MESON Chess Problem Database

Problem Display
PID: 27866 (6K1/8/1p3B2/8/8/1p6/k1pQ4/1N6 w - - 0 1)

Lebeck, Donald

Mate in Two!! (Lebeck), 1992

6K1/8/1p3B2/8/8/1p6/k1pQ4/1N6

#2

4 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Qa5+?
      • 1...Kxb1
        • 2.Qa1#
      • 1...bxa5!
    • 1.Qxc2+?
      • 1...b2
        • 2.Qxb2#
      • 1...bxc2!
  • Keys
    • 1.Qd4!
      • threat
        • 2.Qa1#
        • 2.Qb2#
      • 1...Kxb1
        • 2.Qa1#
        • 2.Qb2#
      • 1...cxb1Q
        • 2.Qa4#
      • 1...cxb1R
        • 2.Qa4#
      • 1...b2
        • 2.Qxb2#
      • 1...c1Q
        • 2.Qa1#
      • 1...c1B
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK,N_PINP(b)
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(A)::QAR1(B)
      • Refutation
        • P(d);XQ(B)
    • Try
      • Q(B);CHECK,XP(b)
      • Vars
        • P(c);P_SPINP(c)::QAR1(B),XP(c)
      • Refutation
        • P(c);XQ(B)
  • Actual
    • Q(B);N_PINP(b)
    • Threat
      • DUALS(2)
    • Vars
      • P(b);SBLOCK,XS(A)::QAR2(B)
      • P(c);::QAR1(B),XP(c)
      • P(b);::QAR1(B)
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