MESON Chess Problem Database

Problem Display
PID: 182831 (3K4/3R4/1p1n1P1b/Pp1k2nR/1P1B4/rN3P2/BPQ5/8 w - - 0 1)

Fortsch, M

Comm., Belliboni-Faria Festival, 1989

3K4/3R4/1p1n1P1b/Pp1k2nR/1P1B4/rN3P2/BPQ5/8

#2

12 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Sc5#
  • Tries
    • 1.Kc7?
      • threat
        • 2.Rxd6#
      • 1...Ke6
        • 2.Sc5#
      • 1...Bf8!
    • 1.Sd2+?
      • 1...Rxa2
        • 2.Qe4#
      • 1...Rb3
        • 2.Qe4#
      • 1...Kxd4!
    • 1.Rxg5+?
      • 1...Ke6
        • 2.Sc5#
        • 2.Re7#
      • 1...Bxg5!
    • 1.Qf5+?
      • 1...Kc6
        • 2.Rc7#
      • 1...Kc4!
    • 1.Qc5+?
      • 1...Ke6
        • 2.Re7#
        • 2.Qe5#
      • 1...bxc5!
  • Keys
    • 1.Bc3!
      • threat
        • 2.Qe4#
      • 1...Kc4
        • 2.Sd2#
      • 1...Kc6
        • 2.Sd4#
      • 1...Ke6
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINS(d),S_FLIGHT::B(A)+S(D),DCHECK
  • Tries
    • Try
      • K(L);S_FLIGHT
      • Threat
        • R1(K),XS(f)
      • Vars
        • K(c);N_SPINS(d),S_FLIGHT::B(A)+S(D),DCHECK
      • Refutation
        • B(g);
    • Try
      • S(D);CHECK
      • Vars
        • R(a);XB(A)::QAB1(C)
        • R(a);P_SPINR(a)::QAB1(C)
      • Refutation
        • K(c);N_SPINS(d),P-FLIGHT,P_SPINS(f),XB(G)
    • Try
      • R(I);CHECK,P_PINS(f),XS(d)
      • Refutation
        • B(g);P_PINP(J),XR(I)
    • Try
      • Q(C);CHECK,N_PINS(d),P_PINS(f)
      • Vars
        • K(c);N_SPINS(f),S_FLIGHT::R1(K)
      • Refutation
        • K(c);N_SPINS(f),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • P(e);XQ(C)
  • Actual
    • B(G);
    • Threat
      • QAB1(C)
    • Vars
      • K(c);N_SPINS(d),S_FLIGHT::B(A)+S(D),DCHECK
      • K(c);N_SPINS(d),S_FLIGHT::S(D)
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