MESON Chess Problem Database

Problem Display
PID: 58158 (1r6/b2P2p1/1p3kpp/1R6/2QK3N/B7/8/8 w - - 0 1)

Laws, Benjamin Glover

British Chess Magazine, 1885

1r6/b2P2p1/1p3kpp/1R6/2QK3N/B7/8/8

#2

6 + 7

5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Re8
      • 2.dxe8S#
    • 1...g5
      • 2.Rf5#
  • Tries
    • 1.Re5?
      • threat
        • 2.Be7#
        • 2.Qf1#
        • 2.Qe6#
      • 1...Re8
        • 2.Qf1#
        • 2.dxe8S#
      • 1...b5+!
    • 1.d8S?
      • threat
        • 2.Qf1#
        • 2.Qe6#
        • 2.Qf7#
        • 2.Qc6#
      • 1...Rb7
        • 2.Qf1#
        • 2.Qe6#
        • 2.Qc6#
      • 1...Rc8
        • 2.Qf1#
        • 2.Qe6#
        • 2.Qf7#
      • 1...Rxd8+!
  • Keys
    • 1.Kd5!
      • threat
        • 2.Qf4#
      • 1...Kg5
        • 2.Ke6#
      • 1...Kf7
        • 2.Ke5#
      • 1...g5
        • 2.Qf1#

This anticipates 261534(1959)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(g);OGATE::PXR(g)=S
    • P(c);N_GUARD::R1(E)
  • Tries
    • Try
      • R(E);
      • Threat
        • DUALS(3)
      • Refutation
        • P(a);CHECK
    • Try
      • P(F);
      • Threat
        • DUALS(4)
      • Refutation
        • R(g);CHECK,XS(F)
  • Actual
    • K(C);P-FLIGHT
    • Threat
      • QAR2(B)
    • Vars
      • K(b);S_FLIGHT::R(E)+K(C)
      • K(b);P-FLIGHT::QAB(B)+K(C)
      • P(c);SBLOCK::QAR(B)
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