MESON Chess Problem Database

Problem Display
PID: 151588 (8/8/8/N7/p5p1/P2k2K1/Rn1P2B1/b1Q5 w - - 0 1)

Ahlheim, Karl-Heinz

Die Schwalbe, 1962

8/8/8/N7/p5p1/P2k2K1/Rn1P2B1/b1Q5

#2

7 + 5

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Ke2
      • 2.Bf1#
    • 1...Kd4
      • 2.Qc3#
    • 1...Sd1
      • 2.Qc4#
    • 1...Sc4
      • 2.Qxc4#
  • Tries
    • 1.Kxg4?
      • 1...Kd4
        • 2.Qc3#
      • 1...Sd1
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Ke2!
    • 1.Sc6?
      • 1...Ke2
        • 2.Bf1#
      • 1...Sc4
        • 2.Qf1#
      • 1...Sd1!
    • 1.Bh1?
      • 1...Kd4
        • 2.Qc3#
      • 1...Sd1
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Ke2!
    • 1.Bf3?
      • threat
        • 2.Qc3#
      • 1...Kd4
        • 2.Qc3#
      • 1...Sd1
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...gxf3!
    • 1.Bc6?
      • 1...Kd4
        • 2.Qc3#
      • 1...Sd1
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Ke2!
    • 1.Bb7?
      • 1...Kd4
        • 2.Qc3#
      • 1...Sd1
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Ke2!
    • 1.Ba8?
      • 1...Kd4
        • 2.Qc3#
      • 1...Sd1
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Ke2!
    • 1.Rxb2?
      • threat
        • 2.Qc4#
      • 1...Ke2
        • 2.Bf1#
        • 2.Qf1#
      • 1...Kd4
        • 2.Qc3#
      • 1...Bxb2!
  • Keys
    • 1.Qe1!
      • 1...Kc2
        • 2.Be4#
      • 1...Kd4
        • 2.Qe3#
      • 1...Sd1
        • 2.Qe4#
      • 1...Sc4
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(c);S_FLIGHT::B(D)
    • K(c);P-FLIGHT::QAB1(A)
    • S(b);N_GUARD::QAB1(A)
    • S(b);N_GUARD::QAB1(A),XS(b)
  • Tries
    • Try
      • K(F);P-FLIGHT,XP(e)
      • Vars
        • K(c);P-FLIGHT::QAB1(A)
        • S(b);N_GUARD::QAB1(A)
        • S(b);N_GUARD::QAB1(A),XS(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(G);
      • Vars
        • K(c);S_FLIGHT::B(D)
        • S(b);SBLOCK::QAB(A)
      • Refutation
        • S(b);
    • Try
      • B(D);
      • Vars
        • K(c);P-FLIGHT::QAB1(A)
        • S(b);N_GUARD::QAB1(A)
        • S(b);N_GUARD::QAB1(A),XS(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • B(D);
      • Threat
        • QAR1(A)
      • Vars
        • K(c);P-FLIGHT::QAB1(A)
        • S(b);N_GUARD::QAB1(A)
        • S(b);N_GUARD::QAB1(A),XS(b)
      • Refutation
        • P(e);XB(D)
    • Try
      • B(D);
      • Vars
        • K(c);P-FLIGHT::QAB1(A)
        • S(b);N_GUARD::QAB1(A)
        • S(b);N_GUARD::QAB1(A),XS(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • B(D);
      • Vars
        • K(c);P-FLIGHT::QAB1(A)
        • S(b);N_GUARD::QAB1(A)
        • S(b);N_GUARD::QAB1(A),XS(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • B(D);
      • Vars
        • K(c);P-FLIGHT::QAB1(A)
        • S(b);N_GUARD::QAB1(A)
        • S(b);N_GUARD::QAB1(A),XS(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(B);XS(b)
      • Threat
        • QAB1(A)
      • Vars
        • K(c);P-FLIGHT::QAB1(A)
      • Refutation
        • B(a);XR(B)
  • Actual
    • Q(A);
    • Vars
      • K(c);P_SPINS(b),S_FLIGHT::B(D)
      • K(c);P-FLIGHT::QAB1(A)
      • S(b);::QAB1(A)
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