MESON Chess Problem Database

Problem Display
PID: 135834 (6R1/3K1p2/5k1p/3p3r/3P3p/5N1P/8/7Q w - - 0 1)

Nikitin, Aleksandr Olegovich

Mat Plus, 2009

6R1/3K1p2/5k1p/3p3r/3P3p/5N1P/8/7Q

#2

6 + 6

SOLUTION

  • SOUND
  • Tries
    • 1.Sg5?
      • threat
        • 2.Qf3#
        • 2.Qf1#
      • 1...Kf5
        • 2.Qf3#
        • 2.Qf1#
      • 1...Rxg5!
    • 1.Qb1?
      • 1...Re5
        • 2.dxe5#
      • 1...Rf5
        • 2.Qb6#
      • 1...Rg5!
    • 1.Qe1?
      • 1...Kf5
        • 2.Qe5#
      • 1...Re5
        • 2.Qxe5#
      • 1...Rf5
        • 2.Qe7#
      • 1...Rg5!
    • 1.Qh2?
      • 1...Kf5
        • 2.Qe5#
      • 1...Re5
        • 2.Qxe5#
      • 1...Rf5
        • 2.Qd6#
      • 1...Rg5!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Sg5#
      • 1...Kf5
        • 2.Sd2#
        • 2.Sg5#
      • 1...Re5
        • 2.Sxe5#
      • 1...Rf5
        • 2.Qa6#
      • 1...Rg5
        • 2.Sxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Refutation
        • R(c);XS(B)
    • Try
      • Q(A);
      • Vars
        • R(c);OGATE::P(D),XR(c)
        • R(c);SBLOCK::QAR(A)
      • Refutation
        • R(c);
    • Try
      • Q(A);
      • Vars
        • K(d);P-FLIGHT::QAR1(A)
        • R(c);N_GUARD::QAB1(A),XR(c)
        • R(c);SBLOCK::QAB1(A)
      • Refutation
        • R(c);
    • Try
      • Q(A);
      • Vars
        • K(d);P-FLIGHT::QAR1(A)
        • R(c);N_GUARD::QAB1(A),XR(c)
        • R(c);SBLOCK::QAR2(A)
      • Refutation
        • R(c);
  • Actual
    • Q(A);
    • Threat
      • QAR(A)+S(B)
    • Vars
      • R(c);N_GUARD::QAR(A)+S(B),XR(c)
      • R(c);SBLOCK::QAR(A)
      • R(c);::QAR(A)+S(B),XR(c)
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