MESON Chess Problem Database

Problem Display
PID: 2540 (8/8/5K2/2B5/4kp2/n7/2R5/1Q6 w - - 0 1)

Marache, Napoleon

Source?, 0000

8/8/5K2/2B5/4kp2/n7/2R5/1Q6

#2

4 + 3

1679 American Chess Nuts 1868

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qb7#
  • Tries
    • 1.Rc3+?
      • 1...Kd5
        • 2.Qb7#
      • 1...Sc2
        • 2.Qb7#
      • 1...Sxb1!
    • 1.Rc4+?
      • 1...Kd5
        • 2.Qe4#
      • 1...Kf3!
    • 1.Qe1+?
      • 1...Kd3
        • 2.Rc3#
        • 2.Qe2#
      • 1...Kd5
        • 2.Qe6#
      • 1...Kf3!
    • 1.Qh1+?
      • 1...Kd3
        • 2.Qh7#
      • 1...f3!
  • Keys
    • 1.Qb7+!
      • 1...Kd3
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(b);S_FLIGHT::QAB(A)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(A)
        • S(a);P_SPINS(a)::QAB(A)
      • Refutation
        • S(a);XQ(A)
    • Try
      • R(B);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(A)
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • Q(A);CHECK
    • Vars
      • K(b);S_FLIGHT::QAB(A)
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Developed and maintained by Brian Stephenson.
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