MESON Chess Problem Database

Problem Display
PID: 179965 (8/4K3/8/R1ppkppR/4b3/8/1P3B1P/4Q3 w - - 0 1)

Gross, Erwin

Die Schwalbe, 1977

8/4K3/8/R1ppkppR/4b3/8/1P3B1P/4Q3

#2

7 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...f4
      • 2.Rxg5#
  • Tries
    • 1.Bg3+?
      • 1...Kd4
        • 2.Qc3#
      • 1...f4!
    • 1.Bd4+?
      • 1...Kxd4
        • 2.Qc3#
      • 1...Kf4
        • 2.Qg3#
      • 1...cxd4!
    • 1.Qc3+?
      • 1...Kf4
        • 2.Qg3#
      • 1...d4!
    • 1.Qe3?
      • 1...d4
        • 2.Rxc5#
      • 1...f4
        • 2.Rxg5#
      • 1...g4
        • 2.Bg3#
        • 2.Qg3#
      • 1...c4!
  • Keys
    • 1.Bxc5!
      • 1...Kf4
        • 2.Qg3#
      • 1...d4
        • 2.Bd6#
      • 1...f4
        • 2.Rxg5#
      • 1...g4
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(e);OGATEB,P_SPINP(f),SBLOCK::R(F),XP(f)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(d);N_SPINB(a),S_FLIGHT::QAB1(A)
      • Refutation
        • P(e);P_SPINP(e)
    • Try
      • B(C);CHECK
      • Vars
        • K(d);N_SPINB(a),S_FLIGHT,XB(C)::QAB1(A)
        • K(d);N_SPINB(a),S_FLIGHT::QAB1(A)
      • Refutation
        • P(b);P_SPINP(c),XB(C)
    • Try
      • Q(A);CHECK,N_PINB(a)
      • Vars
        • K(d);S_FLIGHT::QAB1(A)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(A);
      • Vars
        • P(c);OGATEB,P_SPINP(b)::R(E),XP(b)
        • P(e);OGATEB,P_SPINP(f)::R(F),XP(f)
      • Refutation
        • P(b);P_SPINP(c)
  • Actual
    • B(C);XP(b)
    • Vars
      • K(d);N_SPINB(a),S_FLIGHT::QAB1(A)
      • P(c);SBLOCK::R(E)+B(C),DCHECK
      • P(e);OGATEB,P_SPINP(f),SBLOCK::R(F),XP(f)
      • P(f);P_SPINP(e)::QAB(A)
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