MESON Chess Problem Database

Problem Display
PID: 46285 (8/7K/8/8/3n4/8/R2QN3/qk6 w - - 0 1)

Lewis, Robert Tony

Sp. Comm., The Problemist, 1986

8/7K/8/8/3n4/8/R2QN3/qk6

#2

4 + 3

4883 Still More Fun with Chess Miniatures 2002
136 Problem Observer 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Qxb2#
    • 1...Qc3
      • 2.Sxc3#
    • 1...Qxa2
      • 2.Qc1#
    • 1...Sc2
      • 2.Qxc2#
    • 1...Sxe2
      • 2.Qc2#
    • 1...Sb3
      • 2.Qc2#
    • 1...Sf3
      • 2.Qc2#
    • 1...Sb5
      • 2.Qc2#
    • 1...Sf5
      • 2.Qc2#
    • 1...Sc6
      • 2.Qc2#
    • 1...Se6
      • 2.Qc2#
  • Tries
    • 1.Kh6?
      • 1...Qxa2
        • 2.Qc1#
      • 1...Sxe2
        • 2.Qc2#
      • 1...Qb2
        • 2.Qxb2#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Qc3
        • 2.Sxc3#
      • 1...Sb3
        • 2.Qc2#
      • 1...Sf3
        • 2.Qc2#
      • 1...Sb5
        • 2.Qc2#
      • 1...Sc6
        • 2.Qc2#
      • 1...Se6
        • 2.Qc2#
      • 1...Sf5+!
    • 1.Kg8?
      • 1...Sxe2
        • 2.Qc2#
      • 1...Qb2
        • 2.Qxb2#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Qc3
        • 2.Sxc3#
      • 1...Sb3
        • 2.Qc2#
      • 1...Sf3
        • 2.Qc2#
      • 1...Sb5
        • 2.Qc2#
      • 1...Sf5
        • 2.Qc2#
      • 1...Sc6
        • 2.Qc2#
      • 1...Se6
        • 2.Qc2#
      • 1...Qxa2+!
    • 1.Qd3+?
      • 1...Sc2
        • 2.Qxc2#
      • 1...Kxa2!
  • Keys
    • 1.Kg6!
      • 1...Qxa2
        • 2.Qc1#
      • 1...Sxe2
        • 2.Qc2#
      • 1...Qb2
        • 2.Qxb2#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Qc3
        • 2.Sxc3#
      • 1...Sb3
        • 2.Qc2#
      • 1...Sf3
        • 2.Qc2#
      • 1...Sb5
        • 2.Qc2#
      • 1...Sf5
        • 2.Qc2#
      • 1...Sc6
        • 2.Qc2#
      • 1...Se6
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • Q(a);N_GUARD::QAR1(B),XQ(a)
    • Q(a);N_GUARD::S(C),XQ(a)
    • Q(a);SBLOCK,XR(A)::QAR1(B)
    • S(c);N_GUARD::QAB1(B),XS(c)
    • S(c);N_GUARD,XS(C)::QAB1(B)
    • S(c);N_GUARD::QAB1(B)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • Q(a);SBLOCK,XR(A)::QAR1(B)
        • S(c);N_GUARD,XS(C)::QAB1(B)
        • Q(a);N_GUARD::QAR1(B),XQ(a)
        • S(c);N_GUARD::QAB1(B),XS(c)
        • Q(a);N_GUARD::S(C),XQ(a)
        • S(c);N_GUARD::QAB1(B)
      • Refutation
        • S(c);CHECK
    • Try
      • K(D);S_FLIGHT
      • Vars
        • S(c);N_GUARD,XS(C)::QAB1(B)
        • Q(a);N_GUARD::QAR1(B),XQ(a)
        • S(c);N_GUARD::QAB1(B),XS(c)
        • Q(a);N_GUARD::S(C),XQ(a)
        • S(c);N_GUARD::QAB1(B)
      • Refutation
        • Q(a);CHECK,XR(A)
    • Try
      • Q(B);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB1(B),XS(c)
      • Refutation
        • K(b);S_FLIGHT,XR(A)
  • Actual
    • K(D);S_FLIGHT
    • Vars
      • Q(a);SBLOCK,XR(A)::QAR1(B)
      • S(c);N_GUARD,XS(C)::QAB1(B)
      • Q(a);N_GUARD::QAR1(B),XQ(a)
      • S(c);N_GUARD::QAB1(B),XS(c)
      • Q(a);N_GUARD::S(C),XQ(a)
      • S(c);N_GUARD::QAB1(B)
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