MESON Chess Problem Database

Problem Display
PID: 91219 (K1BR4/8/4Np2/p2ppp1n/1pp1k3/q3NpR1/b7/2B2Qb1 w - - 0 1)

Schneider, Michael

Die Schwalbe, 1968

K1BR4/8/4Np2/p2ppp1n/1pp1k3/q3NpR1/b7/2B2Qb1

#2

8 + 13

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd3
      • 2.Qxf3#
    • 1...d4
      • 2.Bb7#
  • Tries
    • 1.Sc5+?
      • 1...Kf4
        • 2.Qxf3#
      • 1...Kd4!
    • 1.Qxc4+?
      • 1...dxc4
        • 2.Bb7#
      • 1...d4
        • 2.Bb7#
      • 1...Bxc4!
    • 1.Qd1?
      • threat
        • 2.Qxd5#
      • 1...Sf4
        • 2.Sc5#
      • 1...Qd3
        • 2.Qxf3#
      • 1...c3
        • 2.Qc2#
      • 1...d4
        • 2.Bb7#
      • 1...Qxc1!
  • Keys
    • 1.Sxf5!
      • threat
        • 2.Sd6#
      • 1...Kxf5
        • 2.Sc5#
      • 1...Qxc1
        • 2.Qxf3#
      • 1...Bc5
        • 2.Sxc5#
      • 1...b3
        • 2.Qxf3#
      • 1...d4
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(c);SBLOCK::QAB1(B),XP(d)
    • P(i);OGATEB::B(G)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(g);P-FLIGHT,P_SPINP(d)::QAR1(B),XP(d)
      • Refutation
        • K(g);P-FLIGHT,P_SPINP(i)
    • Try
      • Q(B);CHECK,XP(f)
      • Vars
        • P(i);S_CUTB(b),XQ(B)::B(G)
        • P(i);P_SPINP(i),S_CUTB(b)::B(G)
      • Refutation
        • B(b);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XP(i)
      • Vars
        • S(l);SBLOCK::S(E)
        • Q(c);SBLOCK::QAB1(B),XP(d)
        • P(f);S_CUTQ(c)::QAB(B)
        • P(i);OGATEB::B(G)
      • Refutation
        • Q(c);XB(A)
  • Actual
    • S(C);XP(k)
    • Threat
      • S(C)
    • Vars
      • K(g);P_SPINP(d),S_FLIGHT,XS(C)::B(G)+S(E)
      • Q(c);N_GUARD,XB(A)::QAB1(B),XP(d)
      • B(a);N_GUARD::S(E),XB(a)
      • P(e);S_CUTQ(c)::QAB1(B),XP(d)
      • P(i);S_CUTB(a)::S(E)
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