MESON Chess Problem Database

Problem Display
PID: 258590 (1b6/7B/8/3p1r2/1P3P2/4RQP1/1p6/kb2K2R w K - 0 1)

Ahlheim, Karl-Heinz

Deutsche Schachzeitung, 1988

1b6/7B/8/3p1r2/1P3P2/4RQP1/1p6/kb2K2R

#2

8 + 6

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ka2
      • 2.Ra3#
  • Tries
    • 1.Kd2?
      • threat
        • 2.Ra3#
      • 1...Ka2
        • 2.Ra3#
      • 1...Bxf4!
    • 1.Ke2?
      • threat
        • 2.Ra3#
      • 1...Ka2
        • 2.Ra3#
      • 1...Re5!
    • 1.Kf2?
      • threat
        • 2.Ra3#
      • 1...Ka2
        • 2.Ra3#
      • 1...Ba7!
    • 1.0-0?
      • threat
        • 2.Ra3#
      • 1...Ka2
        • 2.Ra3#
      • 1...Ba7!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Ra3#
      • 1...Ka2
        • 2.Qa4#
      • 1...Re5
        • 2.Qxb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,S_CUTB(b)::R1(C)
  • Tries
    • Try
      • K(A);P_PINB(b),S_FLIGHT
      • Threat
        • R(C)
      • Vars
        • K(a);N_SPINB(b),P-FLIGHT::R1(C)
      • Refutation
        • B(f);P_PINR(C),XP(G)
    • Try
      • K(A);P-FLIGHT,P_PINB(b)
      • Threat
        • R(C)
      • Vars
        • K(a);N_SPINB(b),P-FLIGHT::R1(C)
      • Refutation
        • R(e);P_PINR(C)
    • Try
      • K(A);P_PINB(b),S_FLIGHT
      • Threat
        • R(C)
      • Vars
        • K(a);N_SPINB(b),P-FLIGHT::R1(C)
      • Refutation
        • B(f);P_PINR(C)
    • Try
      • K(A);0-0,P_PINB(b)
      • Threat
        • R(C)
      • Vars
        • K(a);N_SPINB(b),P-FLIGHT::R1(C)
      • Refutation
        • B(f);P_PINR(C)
  • Actual
    • Q(D);P_PINB(b)
    • Threat
      • R(C)
    • Vars
      • K(a);N_SPINB(b),P-FLIGHT,S_CUTB(b)::QAR2(D)
      • R(e);P_PINR(C)::QAR1(D),XB(b)
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