MESON Chess Problem Database

Problem Display
PID: 24133 (8/8/8/1b6/1b6/5N2/Q4p2/5k1K w - - 0 1)

Lincoln, Robert A

diagrammes, 1998

8/8/8/1b6/1b6/5N2/Q4p2/5k1K

#2

3 + 4

2786 More Fun with Chess Miniatures 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Be1
      • 2.Sh2#
    • 1...Ba4
      • 2.Qc4#
    • 1...Bc4
      • 2.Qxc4#
    • 1...Ba6
      • 2.Qxa6#
    • 1...Bc6
      • 2.Qc4#
    • 1...Bd7
      • 2.Qc4#
    • 1...Be8
      • 2.Qc4#
  • Tries
    • 1.Qb1+?
      • 1...Be1
        • 2.Qxb5#
      • 1...Ke2!
    • 1.Qd2?
      • threat
        • 2.Sh2#
      • 1...Bd6
        • 2.Qd1#
      • 1...Bc6
        • 2.Qd3#
      • 1...Bxd2!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Sh2#
      • 1...Be2
        • 2.Qh3#
      • 1...Bd6
        • 2.Sd2#
      • 1...Bc6
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • B(c);SBLOCK::S(C)
    • B(d);N_GUARD::QAB(B)
    • B(d);N_GUARD::QAB(B),XB(d)
    • B(d);OGATEB::QAB(B),XB(d)
    • B(d);N_GUARD,P_PINS(C)::QAB(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • B(c);OGATE,P_SPINB(c)::QAB(B),XB(d)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • S(C)
      • Vars
        • B(c);N_GUARD::QAR2(B)
        • B(d);N_GUARD,P_PINS(C)::QAB(B)
      • Refutation
        • B(c);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • S(C)
    • Vars
      • B(d);SBLOCK::QAB(B)
      • B(c);N_GUARD::S(C)
      • B(d);N_GUARD,P_PINS(C)::QAB(B)
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