MESON Chess Problem Database

Problem Display
PID: 140831 (7b/1KpN4/2P1p1Q1/2Nkq3/1R3p2/BPprp2B/8/8 w - - 0 1)

Sibinovski, Zoran

Liga Problemista, 1985/2

7b/1KpN4/2P1p1Q1/2Nkq3/1R3p2/BPprp2B/8/8

#2

9 + 9

6490 yacpdb 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Qxe6#
    • 1...Qd6
      • 2.Qe4#
    • 1...Qg7
      • 2.Qxe6#
    • 1...Qg5
      • 2.Qxe6#
    • 1...Qh5
      • 2.Qxe6#
  • Tries
    • 1.Bxe6+?
      • 1...Qxe6
        • 2.Qxe6#
      • 1...Kd6!
    • 1.Rd4+?
      • 1...Kxd4
        • 2.Qxd3#
      • 1...Qxd4
        • 2.Qxe6#
      • 1...Rxd4!
    • 1.Rb5?
      • threat
        • 2.Sxe6#
      • 1...Kd4
        • 2.Qxd3#
      • 1...Kd6
        • 2.Se4#
      • 1...Qd4
        • 2.Qxe6#
      • 1...Qd6
        • 2.Qe4#
      • 1...Qf5!
  • Keys
    • 1.Sxe6!
      • threat
        • 2.Rb5#
      • 1...Kd6
        • 2.Rd4#
      • 1...Qxe6
        • 2.Qxe6#
      • 1...Qd4
        • 2.Sxc7#
      • 1...Qd6
        • 2.Qe4#
      • 1...Qf5
        • 2.Sxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(f);N_GUARD::QAB1(G),XP(g)
    • Q(f);N_GUARD,SBLOCK::QAB1(G)
  • Tries
    • Try
      • B(C);CHECK,XP(g)
      • Vars
        • Q(f);OGATE,XB(C)::QAB1(G),XQ(f)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(e);P-FLIGHT,XR(D)::QAR1(G),XR(b)
        • Q(f);SBLOCK,XR(D)::QAB1(G),XP(g)
      • Refutation
        • R(b);XR(D)
    • Try
      • R(D);
      • Threat
        • R(D)+S(E),XP(g)
      • Vars
        • K(e);P-FLIGHT::QAR1(G),XR(b)
        • K(e);P-FLIGHT,P_SPINP(g)::B(A)+S(E),DCHECK
        • Q(f);N_GUARD,SBLOCK::QAB1(G),XP(g)
        • Q(f);N_GUARD,SBLOCK::QAB1(G)
      • Refutation
        • Q(f);
  • Actual
    • S(E);XP(g)
    • Threat
      • R(D)
    • Vars
      • K(e);P-FLIGHT::B(A)+R(D),DCHECK
      • Q(f);OGATE,XS(E)::QAB1(G),XQ(f)
      • Q(f);N_GUARD::S(E),XP(h)
      • Q(f);N_GUARD,SBLOCK::QAB1(G)
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