MESON Chess Problem Database

Problem Display
PID: 164473 (8/1p6/3Bk1K1/2QpN3/6pb/1rp5/B3p2q/8 w - - 0 1)

Chernyavsky, Mykola Vasilovich

Novitski, Petr Adrinovich

4th HM., StrateGems, 2015

8/1p6/3Bk1K1/2QpN3/6pb/1rp5/B3p2q/8

#2

5 + 9

145 StrateGems 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Bxd5#
      • 2.Qxd5#
    • 1...Rb2
      • 2.Bxd5#
      • 2.Qxd5#
    • 1...Ra3
      • 2.Bxd5#
      • 2.Qxd5#
    • 1...Rb4
      • 2.Bxd5#
      • 2.Qxd5#
    • 1...Rb5
      • 2.Bxd5#
    • 1...Rb6
      • 2.Bxd5#
      • 2.Qxd5#
    • 1...d4
      • 2.Bxb3#
  • Tries
    • 1.Sf7?
      • threat
        • 2.Qc8#
      • 1...Qxd6
        • 2.Qxd6#
      • 1...d4
        • 2.Qf5#
      • 1...Kd7!
    • 1.Bb8?
      • threat
        • 2.Qd6#
      • 1...Rb6
        • 2.Bxd5#
      • 1...Be7
        • 2.Qc8#
      • 1...Qxe5!
    • 1.Qc7?
      • threat
        • 2.Qd7#
      • 1...d4
        • 2.Bxb3#
      • 1...Qxe5!
  • Keys
    • 1.Bf8!
      • threat
        • 2.Qd6#
      • 1...Kxe5
        • 2.Qe3#
      • 1...Qxe5
        • 2.Qc8#
      • 1...Rb6
        • 2.Qxd5#
      • 1...Be7
        • 2.Qxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(c);OGATE,P_SPINP(g)::B(A),XP(g)
    • P(g);OGATEB,P_SPINR(c)::B(A),XR(c)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB(B)
      • Vars
        • Q(b);OGATE,XB(D)::QAR1(B),XQ(b)
        • P(g);OGATE,P_SPINR(c)::QAB1(B)
      • Refutation
        • K(h);S_FLIGHT
    • Try
      • B(D);
      • Threat
        • QAR1(B)
      • Vars
        • R(c);OGATE,P_SPINP(g)::B(A),XP(g)
        • B(f);SBLOCK::QAB(B)
      • Refutation
        • Q(b);XS(C)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • P(g);OGATEB,P_SPINR(c)::B(A),XR(c)
      • Refutation
        • Q(b);XS(C)
  • Actual
    • B(D);
    • Threat
      • QAR1(B)
    • Vars
      • K(h);OGATEB,P-FLIGHT,P_SPINP(g),XS(C)::QAR2(B)
      • Q(b);SBLOCK,XS(C)::QAB(B)
      • R(c);P_SPINP(g)::QAB1(B),XP(g)
      • B(f);N_GUARD::QAR1(B),XB(f)
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