MESON Chess Problem Database

Problem Display
PID: 10452 (3Q2n1/8/p7/r2pkP2/6n1/3Rp1K1/8/1B6 w - - 0 1)

Barnes, Barry Peter

Sunday Times, 1964

3Q2n1/8/p7/r2pkP2/6n1/3Rp1K1/8/1B6

#2

5 + 7

3174 The Two-move Chess Problem Tradition and Development 1966
17120 Tehtavashakin kasikirja (Kallio) 1995
4199 Barnes about Chess Problems 2001
5454 Near Snap 2009
133 The Problemist Supplement 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Rxd5#
    • 1...Kxf5
      • 2.Rxe3#
    • 1...Ra1
      • 2.Rxd5#
    • 1...Ra2
      • 2.Rxd5#
    • 1...Ra3
      • 2.Rxd5#
    • 1...Ra4
      • 2.Rxd5#
  • Tries
    • 1.Qe7+?
      • 1...Kxf5
        • 2.Rd1#
        • 2.Rd2#
        • 2.Ra3#
        • 2.Rb3#
        • 2.Rc3#
        • 2.Rxe3#
        • 2.Rd4#
        • 2.Rxd5#
      • 1...Sxe7!
    • 1.Qd6+?
      • 1...Ke4
        • 2.Rd1#
        • 2.Rd2#
        • 2.Rxd5#
        • 2.Qf4#
      • 1...Kxf5
        • 2.Rxd5#
      • 1...Kxd6!
    • 1.Qd7?
      • threat
        • 2.Qe6#
      • 1...Ke4
        • 2.Rxd5#
      • 1...Kf6!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qe6#
      • 1...Ke4
        • 2.Rxe3#
      • 1...Kxf5
        • 2.Rxd5#

This anticipates 80076(1985)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • K(e);P-FLIGHT::B(A)+R(B),XP(d)
    • K(e);P-FLIGHT,XP(D)::B(A)+R(B),XP(a)
    • R(c);N_GUARD::R1(B),XP(d)
  • Tries
    • Try
      • Q(E);CHECK
      • Refutation
        • S(g);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(e);P-FLIGHT,XP(D)::B(A)+R(B),DCHECK,XP(d)
      • Refutation
        • K(e);P_SPINP(d),S_FLIGHT,XQ(E)
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • K(e);P-FLIGHT::B(A)+R(B),XP(d)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • Q(E);
    • Threat
      • QAR1(E)
    • Vars
      • K(e);P-FLIGHT::B(A)+R(B),DCHECK,XP(a)
      • K(e);P-FLIGHT,XP(D)::B(A)+R(B),DCHECK,XP(d)
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