MESON Chess Problem Database

Problem Display
PID: 75758 (r3k1N1/P1bnp1K1/1B6/3pp3/B7/3Q4/8/8 w q - 0 1)

Borodatov, Leonid

The Macedonian Problemist, 2007

r3k1N1/P1bnp1K1/1B6/3pp3/B7/3Q4/8/8

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rd8
      • 2.Qg6#
    • 1...Bd6
      • 2.Qg6#
    • 1...Bb8
      • 2.Qg6#
    • 1...Bd8
      • 2.Qg6#
    • 1...0-0-0
      • 2.Qa6#
  • Tries
    • 1.Qf1?
      • threat
        • 2.Qf8#
      • 1...0-0-0
        • 2.Qa6#
      • 1...Kd8!
    • 1.Qb5?
      • threat
        • 2.Qxd7#
      • 1...Kd8
        • 2.Qxd7#
      • 1...0-0-0
        • 2.Qa6#
      • 1...Rd8!
    • 1.Qf5?
      • threat
        • 2.Qxd7#
        • 2.Qf8#
      • 1...Kd8
        • 2.Qxd7#
      • 1...Rd8
        • 2.Qg6#
        • 2.Qh5#
        • 2.Qf7#
        • 2.Qf8#
      • 1...e6
        • 2.Qf8#
      • 1...0-0-0!
  • Keys
    • 1.Qxd5!
      • threat
        • 2.Qxd7#
      • 1...Kd8
        • 2.Qxd7#
      • 1...0-0-0
        • 2.Sxe7#
      • 1...Rd8
        • 2.Qf7#
      • 1...Bd6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(f);SBLOCK::QAB(A)
    • B(c);::QAB(A)
    • K(g);0-0-0,N_SPINS(d),OGATEB::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(g);0-0-0,N_SPINS(d),OGATEB::QAB(A)
      • Refutation
        • K(g);N_SPINS(d),P-FLIGHT,P_SPINB(c)
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XS(d)
      • Vars
        • K(g);N_SPINS(d),P-FLIGHT,P_SPINB(c)::QAR1(A),XS(d)
        • K(g);0-0-0,N_SPINS(d),OGATEB::QAB(A)
      • Refutation
        • R(f);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(g);N_SPINS(d),P-FLIGHT,P_SPINB(c)::QAR1(A),XS(d)
        • P(e);::QAR1(A)
      • Refutation
        • K(g);0-0-0
  • Actual
    • Q(A);XP(a)
    • Threat
      • QAB1(A),XS(d)
    • Vars
      • K(g);P-FLIGHT,P_SPINB(c)::QAR1(A),XS(d)
      • K(g);0-0-0,N_SPINS(d)::S(F),XP(e)
      • R(f);SBLOCK::QAB1(A)
      • B(c);::QAB1(A)
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