MESON Chess Problem Database

Problem Display
PID: 230885 (2b1k3/2r1n1RK/p2b2p1/1R6/B3Q2B/8/8/8 w - - 0 1)

Coldwell, Jonas B

Design and Work, 1878

(First published on Sat Nov 23 1878)

2b1k3/2r1n1RK/p2b2p1/1R6/B3Q2B/8/8/8

#2

6 + 7

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bh3
      • 2.Rb8#
    • 1...Bg4
      • 2.Rb8#
    • 1...Bf5
      • 2.Rb8#
    • 1...Be6
      • 2.Rb8#
  • Tries
    • 1.Rf5+?
      • 1...Kd8
        • 2.Rf8#
        • 2.Rg8#
      • 1...Rd7
        • 2.Rg8#
      • 1...Bd7
        • 2.Rg8#
      • 1...Rc6!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Rg8#
      • 1...Kd8
        • 2.Rg8#
      • 1...Kf8
        • 2.Qf7#
      • 1...Bxe6
        • 2.Rb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(f);::B(A)+R(D),DCHECK
    • B(f);N_SPINS(e)::B(A)+R(D),DCHECK
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • R(d);P_SPINR(d)::R(E)
        • B(f);P_SPINB(f)::R(E)
      • Refutation
        • R(d);P_SPINR(d)
  • Actual
    • Q(B);
    • Threat
      • R(E)
    • Vars
      • K(g);P-FLIGHT::R(E)
      • K(g);N_SPINS(e),P-FLIGHT::QAR1(B)
      • B(f);N_SPINS(e),XQ(B)::B(A)+R(D),DCHECK
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