MESON Chess Problem Database

Problem Display
PID: 45020 (8/1qp5/4N1B1/1pbR1N1K/1Bk2P2/P2RpP1P/4p3/3rr3 w - - 0 1)

Laws, Benjamin Glover

Source?, 0000

8/1qp5/4N1B1/1pbR1N1K/1Bk2P2/P2RpP1P/4p3/3rr3

#2

11 + 9

3316 Chess Problem Text Book 1887

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd5
      • 2.Rc3#
    • 1...Bxb4
      • 2.Sxe3#
      • 2.R5d4#
    • 1...Bd4
      • 2.R5xd4#
    • 1...Bd6
      • 2.Sxe3#
      • 2.R5d4#
    • 1...Be7
      • 2.Sxe3#
      • 2.R5d4#
    • 1...Bf8
      • 2.Sxe3#
      • 2.R5d4#
  • Tries
    • 1.Sd6+?
      • 1...Bxd6
        • 2.R5d4#
      • 1...cxd6!
    • 1.Sxc5?
      • threat
        • 2.Sxe3#
        • 2.R5d4#
      • 1...Qxd5
        • 2.Rc3#
      • 1...Rxd3!
  • Keys
    • 1.Sed4!
      • threat
        • 2.Sxe3#
      • 1...Kxd3
        • 2.Sd6#
      • 1...Kxd5
        • 2.Bf7#
      • 1...Qxd5
        • 2.Rc3#
      • 1...Rxd3
        • 2.Rxc5#
      • 1...Bxd4
        • 2.R5xd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(h);P_PINS(H),SBLOCK,XR(G)::R1(B)
    • B(g);N_GUARD::R1(G),XB(g)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • B(g);XS(H)::R1(G)
      • Refutation
        • P(i);XS(H)
    • Try
      • S(J);XB(g)
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);P_PINS(H),SBLOCK,XR(G)::R1(B)
      • Refutation
        • R(a);XR(B)
  • Actual
    • S(J);
    • Threat
      • S(H),XP(d)
    • Vars
      • K(e);S_FLIGHT,XR(B)::B(K)+S(H)
      • K(e);OGATEB,S_FLIGHT,XR(G)::B(K)
      • Q(h);P_PINS(H),SBLOCK,XR(G)::R1(B)
      • R(a);SBLOCK,XR(B)::R1(G),XB(g)
      • B(g);OGATE,XS(J)::R1(G),XB(g)
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