MESON Chess Problem Database

Problem Display
PID: 907 (8/8/8/8/2Q5/4K3/3p2b1/Nn1k4 w - - 0 1)

Lincoln, Robert A

The Problemist Supplement, 1992

8/8/8/8/2Q5/4K3/3p2b1/Nn1k4

#2

3 + 4

2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Ke1
      • 2.Qe2#
    • 1...Bf1
      • 2.Qxf1#
    • 1...Bh1
      • 2.Qf1#
    • 1...Bf3
      • 2.Qf1#
    • 1...Be4
      • 2.Qf1#
    • 1...Bd5
      • 2.Qf1#
    • 1...Bc6
      • 2.Qf1#
    • 1...Bb7
      • 2.Qf1#
    • 1...Ba8
      • 2.Qf1#
  • Tries
    • 1.Qb3+?
      • 1...Kc1
        • 2.Qc2#
      • 1...Ke1!
    • 1.Qa4+?
      • 1...Kc1
        • 2.Qc2#
      • 1...Ke1!
    • 1.Qg4+?
      • 1...Ke1
        • 2.Qe2#
      • 1...Bf3
        • 2.Qg1#
      • 1...Kc1!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qxb1#
      • 1...Kc1
        • 2.Qc2#
      • 1...Ke1
        • 2.Qe2#
      • 1...Be4
        • 2.Qf1#
      • 1...Sa3
        • 2.Qxd2#
      • 1...Sc3
        • 2.Qxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • K(b);P-FLIGHT::QAR1(C)
    • B(d);N_GUARD::QAR2(C),XB(d)
    • B(d);N_GUARD::QAR2(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
        • B(d);OGATE,P_SPINB(d)::QAR(C)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(C);P_PINP(c)
    • Threat
      • QAR2(C),XS(a)
    • Vars
      • K(b);N_SPINP(c),P-FLIGHT::QAR1(C)
      • B(d);N_GUARD::QAR2(C)
      • S(a);N_GUARD::QAR1(C),XP(c)
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