MESON Chess Problem Database

Problem Display
PID: 10543 (8/4P1P1/1pN1N3/1RpP1P2/4k3/1P2n1PK/4Qb2/5R2 w - - 0 1)

Petkov, Petko Andonov

3rd Prize, Shakhmatna misl, 1965

8/4P1P1/1pN1N3/1RpP1P2/4k3/1P2n1PK/4Qb2/5R2

#2

12 + 5

3840 Petkov Selected Compositions 2000

SOLUTION

  • SOUND
  • Tries
    • 1.Rxf2?
      • 1...c4
        • 2.Sg5#
        • 2.Rf4#
      • 1...Kxd5!
    • 1.Qd3+?
      • 1...Kf3
        • 2.Se5#
        • 2.Sg5#
      • 1...Kxd3!
    • 1.e8Q?
      • 1...Kxd5
        • 2.Qd3#
      • 1...Kxf5
        • 2.Qf3#
      • 1...Be1
        • 2.Sc7#
      • 1...Bg1
        • 2.Sc7#
      • 1...c4
        • 2.Sed4#
      • 1...Bxg3!
    • 1.g8Q?
      • 1...Kxf5
        • 2.Qf3#
      • 1...Bxg3
        • 2.Sg5#
      • 1...Be1
        • 2.Sg5#
      • 1...Bg1
        • 2.Sg5#
      • 1...c4
        • 2.Qgg4#
      • 1...Kxd5!
  • Keys
    • 1.e8S!
      • 1...Kxd5
        • 2.Qf3#
      • 1...Kxf5
        • 2.Qd3#
      • 1...Bxg3
        • 2.Sf6#
      • 1...Be1
        • 2.Sf6#
      • 1...Bg1
        • 2.Sf6#
      • 1...c4
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);XB(a)
      • Refutation
        • K(c);N_SPINS(b),P_SPINP(d),S_FLIGHT,XP(G)
    • Try
      • Q(B);CHECK,N_PINS(b)
      • Refutation
        • K(c);S_FLIGHT,XQ(B)
    • Try
      • P(K);
      • Vars
        • K(c);N_SPINS(b),P_SPINP(d),S_FLIGHT,XP(G)::QAR2(B)
        • K(c);N_SPINS(b),P_SPINB(a),S_FLIGHT,XP(H)::QAR2(B)
        • B(a);::QAR(K)+S(J)
        • P(d);::QAR(K)+S(J)
      • Refutation
        • B(a);XP(D)
    • Try
      • P(L);
      • Vars
        • K(c);N_SPINS(b),P_SPINB(a),S_FLIGHT,XP(H)::QAR2(B)
        • B(a);XP(D)::S(J)
        • B(a);::S(J)
        • P(d);::QAR2(L)
      • Refutation
        • K(c);N_SPINS(b),P_SPINP(d),S_FLIGHT,XP(G)
  • Actual
    • P(K);
    • Vars
      • K(c);N_SPINS(b),P_SPINP(d),S_FLIGHT,XP(G)::QAB(B)
      • K(c);N_SPINS(b),P_SPINB(a),S_FLIGHT,XP(H)::QAB(B)
      • B(a);XP(D)::S(K)
      • B(a);::S(K)
      • P(d);::S(K)
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