MESON Chess Problem Database

Problem Display
PID: 208760 (8/2p5/4R3/2pk4/P1Np1pP1/3R1N2/2KP2B1/8 w - - 0 1)

Koerper, Rudolph

St. Louis Globe Democrat, 1875

8/2p5/4R3/2pk4/P1Np1pP1/3R1N2/2KP2B1/8

#2

9 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Kb3?
      • 1...c6
        • 2.Re5#
      • 1...Kxe6!
    • 1.Sxd4+?
      • 1...f3
        • 2.Se3#
      • 1...Kxc4!
    • 1.Sg5+?
      • 1...f3
        • 2.Se3#
      • 1...Kxc4!
  • Keys
    • 1.Rc6!
      • 1...Kxc4
        • 2.Rxd4#
      • 1...Ke4
        • 2.Sg5#
      • 1...Kxc6
        • 2.Sfe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • P(e);SBLOCK::R1(I)
      • Refutation
        • K(d);N_SPINP(a),S_FLIGHT,XR(I)
    • Try
      • S(E);CHECK,XP(a)
      • Vars
        • P(b);P_SPINP(b)::S(G)
      • Refutation
        • K(d);S_FLIGHT,XS(G)
    • Try
      • S(E);CHECK
      • Vars
        • P(b);N_SPINP(a),P_SPINP(b)::S(G)
      • Refutation
        • K(d);N_SPINP(a),S_FLIGHT,XS(G)
  • Actual
    • R(I);
    • Vars
      • K(d);N_SPINP(a),P_SPINP(c),S_FLIGHT,XS(G)::R1(D),XP(a)
      • K(d);N_SPINP(a),S_FLIGHT::B(C)+S(E),DCHECK
      • K(d);N_SPINP(a),S_FLIGHT,XR(I)::B(C)+S(E),DCHECK
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