MESON Chess Problem Database

Problem Display
PID: 140307 (8/3R4/1B5p/KP1P4/N1kp2Qq/2ppP3/2rP3r/N1R5 w - - 0 1)

Gross, Erwin

Probleemblad, 1976

8/3R4/1B5p/KP1P4/N1kp2Qq/2ppP3/2rP3r/N1R5

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Qxd4#
    • 1...Qf2
      • 2.Qxd4#
    • 1...Qg3
      • 2.Qxd4#
    • 1...Qg5
      • 2.Qxd4#
    • 1...Qe7
      • 2.Qxd4#
    • 1...Qd8
      • 2.Qxd4#
    • 1...Qh3
      • 2.Qxd4#
    • 1...Qh5
      • 2.Qxd4#
    • 1...Ra2
      • 2.Rxc3#
    • 1...Rb2
      • 2.Sxb2#
      • 2.Rxc3#
    • 1...Rcxd2
      • 2.Rxc3#
  • Tries
    • 1.Sb2+?
      • 1...Rxb2
        • 2.Rxc3#
      • 1...cxb2!
    • 1.Sxc3?
      • threat
        • 2.Rc7#
      • 1...Ra2+
        • 2.Sxa2#
      • 1...Rxc3
        • 2.Rxc3#
      • 1...Qg3
        • 2.Qxd4#
      • 1...Qe7
        • 2.Qxd4#
      • 1...Qd8
        • 2.Qxd4#
      • 1...Qf6!
    • 1.Rb1?
      • threat
        • 2.Rb4#
      • 1...Qe7
        • 2.Qxd4#
      • 1...Rb2!
    • 1.Rxc2?
      • threat
        • 2.Sb2#
        • 2.Rxc3#
      • 1...Qxg4
        • 2.Sb2#
      • 1...dxc2!
    • 1.Rd6?
      • threat
        • 2.Qc8#
      • 1...Qe7
        • 2.Qxd4#
      • 1...Qd8
        • 2.Qxd4#
      • 1...Qh3
        • 2.Qxd4#
      • 1...Qxg4!
    • 1.Qe6?
      • threat
        • 2.Rc7#
        • 2.Qc6#
        • 2.d6#
      • 1...Qf6
        • 2.Rc7#
      • 1...Qg3
        • 2.Qc6#
        • 2.d6#
      • 1...Qg5
        • 2.Rc7#
        • 2.Qc6#
      • 1...Qd8
        • 2.Qc6#
        • 2.d6#
      • 1...Qh3
        • 2.Rc7#
        • 2.Qc6#
      • 1...Qe4
        • 2.Rc7#
        • 2.Qc6#
      • 1...Qf4
        • 2.Qc6#
        • 2.d6#
      • 1...Qg4
        • 2.Rc7#
        • 2.Qc6#
      • 1...Qh5
        • 2.Rc7#
        • 2.Qc6#
      • 1...Qe7!
  • Keys
    • 1.Bxd4!
      • threat
        • 2.Sb6#
      • 1...Qd8+
        • 2.Bb6#
      • 1...Qf6
        • 2.Bxf6#
      • 1...Ra2
        • 2.Rxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • Q(g);N_GUARD::QAR1(F),XP(f)
    • Q(g);N_GUARD,P_PINB(J)::QAR1(F),XP(f)
    • R(a);N_SPINP(f),OGATE,P_PINS(E),P_SPINP(c)::R1(B),XP(c)
    • R(a);N_SPINP(f),OGATE,P_SPINP(c),XP(C)::R1(B),XP(c)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • R(a);N_SPINP(f),OGATE,P_SPINP(c),XS(E)::R1(B),XP(c)
      • Refutation
        • P(c);P_SPINR(a),XS(E)
    • Try
      • S(E);XP(c)
      • Threat
        • R(K)
      • Vars
        • R(a);CHECK::R(B)+S(E),XR(a)
        • R(a);OGATE,P_SPINR(a),XS(E)::R1(B),XR(a)
        • Q(g);N_GUARD::QAR1(F),XP(f)
        • Q(g);N_GUARD,P_PINB(J)::QAR1(F),XP(f)
      • Refutation
        • Q(g);
    • Try
      • R(B);
      • Threat
        • R1(B)
      • Vars
        • Q(g);N_GUARD::QAR1(F),XP(f)
      • Refutation
        • R(a);
    • Try
      • R(B);N_PINP(f),P_PINP(c),XR(a)
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);XQ(F)::S(E)
      • Refutation
        • P(d);N_SPINP(c),P_SPINP(f),XR(B)
    • Try
      • R(K);
      • Threat
        • QAR(F)
      • Vars
        • Q(g);N_GUARD::QAR1(F),XP(f)
        • Q(g);N_GUARD,P_PINB(J)::QAR1(F),XP(f)
      • Refutation
        • Q(g);N_SPINP(f),XQ(F)
    • Try
      • Q(F);N_PINP(f)
      • Threat
        • DUALS(3)
      • Vars
        • Q(g);::R(K)
      • Refutation
        • Q(g);
  • Actual
    • B(J);XP(f)
    • Threat
      • S(E)
    • Vars
      • Q(g);CHECK,N_GUARD::QAR(F)+B(J)
      • Q(g);N_GUARD::QAR(F)+B(J),XQ(g)
      • R(a);OGATE,P_PINS(E),P_SPINP(c)::R1(B),XP(c)
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