MESON Chess Problem Database

Problem Display
PID: 162250 (bB6/1k2N3/Nn2K3/3R4/1n6/3B4/1R6/1Q6 w - - 0 1)

Lipton, Michael

The Problemist, 2016

bB6/1k2N3/Nn2K3/3R4/1n6/3B4/1R6/1Q6

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Rxb6#
      • 2.Rd7#
    • 1...Sc2
      • 2.Rxb6#
      • 2.Rd7#
    • 1...Sxd3
      • 2.Rxb6#
    • 1...Sxa6
      • 2.Rxb6#
    • 1...Sc6
      • 2.Rxb6#
      • 2.Rd7#
  • Tries
    • 1.Qc2?
      • threat
        • 2.Qc7#
      • 1...Sxc2
        • 2.Rd7#
      • 1...Sxd3
        • 2.Qc8#
      • 1...S4xd5
        • 2.Qc6#
        • 2.Qc8#
      • 1...Sxa6
        • 2.Qc8#
      • 1...S6xd5
        • 2.Qc6#
      • 1...Sc6
        • 2.Rd7#
        • 2.Qxc6#
      • 1...Sc4!
    • 1.Qc1?
      • threat
        • 2.Qc7#
      • 1...Sxd3
        • 2.Qc8#
      • 1...S4xd5
        • 2.Qc6#
        • 2.Qc8#
      • 1...Sxa6
        • 2.Qc8#
      • 1...S6xd5
        • 2.Qc6#
      • 1...Sc2
        • 2.Rd7#
      • 1...Sc6
        • 2.Rd7#
        • 2.Qxc6#
      • 1...Sc4!
    • 1.Qg1?
      • 1...Sxd3
        • 2.Rxb6#
        • 2.Qxb6#
      • 1...Sxa6
        • 2.Rxb6#
        • 2.Qxb6#
      • 1...S6xd5
        • 2.Qa7#
      • 1...Sc4
        • 2.Qa7#
      • 1...Sa2
        • 2.Rxb6#
        • 2.Rd7#
        • 2.Qxb6#
      • 1...Sc2
        • 2.Rxb6#
        • 2.Rd7#
        • 2.Qxb6#
      • 1...Sc6
        • 2.Rxb6#
        • 2.Rd7#
        • 2.Qxb6#
      • 1...Sa4
        • 2.Rd7#
        • 2.Qa7#
      • 1...Sd7
        • 2.Rxd7#
        • 2.Qa7#
      • 1...Sc8
        • 2.Rd7#
      • 1...S4xd5!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Rd7#
      • 1...Sxd3
        • 2.Ra5#
      • 1...S4xd5
        • 2.Qxd5#
      • 1...Sxa6
        • 2.Rd8#
      • 1...S6xd5
        • 2.Rxb4#
      • 1...Sa4
        • 2.Rd6#
      • 1...Sc4
        • 2.Rd6#
      • 1...Sd7
        • 2.Rd6#
      • 1...Sc8
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATE,P_SPINS(b),XB(C)::R1(B),XS(b)
    • S(a);OGATE,P_SPINS(b),XS(E)::R1(B),XS(b)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(a);P_SPINS(b),XQ(A)::R(D)
        • S(a);P_SPINS(b),XB(C)::QAB1(A)
        • S(a);P_SPINS(b),XS(E)::QAB1(A)
        • S(b);P_SPINS(a),XR(D)::QAB1(A)
      • Refutation
        • S(b);P_SPINS(a)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(a);P_SPINS(b),XB(C)::QAB1(A)
        • S(a);P_SPINS(b),XS(E)::QAB1(A)
        • S(b);P_SPINS(a),XR(D)::QAB1(A)
        • S(a);P_SPINS(b)::R(D)
      • Refutation
        • S(b);P_SPINS(a)
    • Try
      • Q(A);
      • Vars
        • S(b);OGATE,P_SPINS(a),XR(D)::QAR1(A)
        • S(b);OGATE,P_SPINS(a)::QAR1(A)
        • S(b);N_GUARD,P_SPINS(a)::R(D)
      • Refutation
        • S(a);P_SPINS(b),XR(D)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+R(D),DCHECK
    • Vars
      • S(a);N_GUARD,P_SPINS(b),XB(C)::QAB(A)+R(D)
      • S(a);OGATE,P_SPINS(a),XR(D)::QAB(A),XS(a)
      • S(a);N_GUARD,P_SPINS(b),XS(E)::QAB(A)+R(D)
      • S(b);OGATEB,P_SPINS(a),XR(D)::R(B),XS(a)
      • S(b);N_GUARD,P_SPINS(a)::QAB(A)+R(D)
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