MESON Chess Problem Database

Problem Display
PID: 36844 (3r2b1/1BBp1p2/p2R2p1/3Nk3/Q3p1rP/8/K2P4/8 w - - 0 1)

Frei-Schuler, Gottlieb

Zurcher Woche, 1970

3r2b1/1BBp1p2/p2R2p1/3Nk3/Q3p1rP/8/K2P4/8

#2

8 + 9

3690 Kunstschach in der Schweiz 1980

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Rf6#
  • Tries
    • 1.Rxa6+?
      • 1...Kf5
        • 2.Se3#
        • 2.Se7#
        • 2.Rf6#
      • 1...d6!
    • 1.Rb6+?
      • 1...Kf5
        • 2.Se3#
        • 2.Se7#
        • 2.Rf6#
      • 1...d6!
    • 1.Rc6+?
      • 1...Kxd5
        • 2.Qc4#
      • 1...Kf5
        • 2.Se3#
        • 2.Se7#
        • 2.Rf6#
      • 1...d6!
    • 1.Re6+?
      • 1...Kf5
        • 2.Re5#
        • 2.Rf6#
      • 1...Kxe6!
    • 1.Rxg6+?
      • 1...Kf5
        • 2.Se7#
        • 2.Rf6#
      • 1...d6!
    • 1.Qd4+?
      • 1...Kf5
        • 2.Rf6#
        • 2.Qf6#
      • 1...Kxd4!
    • 1.d4+?
      • 1...Kf5
        • 2.Rf6#
      • 1...exd4 ep!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Qxe4#
      • 1...f5+
        • 2.Re6#
      • 1...f6+
        • 2.Rd5#
      • 1...Kxf4
        • 2.Rf6#
      • 1...Kf5
        • 2.Qxe4#
      • 1...Rxf4
        • 2.Qa5#
      • 1...e3
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT::R1(F)
  • Tries
    • Try
      • R(F);CHECK,XP(d)
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • R(F);CHECK
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • R(F);CHECK
      • Vars
        • K(c);P-FLIGHT,XS(E)::QAB1(C)
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • R(F);CHECK
      • Refutation
        • K(c);P-FLIGHT,XR(F)
    • Try
      • R(F);CHECK,XP(e)
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(c);S_FLIGHT,XQ(C)
    • Try
      • P(B);CHECK
      • Vars
        • K(c);P-FLIGHT::R1(F)
      • Refutation
        • P(a);EP,XP(B)
  • Actual
    • S(E);
    • Threat
      • QAR1(C),XP(a)
    • Vars
      • P(g);CHECK,SBLOCK::B(H)+R(F),DCHECK
      • K(c);P_SPINP(a),S_FLIGHT,XS(E)::B(H)+R(F),DCHECK
      • K(c);P-FLIGHT::QAB1(C),XP(a)
      • R(b);SBLOCK,XS(E)::QAR(C)
      • P(a);::QAR1(C)
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