MESON Chess Problem Database

Problem Display
PID: 189310 (4R3/1p1B4/1P6/1K1kp3/8/3P2B1/4P3/3R4 w - - 0 1)

Schaer, Eric

Schweizerische Schachzeitung, 1972

4R3/1p1B4/1P6/1K1kp3/8/3P2B1/4P3/3R4

#2

8 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...e4
      • 2.dxe4#
  • Tries
    • 1.Bf2?
      • 1...e4
        • 2.dxe4#
      • 1...Kd6!
    • 1.Re6?
      • 1...e4
        • 2.Rd6#
        • 2.dxe4#
      • 1...Kd4!
    • 1.e3?
      • 1...e4
        • 2.Be6#
        • 2.dxe4#
      • 1...Kd6!
  • Keys
    • 1.d4!
      • 1...Ke4
        • 2.Rxe5#
      • 1...Kd6
        • 2.dxe5#
      • 1...exd4
        • 2.e4#
      • 1...e4
        • 2.Be6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATE::R(A)+P(C)DCHECK,XP(b)
  • Tries
    • Try
      • B(D);
      • Vars
        • P(b);OGATE::R(A)+P(C)DCHECK,XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(H);
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(B);
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
  • Actual
    • P(C);
    • Vars
      • K(a);P_SPINP(b),S_FLIGHT::R1(H),XP(b)
      • K(a);P-FLIGHT,P_SPINP(b)::R(A)+P(C)DCHECK,XP(b)
      • P(b);P_SPINP(b),XP(C)::P(B)
      • P(b);SBLOCK::B(G)
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