MESON Chess Problem Database

Problem Display
PID: 150590 (1bb5/r7/p1pk1B2/2p3p1/B1p5/2N5/4RK2/1Q6 w - - 0 1)

Ahlheim, Karl-Heinz

Die Schwalbe, 1987

1bb5/r7/p1pk1B2/2p3p1/B1p5/2N5/4RK2/1Q6

#2

6 + 9

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rc7
      • 2.Qd1#
    • 1...Bc7
      • 2.Qd1#
  • Tries
    • 1.Rd2+?
      • 1...Kc7
        • 2.Be5#
        • 2.Bd8#
      • 1...Ke6!
    • 1.Qh1?
      • threat
        • 2.Qxc6#
      • 1...Kc7
        • 2.Qxc6#
      • 1...Kd7
        • 2.Qxc6#
      • 1...Rc7
        • 2.Qd1#
      • 1...Bd7
        • 2.Qh2#
      • 1...Bb7!
    • 1.Qb6?
      • threat
        • 2.Qxc6#
      • 1...Kd7
        • 2.Qd8#
        • 2.Qxc6#
      • 1...Bb7
        • 2.Qd8#
      • 1...Bd7
        • 2.Be7#
      • 1...Rc7!
  • Keys
    • 1.Qe4!
      • threat
        • 2.Qxc6#
      • 1...Kc7
        • 2.Qxc6#
      • 1...Kd7
        • 2.Qxc6#
        • 2.Qe7#
      • 1...Rc7
        • 2.Rd2#
      • 1...Bb7
        • 2.Qe7#
      • 1...Bd7
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(g);SBLOCK::QAR(A)
    • B(h);SBLOCK::QAR(A)
  • Tries
    • Try
      • R(B);CHECK
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(e)
      • Vars
        • K(f);S_FLIGHT::QAR1(A),XP(e)
        • K(f);P-FLIGHT,P_SPINP(e)::QAB1(A),XP(e)
        • R(g);SBLOCK::QAR(A)
        • B(i);SBLOCK::QAB(A)
      • Refutation
        • B(i);
    • Try
      • Q(A);P_PINP(e)
      • Threat
        • QAR1(A),XP(e)
      • Vars
        • B(i);N_GUARD,S_CUTR(g)::QAR2(A)
        • B(i);SBLOCK,S_CUTR(g)::B(F)
      • Refutation
        • R(g);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XP(e)
    • Vars
      • K(f);S_FLIGHT::QAR1(A),XP(e)
      • R(g);SBLOCK::R(B)
      • B(i);S_CUTR(g)::QAB1(A)
      • B(i);SBLOCK::QAB1(A)
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