MESON Chess Problem Database

Problem Display
PID: 158011 (K1N1k2r/nQB2pp1/2pP1P2/1p2N2R/7q/8/8/3r4 w k - 0 1)

Lipton, Michael

29th Place=, 10. WCCT, 2016-2017

K1N1k2r/nQB2pp1/2pP1P2/1p2N2R/7q/8/8/3r4

#2

8 + 9

56 The Problemist 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Rxh8#
    • 1...Qf2
      • 2.Rxh8#
    • 1...Qg3
      • 2.Rxh8#
    • 1...Qg5
      • 2.Rxh8#
    • 1...Qxf6
      • 2.Rxh8#
    • 1...Qa4
      • 2.Rxh8#
    • 1...Qb4
      • 2.Rxh8#
    • 1...Qc4
      • 2.Rxh8#
    • 1...Qd4
      • 2.Rxh8#
    • 1...Qe4
      • 2.Rxh8#
    • 1...Qf4
      • 2.Rxh8#
    • 1...Qg4
      • 2.Rxh8#
    • 1...Sxc8
      • 2.Qxc8#
  • Tries
    • 1.Ba5?
      • threat
        • 2.Qe7#
        • 2.Qxf7#
      • 1...Kf8
        • 2.Qxf7#
      • 1...Qxf6
        • 2.Rxh8#
      • 1...Qxh5
        • 2.Qe7#
      • 1...Sxc8
        • 2.Qxc8#
        • 2.Qxf7#
      • 1...Qc4
        • 2.Rxh8#
        • 2.Qe7#
      • 1...Rf8
        • 2.Qd7#
        • 2.Qe7#
      • 1...0-0!
    • 1.Bb6?
      • threat
        • 2.Qe7#
        • 2.Qxf7#
      • 1...Kf8
        • 2.Qxf7#
      • 1...Qxf6
        • 2.Rxh8#
      • 1...Qxh5
        • 2.Qe7#
      • 1...Sxc8
        • 2.Qxc8#
        • 2.Qxf7#
      • 1...Qc4
        • 2.Rxh8#
        • 2.Qe7#
      • 1...Rf8
        • 2.Qd7#
        • 2.Qe7#
      • 1...0-0!
    • 1.Bd8?
      • threat
        • 2.Qe7#
      • 1...Kxd8
        • 2.Qd7#
      • 1...Kf8
        • 2.Qxf7#
      • 1...0-0
        • 2.Se7#
      • 1...Qxf6
        • 2.Rxh8#
      • 1...Sxc8!
    • 1.Qb8?
      • threat
        • 2.Sxa7#
      • 1...Kf8
        • 2.Sxa7#
      • 1...0-0
        • 2.Se7#
      • 1...Qxf6
        • 2.Rxh8#
      • 1...Rxd6
        • 2.Sxd6#
      • 1...Sxc8
        • 2.Qxc8#
      • 1...Qg4
        • 2.Rxh8#
      • 1...Qh3!
  • Keys
    • 1.Bb8!
      • threat
        • 2.Qe7#
      • 1...Kd8
        • 2.Qd7#
      • 1...Kf8
        • 2.Qxf7#
      • 1...0-0
        • 2.Se7#
      • 1...Qxf6
        • 2.Rxh8#
      • 1...Sxc8
        • 2.Qxc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 11
  • Sets
    • Q(b);N_GUARD::R(B),XR(i)
    • Q(b);N_GUARD,XP(D)::R(B),XR(i)
    • S(e);OGATE,XS(H)::QAR2(E),XS(e)
  • Tries
    • Try
      • B(F);
      • Threat
        • DUALS(2)
      • Vars
        • K(h);P-FLIGHT::QAR1(E),XP(f)
        • Q(b);N_GUARD,XP(D)::R(B),XR(i)
        • Q(b);XR(B)::QAR1(E)
      • Refutation
        • K(h);0-0,P_PINS(H)
    • Try
      • B(F);
      • Threat
        • DUALS(2)
      • Vars
        • K(h);P-FLIGHT::QAR1(E),XP(f)
        • Q(b);N_GUARD,XP(D)::R(B),XR(i)
        • Q(b);XR(B)::QAR1(E)
      • Refutation
        • K(h);0-0,P_PINS(H)
    • Try
      • B(F);
      • Threat
        • QAR1(E)
      • Vars
        • K(h);P-FLIGHT,XB(F)::QAR1(E)
        • K(h);P-FLIGHT::QAR1(E),XP(f)
        • K(h);0-0::S(H)
        • Q(b);N_GUARD,XP(D)::R(B),XR(i)
      • Refutation
        • S(e);XS(H)
    • Try
      • Q(E);
      • Threat
        • QAR(E)+S(H),XS(e)
      • Vars
        • K(h);P-FLIGHT::QAR(E)+S(H),XS(e)
        • K(h);0-0::S(H)
        • Q(b);N_GUARD,XP(D)::R(B),XR(i)
        • R(a);XP(C)::QAR(E)+S(H),DCHECK,XR(a)
        • S(e);OGATE,P_SPINS(e),XS(H)::QAR2(E),XS(e)
        • Q(b);N_GUARD::R(B),XR(i)
      • Refutation
        • Q(b);
  • Actual
    • B(F);
    • Threat
      • QAR1(E)
    • Vars
      • K(h);P-FLIGHT::QAR1(E)
      • K(h);P-FLIGHT::QAR1(E),XP(f)
      • K(h);0-0::S(H)
      • Q(b);N_GUARD,XP(D)::R(B),XR(i)
      • S(e);OGATE,XS(H)::QAR2(E),XS(e)
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