MESON Chess Problem Database

Problem Display
PID: 247607 (4b3/3N4/6B1/3R4/4pk1n/4R2P/2KB4/8 w - - 0 1)

Evans, TC

British Chess Magazine, 1932

4b3/3N4/6B1/3R4/4pk1n/4R2P/2KB4/8

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sg2
      • 2.Rf5#
    • 1...Sf5
      • 2.Rxf5#
  • Tries
    • 1.Bh5?
      • threat
        • 2.Rf3#
      • 1...Sf3
        • 2.Rxf3#
      • 1...Bxh5!
  • Keys
    • 1.Rdd3!
      • threat
        • 2.Rf3#
        • 2.Rxe4#
      • 1...exd3+
        • 2.Rxd3#
      • 1...Kg5
        • 2.Rg3#
      • 1...Bxg6
        • 2.Rf3#
      • 1...Bxd7
        • 2.Rxe4#
      • 1...Sxg6
        • 2.Rf3#
      • 1...Sf3
        • 2.Rxf3#
      • 1...Sf5
        • 2.Rf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • S(c);N_GUARD::R1(E)
    • S(c);N_GUARD::R1(E),XS(c)
  • Tries
    • Try
      • B(F);
      • Threat
        • B(B)+R(C),DCHECK
      • Vars
        • S(c);::B(B)+R(C),DCHECK,XS(c)
      • Refutation
        • B(d);XB(F)
  • Actual
    • R(E);
    • Threat
      • DUALS(2)
    • Vars
      • P(a);CHECK,OGATE,XR(E)::B(B)+R(C),XP(a)
      • K(b);S_FLIGHT::B(B)+R(C),DCHECK
      • B(d);XB(F)::B(B)+R(C),DCHECK
      • B(d);XS(G)::B(B)+R(C),DCHECK,XP(a)
      • S(c);XB(F)::B(B)+R(C),DCHECK
      • S(c);::B(B)+R(C),DCHECK,XS(c)
      • S(c);::B(B)+R(C),DCHECK
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