MESON Chess Problem Database

Problem Display
PID: 275546 (q1R3B1/b2p4/2b1r3/1N5Q/P1kP4/B1p3P1/2P3N1/2n4K w - - 0 1)

Chernyavsky, Mykola Vasilovich

Derevchuk, Oleksandr Andrinovich

Problemist Ukraini, 2023

q1R3B1/b2p4/2b1r3/1N5Q/P1kP4/B1p3P1/2P3N1/2n4K

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd4
      • 2.Sd6#
    • 1...Bc5
      • 2.Qxc5#
    • 1...Bb8
      • 2.Qc5#
  • Tries
    • 1.Kh2?
      • threat
        • 2.Se3#
      • 1...Bxd4
        • 2.Sd6#
      • 1...d5!
    • 1.Bxe6+?
      • 1...d5
        • 2.Se3#
        • 2.Bxd5#
        • 2.Qxd5#
      • 1...dxe6!
    • 1.Rxc6+?
      • 1...Bc5
        • 2.Se3#
        • 2.Rxc5#
        • 2.Qxc5#
      • 1...dxc6
        • 2.Se3#
        • 2.Bxe6#
      • 1...Qxc6!
    • 1.Qe5?
      • threat
        • 2.Sd6#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Bb8
        • 2.Qc5#
      • 1...d5
        • 2.Se3#
      • 1...d6
        • 2.Sxd6#
      • 1...Qb8!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Se3#
      • 1...Bxd4
        • 2.Sd6#
      • 1...d5
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • B(f);SBLOCK,XP(G)::S(H)
    • B(f);N_GUARD,N_SPINB(d)::QAR1(I),XB(f)
    • B(f);N_GUARD::QAR1(I)
  • Tries
    • Try
      • K(A);N_SPINS(C),P-FLIGHT
      • Threat
        • S(C)
      • Vars
        • B(f);SBLOCK,XP(G)::S(H)
      • Refutation
        • P(g);N_SPINR(e)
    • Try
      • B(K);CHECK,XR(e)
      • Refutation
        • P(g);XB(K)
    • Try
      • R(J);CHECK,N_SPINS(C),XB(d)
      • Refutation
        • Q(h);P_PINS(C),XR(J)
    • Try
      • Q(I);
      • Threat
        • S(H)
      • Vars
        • B(f);N_GUARD,N_SPINB(d)::QAR1(I),XB(f)
        • B(f);N_GUARD::QAR1(I)
        • P(g);N_PINS(C),N_SPINR(e)::S(C)
        • P(g);::S(H),XP(g)
      • Refutation
        • Q(h);
  • Actual
    • Q(I);N_SPINS(C)
    • Threat
      • S(C)
    • Vars
      • B(f);SBLOCK,XP(G)::S(H)
      • P(g);N_SPINR(e),SBLOCK::QAR1(I),XP(b)
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