MESON Chess Problem Database

Problem Display
PID: 227456 (8/8/4K3/1R1p2B1/2Nk4/4R3/8/8 w - - 0 1)

Schaffer, Hans

Das Ratsel, 1926

8/8/4K3/1R1p2B1/2Nk4/4R3/8/8

#2

5 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...dxc4
      • 2.Rd5#
  • Tries
    • 1.Kd6?
      • 1...dxc4
        • 2.Rd5#
      • 1...Kxc4!
    • 1.Bf4?
      • 1...dxc4
        • 2.Rd5#
      • 1...Kxc4!
    • 1.Bh6?
      • 1...dxc4
        • 2.Rd5#
      • 1...Kxc4!
    • 1.Bd8?
      • 1...dxc4
        • 2.Bb6#
      • 1...Kxc4!
    • 1.Ra5?
      • 1...dxc4
        • 2.Rd5#
      • 1...Kxc4!
    • 1.Rc5?
      • 1...dxc4
        • 2.Rd5#
      • 1...Kxc5!
  • Keys
    • 1.Be7!
      • 1...Kxc4
        • 2.Rb4#
      • 1...dxc4
        • 2.Bc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK,XS(B)::R1(C)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Vars
        • P(b);SBLOCK,XS(B)::R1(C)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
    • Try
      • B(D);
      • Vars
        • P(b);SBLOCK,XS(B)::R1(C)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
    • Try
      • B(D);
      • Vars
        • P(b);SBLOCK,XS(B)::R1(C)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
    • Try
      • B(D);
      • Vars
        • P(b);SBLOCK,XS(B)::B(D)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
    • Try
      • R(C);
      • Vars
        • P(b);SBLOCK,XS(B)::R1(C)
      • Refutation
        • K(a);P-FLIGHT,XS(B)
    • Try
      • R(C);
      • Vars
        • P(b);SBLOCK,XS(B)::R1(C)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
  • Actual
    • B(D);
    • Vars
      • K(a);OGATEB,P-FLIGHT,XS(B)::R1(C)
      • P(b);SBLOCK,XS(B)::B(D)
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