MESON Chess Problem Database

Problem Display
PID: 222659 (KQ4B1/4p3/5b2/2P1R3/N2k1p2/p2PpP2/b4n1q/3R4 w - - 0 1)

Bristow, Henry

2nd Prize, Sheffield Independent, 1884

KQ4B1/4p3/5b2/2P1R3/N2k1p2/p2PpP2/b4n1q/3R4

#2

9 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Rd5#
    • 1...Bd5+
      • 2.Rxd5#
    • 1...Sh1
      • 2.Re4#
    • 1...Sxd3
      • 2.Re4#
    • 1...Sh3
      • 2.Re4#
    • 1...Se4
      • 2.Rxe4#
    • 1...Sg4
      • 2.Re4#
  • Tries
    • 1.Qd6+?
      • 1...Bd5+
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...exd6!
    • 1.Qb4+?
      • 1...Bc4
        • 2.Rd5#
        • 2.Qc3#
      • 1...Kxe5!
    • 1.Qd8+?
      • 1...Bd5+
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...Kxe5!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Qa1#
      • 1...Bd5+
        • 2.Rxd5#
      • 1...Kxe5
        • 2.d4#
      • 1...Bxb1
        • 2.Rd5#
      • 1...Sxd1
        • 2.Re4#
      • 1...Sxd3
        • 2.Re4#
      • 1...Sh1
        • 2.Re4#
      • 1...Sh3
        • 2.Re4#
      • 1...Se4
        • 2.Rxe4#
      • 1...Sg4
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::R1(F)
    • B(a);CHECK,N_GUARD::R1(F),XB(a)
    • S(b);N_GUARD::R1(F)
    • S(b);N_GUARD,P_SPINS(b),XP(B)::R1(F)
    • S(b);N_GUARD::R1(F),XS(b)
  • Tries
    • Try
      • Q(H);CHECK
      • Refutation
        • P(i);XQ(H)
    • Try
      • Q(H);CHECK
      • Refutation
        • K(f);S_FLIGHT,XR(F)
    • Try
      • Q(H);CHECK
      • Refutation
        • K(f);S_FLIGHT,XR(F)
  • Actual
    • Q(H);
    • Threat
      • QAB(H)
    • Vars
      • B(a);CHECK,N_GUARD::R1(F),XB(a)
      • K(f);OGATE,S_FLIGHT,XR(F)::P(B)
      • B(a);N_GUARD,XQ(H)::R1(F)
      • S(b);N_GUARD,XR(A)::R1(F)
      • S(b);N_GUARD,P_SPINS(b),XP(B)::R1(F)
      • S(b);N_GUARD::R1(F)
      • S(b);N_GUARD::R1(F),XS(b)
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