MESON Chess Problem Database

Problem Display
PID: 32542 (4B1K1/3N4/1p1p4/r1B3p1/kpR1Q1r1/1R6/3b4/8 w - - 0 1)

Aston, EJ

The Westminster Papers, 1876

4B1K1/3N4/1p1p4/r1B3p1/kpR1Q1r1/1R6/3b4/8

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kb5
      • 2.Sb8#
    • 1...Bc1
      • 2.Rcxb4#
    • 1...Be3
      • 2.Rcxb4#
    • 1...Bf4
      • 2.Rcxb4#
    • 1...bxc5
      • 2.Sxc5#
    • 1...dxc5
      • 2.Sxc5#
  • Tries
    • 1.Ra3+?
      • 1...Kb5
        • 2.Sb8#
      • 1...Kxa3!
  • Keys
    • 1.Bxb4!
      • threat
        • 2.Sc5#
      • 1...Kxb3
        • 2.Qc2#
      • 1...Kb5
        • 2.Sc5#
        • 2.Sb8#
      • 1...Rb5
        • 2.Ra3#
      • 1...Rc5
        • 2.Sxc5#
      • 1...b5
        • 2.Ra3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • K(b);S_FLIGHT::B(F)+S(E)
    • B(a);N_GUARD::R1(B),XP(c)
    • P(g);XB(D)::B(F)+S(E),DCHECK,XP(g)
    • P(h);XB(D)::B(F)+S(E),DCHECK,XP(h)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(b);N_SPINP(c),S_FLIGHT::B(F)+S(E)
      • Refutation
        • K(b);P-FLIGHT,XR(A)
  • Actual
    • B(D);XP(c)
    • Threat
      • B(F)+S(E),DCHECK
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(A)::QAB1(C)
      • R(e);SBLOCK::R1(A)
      • R(e);::B(F)+S(E),DCHECK,XR(e)
      • P(g);SBLOCK::R1(A)
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