MESON Chess Problem Database

Problem Display
PID: 153205 (8/8/5n2/7p/2RbQ3/5K1k/8/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2011

8/8/5n2/7p/2RbQ3/5K1k/8/8

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Ba1
      • 2.Qh4#
    • 1...Bg1
      • 2.Qh4#
    • 1...Bb2
      • 2.Qh4#
    • 1...Bc3
      • 2.Qh4#
    • 1...Be3
      • 2.Qh4#
    • 1...Bc5
      • 2.Qh4#
    • 1...Be5
      • 2.Qh4#
    • 1...Bb6
      • 2.Qh4#
    • 1...Ba7
      • 2.Qh4#
  • Tries
    • 1.Qe1?
      • threat
        • 2.Qg3#
        • 2.Qh1#
      • 1...Bg1
        • 2.Rh4#
        • 2.Qg3#
        • 2.Qh4#
      • 1...Bf2
        • 2.Qh1#
      • 1...Be5
        • 2.Rh4#
        • 2.Qh4#
      • 1...Se4
        • 2.Qh1#
      • 1...Sg4
        • 2.Qg3#
      • 1...h4
        • 2.Qh1#
      • 1...Kh2!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qg3#
      • 1...Kh2
        • 2.Qg2#
      • 1...Kh4
        • 2.Qg3#
      • 1...Bf2
        • 2.Qg2#
      • 1...Be5
        • 2.Qg2#
      • 1...Se4
        • 2.Qxh5#
      • 1...Sg4
        • 2.Qxh5#
      • 1...h4
        • 2.Qg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 8
  • Sets
    • B(b);::QAR1(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(b);::QAR2(C)
        • S(d);::QAR2(C)
        • S(d);::QAR1(C)
        • P(c);SBLOCK::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • K(a);P-FLIGHT::QAR1(C)
      • K(a);P-FLIGHT,P_SPINB(b)::QAB1(C)
      • B(b);::QAB1(C)
      • S(d);N_GUARD::QAR2(C),XP(c)
      • P(c);SBLOCK::QAB1(C)
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