MESON Chess Problem Database

Problem Display
PID: 247338 (1Q6/8/8/5p1p/b4K2/7k/4R3/8 w - - 0 1)

Lincoln, Robert A

Uralski Problemist, 2006

1Q6/8/8/5p1p/b4K2/7k/4R3/8

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kh4
      • 2.Rh2#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Rh2#
      • 1...Kh4
        • 2.Rh2#
      • 1...Bc2!
    • 1.Qb3+?
      • 1...Kh4
        • 2.Rh2#
        • 2.Qg3#
      • 1...Bxb3!
    • 1.Qb7?
      • threat
        • 2.Qh1#
      • 1...Kh4
        • 2.Rh2#
        • 2.Qh1#
      • 1...Bc6!
    • 1.Qa8?
      • threat
        • 2.Qh1#
      • 1...Kh4
        • 2.Rh2#
        • 2.Qh1#
      • 1...Bc6!
    • 1.Qe8?
      • threat
        • 2.Qxh5#
      • 1...Kh4
        • 2.Rh2#
      • 1...h4
        • 2.Qe3#
      • 1...Bxe8!
    • 1.Qh8?
      • threat
        • 2.Qxh5#
      • 1...Kh4
        • 2.Rh2#
      • 1...h4
        • 2.Qc3#
      • 1...Be8!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qg3#
      • 1...Kh4
        • 2.Rh2#
        • 2.Qg3#
      • 1...h4
        • 2.Qg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::R(A)
  • Tries
    • Try
      • Q(C);
      • Threat
        • R1(A)
      • Vars
        • K(a);P-FLIGHT::R(A)
      • Refutation
        • B(b);
    • Try
      • Q(C);CHECK
      • Refutation
        • B(b);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Refutation
        • B(b);
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Refutation
        • B(b);
    • Try
      • Q(C);
      • Threat
        • QAR2(C),XP(d)
      • Vars
        • K(a);P-FLIGHT::R(A)
        • P(d);SBLOCK::QAR(C)
      • Refutation
        • B(b);XQ(C)
    • Try
      • Q(C);P_PINP(d)
      • Threat
        • QAR2(C),XP(d)
      • Vars
        • K(a);P-FLIGHT::R(A)
        • P(d);SBLOCK::QAR(C)
      • Refutation
        • B(b);
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • P(d);SBLOCK::QAB1(C)
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