MESON Chess Problem Database

Problem Display
PID: 179862 (3b4/8/3n4/8/8/3K4/2RNR3/3k4 w - - 0 1)

Jonsson, Christer

3rd Prize, Goteborg Postens, 1993

3b4/8/3n4/8/8/3K4/2RNR3/3k4

#2

4 + 3

136 Problem Observer 2011

SOLUTION

  • SOUND
  • Tries
    • 1.Sb3?
      • threat
        • 2.Rc1#
        • 2.Rcd2#
      • 1...Ba5
        • 2.Rc1#
      • 1...Sc4
        • 2.Rc1#
      • 1...Se4
        • 2.Rc1#
      • 1...Bg5!
    • 1.Sf3?
      • threat
        • 2.Re1#
        • 2.Red2#
      • 1...Bg5
        • 2.Re1#
      • 1...Bh4
        • 2.Red2#
      • 1...Sc4
        • 2.Re1#
      • 1...Se4
        • 2.Re1#
      • 1...Ba5!
    • 1.Sc4?
      • threat
        • 2.Sb2#
        • 2.Se3#
      • 1...Bg5
        • 2.Sb2#
      • 1...Bb6
        • 2.Sb2#
      • 1...Bf6
        • 2.Se3#
      • 1...Sf5
        • 2.Sb2#
      • 1...Sxc4!
    • 1.Se4?
      • threat
        • 2.Sf2#
        • 2.Sc3#
      • 1...Ba5
        • 2.Sf2#
      • 1...Bh4
        • 2.Sc3#
      • 1...Bb6
        • 2.Sc3#
      • 1...Bf6
        • 2.Sf2#
      • 1...Sb5
        • 2.Sf2#
      • 1...Sxe4!
    • 1.Ra2?
      • threat
        • 2.Ra1#
      • 1...Kc1
        • 2.Re1#
      • 1...Bf6!
    • 1.Rf2?
      • threat
        • 2.Rf1#
      • 1...Ke1
        • 2.Rf1#
      • 1...Bh4!
  • Keys
    • 1.Rb2!
      • threat
        • 2.Rb1#
      • 1...Kc1
        • 2.Rb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);::R1(A)
        • S(b);::R1(A)
      • Refutation
        • B(c);
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);::R1(C)
        • S(b);::R1(C)
      • Refutation
        • B(c);
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);::S(B)
        • S(b);::S(B)
      • Refutation
        • S(b);XS(B)
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);::S(B)
        • S(b);::S(B)
      • Refutation
        • S(b);XS(B)
    • Try
      • R(A);
      • Threat
        • R(A)
      • Vars
        • K(a);P-FLIGHT::R(C)
      • Refutation
        • B(c);
    • Try
      • R(C);
      • Threat
        • R(C)
      • Vars
        • K(a);P-FLIGHT::R1(C)
      • Refutation
        • B(c);
  • Actual
    • R(A);
    • Threat
      • R(A)
    • Vars
      • K(a);P-FLIGHT::R1(A)
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