MESON Chess Problem Database

Problem Display
PID: 163945 (3K4/8/3QR3/4B2p/6pk/4N3/8/8 w - - 0 1)

Pilchenko, Viacheslav Karlovich

Sp. Prize, StrateGems, 2014

3K4/8/3QR3/4B2p/6pk/4N3/8/8

#2

5 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kg5
      • 2.Qe7#
  • Tries
    • 1.Bg3+?
      • 1...Kg5
        • 2.Re5#
        • 2.Rg6#
        • 2.Qf4#
        • 2.Qc5#
        • 2.Qe5#
        • 2.Qe7#
        • 2.Qd5#
      • 1...Kh3!
    • 1.Rh6?
      • 1...Kh3
        • 2.Rxh5#
      • 1...Kg5
        • 2.Qf6#
      • 1...g3!
    • 1.Qb4?
      • 1...Kg5
        • 2.Qe7#
      • 1...Kh3!
    • 1.Qd5?
      • 1...Kh3
        • 2.Qh1#
      • 1...Kg5
        • 2.Bg3#
      • 1...g3!
  • Keys
    • 1.Bh2!
      • 1...Kh3
        • 2.Qg3#
      • 1...Kg5
        • 2.Qe7#
      • 1...g3
        • 2.Qxg3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAB(C)
  • Tries
    • Try
      • B(B);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(D);P_PINP(c)
      • Vars
        • K(b);P-FLIGHT::R(D),XP(c)
        • K(b);N_SPINP(c),S_FLIGHT::QAB1(C)
      • Refutation
        • P(a);
    • Try
      • Q(C);P_PINP(a)
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::QAB(C)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(b);P-FLIGHT::QAR2(C)
        • K(b);S_FLIGHT::QAR(C)+B(B)
      • Refutation
        • P(a);
  • Actual
    • B(B);
    • Vars
      • K(b);P-FLIGHT::QAR1(C)
      • K(b);S_FLIGHT::QAB(C)
      • P(a);::QAB1(C),XP(a)
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