MESON Chess Problem Database

Problem Display
PID: 87624 (8/nR1B4/4Kp1r/N1k2P2/3bR3/3rB1N1/1p2qp2/8 w - - 0 1)

Lubell, Martin S

American Chess Problemist, 1949

8/nR1B4/4Kp1r/N1k2P2/3bR3/3rB1N1/1p2qp2/8

#2

8 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Bxd4#
    • 1...Rb3
      • 2.Bxd4#
    • 1...Rc3
      • 2.Bxd4#
    • 1...Bxe3
      • 2.Rc4#
    • 1...Sb5
      • 2.Rxb5#
    • 1...Sc8
      • 2.Rb5#
  • Tries
    • 1.Bxh6?
      • threat
        • 2.Bf8#
      • 1...Qxe4+
        • 2.Sxe4#
      • 1...Sb5
        • 2.Rxb5#
      • 1...Bc3
        • 2.Sb3#
      • 1...Be3
        • 2.Rc4#
      • 1...Be5
        • 2.Rc4#
      • 1...Sc8
        • 2.Rb5#
      • 1...Sc6!
  • Keys
    • 1.Bf4!
      • threat
        • 2.Bd6#
      • 1...Qxe4+
        • 2.Sxe4#
      • 1...Sb5
        • 2.Rxb5#
      • 1...Bc3
        • 2.Sb3#
      • 1...Be3
        • 2.Rc4#
      • 1...Be5
        • 2.Rc4#
      • 1...Sc8
        • 2.Rb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(d);N_GUARD::B(A),XB(e)
    • B(e);N_SPINB(e),OGATE,XB(A)::R1(C)
    • S(i);N_GUARD::R1(G),XS(i)
    • S(i);N_GUARD::R1(G)
  • Tries
    • Try
      • B(A);N_PINB(e),P_SPINR(C),XR(h)
      • Threat
        • B(A)
      • Vars
        • Q(b);CHECK,XR(C)::S(B),XQ(b)
        • S(i);N_GUARD::R1(G),XS(i)
        • B(e);S_CUTR(d)::S(D)
        • B(e);N_PINR(C)::R1(C)
        • S(i);N_GUARD::R1(G)
      • Refutation
        • S(i);
  • Actual
    • B(A);N_PINB(e),P_SPINR(C)
    • Threat
      • B(A)
    • Vars
      • Q(b);CHECK,XR(C)::S(B),XQ(b)
      • S(i);N_GUARD::R1(G),XS(i)
      • B(e);S_CUTR(d)::S(D)
      • B(e);N_PINR(C)::R1(C)
      • S(i);N_GUARD::R1(G)
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