MESON Chess Problem Database

Problem Display
PID: 44844 (rQ2K1Nq/1p1PbPNp/1p1pRp2/3k4/2R2P2/3P4/B7/4r3 w - - 0 1)

Blandford, Hugh F

Recomm., BCF 043. Ty., 1942-1943

rQ2K1Nq/1p1PbPNp/1p1pRp2/3k4/2R2P2/3P4/B7/4r3

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.dxe4#
    • 1...Rxa2
      • 2.Qxb7#
    • 1...Ra3
      • 2.Qxb7#
    • 1...Ra4
      • 2.Qxb7#
    • 1...Ra5
      • 2.Qxb7#
    • 1...Ra6
      • 2.Qxb7#
    • 1...Bd8
      • 2.Qxd6#
      • 2.Qxb7#
    • 1...Bf8
      • 2.Sxf6#
  • Tries
    • 1.Kxe7?
      • threat
        • 2.Sxf6#
        • 2.Qxd6#
        • 2.Qxb7#
      • 1...Qxg7
        • 2.Qxd6#
        • 2.Qxb7#
      • 1...Qxg8
        • 2.Qxd6#
        • 2.Qxb7#
      • 1...Rxb8
        • 2.Sxf6#
      • 1...Ra7
        • 2.Sxf6#
        • 2.Qxd6#
      • 1...f5
        • 2.Sf6#
        • 2.Qxd6#
        • 2.Qxb7#
      • 1...Rxe6+!
  • Keys
    • 1.Ree4!
      • threat
        • 2.Red4#
      • 1...Qxg8+
        • 2.fxg8Q#
        • 2.fxg8B#
      • 1...Rxb8+
        • 2.Rc8#
      • 1...Qxg7
        • 2.Sxe7#
      • 1...Rxe4
        • 2.dxe4#
      • 1...Bd8
        • 2.Qxb7#
      • 1...Bf8
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(a);OGATE::P(B),XR(a)
    • R(i);N_PINQ(I),XB(A)::QAB(I),XP(f)
    • R(i);N_PINQ(I)::QAB(I),XP(f)
    • B(g);N_PINS(K),P_PINR(E)::S(K),XP(e)
  • Tries
    • Try
      • K(J);N_SPINQ(I),N_SPINS(K),P-FLIGHT,P_SPINR(E),XB(g)
      • Threat
        • DUALS(3)
      • Vars
        • R(i);XQ(I)::S(K),XP(e)
      • Refutation
        • R(a);CHECK,XR(E)
  • Actual
    • R(E);
    • Threat
      • R1(E)
    • Vars
      • Q(j);CHECK,OGATE,XS(K)::PXQ(j)=Q
      • R(i);CHECK,N_GUARD,XQ(I)::B(A)+R(C)
      • Q(j);N_PINS(K),XS(H)::S(K),XB(g)
      • R(a);OGATE,XR(E)::P(B),XR(a)
      • B(g);N_PINQ(I),P_PINR(E)::QAB(I),XP(f)
      • B(g);N_PINS(K),P_PINR(E)::S(K),XP(e)
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Developed and maintained by Brian Stephenson.
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