MESON Chess Problem Database

Problem Display
PID: 176018 (4R1Q1/N1p5/1pr5/2pq4/8/2B5/k1K5/8 w - - 0 1)

ten Cate, Pieter

Probleemblad, 1978

4R1Q1/N1p5/1pr5/2pq4/8/2B5/k1K5/8

#2

5 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qb3+
      • 2.Qxb3#
  • Tries
    • 1.Re1?
      • threat
        • 2.Ra1#
      • 1...Qb3+
        • 2.Qxb3#
      • 1...Ka3!
    • 1.Qxd5+?
      • 1...Ka3
        • 2.Qb3#
      • 1...c4!
  • Keys
    • 1.Ra8!
      • threat
        • 2.Sb5#
        • 2.Sxc6#
        • 2.Sc8#
      • 1...Qb3+
        • 2.Qxb3#
      • 1...Ka3
        • 2.Sb5#
        • 2.Sxc6#
        • 2.Sc8#
      • 1...Qxg8
        • 2.Sc8#
      • 1...Rd6
        • 2.Sb5#
        • 2.Sc6#
        • 2.Sc8#
      • 1...Re6
        • 2.Sc6#
      • 1...Rf6
        • 2.Sb5#
        • 2.Sc6#
        • 2.Sc8#
      • 1...Rg6
        • 2.Sb5#
        • 2.Sc6#
        • 2.Sc8#
      • 1...Rh6
        • 2.Sb5#
        • 2.Sc6#
        • 2.Sc8#
      • 1...c4
        • 2.Sb5#
      • 1...b5
        • 2.Sxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(c);CHECK,OGATE::QAB1(E),XQ(c)
  • Tries
    • Try
      • R(D);
      • Threat
        • R1(D)
      • Vars
        • Q(c);CHECK,OGATE::QAB1(E),XQ(c)
      • Refutation
        • K(a);N_SPINQ(c),P-FLIGHT
    • Try
      • Q(E);CHECK,XQ(c)
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • P(b);P_SPINP(b)
  • Actual
    • R(D);
    • Threat
      • DUALS(3)
    • Vars
      • Q(c);CHECK,OGATE::QAB1(E),XQ(c)
      • Q(c);N_SPINQ(c),XQ(E)::R(D)+S(C)
      • R(e);N_SPINQ(c)::R(D)+S(C)
      • P(b);N_SPINQ(c)::R(D)+S(C)
      • P(d);::R(D)+S(C),XR(e)
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