MESON Chess Problem Database

Problem Display
PID: 27426 (8/8/8/n7/1bpp4/2kp4/Q1P5/N1NK4 w - - 0 1)

Lebeck, Donald

Mate in Two!! (Lebeck), 1992

8/8/8/n7/1bpp4/2kp4/Q1P5/N1NK4

#2

5 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...dxc2+
      • 2.Qxc2#
    • 1...d2
      • 2.Se2#
  • Tries
    • 1.Qa3+?
      • 1...Sb3
        • 2.Sa2#
      • 1...Bxa3!
    • 1.cxd3?
      • threat
        • 2.Qc2#
        • 2.Qd2#
      • 1...Ba3
        • 2.Qd2#
      • 1...Bc5
        • 2.Qd2#
      • 1...Bd6
        • 2.Qd2#
      • 1...Be7
        • 2.Qd2#
      • 1...Bf8
        • 2.Qd2#
      • 1...Sb3
        • 2.Qc2#
      • 1...cxd3!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Sa2#
      • 1...dxc2+
        • 2.Qxc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • P(b);CHECK,OGATE,XP(E)::QAR1(D),XP(b)
    • P(b);N_GUARD::S(B)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • S(f);P_SPINS(f)::S(B)
      • Refutation
        • B(c);XQ(D)
    • Try
      • P(E);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(c);::QAB1(D)
        • S(f);::QAR1(D)
      • Refutation
        • P(d);XP(E)
  • Actual
    • Q(D);
    • Threat
      • S(B)
    • Vars
      • P(b);CHECK,OGATE,XP(E)::QAR1(D),XP(b)
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