MESON Chess Problem Database

Problem Display
PID: 160737 (2b5/bpn1p1p1/p5Qp/rB2B3/3p2qr/P6p/P1P4R/R2NK1kN w - 0 1)

Barnes, Barry Peter

Lipton, Michael

Die Schwalbe, 1962

2b5/bpn1p1p1/p5Qp/rB2B3/3p2qr/P6p/P1P4R/R2NK1kN

#2

11 + 14

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qg3+
      • 2.Qxg3#
  • Tries
    • 1.Sb2?
      • threat
        • 2.Kd2#
      • 1...Qg3+
        • 2.Qxg3#
      • 1...Qg5
        • 2.Ke2#
      • 1...Qg2!
    • 1.Sdf2?
      • threat
        • 2.Kd2#
      • 1...Qg3
        • 2.Qxg3#
      • 1...Qg5
        • 2.Ke2#
      • 1...Rxb5!
    • 1.Sc3?
      • threat
        • 2.Kd2#
        • 2.Se2#
      • 1...Qg3+
        • 2.Qxg3#
      • 1...Rxb5
        • 2.Se2#
      • 1...Qg2
        • 2.Se2#
      • 1...Qg5
        • 2.Ke2#
        • 2.Se2#
      • 1...d3
        • 2.Kd2#
      • 1...dxc3!
  • Keys
    • 1.Kd2!
      • threat
        • 2.Sb2#
        • 2.Sdf2#
        • 2.Sc3#
        • 2.Se3#
      • 1...Qg2+
        • 2.Sdf2#
      • 1...Qg5+
        • 2.Se3#
      • 1...Rxb5
        • 2.Sb2#
      • 1...Qg3
        • 2.Qxg3#

FEATURES

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