MESON Chess Problem Database

Problem Display
PID: 143326 (6K1/8/5N2/R3Pk1p/Q4B2/3R4/p1B5/1q6 w - - 0 1)

Lipton, Michael

The Problemist, 2011

6K1/8/5N2/R3Pk1p/Q4B2/3R4/p1B5/1q6

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qd7#
    • 1...Kg6
      • 2.Rg3#
      • 2.Qe4#
    • 1...Qa1
      • 2.Rd6#
    • 1...Qb6
      • 2.Rd6#
  • Tries
    • 1.Kf7?
      • threat
        • 2.Qe4#
      • 1...Qb3+
        • 2.Rxb3#
      • 1...Qb4
        • 2.Rd4#
      • 1...Qe1
        • 2.Re3#
      • 1...Qh1
        • 2.Rf3#
      • 1...Qb7+!
    • 1.Rd1+?
      • 1...Ke6
        • 2.Qd7#
        • 2.Qe8#
      • 1...Qxc2!
    • 1.Rd2+?
      • 1...Ke6
        • 2.Qd7#
        • 2.Qe8#
      • 1...Qxc2!
    • 1.Ra3+?
      • 1...Ke6
        • 2.Qd7#
        • 2.Qe8#
      • 1...Qxc2!
    • 1.Rb3+?
      • 1...Ke6
        • 2.Qd7#
        • 2.Qe8#
      • 1...Qxc2!
    • 1.Rc3+?
      • 1...Ke6
        • 2.Qd7#
        • 2.Qe8#
      • 1...Qxc2!
    • 1.Re3+?
      • 1...Ke6
        • 2.Qd7#
        • 2.Qe8#
      • 1...Qxc2!
    • 1.Rf3+?
      • 1...Ke6
        • 2.Qd7#
        • 2.Qe8#
      • 1...Qxc2!
    • 1.Rg3+?
      • 1...Ke6
        • 2.Qd7#
        • 2.Qe8#
      • 1...Qxc2!
    • 1.Rh3+?
      • 1...Ke6
        • 2.Qd7#
        • 2.Qe8#
      • 1...Qxc2!
    • 1.Rd4+?
      • 1...Ke6
        • 2.Qd7#
        • 2.Qe8#
      • 1...Qxc2!
    • 1.Rdd5+?
      • 1...Ke6
        • 2.Qd7#
        • 2.Qe8#
      • 1...Qxc2!
    • 1.Rd7+?
      • 1...Ke6
        • 2.Qc6#
        • 2.Qc4#
      • 1...Qxc2!
    • 1.Rd8+?
      • 1...Ke6
        • 2.Re8#
        • 2.Qd7#
        • 2.Qe8#
      • 1...Qxc2!
    • 1.Qd7+?
      • 1...Kg6
        • 2.Rg3#
        • 2.Qh7#
      • 1...Kxf4!
  • Keys
    • 1.Ra6!
      • threat
        • 2.Qe4#
      • 1...Qg1+
        • 2.Rg3#
      • 1...Qb3+
        • 2.Rxb3#
      • 1...Qb8+
        • 2.Rd8#
      • 1...Kg6
        • 2.Rg3#
        • 2.Qe4#
      • 1...Qb4
        • 2.Rd4#
      • 1...Qb6
        • 2.Rd6#
      • 1...Qe1
        • 2.Re3#
      • 1...Qh1
        • 2.Rf3#
      • 1...Qb7
        • 2.Rd5#

This is a version of 6535

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • K(c);S_FLIGHT::QAB1(C)
    • Q(a);N_GUARD::B(A)+R(B)
  • Tries
    • Try
      • K(H);S_FLIGHT
      • Threat
        • QAB1(C)
      • Vars
        • Q(a);CHECK,N_GUARD::B(A)+R(B),XQ(a)
        • Q(a);N_GUARD::B(A)+R(B)
      • Refutation
        • Q(a);CHECK
    • Try
      • R(B);CHECK
      • Refutation
        • Q(a);XB(A)
    • Try
      • R(B);CHECK
      • Refutation
        • Q(a);XB(A)
    • Try
      • R(B);CHECK
      • Refutation
        • Q(a);XB(A)
    • Try
      • R(B);CHECK
      • Refutation
        • Q(a);XB(A)
    • Try
      • R(B);CHECK
      • Refutation
        • Q(a);XB(A)
    • Try
      • R(B);CHECK
      • Refutation
        • Q(a);XB(A)
    • Try
      • R(B);CHECK
      • Refutation
        • Q(a);XB(A)
    • Try
      • R(B);CHECK
      • Refutation
        • Q(a);XB(A)
    • Try
      • R(B);CHECK
      • Refutation
        • Q(a);XB(A)
    • Try
      • R(B);CHECK
      • Refutation
        • Q(a);XB(A)
    • Try
      • R(B);CHECK
      • Refutation
        • Q(a);XB(A)
    • Try
      • R(B);CHECK
      • Refutation
        • Q(a);XB(A)
    • Try
      • R(B);CHECK
      • Refutation
        • Q(a);XB(A)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(c);P-FLIGHT,XB(D)
  • Actual
    • R(E);
    • Threat
      • QAB1(C)
    • Vars
      • Q(a);CHECK,N_GUARD::B(A)+R(B)
      • Q(a);CHECK,N_GUARD::B(A)+R(B),XQ(a)
      • Q(a);N_GUARD::B(A)+R(B)
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