MESON Chess Problem Database

Problem Display
PID: 166345 (k1K5/1n6/3p4/5Q2/2N5/8/r7/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2016

k1K5/1n6/3p4/5Q2/2N5/8/r7/8

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Ra7
      • 2.Sb6#
  • Tries
    • 1.Qb1?
      • threat
        • 2.Qxb7#
      • 1...Ka7
        • 2.Qxb7#
      • 1...Ra7
        • 2.Sb6#
      • 1...Sa5
        • 2.Qb8#
      • 1...Sc5
        • 2.Qb8#
      • 1...Sd8
        • 2.Qxa2#
        • 2.Qb8#
      • 1...Rb2!
    • 1.Qd7?
      • threat
        • 2.Qxb7#
      • 1...Ka7
        • 2.Qxb7#
      • 1...Ra7
        • 2.Sb6#
      • 1...Sa5
        • 2.Sb6#
      • 1...Sc5
        • 2.Sb6#
      • 1...Sd8
        • 2.Sb6#
      • 1...Rb2!
    • 1.Qh7?
      • threat
        • 2.Qxb7#
      • 1...Ka7
        • 2.Qxb7#
      • 1...Ra7
        • 2.Sb6#
      • 1...Sa5
        • 2.Sb6#
      • 1...Sc5
        • 2.Sb6#
      • 1...Sd8
        • 2.Sb6#
      • 1...Rb2!
    • 1.Qd5?
      • threat
        • 2.Qxb7#
      • 1...Ka7
        • 2.Qxb7#
      • 1...Ra7
        • 2.Sb6#
      • 1...Rb2!
    • 1.Qf7?
      • threat
        • 2.Qxb7#
      • 1...Ka7
        • 2.Qxb7#
      • 1...Ra7
        • 2.Sb6#
      • 1...Sa5
        • 2.Sb6#
      • 1...Sc5
        • 2.Sb6#
      • 1...Sd8
        • 2.Sb6#
      • 1...Rb2!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qxb7#
      • 1...Ka7
        • 2.Qxb7#
      • 1...Rb2
        • 2.Qa6#
      • 1...Ra7
        • 2.Sb6#
      • 1...Sa5
        • 2.Qa6#
        • 2.Qb8#
      • 1...Sc5
        • 2.Qb8#
      • 1...Sd8
        • 2.Qb8#

This is a version of 1057

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(a);SBLOCK::S(A)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XS(c)
      • Vars
        • K(d);P-FLIGHT::QAR1(B),XS(c)
        • R(a);SBLOCK::S(A)
        • S(c);OGATE::QAR1(B)
      • Refutation
        • R(a);
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XS(c)
      • Vars
        • K(d);P-FLIGHT,P_SPINS(c)::QAR1(B),XS(c)
        • R(a);SBLOCK::S(A)
        • S(c);::S(A)
      • Refutation
        • R(a);
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XS(c)
      • Vars
        • K(d);P-FLIGHT,P_SPINS(c)::QAR1(B),XS(c)
        • R(a);SBLOCK::S(A)
        • S(c);::S(A)
      • Refutation
        • R(a);
    • Try
      • Q(B);P_PINS(c)
      • Threat
        • QAB1(B),XS(c)
      • Vars
        • K(d);N_SPINS(c),P-FLIGHT::QAR1(B),XS(c)
        • R(a);SBLOCK::S(A)
      • Refutation
        • R(a);
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XS(c)
      • Vars
        • K(d);P-FLIGHT,P_SPINS(c)::QAR1(B),XS(c)
        • R(a);SBLOCK::S(A)
        • S(c);::S(A)
      • Refutation
        • R(a);
  • Actual
    • Q(B);
    • Threat
      • QAB1(B),XS(c)
    • Vars
      • K(d);P-FLIGHT::QAR1(B),XS(c)
      • R(a);N_GUARD::QAR2(B)
      • R(a);SBLOCK::S(A)
      • S(c);OGATE::QAR1(B)
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