MESON Chess Problem Database

Problem Display
PID: 98484 (8/4B3/b2K4/2QP2P1/Rq3kp1/5pN1/3b1P2/2N5 w - - 0 1)

Petkov, Petko Andonov

Problemas, 1963

8/4B3/b2K4/2QP2P1/Rq3kp1/5pN1/3b1P2/2N5

#2

9 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Sd3#
    • 1...Qd4
      • 2.Rxd4#
      • 2.Qxd4#
    • 1...Qe4
      • 2.Rxe4#
    • 1...Bd3
      • 2.Sxd3#
    • 1...Bb7
      • 2.Sd3#
    • 1...Bc8
      • 2.Sd3#
  • Tries
    • 1.Ke6?
      • threat
        • 2.Qd6#
        • 2.Qc7#
      • 1...Qe4+
        • 2.Rxe4#
      • 1...Bc3
        • 2.Qe3#
      • 1...Bc4
        • 2.Qd4#
      • 1...Bc8+!
    • 1.Rxb4+?
      • 1...Bc4
        • 2.Sd3#
        • 2.Rxc4#
        • 2.Qd4#
        • 2.Qxc4#
      • 1...Bxb4!
    • 1.Qxb4+?
      • 1...Bc4
        • 2.Sd3#
        • 2.Qxd2#
        • 2.Qxc4#
      • 1...Bxb4+!
  • Keys
    • 1.Kc7!
      • threat
        • 2.Qd6#
      • 1...Ke5
        • 2.Bd6#
      • 1...Qc4
        • 2.Sd3#
      • 1...Bc3
        • 2.Qe3#
      • 1...Bc4
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(c);N_PINQ(E),S_CUTB(f)::S(A)
    • Q(c);N_PINQ(E),OGATE::R1(D),XQ(c)
    • B(f);N_GUARD::S(A),XB(f)
    • B(f);N_GUARD::S(A)
  • Tries
    • Try
      • K(H);N_SPINQ(E),P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);CHECK,OGATE::R1(D),XQ(c)
        • B(a);N_GUARD::QAB1(E)
        • B(f);N_SPINQ(c),P_PINP(F),S_CUTQ(c)::QAR2(E)
      • Refutation
        • B(f);CHECK
    • Try
      • R(D);CHECK,N_SPINQ(E),XQ(c)
      • Refutation
        • B(a);P_PINQ(E),XR(D)
    • Try
      • Q(E);CHECK,N_SPINQ(E),XQ(c)
      • Refutation
        • B(a);CHECK,P_SPINB(a),XQ(E)
  • Actual
    • K(H);N_SPINQ(E),S_FLIGHT
    • Threat
      • QAB(E)
    • Vars
      • K(d);N_SPINQ(c),S_FLIGHT::B(I)
      • Q(c);P_PINQ(E),S_CUTB(f)::S(A)
      • B(a);N_GUARD::QAB1(E)
      • B(f);N_SPINQ(c),S_CUTQ(c)::QAR2(E)
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