MESON Chess Problem Database

Problem Display
PID: 15341 (n7/6Q1/1R6/n2pNK2/3k1p2/5P2/N4R2/4bB2 w - - 0 1)

Petkov, Petko Andonov

Shakhmatna misl, 1982

n7/6Q1/1R6/n2pNK2/3k1p2/5P2/N4R2/4bB2

#2

8 + 6

3840 Petkov Selected Compositions 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Sg4#
    • 1...Kc5
      • 2.Sd7#
  • Tries
    • 1.Sd3+?
      • 1...Ke3
        • 2.Re6#
        • 2.Qe5#
      • 1...Kc4!
    • 1.Sc6+?
      • 1...Ke3
        • 2.Qd4#
      • 1...Kc5!
    • 1.Rb5?
      • threat
        • 2.Sc4#
        • 2.Sg4#
      • 1...Ke3
        • 2.Sg4#
      • 1...Sc4
        • 2.Sxc4#
      • 1...Sc6!
    • 1.Rc6?
      • threat
        • 2.Sc4#
        • 2.Sg4#
      • 1...Ke3
        • 2.Sg4#
      • 1...Sc4
        • 2.Sxc4#
      • 1...Sxc6!
    • 1.Qa7?
      • threat
        • 2.Rb4#
      • 1...Ke3
        • 2.Rb3#
      • 1...Kc5
        • 2.Rc6#
      • 1...Sxb6
        • 2.Qxb6#
      • 1...Bb4
        • 2.Rxb4#
      • 1...Sc4!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Rd2#
      • 1...Ke3
        • 2.Re2#
      • 1...Kc5
        • 2.Rc2#
      • 1...Bxf2
        • 2.Qxf2#
      • 1...Bd2
        • 2.Rxd2#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::S(E)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(G);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);S_FLIGHT::S(E)
        • S(d);::QAB(H)+S(E),XS(d)
      • Refutation
        • S(d);
    • Try
      • R(G);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);S_FLIGHT::S(E)
        • S(d);::QAB(H)+S(E),XS(d)
      • Refutation
        • S(d);XR(G)
    • Try
      • Q(H);
      • Threat
        • QAB(H)+R(G),DCHECK
      • Vars
        • K(b);S_FLIGHT::QAB(H)+R(G),DCHECK
        • S(f);OGATE,P_SPINS(f),XR(G)::QAB(H),XS(f)
        • B(a);::QAB(H)+R(G),DCHECK,XB(a)
      • Refutation
        • S(d);
  • Actual
    • Q(H);
    • Threat
      • QAB(H)+R(C),DCHECK
    • Vars
      • K(b);S_FLIGHT::QAB(H)+R(C),DCHECK
      • B(a);OGATE,P_SPINB(a),XR(C)::QAB(H),XB(a)
      • B(a);::QAB(H)+R(C),DCHECK,XB(a)
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