MESON Chess Problem Database

Problem Display
PID: 182476 (8/2BK4/3RQ3/bp2r3/1RB1k1P1/r6b/5P2/8 w - - 0 1)

Greenwood, William M

British Chess Magazine, 1912

8/2BK4/3RQ3/bp2r3/1RB1k1P1/r6b/5P2/8

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Bd5#
    • 1...Rf3
      • 2.Bd3#
    • 1...Bxg4
      • 2.Qxg4#
    • 1...Bxc7
      • 2.Be2#
  • Tries
    • 1.Rd4+?
      • 1...Kxd4
        • 2.Qxe5#
      • 1...Kf3!
    • 1.Qg6+?
      • 1...Kf4
        • 2.Rf6#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Kf3!
  • Keys
    • 1.Rd3!
      • threat
        • 2.Qxe5#
      • 1...Rxd3+
        • 2.Bd5#
      • 1...Kf4
        • 2.Qf5#
      • 1...Rxe6
        • 2.f3#
      • 1...Bxg4
        • 2.Qxg4#
      • 1...Bxc7
        • 2.Bxb5#
      • 1...bxc4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(a);P_PINR(E),SBLOCK::R(B)+B(C),DCHECK
    • R(a);SBLOCK::R(B)+B(C),DCHECK
    • B(b);OGATE,P_PINQ(F),XP(D)::QAR2(F),XB(b)
    • B(d);N_GUARD,XB(G)::R(B)+B(C)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(c);N_SPINR(f),P-FLIGHT,XR(E)::QAB1(F),XR(f)
      • Refutation
        • K(c);N_SPINR(f),S_FLIGHT
    • Try
      • Q(F);CHECK,N_PINR(f),P_SPINP(D)
      • Vars
        • K(c);P-FLIGHT::R(E)
        • R(f);N_GUARD,N_PINP(D),P_SPINR(f)::QAB1(F),XR(f)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • R(E);
    • Threat
      • QAR1(F),XR(f)
    • Vars
      • R(a);CHECK,SBLOCK,XR(E)::R(B)+B(C),DCHECK
      • K(c);P-FLIGHT::QAR1(F)
      • R(f);N_SPINR(f),XQ(F)::P(A)
      • B(b);OGATE,P_PINQ(F),XP(D)::QAR2(F),XB(b)
      • B(d);N_GUARD,XB(G)::R(B)+B(C),XP(e)
      • P(e);OGATE,P_SPINP(e),XB(C)::QAR2(F),XP(e)
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