MESON Chess Problem Database

Problem Display
PID: 52454 (1rR5/1rB4K/7P/P1kPP3/PR3p2/1p3B2/nN4p1/3NQb2 w - - 0 1)

Howard, Kenneth Samuel

Chess Amateur (The), 1927

1rR5/1rB4K/7P/P1kPP3/PR3p2/1p3B2/nN4p1/3NQb2

#2

13 + 8

5089 The Enjoyment of Chess Problems 1943

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb4
      • 2.Bb6#
    • 1...Rb5
      • 2.Bb6#
      • 2.Bd6#
      • 2.Bxb8#
    • 1...Rb6
      • 2.Bxb6#
      • 2.Bd6#
    • 1...Rxc7+
      • 2.Rxc7#
    • 1...Bd3+
      • 2.Sxd3#
    • 1...Bc4
      • 2.Rxc4#
    • 1...Sxb4
      • 2.Qf2#
  • Tries
    • 1.Rb5+?
      • 1...Kd4
        • 2.Qf2#
        • 2.Qe4#
      • 1...Rxb5
        • 2.Bb6#
      • 1...Bxb5!
    • 1.Qc3+?
      • 1...Bc4
        • 2.Sd3#
        • 2.Rxc4#
        • 2.Qxc4#
      • 1...Sxc3!
  • Keys
    • 1.Qh4!
      • threat
        • 2.Qe7#
      • 1...Bd3+
        • 2.Sxd3#
      • 1...Kxb4
        • 2.Qe7#
      • 1...Rxb4
        • 2.Bb6#
      • 1...Sxb4
        • 2.Qf2#
      • 1...Bc4
        • 2.Rxc4#
      • 1...Rb6
        • 2.Bd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(g);N_PINB(K),XR(F)::R(M)+B(K),DCHECK
    • R(g);CHECK,OGATE,P_SPINR(g),XB(K)::R(M),XR(g)
    • B(a);CHECK,N_GUARD::S(C),XB(a)
    • B(a);N_GUARD::R1(F),XB(a)
    • S(b);SBLOCK,XR(F)::QAB(B)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • R(g);N_PINB(K),XR(F)::R(M)+B(K),DCHECK
      • Refutation
        • B(a);XR(F)
    • Try
      • Q(B);CHECK
      • Refutation
        • S(b);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)
    • Vars
      • B(a);CHECK,N_GUARD::S(C),XB(a)
      • K(f);P_SPINP(e),S_FLIGHT,XR(F)::QAB(B)
      • R(g);N_PINB(K),SBLOCK,XR(F)::R(M)+B(K),DCHECK
      • S(b);SBLOCK,XR(F)::QAB(B)
      • B(a);N_GUARD::R1(F),XB(a)
      • R(g);N_PINB(K)::R(M)+B(K),DCHECK
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