MESON Chess Problem Database

Problem Display
PID: 51499 (4R3/1B2b3/8/2Prp2K/4k1P1/2Bp4/5Q2/7b w - - 0 1)

Brotherton, David WA

The Guardian, 1962

4R3/1B2b3/8/2Prp2K/4k1P1/2Bp4/5Q2/7b

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bh4
      • 2.Rxe5#
    • 1...Bxc5
      • 2.Rxe5#
    • 1...Bg5
      • 2.Rxe5#
    • 1...Bd8
      • 2.Rxe5#
    • 1...Bf8
      • 2.Rxe5#
  • Tries
    • 1.Bd2?
      • threat
        • 2.Qe3#
      • 1...Bxc5
        • 2.Qf4#
      • 1...Bg5!
    • 1.Bd4?
      • threat
        • 2.Qe3#
      • 1...Bg5
        • 2.Rxe5#
      • 1...exd4+!
    • 1.Rxe7?
      • threat
        • 2.Rxe5#
      • 1...Bf3
        • 2.Qd4#
      • 1...d2!
  • Keys
    • 1.Bxe5!
      • threat
        • 2.Qf4#
      • 1...Kxe5
        • 2.Rxe7#
      • 1...d2
        • 2.Qe2#
      • 1...Bf3
        • 2.Qd4#
      • 1...Bg5
        • 2.Bf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(f);OGATE,P_SPINP(e)::R1(G),XP(e)
    • B(f);OGATE,P_SPINP(e),XP(D)::R1(G),XP(e)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAR1(A)
      • Vars
        • B(f);P_SPINP(e),XP(D)::QAR1(A)
      • Refutation
        • B(f);P_SPINP(e)
    • Try
      • B(B);
      • Threat
        • QAR1(A)
      • Vars
        • B(f);OGATE,P_SPINP(e)::R1(G),XP(e)
      • Refutation
        • P(e);CHECK,P_SPINB(f),XB(B)
    • Try
      • R(G);P_PINP(e),XB(f)
      • Threat
        • R1(G),XP(e)
      • Vars
        • B(a);P_PINP(C),SBLOCK::QAR1(A)
      • Refutation
        • P(b);
  • Actual
    • B(B);P_SPINB(B),XP(e)
    • Threat
      • QAR1(A)
    • Vars
      • K(c);N_SPINR(d),OGATEB,P-FLIGHT,P_SPINB(f),XB(B)::R(G),XB(f)
      • P(b);N_GUARD::QAR2(A)
      • B(a);P_PINP(C),SBLOCK::QAR1(A)
      • B(f);N_PINB(B)::R(G)+B(B)
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