MESON Chess Problem Database

Problem Display
PID: 250712 (8/2B5/8/8/3k4/R7/K1Q5/8 w - - 0 1)

Hoffmann, Martin Wolfgang

Schweizerische Schachzeitung, 1998

8/2B5/8/8/3k4/R7/K1Q5/8

#2

4 + 1

SOLUTION

  • SOUND
  • Tries
    • 1.Ra4+?
      • 1...Kd5
        • 2.Qc4#
      • 1...Ke3!
    • 1.Qb3?
      • 1...Ke4
        • 2.Qd3#
      • 1...Kc5!
    • 1.Qe4+?
      • 1...Kc5
        • 2.Ra5#
      • 1...Kxe4!
    • 1.Qc3+?
      • 1...Ke4
        • 2.Qe5#
        • 2.Qd3#
      • 1...Kd5!
    • 1.Qc5+?
      • 1...Ke4
        • 2.Re3#
        • 2.Qe5#
      • 1...Kxc5!
  • Keys
    • 1.Kb3!
      • 1...Ke3
        • 2.Kc4#
      • 1...Kd5
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::R(C)
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
  • Actual
    • K(A);S_FLIGHT
    • Vars
      • K(a);S_FLIGHT::R(C)+K(A)
      • K(a);N_GUARD,P-FLIGHT::QAB1(B)
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