 1...dxe4+
        • 2.Sf5#
      • 1...Kc5
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(g);N_GUARD,S_CUTR(d)::R1(J),XP(e)
  • Tries
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);XB(G)::QAR1(H)
        • R(d);::QAR1(H)
        • P(f);::QAR1(H)
      • Refutation
        • K(c);N_SPINP(e),P-FLIGHT,XP(D)
    • Try
      • P(D);
      • Threat
        • DUALS(3)
      • Vars
        • R(d);XB(G)::QAR1(H)
        • R(d);::QAR1(H)
        • P(f);::QAR1(H)
      • Refutation
        • P(h);
  • Actual
    • S(I);N_PINP(e)
    • Threat
      • QAB(H)
    • Vars
      • P(e);CHECK,SBLOCK,XP(C)::R(J)+S(I),DCHECK
      • P(e);CHECK,SBLOCK,XP(D)::R(J)+S(I),DCHECK
      • K(c);S_FLIGHT::S(A)
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