MESON Chess Problem Database

Problem Display
PID: 40708 (1B6/8/B5Q1/8/3p2qr/1p5p/7R/R2NK1kN w Q - 0 1)

Barnes, Barry Peter

6th Prize, Die Schwalbe TT, 1961

1B6/8/B5Q1/8/3p2qr/1p5p/7R/R2NK1kN

#2

8 + 6

4199 Barnes about Chess Problems 2001
145 StrateGems 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qg3+
      • 2.Qxg3#
    • 1...Rh5
      • 2.Qxg4#
    • 1...Rh6
      • 2.Qxg4#
    • 1...Rh7
      • 2.Qxg4#
    • 1...Rh8
      • 2.Qxg4#
  • Tries
    • 1.Kd2?
      • threat
        • 2.Sb2#
        • 2.Sdf2#
        • 2.Sc3#
        • 2.Se3#
      • 1...Qg2+
        • 2.Sdf2#
      • 1...Qg5+
        • 2.Se3#
      • 1...Qg3
        • 2.Qxg3#
      • 1...b2
        • 2.Sxb2#
      • 1...Qxg6!
    • 1.Sdf2?
      • threat
        • 2.Kd2#
      • 1...Qxg6
        • 2.0-0-0#
      • 1...Qg3
        • 2.Qxg3#
      • 1...Qg5
        • 2.Ke2#
      • 1...b2!
    • 1.Sc3?
      • threat
        • 2.Kd2#
        • 2.Se2#
      • 1...Qg3+
        • 2.Qxg3#
      • 1...Qxg6
        • 2.Se2#
        • 2.0-0-0#
      • 1...Qg2
        • 2.Se2#
        • 2.0-0-0#
      • 1...Qg5
        • 2.Ke2#
        • 2.Se2#
      • 1...b2
        • 2.Se2#
      • 1...d3
        • 2.Kd2#
      • 1...dxc3!
  • Keys
    • 1.Sb2!
      • threat
        • 2.Kd2#
      • 1...Qg3+
        • 2.Qxg3#
      • 1...Qxg6
        • 2.0-0-0#
      • 1...Qg2
        • 2.0-0-0#
      • 1...Qg5
        • 2.Ke2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(e);CHECK,OGATE::QAR2(G),XQ(e)
    • R(f);N_GUARD::QAR(G),XQ(e)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • DUALS(4)
      • Vars
        • Q(e);CHECK::R(A)+S(B)
        • Q(e);OGATE::QAR2(G),XQ(e)
        • P(b);::R(A)+S(B),XP(b)
      • Refutation
        • Q(e);N_SPINQ(e),XQ(G)
    • Try
      • S(B);
      • Threat
        • R(A)+K(C)
      • Vars
        • Q(e);N_SPINQ(e),XQ(G)::0-0-0
        • Q(e);OGATE,P_PINS(B)::QAR2(G),XQ(e)
        • Q(e);::R(A)+K(C)
      • Refutation
        • P(b);
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • Q(e);CHECK,OGATE::QAR2(G),XQ(e)
        • P(b);::S(B)
        • P(d);::R(A)+K(C)
      • Refutation
        • P(d);XS(B)
  • Actual
    • S(B);
    • Threat
      • R(A)+K(C)
    • Vars
      • Q(e);CHECK,OGATE::QAR2(G),XQ(e)
      • Q(e);N_SPINQ(e),XQ(G)::0-0-0
      • Q(e);::0-0-0
      • Q(e);::R(A)+K(C)
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