MESON Chess Problem Database

Problem Display
PID: 99540 (1K6/1B6/1N6/kPQ1BR2/1n1P4/8/8/8 w - - 0 1)

Hasenzahl, Karl

Magyar Sakkelet, 1955

1K6/1B6/1N6/kPQ1BR2/1n1P4/8/8/8

#2

8 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sa6+
      • 2.bxa6#
    • 1...Sc6+
      • 2.bxc6#
  • Tries
    • 1.Rf2?
      • 1...Sa6+
        • 2.bxa6#
      • 1...Sc6+
        • 2.bxc6#
      • 1...Sa2
        • 2.Rxa2#
      • 1...Sd3
        • 2.Ra2#
      • 1...Sd5
        • 2.Ra2#
      • 1...Sc2!
    • 1.Qxb4+?
      • 1...Kxb6
        • 2.Bc7#
        • 2.Rf6#
      • 1...Kxb4!
  • Keys
    • 1.Qc3!
      • 1...Kxb5
        • 2.Qc5#
      • 1...Kxb6
        • 2.Bc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(a);CHECK,OGATE::QAR(C)+P(B),XS(a)
  • Tries
    • Try
      • R(E);
      • Vars
        • S(a);CHECK,OGATE::QAR(C)+P(B),XS(a)
        • S(a);N_GUARD::R(E),XS(a)
        • S(a);N_GUARD::R(E)
      • Refutation
        • S(a);
    • Try
      • Q(C);CHECK,XS(a)
      • Refutation
        • K(b);S_FLIGHT,XQ(C)
  • Actual
    • Q(C);P_PINS(a)
    • Vars
      • K(b);N_SPINS(a),OGATEB,P-FLIGHT,XP(B)::QAR1(C)
      • K(b);N_SPINS(a),OGATEB,S_FLIGHT,XS(F)::B(D)
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