MESON Chess Problem Database

Problem Display
PID: 10062 (4K3/3R4/4Qp2/1B1P1p2/3k1p2/3NqP2/1N1PP3/2B5 w - - 0 1)

Barnes, Barry Peter

3rd Prize, Skakbladet, 1963

4K3/3R4/4Qp2/1B1P1p2/3k1p2/3NqP2/1N1PP3/2B5

#2

11 + 5

3174 The Two-move Chess Problem Tradition and Development 1966
4199 Barnes about Chess Problems 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.Qb6#
      • 2.Qxf6#
    • 1...Qf2
      • 2.Qb6#
      • 2.Qxf6#
    • 1...Qxe6+
      • 2.dxe6#
  • Tries
    • 1.Sd1?
      • threat
        • 2.Bb2#
      • 1...Qxe6+
        • 2.dxe6#
      • 1...Qxd2
        • 2.Qb6#
        • 2.Qxf6#
      • 1...Qxd3!
    • 1.Sc4?
      • threat
        • 2.Bb2#
      • 1...Qxe6+
        • 2.dxe6#
      • 1...Qxd2
        • 2.Qxf6#
      • 1...Qxd3
        • 2.Qb6#
      • 1...Qxe2!
    • 1.dxe3+?
      • 1...fxe3
        • 2.Qxf6#
      • 1...Kc3!
  • Keys
    • 1.Sa4!
      • threat
        • 2.Bb2#
      • 1...Qxe6+
        • 2.dxe6#
      • 1...Qxd2
        • 2.Qb6#
      • 1...Qxd3
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(a);CHECK,OGATE,XQ(I)::R(J)+P(H),XQ(a)
  • Tries
    • Try
      • S(B);
      • Threat
        • B(A)
      • Vars
        • Q(a);CHECK,OGATE,XQ(I)::R(J)+P(H),XQ(a)
      • Refutation
        • Q(a);N_PINQ(I),XS(E)
    • Try
      • S(B);
      • Threat
        • B(A)
      • Vars
        • Q(a);CHECK,OGATE,XQ(I)::R(J)+P(H),XQ(a)
        • Q(a);N_PINQ(I),XP(C)::QAB(I),XP(e)
        • Q(a);N_PINQ(I),XS(E)::QAB(I)
      • Refutation
        • Q(a);XP(D)
    • Try
      • P(C);CHECK,N_SPINQ(I),XQ(a)
      • Vars
        • P(c);XP(C)::QAB(I),XP(e)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(B);
    • Threat
      • B(A)
    • Vars
      • Q(a);CHECK,OGATE,XQ(I)::R(J)+P(H),XQ(a)
      • Q(a);N_PINQ(I),XP(C)::QAB(I)
      • Q(a);N_PINQ(I),XS(E)::QAB(I),XP(e)
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