MESON Chess Problem Database

Problem Display
PID: 188455 (6B1/n2KBNr1/8/3k4/4p3/6p1/b3N1n1/2Q3b1 w - - 0 1)

Schonholzer, Andreas

Schweizerische Schachzeitung, 1969

6B1/n2KBNr1/8/3k4/4p3/6p1/b3N1n1/2Q3b1

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bh2
      • 2.Qc5#
    • 1...Bc5
      • 2.Qxc5#
    • 1...Se3
      • 2.Qc5#
    • 1...Sb5
      • 2.Qc6#
    • 1...Sc6
      • 2.Qxc6#
    • 1...Sc8
      • 2.Qc6#
  • Tries
    • 1.Sf4+?
      • 1...Kd4
        • 2.Bc5#
        • 2.Bf6#
        • 2.Qc5#
      • 1...Sxf4!
    • 1.Qd2+?
      • 1...Bd4
        • 2.Qxa2#
        • 2.Qxd4#
      • 1...Kc4!
    • 1.Qa3?
      • threat
        • 2.Qxa2#
      • 1...Kc4
        • 2.Sd6#
      • 1...e3
        • 2.Qd3#
      • 1...Bb1
        • 2.Qb3#
      • 1...Bb3
        • 2.Qxb3#
      • 1...Bc4
        • 2.Qd6#
      • 1...Se3
        • 2.Qc5#
      • 1...Rxf7!
    • 1.Qd1+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...Kc4!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qxa2#
      • 1...Kc4
        • 2.Se5#
      • 1...Rxf7
        • 2.Bxf7#
      • 1...e3
        • 2.Qd4#
      • 1...Bb1
        • 2.Qb3#
      • 1...Bb3
        • 2.Qxb3#
      • 1...Bc4
        • 2.Qe5#
      • 1...Se3
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • B(a);N_GUARD::QAR1(A)
    • B(a);N_GUARD::QAR1(A),XB(a)
    • S(c);S_CUTB(a)::QAR1(A)
    • S(g);N_GUARD::QAB1(A)
    • S(g);N_GUARD::QAB1(A),XS(g)
  • Tries
    • Try
      • S(B);CHECK
      • Refutation
        • S(c);XS(B)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB(A),XB(b)
      • Vars
        • K(f);S_FLIGHT::B(F)+S(E),DCHECK
        • P(e);N_GUARD,S_CUTB(a)::QAR2(A)
        • B(b);N_GUARD::QAB(A)
        • B(b);N_GUARD::QAB(A),XB(b)
        • B(b);SBLOCK::QAR1(A)
        • S(c);S_CUTB(a)::QAR1(A)
      • Refutation
        • R(h);P_PINB(D),P_SPINR(h),XS(E)
    • Try
      • Q(A);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(A),XB(a)
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB(A),XB(b)
    • Vars
      • K(f);S_FLIGHT::B(F)+S(E),DCHECK
      • R(h);OGATE,P_PINB(D),P_SPINR(h),XS(E)::B(F),XR(h)
      • P(e);S_CUTB(a)::QAR1(A)
      • B(b);N_GUARD::QAB(A)
      • B(b);N_GUARD::QAB(A),XB(b)
      • B(b);SBLOCK::QAR1(A)
      • S(c);S_CUTB(a)::QAR1(A)
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