MESON Chess Problem Database

Problem Display
PID: 107592 (3B4/8/8/5k1p/2BP1pR1/8/2b1PKN1/8 w - - 0 1)

Archer, MT

Montreal Daily Witness, 1903

3B4/8/8/5k1p/2BP1pR1/8/2b1PKN1/8

#2

7 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Rxf4#
    • 1...Be4
      • 2.Rg5#
    • 1...f3
      • 2.Se3#
  • Tries
    • 1.Bd5?
      • threat
        • 2.Rg5#
      • 1...hxg4
        • 2.Sh4#
      • 1...Kxg4!
    • 1.Be6+?
      • 1...Ke4
        • 2.Rxf4#
      • 1...Kxe6!
  • Keys
    • 1.e4+!
      • 1...Kxe4
        • 2.Rxf4#
      • 1...Kxg4
        • 2.Be6#
      • 1...Bxe4
        • 2.Rg5#
      • 1...fxe4 ep+
        • 2.Sxe3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(c);P_SPINP(b),S_FLIGHT::R1(F),XP(b)
    • B(a);SBLOCK::R1(F)
    • P(b);N_GUARD::S(C)
  • Tries
    • Try
      • B(D);
      • Threat
        • R1(F)
      • Vars
        • P(d);SBLOCK,XR(F)::S(C)
      • Refutation
        • K(c);S_FLIGHT,XR(F)
    • Try
      • B(D);CHECK
      • Vars
        • K(c);P_SPINP(b),S_FLIGHT::R1(F),XP(b)
      • Refutation
        • K(c);S_FLIGHT,XB(D)
  • Actual
    • P(A);CHECK
    • Vars
      • K(c);P_SPINP(b),S_FLIGHT,XP(A)::R1(F),XP(b)
      • K(c);S_FLIGHT,XR(F)::B(D)
      • B(a);SBLOCK,XP(A)::R1(F)
      • P(b);CHECK,EP,XP(A)::S(C),XP(b)
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