MESON Chess Problem Database

Problem Display
PID: 120998 (3k4/2RP2K1/3N4/N6B/8/8/8/8 w - - 0 1)

Anonymous

Source?, 0000

3k4/2RP2K1/3N4/N6B/8/8/8/8

#2

6 + 1

3713 Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sab7+?
      • 1...Ke7
        • 2.d8S#
      • 1...Kxc7!
    • 1.Sf7+?
      • 1...Kxc7
        • 2.d8Q#
      • 1...Ke7!
  • Keys
    • 1.Sdb7+!
      • 1...Kxc7
        • 2.d8Q#
      • 1...Ke7
        • 2.d8S#

This anticipates 10057(1961)

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::P=S
      • Refutation
        • K(a);S_FLIGHT,XR(D)
    • Try
      • S(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XR(D)::P=Q
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(C);CHECK
    • Vars
      • K(a);OGATE,S_FLIGHT,XR(D)::P=Q
      • K(a);OGATE,S_FLIGHT::P=S
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