MESON Chess Problem Database

Problem Display
PID: 222811 (k7/PR1r4/8/3Np3/3b4/1R3B1b/8/3K4 w - - 0 1)

Cook, Eugene Beauharnais

Baltimore American and Commercial Advertiser, 1883

k7/PR1r4/8/3Np3/3b4/1R3B1b/8/3K4

#2

6 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Sc7#
    • 1...Rc7
      • 2.Sxc7#
    • 1...Rd8
      • 2.Sc7#
  • Tries
    • 1.Rxd7?
      • threat
        • 2.Sb6#
        • 2.Rb8#
      • 1...Bxa7
        • 2.Sc7#
      • 1...Bb6
        • 2.Sxb6#
      • 1...e4
        • 2.Rb8#
      • 1...Bxd7!
  • Keys
    • 1.Ra3!
      • threat
        • 2.Rb8#
      • 1...Kxb7
        • 2.a8Q#
      • 1...Rxb7
        • 2.Sc7#
      • 1...Bxa7
        • 2.Raxa7#
      • 1...Rd8
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(d);N_GUARD::S(D)
    • R(d);N_GUARD::S(D),XR(d)
  • Tries
    • Try
      • R(F);XR(d)
      • Threat
        • DUALS(2)
      • Vars
        • B(b);SBLOCK,XP(E)::B(C)+S(D),DCHECK
        • B(b);::B(C)+S(D),DCHECK,XB(b)
        • P(c);::R1(B)
      • Refutation
        • B(a);XR(F)
  • Actual
    • R(B);
    • Threat
      • R1(F)
    • Vars
      • K(e);OGATE,S_FLIGHT,XR(F)::P=Q
      • R(d);N_GUARD,XR(F)::S(D)
      • B(b);OGATE,P_PINS(D),P_SPINB(b),XP(E)::R1(B),XB(b)
      • R(d);N_GUARD::S(D)
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