MESON Chess Problem Database

Problem Display
PID: 85834 (3B4/3K4/1N2p3/5n1R/P2k4/3p1P2/3Q4/8 w - - 0 1)

Speckmann, Werner

Schach-Echo, 1984

3B4/3K4/1N2p3/5n1R/P2k4/3p1P2/3Q4/8

#2

7 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qc3#
    • 1...Ke5
      • 2.Qe3#
    • 1...Se3
      • 2.Qb2#
  • Tries
    • 1.Bf6+?
      • 1...Kc5
        • 2.Qa5#
      • 1...e5!
    • 1.Rh4+?
      • 1...Kc5
        • 2.Rc4#
        • 2.Qc1#
        • 2.Qc3#
        • 2.Qb4#
        • 2.Qa5#
      • 1...Ke5
        • 2.Re4#
        • 2.Qf4#
        • 2.Qa5#
      • 1...Sxh4!
    • 1.Qb4+?
      • 1...Ke5
        • 2.Qd6#
        • 2.Qe4#
        • 2.f4#
      • 1...Ke3!
    • 1.Qf4+?
      • 1...Kc5
        • 2.Qd6#
        • 2.Qc4#
      • 1...Kc3!
    • 1.Qb2+?
      • 1...Kc5
        • 2.Be7#
        • 2.Qc3#
      • 1...Ke3!
    • 1.Qf2+?
      • 1...Ke5
        • 2.Qe3#
      • 1...Se3
        • 2.Qb2#
      • 1...Kc3!
    • 1.Qxd3+?
      • 1...Kc5
        • 2.Qc4#
        • 2.Qc3#
        • 2.Qd6#
      • 1...Ke5
        • 2.Qe4#
        • 2.Qe3#
        • 2.Qd6#
      • 1...Kxd3!
  • Keys
    • 1.Bg5!
      • 1...Kc5
        • 2.Be3#
      • 1...Ke5
        • 2.Qf4#
      • 1...Sg3
        • 2.Be3#
      • 1...Se3
        • 2.Bxe3#
      • 1...Sh4
        • 2.Be3#
      • 1...Sd6
        • 2.Be3#
      • 1...Sh6
        • 2.Be3#
      • 1...Se7
        • 2.Be3#
      • 1...Sg7
        • 2.Be3#
      • 1...e5
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINP(a),P_SPINS(c),S_FLIGHT::QAR2(A)
    • S(c);SBLOCK::QAB(A)
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • K(b);N_SPINP(a),P_SPINS(c),S_FLIGHT::QAR2(A)
      • Refutation
        • P(d);
    • Try
      • R(D);CHECK
      • Refutation
        • S(c);XR(D)
    • Try
      • Q(A);CHECK,N_PINP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK,N_PINP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK,N_PINP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK,N_PINP(a)
      • Vars
        • K(b);P_SPINS(c),S_FLIGHT::QAR2(A)
        • S(c);P_SPINS(c),SBLOCK::QAB(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK,XP(a)
      • Refutation
        • K(b);P-FLIGHT,XQ(A)
  • Actual
    • B(G);
    • Vars
      • K(b);N_SPINP(a),S_FLIGHT::B(G)
      • K(b);N_SPINP(a),S_FLIGHT::QAB1(A)
      • S(c);N_GUARD::B(G)
      • S(c);N_GUARD::B(G),XS(c)
      • P(d);SBLOCK::QAR2(A)
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