MESON Chess Problem Database

Problem Display
PID: 17337 (B2R4/7r/1NN1p3/p3PpQp/Rb2k2K/5p2/2p3b1/B1nrn3 w - - 0 1)

Gamage, Frederick

1st Prize, Christian Science Monitor, 1946

B2R4/7r/1NN1p3/p3PpQp/Rb2k2K/5p2/2p3b1/B1nrn3

#2

9 + 13

14773 The Best American Chess Problems of 1946 1948
5397 Frederick Gamage (Prcic) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Rxd4#
    • 1...Scd3
      • 2.Se7#
      • 2.Rd4#
    • 1...Sed3
      • 2.Se7#
      • 2.Rd4#
  • Tries
    • 1.Sxb4+?
      • 1...Rb7
        • 2.Sd3#
      • 1...Rd5!
    • 1.Rxb4+?
      • 1...Rd4
        • 2.Rbxd4#
        • 2.Rdxd4#
      • 1...axb4!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Qe3#
      • 1...Kd3
        • 2.Qe3#
      • 1...Rxd4
        • 2.Rxd4#
      • 1...Rd3
        • 2.Se7#
      • 1...Bd2
        • 2.Bc3#
      • 1...Be7
        • 2.Sb4#
      • 1...f4
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(b);N_GUARD,N_SPINB(g)::R1(I),XR(b)
  • Tries
    • Try
      • S(G);CHECK,XB(g)
      • Vars
        • R(m);P_SPINR(m)::R(B)+S(G)
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • R(B);CHECK,XB(g)
      • Refutation
        • P(i);XR(B)
  • Actual
    • B(A);N_PINB(g)
    • Threat
      • QAR1(E)
    • Vars
      • K(h);S_FLIGHT::QAR1(E)
      • R(b);OGATE,XB(A)::R1(I),XR(b)
      • R(b);SBLOCK::B(H)+S(G)
      • B(g);OGATEB::R(B)+B(A)
      • B(g);P_PINQ(E),S_CUTR(m)::B(H)+S(G)
      • P(j);OGATEB,SBLOCK::QAB(E)
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