MESON Chess Problem Database

Problem Display
PID: 51421 (8/5p1B/2pN1P2/3p3b/1P1PR3/1p1kN3/1P6/R3K3 w Q - 0 1)

Massingham, HW

The Guardian, 1960

8/5p1B/2pN1P2/3p3b/1P1PR3/1p1kN3/1P6/R3K3

#2

10 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Rxd1#
    • 1...Bg6
      • 2.Rd1#
  • Tries
    • 1.Sb7?
      • threat
        • 2.Sc5#
      • 1...c5
        • 2.Sxc5#
      • 1...dxe4!
    • 1.Re5+?
      • 1...Bg6
        • 2.Rd1#
      • 1...Kxd4!
    • 1.Re6+?
      • 1...Bg6
        • 2.Rd1#
      • 1...Kxd4!
    • 1.Re7+?
      • 1...Bg6
        • 2.Rd1#
      • 1...Kxd4!
    • 1.Re8+?
      • 1...Bg6
        • 2.Rd1#
      • 1...Kxd4!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Re3#
      • 1...Kxc2
        • 2.Re2#
      • 1...bxc2
        • 2.Ra3#
      • 1...dxe4
        • 2.Bxe4#
      • 1...Bg6
        • 2.0-0-0#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(d);N_GUARD::R(A),XB(d)
    • B(d);N_GUARD::R(A)
  • Tries
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • P(e);::S(H),XP(e)
      • Refutation
        • P(c);P_SPINP(c),XR(G)
    • Try
      • R(G);CHECK
      • Vars
        • B(d);P_SPINB(d)::R(A)
      • Refutation
        • K(b);P-FLIGHT,XP(F)
    • Try
      • R(G);CHECK
      • Vars
        • B(d);P_SPINB(d)::R(A)
      • Refutation
        • K(b);P-FLIGHT,XP(F)
    • Try
      • R(G);CHECK
      • Vars
        • B(d);P_SPINB(d)::R(A)
      • Refutation
        • K(b);P-FLIGHT,XP(F)
    • Try
      • R(G);CHECK
      • Vars
        • B(d);P_SPINB(d)::R(A)
      • Refutation
        • K(b);P-FLIGHT,XP(F)
  • Actual
    • S(D);
    • Threat
      • B(J)+R(G),DCHECK
    • Vars
      • K(b);S_FLIGHT,XS(D)::B(J)+R(G),DCHECK
      • P(a);OGATEB,SBLOCK,XS(D)::R(A)
      • P(c);OGATE,P_SPINP(c),XR(G)::B(J),XP(c)
      • B(d);::0-0-0
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