MESON Chess Problem Database

Problem Display
PID: 190308 (K6b/8/4pp2/pR6/4k3/4Nb2/8/3Q2BB w - - 0 1)

Junker, Karl

Schweizerische Schachzeitung, 1983

K6b/8/4pp2/pR6/4k3/4Nb2/8/3Q2BB

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4+
      • 2.Qxf3#
  • Tries
    • 1.Rd5?
      • threat
        • 2.Qxf3#
        • 2.Qa4#
        • 2.Qd4#
      • 1...Kf4
        • 2.Qxf3#
      • 1...Bxh1
        • 2.Qg4#
      • 1...Bg2
        • 2.Qg4#
      • 1...a4
        • 2.Qxf3#
        • 2.Qxa4#
        • 2.Qd4#
      • 1...e5
        • 2.Qxf3#
        • 2.Qa4#
      • 1...f5
        • 2.Qxf3#
      • 1...exd5!
    • 1.Qd5+?
      • 1...Kf4
        • 2.Qxf3#
      • 1...exd5!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qc4#
      • 1...Kd4+
        • 2.Sd5#
      • 1...Kf4+
        • 2.Qxf3#
      • 1...Bxh1
        • 2.Sg2#
      • 1...Bg2
        • 2.Sxg2#
      • 1...f5
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(b);CHECK,N_SPINB(a),P-FLIGHT::QAR1(A),XB(a)
  • Tries
    • Try
      • R(E);
      • Threat
        • DUALS(3)
      • Vars
        • K(b);N_SPINB(a),P-FLIGHT,P_PINR(E)::QAR1(A),XB(a)
        • B(a);N_SPINB(a),OGATE,XB(C)::QAR2(A)
        • B(a);OGATE::QAR2(A)
        • P(e);::QAB1(A),XB(a)
      • Refutation
        • P(d);XR(E)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);N_SPINB(a),OGATE,P-FLIGHT,P_PINQ(A)::QAR1(A),XB(a)
      • Refutation
        • P(d);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • K(b);CHECK,N_SPINB(a),P-FLIGHT::B(B)+S(D)
      • K(b);CHECK,N_SPINB(a),P-FLIGHT::QAR1(A),XB(a)
      • B(a);N_GUARD,N_SPINB(a),XB(C)::QAR(A)+S(D)
      • B(a);N_GUARD::QAR(A)+S(D),XB(a)
      • P(e);SBLOCK::QAR(A)+S(D)
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