MESON Chess Problem Database

Problem Display
PID: 7779 (3r4/2NP1p2/PP5Q/RKN1k3/PPP3p1/3Bb1Pn/8/6B1 w - - 0 1)

Kopaev, Viacheslav Georgievich

2nd HM., The Problemist, 1993

3r4/2NP1p2/PP5Q/RKN1k3/PPP3p1/3Bb1Pn/8/6B1

#2

14 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qf6#
  • Tries
    • 1.Kc6?
      • threat
        • 2.Qd6#
      • 1...Kd4
        • 2.Qf6#
      • 1...Bxh6
        • 2.Se4#
      • 1...f6
        • 2.Qxe3#
      • 1...Rxd7!
    • 1.Qg7+?
      • 1...Kd6
        • 2.Qf6#
      • 1...f6!
    • 1.Qe6+?
      • 1...Kd4
        • 2.Qf6#
      • 1...fxe6!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qf6#
      • 1...Kd4
        • 2.Qd6#
      • 1...Kf5
        • 2.Qf6#
      • 1...Bxh6
        • 2.Kc6#
      • 1...Bg5
        • 2.Kc6#
      • 1...f6
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(d);P_SPINB(a),S_FLIGHT::QAB(L)
  • Tries
    • Try
      • K(H);S_FLIGHT
      • Threat
        • QAB1(L)
      • Vars
        • K(d);P_SPINB(a),S_FLIGHT::QAB(L)
        • B(a);N_GUARD,XQ(L)::R(G)+S(I)
        • P(e);SBLOCK::QAR2(L),XB(a)
      • Refutation
        • R(f);XP(N)
    • Try
      • Q(L);CHECK
      • Vars
        • K(d);S_FLIGHT::QAR2(L)
      • Refutation
        • P(e);P_SPINP(e)
    • Try
      • Q(L);CHECK
      • Vars
        • K(d);P_SPINB(a),S_FLIGHT::QAB(L)
      • Refutation
        • P(e);XQ(L)
  • Actual
    • S(I);
    • Threat
      • QAB1(L)
    • Vars
      • K(d);P_SPINB(a),S_FLIGHT::QAR2(L)
      • K(d);P-FLIGHT::QAR1(L)
      • B(a);N_GUARD,XQ(L)::R(G)+K(H)
      • B(a);N_GUARD::R(G)+K(H)
      • P(e);::QAB1(L),XP(e)
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