MESON Chess Problem Database

Problem Display
PID: 216849 (8/8/3R3B/1p6/5r2/Q1RNq3/1NBkrp2/K3b3 w - - 0 1)

Karge, Fritz

Deutsche Schachzeitung, 1979

8/8/3R3B/1p6/5r2/Q1RNq3/1NBkrp2/K3b3

#2

8 + 7

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sa4?
      • threat
        • 2.Qc1#
      • 1...Qxd3
        • 2.Rdxd3#
      • 1...Rxa4
        • 2.Sb4#
      • 1...bxa4!
  • Keys
    • 1.Sd1!
      • threat
        • 2.Qc1#
      • 1...Qxd3
        • 2.Rdxd3#
      • 1...Qa7
        • 2.Sc5#
      • 1...Ra4
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • QAB1(D)
      • Vars
        • Q(e);OGATE,P_SPINQ(e),P_SPINR(f),XS(F)::R1(G),XQ(e)
        • R(f);N_GUARD,P_PINQ(D),P_SPINQ(e),XS(B)::R(G)+S(F)
      • Refutation
        • P(g);XS(B)
  • Actual
    • S(B);
    • Threat
      • QAB1(D)
    • Vars
      • Q(e);OGATE,P_SPINQ(e),P_SPINR(f),XS(F)::R1(G),XQ(e)
      • Q(e);N_GUARD,P_PINQ(D),P_SPINR(f)::R(G)+S(F)
      • R(f);N_GUARD,P_PINQ(D),P_SPINQ(e)::R(G)+S(F)
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