MESON Chess Problem Database

Problem Display
PID: 140223 (8/2pK2Q1/4p2p/1ppk4/1q1p1R2/B5N1/1PP3R1/7B w - - 0 1)

Skrinnik, Oleksandr Petrovich

Probleemblad, 1975

8/2pK2Q1/4p2p/1ppk4/1q1p1R2/B5N1/1PP3R1/7B

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Rg1#
      • 2.Rd2#
      • 2.Re2#
      • 2.Rgf2#
      • 2.Rh2#
    • 1...c4
      • 2.Qxd4#
    • 1...e5
      • 2.Qf7#
      • 2.Qg8#
  • Tries
    • 1.Qe5+?
      • 1...Kc4
        • 2.Qxe6#
      • 1...Kxe5!
    • 1.Qf6?
      • threat
        • 2.Qxe6#
      • 1...Kc4
        • 2.Qxe6#
      • 1...c4
        • 2.Qxd4#
      • 1...e5
        • 2.Qe6#
        • 2.Qf7#
      • 1...Qe1!
    • 1.Qf7?
      • threat
        • 2.Qxe6#
      • 1...Kc4
        • 2.Qxe6#
      • 1...Ke5
        • 2.Re2#
      • 1...c4
        • 2.Rf5#
      • 1...Qe1!
    • 1.c4+?
      • 1...Qxc4
        • 2.Rg1#
        • 2.Rc2#
        • 2.Rd2#
        • 2.Re2#
        • 2.Rgf2#
        • 2.Rh2#
      • 1...bxc4
        • 2.Rg1#
        • 2.Rc2#
        • 2.Rd2#
        • 2.Re2#
        • 2.Rgf2#
        • 2.Rh2#
      • 1...dxc4 ep
        • 2.Rd2#
      • 1...Kxc4!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qxe6#
      • 1...Kc4
        • 2.Qxe6#
      • 1...Ke5
        • 2.Rf5#
      • 1...Qe1
        • 2.Qxc5#
      • 1...c4
        • 2.Re2#
      • 1...e5
        • 2.Qe6#
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(d);N_GUARD,S_CUTQ(a)::QAR1(I),XP(b)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • K(e);P_SPINP(b),S_FLIGHT::QAB(I),XP(f)
      • Refutation
        • K(e);P-FLIGHT,XQ(I)
    • Try
      • Q(I);
      • Threat
        • QAB1(I),XP(f)
      • Vars
        • K(e);P_SPINP(b),S_FLIGHT::QAB(I),XP(f)
        • P(d);N_GUARD,S_CUTQ(a)::QAR1(I),XP(b)
      • Refutation
        • Q(a);
    • Try
      • Q(I);P_PINP(f)
      • Threat
        • QAB1(I),XP(f)
      • Vars
        • K(e);N_SPINP(f),P_SPINP(b),S_FLIGHT::QAB(I),XP(f)
        • K(e);N_SPINP(f),P-FLIGHT::R(D)
        • P(d);SBLOCK::R(G)
      • Refutation
        • Q(a);
    • Try
      • P(C);CHECK
      • Vars
        • P(b);EP,XP(C)::B(A)+R(D),DCHECK
      • Refutation
        • K(e);P_SPINP(b),S_FLIGHT,XP(C)
  • Actual
    • Q(I);
    • Threat
      • QAB1(I),XP(f)
    • Vars
      • K(e);P_SPINP(b),S_FLIGHT::QAB(I),XP(f)
      • K(e);P-FLIGHT,P_SPINP(f)::R1(G)
      • Q(a);N_GUARD::QAR1(I),XP(d)
      • P(d);SBLOCK::B(A)+R(D)
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